CN100394741C - User MAC frame transfer method, edge transfer device, and program - Google Patents

User MAC frame transfer method, edge transfer device, and program Download PDF

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Publication number
CN100394741C
CN100394741C CNB2005800000354A CN200580000035A CN100394741C CN 100394741 C CN100394741 C CN 100394741C CN B2005800000354 A CNB2005800000354 A CN B2005800000354A CN 200580000035 A CN200580000035 A CN 200580000035A CN 100394741 C CN100394741 C CN 100394741C
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mac frame
vlan
user
port
trunk
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CN1765085A (en
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波户邦夫
铃木宗良
片山文雄
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Nippon Telegraph and Telephone Corp
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Nippon Telegraph and Telephone Corp
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Abstract

An edge transfer device (2A) performs Ethernet encapsulation. Even when duplicate MAC address is used in a user network transfer is performed, in a relay network (1), according to the MAC address assigned by the edge transfer device (2A) without referencing the user MAC address, thereby enabling correct transfer. Moreover, by assigning a service VLAN identifier according to a subscriber port received for the user MAC frame in the edge transfer device (2A) and the VLAN identifier in the user MAC frame, it is possible to constitute a completely closed network for each user. A user belongs to a plurality of service VLAN via a single subscriber port and can select a service VLAN to which the user belongs by the VLAN.

Description

User's mac frame forwarding method, edge bridges
Technical field
The present invention relates to a kind of technology that is connected to a plurality of networks with network system that wide area network service is provided, more particularly, relate to a kind of user's mac frame in the Ethernet of the VPN that is suitable for organizing into groups a plurality of Ethernet (Ethernet) (registered trade mark) network and virtual closed circuit connection being provided service communication in group and pass on technology.
Background technology
In recent years, utilize the market of the wide area LAN service of ethernet technology to obtain developing by leaps and bounds.The industrial siding service that company's network has been inherited in the ATM service, with the frame trunk service of integrating speech and data and being exclusively used in data, and the wide area LAN that it is developed into the IP-VPN (IP-Virtual Private Network (IP-VPN (virtual private network))) that is adapted to the network outsourcing and be connected the LAN that has set up virtually serves.In wide area LAN communication, when having given a user user ID of VLAN (virtual lan), can provide a logic dedicated network, that is, and VPN (VPN (virtual private network)).
In VPN service, wide area LAN service can as it be an industrial siding the common network that provides is provided.The VPN service is called as virtual closed circuit network or VPN (virtual private network).More particularly, in this service, can use the subscriber phone network as the extension set in the company.User such as company prepares any phone number system of one two to seven bit digital.VPN user can utilize telephone number freely to call out mutually.Even in data communication, utilize VLAN stack frame transmission/reception data as phone.In VPN service, utilize user's mac frame (user's media access control (MAC) frame (Customer ' s Media Access Control Frame): be also referred to as ethernet frame (Ethernet frame)) transfer of data.
[user's mac frame pass in address space]
Address space during below explanation user's mac frame commonly used passes on.
Fig. 9 shows the normal schematic diagram with VLAN stack frame format.
In the stem 12E of VLAN stack frame format commonly used, the destination MAC Address, source MAC, the VLAN mark, type i D, user data, and FCS (Frame Check Sequence (Frame CheckSequence)) sends with such order.In each VLAN mark, type i D, preference ranking, CFI (regular format indicator (Canonical Format Indicator)) and VLAN ID send with such order.When receiving from user's mac frame that user network passes on, analysis package is contained in destination MAC Address and the VLAN ID in the header message of user AMC frame, the service vlan ID that receives the portal number of user's mac frame and be provided with for this portal number in advance.Service vlan ID adds user's mac frame to as the VLAN mark.By utilizing service vlan ID and destination MAC Address as key, from one know in advance pass on the port that search sends the table.The user's mac frame that receives is sent to this port.
A bridge analysis package in the backbone network is contained in destination MAC Address and the service vlan ID in the header message of user's mac frame.Utilize service vlan ID and destination MAC Address as key, search for the port of transmission from a table of knowing in advance that passes on.The user's mac frame that receives is sent to this port.
In above-mentioned prior art, backbone network is to manage according to identical address system with user network.Bridge in the backbone network be connected on the user network of backbone network search address on purpose.In addition, because service vlan ID is to use 12 realizations, therefore, possible scope is limited to 4,096.In addition, the bridge in the backbone network is with reference to VLAN ID, and therefore can not discern the terminal that has identical destination MAC Address among the same VPN on the different VLAN.
The example that is similar to the suggestion of this method commonly used has, " simple net Biodge device " (hereinafter referred to as first prior art) among the open 5-235942 of Japanese Patent Laid, " method of using in the packet communication and edge exchange " (hereinafter referred to as the 3rd prior art) among " frame forwarding method and frame bridge " (hereinafter referred to as second prior art) among the open 2003-273911 of Japanese Patent Laid and the open 2002-344476 of Japanese Patent Laid.
In first prior art, in a bridge HUB, provide the station address that is used for secondary LAN administrative unit.A frame converting unit among the bridge HUB will be in being connected to the data that the frame of communicating by letter between the station of elementary LAN is encapsulated into secondary LAN, thereby this frame can not be transferred to the destination-address of the frame of secondary LAN.
Destination-address only is used to pass on the frame that will communicate by letter between the station of a station that is connected to elementary LAN and a secondary LAN who is connected.In this arrangement, to compare with the arrangement of changing all frames pellucidly, the processing procedure that the frame converting unit is carried out is very simple.Requirement to the bridge processing speed is very loose, and can realize this device with low cost.
But first prior art does not connect the function of a plurality of elementary LAN virtually as VPN.
In the frame forwarding method of second prior art, the path of passing on of transfer frame is arranged between the node in the network.The terminal of transmit frame or the node outside the path of passing on send one will be by passing on the frame that the path passes on, and the frame from this frame is passed on writing in this frame about passing on the output route information of the routing information and the output route of the node of relevant terminal of passing on the path of passing in path of destination information.Then, send this frame.In this case, pass on the node of beginning in path,, determine the path of passing on that will be used to pass on, and frame sent to pass on the path according to the routing information that passes in the frame.Pass on the node of terminal point in path, according to the output route information in the frame, determine the output route that frame should output to from this node, and frame is sent to output route.By this arrangement, can provide the network that can hold numerous VP N.
But in second prior art, the path of passing on of transfer frame must set in advance between all nodes in network.
In the 3rd prior art, the original Ethernet grouping of each that produces in company, user or Internet Service Provider's first network (EP) is packaged among another EP.Give this EP with the interface IP address between first Ethernet (EN) and the 2nd EN such as the EN of city.Send the grouping of encapsulation according to this address.When the grouping of encapsulation surpassed the EP length that allows, the interface between first and second networks was cut apart original EP.The part of cutting apart that obtains is encapsulated as two encapsulating packets.
In this prior art, because VPN ID 12 bit representations, so possible scope is limited to 4,096.In addition, because the nonrated structure in VPN space, so manage pretty troublesome.The address usefulness of user oriented port is acted on the address of passing in backbone network.For that reason, if increased the quantity of the port that the user faces, the quantity of the address in the backbone network also increases so.Entity (VPN) is ([0022] section of the prior art) of determining according to the input port of grouping.Therefore, input port and VPN only allow man-to-man relation.In order to belong to a plurality of VPN, need a plurality of input ports and a plurality of logic that is connected to input port.
[interconnecting between stack formula vlan network and the backbone network]
Below commonly used interconnecting between explanation stack formula vlan network and the backbone network.
Figure 23 is the key diagram that shows user's mac frame forwarding method commonly used.
With reference to Figure 23, the stack formula vlan port 6E of stack formula VLAN edge bridges 2S receives the stack formula VLAN/MAC frame that passes on from stack formula vlan network 4E.When passing on a stack formula VLAN/MAC frame from stack formula vlan network 4F, it is received by stack formula vlan port 6F.Utilization is included in destination MAC Address, the VLAN ID of provider and VLAN ID in the header message of stack formula VLAN/MAC frame of reception as key, and stack formula VLAN edge bridges 2S searches for transmit port from passing on of knowing in advance the table.
By from stack formula VLAN/MAC frame, deleting the VLAN ID of provider etc., convert the stack formula VLAN/MAC frame that receives to the user mac frame.User's mac frame is sent to the port 8A to 8K of discovery.
Edge bridges 2Q receives user's mac frame by user oriented port 9A to 9K, and analysis package is contained in destination MAC Address and VLAN ID in the header message of user's mac frame, the service vlan ID that receives the port numbers of user's mac frame and set in advance for port numbers.By utilizing service vlan ID, VLAN ID and destination MAC Address, search for the trunk MAC Address of transmission from the table of knowing in advance that passes on, and search for the port of transmission according to the trunk MAC Address as key.User's mac frame is encapsulated in the trunk mac frame.The trunk mac frame is sent to port 7A and 7B towards backbone network.
In this prior art, interconnect in order to make stack formula vlan network 4E and 4F and backbone network 1, need two devices, that is, and stack formula VLAN edge bridges 2S and edge bridges 2Q.
In addition, be not used in the VLAN of provider that is identified in the user's mac frame that passes between stack formula VLAN edge bridges 2S and two devices of edge bridges 2Q and the method for service vlan.
As a kind of VLAN of provider of user's mac frame and optional method of service vlan discerned, be VLAN of each provider and service vlan preparation port.The port of VLAN of each provider and service vlan is connected by cable.In this case, in order to hold a large amount of VLAN of provider and service vlan, need a large amount of port and cable, and their management is very complicated.
In addition, in order to connect any one VLAN that belongs to any one VLAN of provider and any one VLAN that belongs to any one service vlan, needs are provided with stack formula VLAN edge bridges 2S and edge bridges 2Q for it.In order to identify annexation, two devices all need port and cable alone.
In addition, in the second and the 3rd prior art, stack formula vlan network can not be connected with backbone network.
[generation in loop in the backbone network]
Below frame passes on the generation in loop in the explanation backbone network.
Figure 37 is the schematic diagram that shows according to user's mac frame forwarding method of prior art.
In this prior art, in case receive user's mac frame from user oriented port 6A or 6B, edge bridges 2 is according to the VLAN ID of user oriented port and user's mac frame, and identification is corresponding to the service vlan ID of user's mac frame.In order to send user's mac frame, user's mac frame is encapsulated in the trunk mac frame, and sends to backbone network 1A or 1B from port 7A or 7B towards backbone network.
In case receive from towards the port 7A of backbone network or the trunk mac frame of 7B, edge bridges 2 is set to be included in service vlan ID in the trunk AMC frame corresponding to the service vlan ID that is included in the user's mac frame in the trunk mac frame.In order to send the trunk mac frame, from the trunk mac frame, extract user's mac frame and transmission from user oriented port 6A or 6B.
Bridge (not shown) analysis package among backbone network 1A or the 1B is contained in destination trunk MAC Address and the service vlan ID in the header message of trunk mac frame.By using service vlan ID and destination trunk MAC Address as key, from one know in advance pass on the port that search sends the table.The trunk mac frame is sent to this port.
In this prior art, when edge bridges 2 receives the device trunk mac frame that the port towards backbone network sends from itself from the port towards backbone network, since there is not method to detect its existence, thus can not determine it, and may produce the loop.In addition, even produced the loop, can not detect the loop when being connected in the backbone network of the port of backbone network.
In above-mentioned prior art, when the source address of the trunk AMC frame that receives from the port towards backbone network when edge bridges 2 is a invalid address such as broadcast address or multicast transfer address, because have no idea to detect its existence, thus can not determine it, and may transfer frame.
In above-mentioned prior art, when edge bridges 2 is being passed on towards carrying out loopback between the port of backbone network, and when not being the address of edge bridges from the destination-address of the trunk mac frame that receives towards the port of backbone network, owing to have no idea to detect its existence, so can not determine it, and may transfer frame.
In above-mentioned prior art,, can not determine the position in loop even in the trunk mac frame passes on, produced the loop.
Figure 31 is the schematic diagram that shows the VLAN stack frame format 15c of prior art.
In this prior art, edge bridges 2 receives the user's mac frame that passes on from user network, and analysis package is contained in destination MAC Address and VLANID in the header message of user's mac frame, the service vlan ID that receives the port numbers of user's mac frame and set in advance for port numbers.
Add service vlan ID to the user mac frame as the VLAN mark.By utilizing service vlan ID and destination MAC Address as key, from one know in advance pass on the port that search sends the table.User's mac frame is sent to this port.
Bridge (not shown) analysis package among backbone network 1A or the 1B is contained in destination MAC Address and the service vlan ID in the header message of user's mac frame.By utilizing service vlan ID and destination-address as key, from one know in advance pass on the port that search sends the table.User's mac frame is sent to this port.
In this prior art, when edge bridges receives the device stack formula VLAN/MAC frame that the port towards backbone network sends from itself from the port towards backbone network, since have no idea to detect its existence, thus can not determine it, and may produce the loop.In addition, even, can not detect the loop when being connected to when in the backbone network of the port of backbone network, having produced a loop.
In above-mentioned prior art,, can not determine the position in loop even in stack formula VLAN/MAC frame passes on, produced the loop.
Now the user's mac frame in the ethernet communication pass on technology in IEEE (Institute of Electrical and Electric Engineers) with the title standardization of " 802.1ad provider bridge (Provider Bridges) ".When patent application, do not find the references of the content of the such technology of explanation.
Summary of the invention
The problem to be solved in the present invention
As mentioned above, prior art has the problem of the address space of following relevant user's mac frame in passing on.
(1) address space separates:
When network broadens, and when having connected great amount of terminals, the quantity of MAC Address to be processed increases in the bridge in the backbone network, and passes on table and become huge.Therefore, required time of address resolution increases, and user's mac frame speed of passing on reduces and the manufacturing cost that relates to increases with the size of table with being directly proportional.Prescribe a time limit above the going up of size of table when the quantity of the terminal that is connected to network, do not have MAC Address to be deposited with in the table, and can not suitably search for the destination.In addition, the bridge on the backbone network can not be discerned the terminal with identical destination MAC Address on the different VLAN among the same VPN.
(2) a plurality of service vlan ID:
Because the possible range of service vlan ID is limited to 4,096, so the VPN that long-haul carrier signal post needs can not be set fully.In addition, because the nonrated structure in VPN space, so manage pretty troublesome.
(3) address assignment position:
With user oriented port as passing on the address of using in the backbone network.In this case, if the quantity of user oriented port increases, the quantity of the address in the backbone network increases so.
(4) user oriented port:
In order to make the user oriented port of a service vlan ID corresponding to a reception, a user only can be connected to a special-purpose VPN of each user oriented port.In order to be connected to a plurality of VPN, need a plurality of user oriented ports.
In addition, prior art has the following interconnective problem between bonded warehouse formula vlan network and the backbone network that has.
(5) for a stack formula vlan network and a backbone network are interconnected, need two devices, that is, and stack formula VLAN edge bridges and edge bridges.
(6) have no idea to be identified in the VLAN of provider and the service vlan of the user's mac frame that passes between stack formula VLAN edge bridges and the bridge.
(7), prepare port for the VLAN of provider and the service vlan of correspondence as a kind of optional way of discerning the VLAN of provider and the service vlan of user's mac frame.The port of corresponding VLAN of provider and service vlan is connected by cable.In this case, in order to hold a large amount of VLAN of provider and service vlan, need a large amount of port and cable, and their management is very complicated.
(8) in order to connect any VLAN that belongs to the VLAN of provider arbitrarily and to belong to the VLAN arbitrarily of service vlan arbitrarily, need stack formula VLAN edge bridges and edge bridges be set for it.In order to discern annexation, two devices all need independently port and cable.
(9) when stack formula vlan network and backbone network are interconnected, edge bridges must be to carry out the conversion of provider and service vlan at a high speed.
(10) for the conversion of VLAN of provider and service vlan, need a table with huge memory space.
In addition, prior art has the problem of the generation in loop in the following relevant backbone network.
(11) loop is detected and LOF:
When an edge bridges receives from a trunk mac frame towards the port of backbone network, may produce a loop.In addition, even produced a loop, can not detect this loop when being connected in the backbone network of the port of backbone network.
(12) have the losing of frame of invalid source address:
When the source address of the edge bridges trunk mac frame that the port towards backbone network receives from is invalid address such as broadcast address or multicast transfer address, owing to have no idea to detect its existence, so can not determine it, and may transfer frame.
(13) be addressed to the losing of frame of another device:
When having to carry out, an edge bridges do not pass on towards the loopback between the port of backbone network, and when not being the address of edge bridges from the destination-address of the trunk mac frame that receives towards the port of backbone network, owing to have no idea to detect its existence, so can not determine it, and may pass on this frame.
(14) determine circuit positions:
Even, can not determine the position in loop when in the trunk mac frame passes on, having produced a loop.
The present invention makes in order to address the above problem, and its purpose is that a kind of switching that can pass through in the backbone network part, user's mac frame forwarding method of the quantity of increase/minimizing MAC Address to be processed, edge bridges, and program will be provided.
Another object of the present invention provides a kind of user's mac frame forwarding method, edge bridges, and can cause edge bridges to realize the program that backbone network and stack formula vlan network interconnect and allow service-specific VLAN in the backbone network and the frame between the special-purpose provider vlan network in the stack formula vlan network to change.
The position that another purpose of the present invention provides a kind of existence that can detect loop in the backbone network/do not exist and loop is to pass on user's mac frame forwarding method of trunk mac frame, edge bridges, and program.
Way to solve the problem
In order to achieve the above object, according to the present invention, a kind of user's mac frame forwarding method that utilizes edge bridges is provided, edge bridges comprises the user oriented port of transmission/reception user mac frame and the port towards backbone network of transmission/reception trunk mac frame, and wherein be scheduled to comprise at least one destination trunk MAC Address, a source trunk MAC Address, a service vlan ID, trunk AMC frame format with user's mac frame, one or more service vlan ID have been scheduled to corresponding to each user oriented port, and only between user oriented port, pass on user's mac frame corresponding to same services VLANID, method comprises step: when the originators edge bridges receives user's mac frame from user oriented port, select a service vlan ID from service vlan ID corresponding to user's mac frame corresponding to user oriented port, according to service vlan ID, the VLAN ID of user's mac frame, with in the MAC Address of destination at least one, determine user oriented port that at least one sends user's mac frame and towards the port of backbone network, when determining to send user's mac frame from port towards backbone network, user's mac frame is encapsulated in the trunk mac frame, when terminal method, edge bridge receives from towards the trunk mac frame of the port of backbone network the time, to be set to the service vlan ID that is included in the trunk mac frame corresponding to the service vlan ID that is included in the user's mac frame in the trunk mac frame, according to service vlan ID, be included in the destination MAC Address of the user's mac frame in the trunk mac frame, VLAN ID, with in the purpose trunk MAC Address of trunk mac frame at least one, determine to send the user oriented port of trunk mac frame and towards the port of backbone network, and, when will from the trunk mac frame, extracting user's mac frame when user oriented port sends the trunk mac frame.
According to the present invention, a kind of edge bridges of system also is provided, wherein determined to comprise at least one destination trunk MAC Address, a source trunk MAC Address, a service vlan ID, trunk mac frame form with user's mac frame, one or more service vlan ID have been determined corresponding to each user oriented port, edge bridges comprises having transmission/the user oriented port of reception user mac frame and the port towards backbone network of transmission/reception trunk mac frame, be used for only between user oriented port, passing on the device of user's mac frame corresponding to same services VLAN ID, and storage device, be used for storage and pass on table to utilize service vlan ID, VLAN ID, with in the MAC Address of destination at least one combination as the search key, search destination trunk MAC Address and towards the set of the port and the user oriented port of backbone network, overflow is passed on table to utilize at least one combination among service vlan ID and the VLAN ID as the search key, search at least one port and user oriented port towards backbone network, with one towards the port table of backbone network to utilize destination trunk MAC Address as the search key, search is towards the port of backbone network.
The invention effect
According to the present invention, in the wide area network of a plurality of terminals of connection, edge bridges is carried out the Ethernet encapsulation.For this reason, can reduce the quantity that in backbone network, to use the MAC Address of switch processes widely.Therefore, can be to carry out the processing of passing on that switch carries out in the backbone network at a high speed and at a low price.
When in edge bridges, adding a service vlan ID to user's mac frame, can set up a closed fully network for each user.
The user can belong to a plurality of service vlans by a single user oriented port, and selects his service vlan that should belong to by VLAN ID.In addition, can classify ground management service VLAN ID.
Description of drawings
Fig. 1 shows it has been used block diagram according to the layout example of the network of user's mac frame forwarding method of the first embodiment of the present invention;
Fig. 2 is the functional-block diagram of demonstration according to the layout example of the edge bridges of the first embodiment of the present invention;
Fig. 3 A is the schematic diagram that the service vlan that uses in the edge bridges that is presented at according to the first embodiment of the present invention is determined the layout example of table;
Fig. 3 B is that the VLAN that uses in the edge bridges that is presented at according to the first embodiment of the present invention operates the schematic diagram of the layout example that exist/does not have table;
Fig. 3 C is the schematic diagram of the layout example of service vlan/VLAN conversion table of using in the edge bridges that is presented at according to the first embodiment of the present invention;
Fig. 3 D is the schematic diagram of the layout example of the VLAN filter table that uses in the edge bridges that is presented at according to the first embodiment of the present invention;
Fig. 3 E is the schematic diagram of layout example that passes on table that uses in the edge bridges that is presented at according to the first embodiment of the present invention;
Fig. 3 F is that the schematic diagram of layout example of table is passed in the overflow used in the edge bridges that is presented at according to the first embodiment of the present invention;
Fig. 3 G is the schematic diagram towards the layout example of the port table of backbone network that uses in the edge bridges that is presented at according to the first embodiment of the present invention;
Fig. 4 A is that the VLAN that uses in the edge bridges that is presented at according to the first embodiment of the present invention operates the schematic diagram of the layout example that exist/does not have table;
Fig. 4 B is the schematic diagram of the layout example of the VLAN filter table that uses in the edge bridges that is presented at according to the first embodiment of the present invention;
Fig. 4 C is the schematic diagram that the service vlan that uses in the edge bridges that is presented at according to the first embodiment of the present invention is determined the layout example of table;
Fig. 4 D is the schematic diagram of the layout example of service vlan/VLAN conversion table of using in the edge bridges that is presented at according to the first embodiment of the present invention;
Fig. 5 is the schematic diagram that shows by according to the form of user's mac frame of the user oriented port transmission/reception of the edge bridges of the first embodiment of the present invention;
Fig. 6 is the schematic diagram towards the form of the trunk mac frame of the port transmission/reception of backbone network that shows by according to the edge bridges of the first embodiment of the present invention;
Fig. 7 is the schematic diagram towards the another kind of form of the trunk mac frame of the port transmission/reception of backbone network that shows by according to the edge bridges of the first embodiment of the present invention;
Fig. 8 is the schematic diagram towards another form of the trunk mac frame of the port transmission/reception of backbone network that shows by according to the edge bridges of the first embodiment of the present invention;
Fig. 9 is the schematic diagram that shows the form of the frame that uses in the VLAN stacking commonly used;
Figure 10 shows that frame according to the edge bridges (transmit leg) of the first embodiment of the present invention passes on the flow chart of handling;
Figure 11 shows that frame according to the edge bridges (transmit leg) of the first embodiment of the present invention passes on the flow chart of processing (continuation);
Figure 12 shows that frame according to the edge bridges (transmit leg) of the first embodiment of the present invention passes on the flow chart of processing (continuation);
Figure 13 shows that frame according to the edge bridges (recipient) of the first embodiment of the present invention passes on the flow chart of handling;
Figure 14 shows that frame according to the edge bridges (recipient) of the first embodiment of the present invention passes on the flow chart of processing (continuation);
Figure 15 A shows the block diagram of layout example of network that it has been used user's mac frame forwarding method of a third embodiment in accordance with the invention;
Figure 15 B is presented at the schematic diagram of layout example that passes on table that uses in the edge bridges of a third embodiment in accordance with the invention;
Figure 16 A shows the block diagram of layout example of network that it has been used user's mac frame forwarding method of a fourth embodiment in accordance with the invention;
Figure 16 B is the schematic diagram that is presented at the layout example of the service vlan table that uses in the edge bridges of a fourth embodiment in accordance with the invention;
Figure 16 C is the schematic diagram that is presented at the layout example of the vlan table that uses in the edge bridges of a fourth embodiment in accordance with the invention;
Figure 17 A shows the block diagram of layout example that it has been used the network of user's mac frame forwarding method according to a fifth embodiment of the invention;
Figure 17 B is the schematic diagram of the layout example of the service vlan table that uses in the edge bridges that is presented at according to a fifth embodiment of the invention;
Figure 17 C is the schematic diagram of the layout example of provider's vlan table of using in the edge bridges that is presented at according to a fifth embodiment of the invention;
Figure 18 is the schematic diagram that is presented at the form of the stack formula VLAN frame that uses in the stack formula vlan network shown in Fig. 1;
Figure 19 is the schematic diagram of demonstration based on the form of user's mac frame of IEEE802 standard sequence;
Figure 20 is the schematic diagram towards the form of the trunk mac frame of the port transmission/reception of backbone network that shows edge bridges by a third embodiment in accordance with the invention;
Figure 21 is the schematic diagram towards the form of the trunk mac frame of the port transmission/reception of backbone network that shows edge bridges by a fourth embodiment in accordance with the invention;
Figure 22 is the schematic diagram towards the form of the trunk mac frame of the port transmission/reception of backbone network that shows edge bridges by according to a fifth embodiment of the invention;
Figure 23 shows the schematic diagram that it has been used the network configuration of user's mac frame forwarding method commonly used;
Figure 24 A shows that user's mac frame according to the edge bridges of the 3rd to the 5th embodiment of the present invention passes on the flow chart of handling (transmit leg);
Figure 24 B shows that user's mac frame according to the edge bridges of the 3rd to the 5th embodiment of the present invention passes on the flow chart of handling (recipient);
Figure 25 A shows that another user's mac frame according to the edge bridges of the 3rd to the 5th embodiment of the present invention passes on the flow chart of handling (transmit leg);
Figure 25 B shows that another user's mac frame according to the edge bridges of the 3rd to the 5th embodiment of the present invention passes on the flow chart of handling (recipient);
Figure 26 is the functional-block diagram of demonstration according to the layout example of the edge bridges of the 3rd to the 5th embodiment of the present invention;
Figure 27 shows the block diagram of layout example that it has been used the network of user's mac frame forwarding method according to a sixth embodiment of the invention;
Figure 28 is that user's mac frame of showing edge bridges according to a sixth embodiment of the invention passes on the flow chart of handling;
Figure 29 is the schematic diagram of form of user's mac frame that shows the user oriented port transmission/reception of the edge bridges by according to a sixth embodiment of the invention;
Figure 30 is the schematic diagram of another kind of form of user's mac frame that shows the user oriented port transmission/reception of the edge bridges by according to a sixth embodiment of the invention;
Figure 31 is the schematic diagram that shows the form of VLAN stack frame commonly used;
Figure 32 is the schematic diagram that the form of trunk mac frame is detected in the loop of using in the edge bridges that is presented at according to a sixth embodiment of the invention;
Figure 33 is the schematic diagram that the another kind of form of trunk mac frame is detected in the loop of using in the edge bridges that is presented at according to a sixth embodiment of the invention;
Figure 34 is the schematic diagram that another form of trunk mac frame is detected in the loop of using in the edge bridges that is presented at according to a sixth embodiment of the invention;
Figure 35 is the schematic diagram that another form of trunk mac frame is detected in the loop of using in the edge bridges that is presented at according to a sixth embodiment of the invention;
Figure 36 is the schematic diagram that another form of trunk mac frame is detected in the loop of using in the edge bridges that is presented at according to a sixth embodiment of the invention; With
Figure 37 shows the block diagram of layout example that it has been used the network of user's mac frame forwarding method commonly used.
Embodiment
Below with reference to the description of drawings embodiments of the invention.
[first embodiment]
Below with reference to user mac frame forwarding method and the edge bridges of Fig. 1 explanation according to the first embodiment of the present invention.Fig. 1 shows it has been used block diagram according to the layout example of the network of user's mac frame forwarding method of the first embodiment of the present invention.
With reference to figure 1, backbone network 1 comprises a plurality of edge bridges 2A to 2E and a plurality of trunk bridge 3A to 3E.Backbone network 1 connects 2A by edge bridges and receives user network 4A, is connected to user network 4B by edge bridges 2B, is connected to user network 4C and is connected to user network 4D by edge bridges 2D by edge bridges 2C.Be included in the reference number 41A to 41D among the user network 4A to 4D, 42A to 42D, 43A and 43D represent VLAN; 45 GC group connectors.Reference number 5A, 5B, 51 and 52 represent service vlan.
Fig. 2 is the functional-block diagram of demonstration according to the layout example of the edge bridges of the first embodiment of the present invention;
Edge bridges 2A has, pass on required functional device as frame, service vlan ID choice device 21A, user's mac frame transmit port is determined device 21B, trunk mac frame generation device 21C, service vlan ID setting device 22A, trunk mac frame transmit port determine device 22B and user's mac frame extraction element 22C.These functional devices can be realized by the information process unit (not shown) with CPU and peripheral circuits thereof.That is to say that these devices make hardware and program co-operation realize by reading and carry out preset program.These devices can form by a dedicated processes circuit.
Edge bridges 2A also has user oriented port 6A and 6B, and towards the port 7A and the 7B of backbone network.The quantity of user oriented port and be to determine as required towards the quantity of the port of backbone network.Always do not need to provide a plurality of user oriented ports and towards the port of backbone network.
In Fig. 2, as an example explanation edge bridges 2A.Remaining edge bridges 2B to 2E also has and the identical layout shown in Fig. 2.
Service vlan ID choice device 21A has when edge bridges receives user's mac frame from user oriented port 6A or 6B, from corresponding to selecting the function corresponding to the service vlan ID of user's mac frame the service vlan ID that receives user oriented port 6A or 6B.
User's mac frame transmit port determines that device 21B has, according to the VLAN ID of user's mac frame of service vlan ID and reception and at least one in the MAC Address of destination, determine user oriented port 6A that at least one will be used to send user's mac frame or 6B and towards the port 7A of backbone network or the function of 7B.
The function that trunk mac frame generation device 21C has that user's mac frame that will receive is encapsulated in the trunk mac frame and sends it from port 7A or 7B towards backbone network.
Service vlan ID setting device 22A has, when edge bridges receives from a trunk mac frame towards the port of backbone network, be set to be included in the function of the service vlan ID in the trunk mac frame corresponding to the service vlan ID that is included in user's mac frame in the trunk mac frame.
Trunk mac frame transmit port determines that device 22B has, according in service vlan ID, destination MAC Address, VLAN ID and the destination trunk MAC Address of the user's mac frame in the trunk mac frame that is included in reception at least one, determine to send the user oriented port 6A of trunk mac frame or the user's mac frame in the trunk mac frame or 6B or towards the port 7A of backbone network or the function of 7B.
User's mac frame extraction element 22C has, when extracting the function of user's mac frame from the trunk mac frame when user oriented port 6A or 6B send the trunk mac frame that receives.
Fig. 5 is the schematic diagram that shows by according to the form of user's mac frame of the user oriented port transmission/reception of the edge bridges of the first embodiment of the present invention.In each of user network 4A to 4D, information is that the form with the user's mac frame form 12A shown in Fig. 5 sends.User's mac frame has the information of destination MAC Address, source MAC, VLAN mark and FCS (FCS).The information of VLAN mark containing type ID, priority level, CFI and VLANID.In some networks, passing on does not have the user of VLAN mark mac frame.User's mac frame form 12A is based on the IEEE802 standard series.
As shown in fig. 1, user network 4A is in conjunction with VLAN 41A and VLAN 42A logical network.Terminal 45A is connected among the VLAN 42A.Equally, user network 4B is in conjunction with the logical network of VLAN 41B and VLAN 42B.Terminal 45B is connected among the VLAN 42B.User network 4C and 4D are also in conjunction with logical network.Terminal 45A, 45B, 45C and 45D have MAC Address alone.
As dotted line indication among Fig. 1, user network 4A and 4B form service vlan 5A.User network 4C and 4D form service vlan 5B.
Fig. 6 is the schematic diagram (corresponding to claim 1) towards the form of the trunk mac frame of the port transmission/reception of backbone network that shows by according to the edge bridges of the first embodiment of the present invention.
In backbone network 1, information is to send with the form of the mac frame of trunk shown in Fig. 6 form 12B.Except the information of user's mac frame, trunk MAC form 12B also has destination trunk MAC Address, source trunk MAC Address and comprises the information of the VLAN mark of service vlan ID.The VLAN mark comprises the information of priority level and service vlan ID.
Fig. 7 is the schematic diagram towards the another kind of form of the trunk mac frame of the port transmission/reception of backbone network that shows by according to the edge bridges of first embodiment of the invention.As the trunk mac frame form 12C shown in Fig. 7, the trunk mac frame can have the FCS of user's mac frame of the FCS that is independent of the trunk mac frame.
Fig. 8 is the schematic diagram (corresponding to claim 2 and 3) towards another form of the trunk mac frame of the port transmission/reception of backbone network that shows by according to the edge bridges of first embodiment of the invention.
Trunk mac frame form 12D as shown in Figure 8 is the same, and the trunk mac frame can have a plurality of VLAN marks.Service vlan ID in having connected all VLAN marks, and when handling as the service vlan ID of trunk mac frame, can increase the space of service vlan ID and can handle a large amount of service vlans.
[operation of first embodiment]
Below with reference to the operation of Figure 10 to 14 explanation according to the edge bridges of the first embodiment of the present invention.Figure 10 to 12 shows that frame according to the edge bridges (transmit leg) of the first embodiment of the present invention passes on the flow chart of handling.Figure 13 and 14 is to show that frame according to the edge bridges (recipient) of the first embodiment of the present invention passes on the flow chart of handling.
With reference to figures 10 to example of 12 explanations, wherein the terminal 45A of user's mac frame from user network 4A is transferred to the terminal 45D among the user network 4D.
As shown in fig. 1, user network 4A belongs to service vlan 5A, and user network 4D belongs to service vlan 5B.The VLAN 42D of the service vlan 5B that the VLAN 42A of the service vlan 5A that terminal 45A belongs to and terminal 45D belong to belongs to the VLAN 43A of service vlan 51 and the VLAN 43D of service vlan 52 respectively virtually, they are that logic is identical, thereby have formed extranets and be based upon on the device of backbone network.
The terminal 45A of user's mac frame from user network 4A sends to edge bridges 2A.Edge bridges 2A receives user's mac frame (step 100).The user's mac frame that receives has the user's mac frame form 12A shown in Fig. 5.Destination terminal among the destination MAC Address indication user network 4D of user's mac frame.Source terminal among the source MAC indication user network 4A.The number of the VLAN that VLAN ID indication destination terminal and source terminal belong to.In this user's mac frame, VLAN ID indicates VLAN 42.
According to VLAN ID with received the user oriented port of user's mac frame, edge bridges 2A determines service vlan ID and the VLAN ID (corresponding to claim 1) that user's mac frame belongs to.
Fig. 3 A to 3G is main demonstration, and that uses in the edge bridges according to the first embodiment of the present invention passes in the table, the schematic diagram of layout example (input pattern) that passes on table that uses when user oriented port receives.Fig. 3 A is the schematic diagram that shows the layout example of the definite table of service vlan.Fig. 3 B shows that exist/there is not the schematic diagram of the layout example of table in the VLAN operation.Fig. 3 C is the schematic diagram that shows the layout example of service vlan/VLAN conversion table.Fig. 3 D is the schematic diagram that shows the layout example of VLAN filter table.Fig. 3 E shows to pass on the schematic diagram of layout example of table.Fig. 3 F is that the schematic diagram of layout example of table is passed in the overflow used in the edge bridges that shows according to the first embodiment of the present invention.Fig. 3 G is the schematic diagram of display surface to the layout example of the port table of backbone network.
For example, utilize user oriented port, determine table 10A, determine a service vlan ID (step 101) (corresponding to claim 6) by the service vlan shown in the search graph 3A as key.Utilize user oriented port as key, exist/do not have table 10B, determine whether to carry out service vlan/VLAN and change (step 102) by the operation of the VLAN shown in the search graph 3B.When determining that will carry out service vlan/VLAN changes (step 103: be), utilize user oriented port as key, the service vlan shown in the search graph 3C/VLAN conversion table 10C, thus determine new service vlan ID and VLAN ID.By this step, determine VLAN ID and VLAN ID (step 104) (corresponding to claim 8 and 9) that the service-user mac frame belongs to.Determine that here user's mac frame belongs to the VLAN 43A of service vlan 51.
When definite user's mac frame does not have the VLAN mark and newly belongs to a VLAN when receiving (step 105 among Figure 11: be), the VLAN mark is added in user's mac frame (step 106).In this embodiment, because user's mac frame has the VLAN mark, so do not add new VLAN mark (corresponding to claim 9).
According to the user oriented port that receives user's mac frame, edge bridges 2A search, for example, VLAN operation existence/existence table 10B filters (step 107) thereby determine whether to carry out VLAN.When determining that will carry out VLAN filters (step 108: be), for example, utilize user oriented port as key, the VLAN filter table 10D shown in the search graph 3D, thus determine that the VLAN that is not filtered organizes (step 109).When the VLAN of user's mac frame ID is not included in the VLAN ID group, edge bridges 2A dropped users mac frame and do not pass on (step 110) (corresponding to claim 11).
Service vlan ID, the VLAN ID of user's mac frame that edge bridges 2A storage receives and the combination of source MAC and user oriented port, and automatically know and should have user oriented port as user's mac frame of the source MAC of address to its transmission.For example, utilize service vlan ID, the VLAN ID of user's mac frame and source MAC, passing on table 10E (step 111) shown in the search graph 3E, thereby determine whether there is corresponding set in the table as key.If do not deposit corresponding field (step 112: be), so with service vlan ID, VLAN ID, the set of source MAC and user oriented port is deposited with passes on (step 113) (corresponding to claim 4) in the table.
According to service vlan ID, VLAN ID and the destination MAC Address of user's mac frame, edge bridges 2A search for example, is passed on and is shown 10E, thereby determines the port (step 114) towards backbone network of destination trunk MAC Address and transmission.
When front, the destination of user's mac frame at the user oriented port of edge bridges, and when being deposited with in the edge bridges in advance (step 115: be), Search Results is not a destination trunk MAC Address and towards the port of backbone network, but user oriented port.Edge bridges sends to user oriented port (step 116) (corresponding to claim 5) with user's mac frame, and end frame is passed on the sequence of handling operation.
On the other hand, when the destination is except allocating in advance to user oriented port or towards the MAC Address of the port of backbone network or when distributing to address the MAC Address of edge bridges 2A (step 117: be), utilize destination trunk MAC Address as the search key, port table 10G shown in the search graph 3G, thereby definite port towards backbone network (corresponding to claim 5) to its transmission trunk mac frame towards backbone network.
Edge bridges 2A is set to the source trunk MAC Address (step 118) (corresponding to claim 13,14 and 15) of user's mac frame for the MAC Address that presets towards the port of backbone network, user oriented port or edge bridges.
According to destination trunk MAC Address, source trunk MAC Address and service vlan ID, edge bridges 2A is encapsulated in user's mac frame among the trunk mac frame form 12B shown in Fig. 6 (step 119).Edge bridges 2A is from sending the trunk mac frame (step 120) (corresponding to claim 1) of encapsulation towards the port of backbone network, and end frame is passed on the sequence of handling operation.
According to destination trunk MAC Address, the trunk mac frame of transmission is sequentially passed on by trunk bridge 3A → trunk bridge 3C → trunk bridge 3D, finally is transferred to edge bridges 2D (corresponding to claim 1).
(step 117: not), edge bridges 2A is as handling broadcasting user mac frame ground process user mac frame (step 121) so, and end frame is passed on to handle and operated if do not have corresponding field to be deposited with to pass among the table 10E.Broadcasting user mac frame forwarding method will illustrate afterwards.
Next, pass on processing with reference to the frame of Figure 13 and 14 explanation recipient edge bridges 2D.
Edge bridges 2D confirms that the trunk AMC address, destination of trunk mac frame belongs to edge bridges 2D (step 130) (corresponding to claim 5), and extracts the user's mac frame (step 131) that is included in the trunk mac frame.In deblocking, will be included in service vlan ID in the header message of trunk mac frame as the service vlan ID storage (step 132) of user's mac frame.Service vlan ID indicates service vlan 51 and 52 (corresponding to claim 1).
According to service vlan ID, VLAN ID and the destination MAC Address of user's mac frame, edge bridges 2D search, for example, passing on shown in Fig. 3 E shown 10E, thereby determines the user oriented port numbers (step 133) of transmission.If (step 134: not), edge bridges 2D is as handling broadcasting user mac frame ground process user mac frame (step 135) so, and end frame is passed on and handled the sequence of operating corresponding field in the table.Broadcasting user mac frame forwarding method will be explained below (corresponding to claim 5).
Fig. 4 A to 4D is main the passing in the table in the edge bridges of the present invention that show, the schematic diagram of layout example (output mode) that passes on table that uses when user's port sends over there.Fig. 4 A shows that exist/there is not the schematic diagram of the layout example of table in the VLAN operation.Fig. 4 B is the schematic diagram that shows the layout example of VLAN filter table.Fig. 4 C is the schematic diagram that shows the layout example of the definite table of service vlan.Fig. 4 D is the schematic diagram that shows the layout example of service vlan/VLAN conversion table.
Edge bridges 2D utilizes the user oriented port that sends user's mac frame as key, search, and for example, exist/there is not table 11A in the VLAN operation shown in Fig. 4 A, filters (step 136) thereby determine whether to carry out VLAN.When determining that will carry out VLAN filters (step 137: be), utilize user oriented port as key, search, for example, the VLAN filter table 11B shown in Fig. 4 B, thereby definite VLAN group (step 138) of not filtering.When the VLAN of user's mac frame ID is not included in the VLAN ID group (step 139: be), edge bridges 2D dropped users mac frame and not passing on (step 140) (corresponding to claim 12), and end frame is passed on the sequence of handling operation.
According among the user oriented port, service vlan ID and the VLANID that send user's mac frame at least one, edge bridges 2D determines service vlan ID and the VLAN ID that user's mac frame belongs to.For example, utilize user oriented port, search for one to be similar to VLAN operation and to exist/do not have the table of showing 11A, change (step 141) thereby determine whether to carry out service vlan/VLAN as key.When determining that will carry out service vlan/VLAN changes (step 142: be), utilize at least one among user oriented port, service vlan ID and the VLAN ID, service vlan shown in the search graph 4/VLAN conversion table 11D, thus determine a new service vlan ID and VLAN ID.By this step, service vlan ID and VLAN ID (step 143) that user's mac frame belongs to have been determined.
The service vlan ID indication service vlan 5B of user's mac frame.VLAN ID indication VLAN 42D.When in reception, determine that user's mac frame has a VLAN mark, and be not (step 144: be) when newly belonging to a VLAN, delete this VLAN mark (step 145) from user's mac frame.In the present embodiment, because user's mac frame belongs to VLAN 42D, so do not delete VLAN mark (corresponding to claim 10).
Edge bridges 2D compares (step 146) with the service vlan ID of user's mac frame and the service vlan ID of each user oriented port.If have the service vlan ID of any user oriented port and the service vlan ID of user AMC frame not to be inconsistent (step 147: deny), dropped users mac frame (step 148) (corresponding to claim 7), and end frame so passes on handles the sequence of operating.
If the service vlan ID of any user's mac frame conforms to (step 147: be), edge bridges 2D sends to user oriented port (step 149) with user's mac frame so, and end frame is passed on the sequence of handling operation.User's mac frame arrives user network 4D, and final incoming terminal 45D (corresponding to claim 1).
As mentioned above, according to present embodiment, in the wide area network that great amount of terminals connects, edge bridges is carried out the Ethernet encapsulation.For this reason, can significantly reduce the quantity that to pass through the MAC Address of switch processes in the backbone network.Therefore, can carry out the processing of passing on that switch carried out in the backbone network with higher speed and lower cost.
When in edge bridges, adding in user's mac frame, can set up a closed fully network to a service vlan ID for each user.
The user can belong to a plurality of service vlans by a single user oriented port, and the service vlan of selecting him to belong to by a VLAN ID.In addition, can classify ground management service VLAN ID.
[second embodiment]
Below explanation is according to the user MAC forwarding method and the edge bridges of second embodiment of the invention.
In above-mentioned first embodiment, illustrated by edge bridges pass on will transmission/reception between two terminals normally hitting of user's mac frame pass on.In a second embodiment, illustrate that the broadcasting that sole user's mac frame is transferred to great amount of terminals concurrently passes on.Identical among the layout example of the network of second embodiment and the layout example of edge bridges and the embodiment shown in Fig. 1 and 2, and omitted their detailed description.
[operation of second embodiment]
Below the example of operation of user's mac frame of the terminal 45A broadcasting from user network 4A is passed in explanation.In the foregoing description, user network 4A belongs to service vlan 5A, and user network 4D belongs to service vlan 5B.VLAN 42A and the 42B of service vlan 5A, and VLAN 42C and the 42D of service vlan 5B, belong to the VLAN 43A of service vlan 51 and the VLAN 43D of service vlan 53 respectively virtually, they are that logic is identical, thereby form an external network and be based upon on the device of backbone network.
Edge bridges 2A receives the user's mac frame from the terminal 45A among the user network 4A.The user's mac frame that receives has user's mac frame form 12A.Broadcast address of destination MAC Address indication of user's mac frame.Source terminal among the source MAC indication user network 4A.The number of the VLAN that the VLAN ID indication source terminal of user's mac frame belongs to.The VLAN mark that comprises VLAN ID is an option.
According to VLAN ID and the user oriented port that receives user's mac frame, edge bridges 2A determines service vlan ID and the VLAN ID (corresponding to claim 1) that user's mac frame belongs to.
For example, utilize user oriented port, determine table 10A, determine service vlan ID (corresponding to claim 6) by searching for the service vlan shown in above-mentioned Fig. 3 A as key.By utilizing user oriented port as key, search for the VLAN operation shown in above-mentioned Fig. 3 B and exist/do not have table 10B, determine whether to carry out service vlan/VLAN conversion.When determining that will carry out service vlan/VLAN changes, utilize user oriented port and service vlan ID as key, search for the service vlan shown in above-mentioned Fig. 3 C/VLAN conversion table 10C, thereby determine a new service vlan ID and VLAN ID.By this step, service vlan ID and VLAN ID that user's mac frame belongs to have been determined.Determine that user's mac frame belongs to the VLAN 43A of service vlan 51 (corresponding to claim 8 and 9) here.
When determining that user's mac frame does not have the VLAN mark and newly belongs to a VLAN when receiving, add a VLAN mark to the user mac frame.In the present embodiment, because user's mac frame has the VLAN mark, so do not add new VLAN mark (corresponding to claim 9).
The user oriented port that receives user's mac frame by utilization is as key, edge bridges 2A search, and for example, exists/there is not table 10B in the VLAN operation, thereby determines whether to carry out the VLAN filtration.When determining that will carry out VLAN filters, utilize user oriented port as key, search, for example, and the VLAN filter table 10D shown in above-mentioned Fig. 3 D, thus determine not filter the VLAN group.
When the VLAN of user's mac frame ID is not included in the VLAN ID group, edge bridges 2A dropped users mac frame and do not pass on (corresponding to claim 11).
The source MAC of user's mac frame of edge bridges 2A stores service VLAN ID, VLAN ID and reception, and the combination that receives the user oriented port of user's mac frame, and automatically know and to send a user oriented port that has as user's mac frame of the source MAC of address to it.
For example, utilize service vlan ID, VLAN ID and source MAC, search for passing on shown in above-mentioned Fig. 3 E and show 10E, thereby determine whether there is corresponding set in the table as key.If exist corresponding to set, the set of service vlan ID, VLAN ID, source MAC and user oriented port additionally is stored in passes on (corresponding to claim 4) in the table so.
For example, utilize service vlan ID, the VLAN ID of user's mac frame and destination MAC Address as key, edge bridges 2A search for example, is passed on table 10E.Determine that here the destination MAC Address is a broadcast address (corresponding to claim 5).
For example, the service vlan ID that utilizes user's mac frame is as key, edge bridges 2A searches for the overflow shown in above-mentioned Fig. 3 F and passes on table 10F, thereby determines the user oriented port of one or more transmissions and towards the port (corresponding to claim 5) of backbone network.
When will be from one the port towards backbone network when sending user's mac frame, edge bridges 2A in advance for the user oriented port that receives user's mac frame, be set to the source trunk MAC Address (corresponding to claim 13,14 and 15) of user's mac frame towards the MAC Address of the port of backbone network or edge bridges setting.According to destination trunk MAC Address, source trunk MAC Address and service vlan ID, user's mac frame is encapsulated in the trunk mac frame form (corresponding to claim 1).
Destination trunk MAC Address is broadcast address (corresponding to claim 5).
When will be when a user oriented port sends user's mac frame, edge bridges 2A carry out encapsulation.Because the trunk MAC Address that sends is a broadcast address, so the trunk mac frame is sequentially passed on by edge bridges 2A → trunk bridge 3A → trunk bridge 3B and 3C, trunk bridge 3B → edge bridges 2B, trunk bridge 3C → trunk bridge 3D and 3E, trunk bridge 3D → edge bridges 2C and 2E, and trunk bridge 3E → edge bridges 2D.When passing on, when trunk bridge 3D not only according to destination trunk MAC Address but also according to service vlan ID, determine that edge bridges 2E does not have Connection Service VLAN 51 and 52, and when user's mac frame not being transferred to edge bridges 2E, can improving and pass on efficient (corresponding to claim 5) in the backbone network.
Edge bridges 2B, 2C, 2D and the 2E that receives the trunk mac frame confirms that the destination trunk MAC Address of trunk mac frame is a broadcast address (corresponding to claim 5), and extracts the user's mac frame that is included in the trunk mac frame.In deblocking, will be included in service vlan ID in the header message of trunk mac frame as the service vlan ID storage (corresponding to claim 1) of user's mac frame.
Edge bridges 2B, 2C, 2D and 2E are according to purpose service vlan ID, VLAN ID and the destination MAC Address of user's mac frame, and search is for example passed on and shown 10E, thus the user oriented port numbers that search sends.Determine that the destination MAC Address is a broadcast address here.
According to the service vlan ID of user's mac frame, edge bridges 2A, 2B, 2C, 2D and 2E search, for example table 10F is passed in overflow, thereby determines one or more user oriented ports and towards the port of backbone network.If the port of transmission is the port identical with the port that receives user's mac frame, this port is not sent (corresponding to claim 5) so.
According to the user oriented port of user's mac frame, edge bridges 2A, 2B, 2C, 2D and 2E search, for example, exist/there is not table 11A in the VLAN operation shown in above-mentioned Fig. 4 A, filters thereby determine whether to carry out VLAN.When determining that will carry out VLAN filters, for example, search for the VLAN filter table 11B shown in above-mentioned Fig. 4 C, the VLAN ID that will filter with search organizes.When the VLAN of user's mac frame ID is not included in the VLAN ID group of discovery, dropped users mac frame (corresponding to claim 12).
According to the user oriented port of user's mac frame, edge bridges 2A, 2B, 2C, 2D and 2E search, for example, exist/there is not table 11A in the VLAN operation, thereby determines whether to carry out service vlan/VLAN conversion.When determining that will carry out service vlan/VLAN changes, for example, utilize at least one among user oriented port, service vlan ID and the VLAN ID, search for the service vlan shown in above-mentioned Fig. 4/VLAN conversion table 11D, thereby determine a new service vlan ID and VLAN ID.By this step, service vlan ID and VLAN ID (corresponding to claim 10) that user's mac frame belongs to have been determined.
If any service vlan ID of user oriented port and the service vlan ID of user's mac frame are not inconsistent, edge bridges 2A, 2B, 2C, 2D and 2E dropped users mac frame so.Otherwise, send user's mac frame (corresponding to claim 7).
Edge bridges 2A, 2B, 2C, 2D and 2E send to user oriented port with user's mac frame.User's mac frame arrives destination network (corresponding to claim 1).
When the flow chart shown in Figure 10 to 14 being prepared as a program and be recorded on the recording medium such as CD-ROM, user's mac frame of the present invention passes on program and can sell easily or lease.In addition, in the computer of the edge bridges that recording medium is loaded into user's mac frame conveyer system of the present invention, and install and during executive program, can easily realize the present invention.
[the 3rd embodiment]
User's mac frame forwarding method and edge bridges below with reference to Figure 15 A and 15B explanation a third embodiment in accordance with the invention.Figure 15 A is the block diagram of layout example that shows the network of the user's mac frame forwarding method used a third embodiment in accordance with the invention.In Figure 15 A, with reference number representative identical or similar parts (corresponding to claim 16 to 20) identical among above-mentioned Fig. 1 and 2.Figure 15 B shows the schematic diagram of layout example that passes on table that uses in the edge bridges of a third embodiment in accordance with the invention.
With reference to figure 15A, edge bridges 2A has a plurality of stack formula vlan port 6E and 6F, and a plurality of port 7A and 7B towards backbone network.The quantity of stack formula vlan port 6E and 6F and be to determine as required towards the quantity of the port 7A of backbone network and 7B.Always do not need to provide a plurality of stack formula vlan ports or towards the port of backbone network.Edge bridges 2A also can have one or more user oriented ports with transmission/reception user mac frame.
In edge bridges 2A, preset a fixed value 13B.Edge bridges 2A have one pass on the table 13A.
Figure 18 is the schematic diagram of the form of the frame that uses among vlan network 4E of stack formula shown in the displayed map 15A and the 4F.
With reference to figure 15A, edge bridges 2A is connected to backbone network 1 by the port 7A towards backbone network, is connected to stack formula vlan network 4E and is connected to stack formula vlan network 4F by stack formula vlan port 6F by stack formula vlan port 6E.
In stack formula vlan network 4E and 4F, send user profile with the stack formula VLAN/MAC frame format 14A shown in Figure 18.Stack formula VLAN/MAC frame format has the information of a destination MAC Address, a source MAC, two VLAN marks and a user data.The one VLAN mark comprises the information of priority level and the VLAN ID of provider.The 2nd VLAN mark comprises the information of priority level and VLAN ID.Sometimes pass on as required and do not have user's mac frame of the 2nd VLAN mark.
Figure 20 is the schematic diagram (the 3rd embodiment) towards the form of the trunk mac frame of the port transmission/reception of backbone network that shows from the edge bridges shown in Figure 15 A.
In backbone network 1A, send user profile with the trunk mac frame form 14C shown in Figure 20.Except the information based on user's mac frame of IEEE802 standard sequence, the trunk mac frame has the information of a destination trunk MAC Address, a source trunk MAC Address and a VLAN mark.The VLAN mark comprises the information of priority level and service vlan ID.Figure 19 is the schematic diagram of demonstration based on the form of user's mac frame 14B of IEEE802 standard sequence.
Figure 21 is the schematic diagram (the 4th embodiment) towards the form of the trunk mac frame of the port transmission/reception of backbone network that shows from the edge bridges shown in Figure 15 A.
As shown in Figure 21, the trunk mac frame can have the FCS of user's mac frame of the FCS that is independent of the trunk mac frame.
Figure 22 is the schematic diagram (the 5th embodiment) (corresponding to claim 17 and 18) towards the form of the trunk mac frame of the port transmission/reception of backbone network that shows from the edge bridges of Figure 15 A.
15 indicated as among Fig. 8, the trunk mac frame can have a plurality of VLAN marks.Service vlan ID in having connected all VLAN marks and when handling as the service vlan ID of trunk mac frame can increase the space of service vlan ID and can handle a large amount of service vlans.
[operation of the 3rd embodiment]
The following example of operation of the edge bridges of explanation a third embodiment in accordance with the invention, wherein the stack formula vlan network 4E of user's mac frame from Figure 15 A is transferred to backbone network 1 (corresponding to claim 16).
When user's mac frame is imported among the stack formula vlan network 4E, a VLAN mark is added in user's mac frame, and convert user's mac frame to stack formula VLAN/MAC frame format.
Edge bridges 2A receives the stack formula VLAN/AMC frame from the stack formula vlan port 6E that is connected to stack formula vlan network 4E.Edge bridges 2A is with reference to the VLAN ID of provider in the stack formula VLAN/MAC frame, the fixed value 13B that presets among the edge bridges 2A.Edge bridges 2A connects VLAN ID of provider and fixed value 13B, has the service vlan ID of user's mac frame of the VLAN ID of provider with formation.Can use method of attachment arbitrarily.The VLAN ID of provider can be set to a high position, fixed value can be set to low level.On the contrary, also the VLAN ID of provider can be set to low level, and fixed value is set to a high position.As selection, the VLAN ID of provider can be assigned to any position of service vlan ID and fixed value is assigned to all the other any positions.
According to service vlan ID, the VLAN ID of user's mac frame and at least one in the MAC Address of destination, edge bridges 2A search for example, is passed on table 13A, thereby determines the destination trunk MAC Address that sends and towards the port of backbone network.Before the stack formula vlan port of the destination of user's mac frame at edge bridges 2A, and edge bridges 2A is when knowing in advance, and Search Results is not a destination trunk MAC Address and towards the port of backbone network, but a stack formula vlan port.Edge bridges 2A adds the VLAN mark that comprises the VLAN ID of provider to the user mac frame, and it is sent to stack formula vlan port.
If there is not corresponding field in the table, so edge bridges 2A as Chu Liing broadcasting user mac frame process user mac frame.
Edge bridges 2A is set to the source trunk MAC Address of user's mac frame for the MAC Address that presets towards the port of backbone network, user oriented port or another edge bridges.
Edge bridges 2A is encapsulated into user's mac frame among the trunk mac frame form 14C (Figure 20) according to destination trunk MAC Address, source trunk MAC Address and service vlan ID.Edge bridges 2A sends to port 7A or 7B towards backbone network with the trunk mac frame of encapsulation.
Below explanation is transferred to user's mac frame the operation of stack formula vlan network 4E from backbone network 1.
When user's mac frame is imported into backbone network 1, user's mac frame is encapsulated in the trunk mac frame form.
Edge bridges 2A receives from the trunk mac frame towards the port 7A of backbone network that is connected to backbone network 1.Edge bridges 2A is with reference to the service vlan ID in the trunk mac frame, and it is set to the service vlan ID of the user's mac frame that is included in the trunk mac frame.
According to service vlan ID, the VLAN ID of user's mac frame and at least one in the MAC Address of destination, edge bridges 2A search for example, is passed on table 13A, thereby determines the destination trunk MAC Address that sends and towards the port of backbone network.When before the stack formula vlan port of the destination of user's mac frame at edge bridges 2A and when edge bridges 2A is to know in advance, Search Results is not a destination trunk MAC Address and towards the port of backbone network, but stack formula vlan port.Edge bridges 2A is set to the VLAN ID of provider that will add user's mac frame to the part of service vlan ID.
Can be from the VLAN ID of provider of position extraction arbitrarily.The VLAN ID of provider can extract from a high position or the low level of service vlan ID.As selection, can form the VLAN ID of provider by any position of Connection Service VLAN ID.Edge bridges 2A adds the VLAN mark that comprises the VLAN ID of provider to the user mac frame, and it is sent to stack formula vlan port.
If in the table not corresponding to field, so edge bridges 2A as Chu Liing broadcasting user mac frame process user mac frame.
As mentioned above, according to present embodiment, stack formula VLAN is connected by a single device with backbone network.Therefore, do not need two devices, that is, and stack formula VLAN edge bridges and edge bridges.In addition, solved the problem of the device that does not have the VLAN of provider that is used to be identified in user's mac frame that stack formula VLAN edge bridges and edge bridges pass between the two and service vlan.Do not need to prepare port and be used as a kind of be used to the discern VLAN of provider of user's mac frame and the option means of service vlan for the VLAN of each provider and service vlan.Therefore, do not need to provide many ports and cable (corresponding to claim 16 to 18).
In addition, pass on processing (fixed value distribution) to carry out at a high speed.When stack formula vlan network and backbone network are interconnected, by edge bridges to carry out the conversion of provider and service vlan at a high speed.In addition, do not need to be used for the table with huge memory space (corresponding to claim 19 and 20) of VLAN ID of provider and service vlan ID conversion.
[the 4th embodiment]
Next, the user's mac frame forwarding method and the edge bridges of a fourth embodiment in accordance with the invention are described with reference to figures 16A to 16C.Figure 16 A is the block diagram of layout example that shows the network of the user's mac frame forwarding method used a fourth embodiment in accordance with the invention.In Figure 16 A, used with above-mentioned Fig. 1,2 and 15A in identical reference number represent identical parts (corresponding to claim 16 to 18,21 and 22).Figure 16 B is the schematic diagram that is presented at the layout example of the service vlan table that uses in the edge bridges of a fourth embodiment in accordance with the invention.Figure 16 C is the schematic diagram that is presented at the layout example of the vlan table that uses in the edge bridges of a fourth embodiment in accordance with the invention.
With reference to figure 16A, edge bridges 2A has a plurality of stack formula vlan port 6E and 6F, and a plurality of port 7A and 7B towards backbone network.The quantity of stack formula vlan port 6E and 6F and be to determine as required towards the quantity of the port 7A of backbone network and 7B.Always do not need to provide a plurality of stack formula vlan ports or towards the port of backbone network.Edge bridges 2A also can have the user oriented port of one or more transmissions/reception user mac frame.
Show the 13A except passing on, edge bridges 2A also has service vlan table 13C and vlan table 13D.
In the example shown in Figure 16 A, edge bridges 2A is connected to backbone network 1 by the port 7A towards backbone network, is connected to stack formula vlan network 4E and is connected to stack formula vlan network 4F by stack formula vlan port 6F by stack formula vlan port 6E.
[operation of the 4th embodiment]
Below explanation is as an example of the operation of the edge bridges of a fourth embodiment in accordance with the invention, and wherein user's mac frame is transferred to backbone network 1 (corresponding to claim 16) from stack formula vlan network 4E in Figure 16 A.
When user's mac frame being input to stack formula vlan network 4E, a VLAN mark is added in user's mac frame, and converts user's mac frame to stack formula VLAN/MAC frame format.
Edge bridges 2A receives the stack formula VLAN/MAC frame from the stack formula vlan port 6E that is connected to stack formula vlan network 4E.
According to the VLAN ID of provider in the stack formula VLAN/MAC frame, the VLAN ID of user's mac frame that has the VLAN ID of provider and at least one in the stack formula vlan port, edge bridges 2A determines the service vlan ID of user's mac frame.
For example, the Search Results that will obtain by the table according to the VLAN ID of provider, VLAN ID and stack formula vlan port search service vlan table 13C and so on is connected to the VLAN ID of provider, forms the service vlan ID of user's mac frame.Can use any one method of attachment.The VLAN ID of provider can be set to a high position, and Search Results can be set to low level.On the contrary, also the VLAN ID of provider can be set to low level, and Search Results can be set to a high position.As selection, can be assigned to the VLAN ID of provider any position of service vlan ID, and Search Results can be assigned to remaining any position.
According to service vlan ID, the VLAN ID of user's mac frame and at least one in the MAC Address of destination, table 13A is for example passed in edge bridges 2A search, thereby determines to send to destination trunk MAC Address and towards the port of backbone network.When before the stack formula vlan port of the destination of user's mac frame at edge bridges 2A and when edge bridges 2A knows in advance, Search Results is not a destination trunk MAC Address and towards the port of backbone network, but a stack formula vlan port.Edge bridges 2A adds the VLAN mark that comprises the VLAN ID of provider to the user mac frame, and it is sent to stack formula vlan port.
If in the table not corresponding to field, so edge bridges 2A as Chu Liing broadcasting user mac frame process user mac frame.
Edge bridges 2A is set to the source trunk MAC Address of user's mac frame for the MAC Address that presets towards the port of backbone network, user oriented port or another edge bridges.
According to destination trunk MAC Address, source trunk MAC Address and VLAN ID, edge bridges 2A is packaged into trunk mac frame form 14C (Figure 20) with user's mac frame.The trunk mac frame of edge bridges 2A encapsulation sends to the port towards backbone network.
Next, the operation that user's mac frame is transferred to stack formula vlan network 4E from backbone network 1 is described.
When user's mac frame is imported into backbone network 1, user's mac frame is encapsulated as trunk mac frame form.
Edge bridges 2A receives from the trunk mac frame towards the port 7A of backbone network that is connected to backbone network 1.Edge bridges 2A is with reference to the service vlan ID in the trunk mac frame, and it is set to the service vlan ID of the user's mac frame that is included in the trunk mac frame.
According to service vlan ID, the VLAN ID of user's mac frame and at least one in the MAC Address of destination, table 13A is for example passed in edge bridges 2A search, thereby determines the destination trunk MAC Address that sends and towards the port of backbone network.When the destination of user's mac frame when the stack formula vlan port front of edge bridges 2A and edge bridges 2A know in advance, Search Results is not a destination trunk MAC Address and towards the port of backbone network, but a stack formula vlan port.Edge bridges 2A partly is set to service vlan ID the VLAN ID of provider that will add user's mac frame to.The VLAN ID of provider can be extracted from the optional position.The VLAN ID of provider can be extracted by a high position or the low level from service vlan ID.As selection, the VLAN ID of provider can be that any position by Connection Service VLAN ID forms.
According in the service vlan ID of user's mac frame part, VLAN ID and the stack formula vlan port at least one, edge bridges 2A search, vlan table 13D for example, thus determine VLAN ID.
Edge bridges 2A adds the VLAN mark that comprises the VLAN ID of provider to the user mac frame, and it is sent to stack formula vlan port.
If there is not corresponding field in the table, edge bridges 2A is as handling broadcasting user mac frame ground process user mac frame so.
As mentioned above, according to present embodiment, conversion provider/service vlan and VLAN.Therefore, in the time will being connected to any VLAN that belongs to any service vlan to any VLAN that belongs to any VLAN of provider, do not need its setting (corresponding to claim 21 and 22) for stack formula VLAN edge bridges and edge bridges.
[the 5th embodiment]
Next, referring to figs. 17A through 17C explanation user's mac frame forwarding method and edge bridges according to a fifth embodiment of the invention.Figure 17 A is the block diagram that shows the layout example of the network that uses user's mac frame forwarding method according to a fifth embodiment of the invention.In Figure 17 A, with above-mentioned Fig. 1,2 with 15A in identical reference number representative identical or similar parts (corresponding to claim 16 to 18,23 and 24).Figure 17 B is the schematic diagram of the layout example of the service vlan table that uses in the edge bridges that is presented at according to a fifth embodiment of the invention.Figure 17 C is the schematic diagram that is presented at the layout example of the vlan table that uses in the edge bridges of the fifth embodiment of the present invention.
With reference to figure 17A, edge bridges 2A has a plurality of stack formula vlan port 6E and 6F and a plurality of port 7A and 7B towards backbone network.The quantity of stack formula vlan port and be to determine as required towards the quantity of the port of backbone network.Always do not need to provide a plurality of stack formula vlan ports or towards the port of backbone network.
Edge bridges 2A also can have the user oriented port of one or more transmissions/reception user mac frame.
Show the 13A except passing on, edge bridges 2A also has service vlan table 13E and the vlan table 13F of provider.
In the example shown in Fig. 3, edge bridges 2A is connected to backbone network 1 by the port 7A towards backbone network, is connected to stack formula vlan network 4E and is connected to stack formula vlan network 4F by stack formula vlan port 6F by stack formula vlan port 6E.
[operation of the 5th embodiment]
An example of the operation of conduct edge bridges according to a fifth embodiment of the invention below is described, wherein in Figure 17 A, user's mac frame is transferred to backbone network 1 (corresponding to claim 16) from stack formula vlan network 4E.
When user's mac frame is imported into stack formula vlan network 4E, adds a VLAN mark to the user mac frame, and convert user's mac frame to stack formula VLAN/MAC frame format.
Edge bridges 2A receives the stack formula VLAN/MAC frame from the stack formula vlan port 6E that is connected to stack formula vlan network 4E.
According to the VLAN ID of provider in the stack formula VLAN/MAC frame, the VLAN ID of user's mac frame that has the VLAN ID of provider and at least one in the stack formula vlan port, edge bridges 2A determines the service vlan ID and the VLAN ID of user's mac frame.
For example, according to the VLAN ID of provider, VLAN ID and stack formula vlan port, the table of search such as service vlan table 13E is to determine the service vlan ID and the VLAN ID of user's mac frame.
According to service vlan ID, the VLAN ID of user's mac frame and at least one in the MAC Address of destination, table 13A is for example passed in edge bridges 2A search, thereby determines the destination trunk MAC Address that sends and towards the port of backbone network.When the destination of user's mac frame when the stack formula vlan port front of edge bridges 2A and edge bridges 2A have known in advance, Search Results is not a destination trunk MAC Address and towards the port of backbone network, but a stack formula vlan port.Edge bridges 2A adds a VLAN mark that comprises the VLAN ID of provider to the user mac frame, and it is sent to stack formula vlan port.
If there is not corresponding field in the table, edge bridges 2A is as handling broadcasting user mac frame ground process user mac frame so.
Edge bridges 2A is set to the source trunk MAC Address of user's mac frame for the MAC Address that presets towards the port of backbone network, user oriented port or another edge bridges.
According to destination trunk MAC Address, source trunk MAC Address and service vlan ID, edge bridges 2A is packaged into trunk mac frame form (Figure 20) to user's mac frame.Edge bridges 2A sends to port towards backbone network with the trunk mac frame of encapsulation.
Below explanation is transferred to user's mac frame the operation of stack formula vlan network 4E from backbone network 1.
When user's mac frame was transfused to backbone network 1, user's mac frame was packaged into trunk mac frame form.
Edge bridges 2A receives from the trunk mac frame towards the port 7A of backbone network that is connected to backbone network 1.Edge bridges 2A is with reference to the service vlan ID in the trunk mac frame, and it is set to the service vlan ID of the user's mac frame that is included in the trunk mac frame.
According to service vlan ID, the VLAN ID of user's mac frame and at least one in the MAC Address of destination, table 13A is for example passed in edge bridges 2A search, thereby determines the destination trunk MAC Address that sends and towards the port of backbone network.When the destination of user's mac frame when the front of the stack formula vlan port of edge bridges 2A and edge bridges 2A have known in advance, the result of search is not a destination trunk MAC Address and towards the port of backbone network, but stack formula vlan port.
According in the service vlan ID of user's mac frame part, VLAN ID and the stack formula vlan port at least one, edge bridges 2A search, provider's vlan table 13F for example, thus determine VLAN ID of provider and VLAN ID.
Edge bridges 2A adds the VLAN mark that comprises the VLAN ID of provider to the user mac frame, and it is sent to stack formula vlan port.
If there is not corresponding field in the table, edge bridges 2A is as handling broadcasting user mac frame ground process user mac frame so.
As mentioned above, according to present embodiment, provider/service vlan and VLAN have been changed.Therefore, in the time will being connected to any VLAN that belongs to any service vlan to any VLAN that belongs to any VLAN of provider, do not need its setting (corresponding to claim 23 and 24) for stack formula VLAN edge bridges and edge bridges.
[operating process]
Next, with reference to the example (corresponding to claim 16) of figure 24A and 24B explanation according to the operating process of user's mac frame forwarding method of above-mentioned the 3rd to the 5th embodiment.Figure 24 A shows that user's mac frame according to the edge bridges of the 3rd to the 5th embodiment of the present invention passes on the flow chart of handling (transmit leg).Figure 24 B shows that user's mac frame according to the edge bridges of the 3rd to the 5th embodiment of the present invention passes on the flow chart of handling (recipient).
Figure 24 A shows the processing that pre-determines frame format, and the processing of carrying out when receiving stack formula VLAN frame from stack formula vlan port.Figure 24 B shows the processing of carrying out when receiving from a trunk mac frame towards the port of backbone network.
With reference to figure 24A, when the stack formula VLAN/MAC frame that receives from a stack formula vlan port (step 200: be), according to being included in the VLANID of provider in the stack formula VLAN/MAC frame, having the VLAN ID of user's mac frame of the VLAN ID of provider and at least one in the stack formula vlan port, determine service vlan ID (step 201) corresponding to user's mac frame.
Next, according in service vlan ID, the VLAN ID of provider, VLANID and the destination MAC Address of user's mac frame at least one, determine stack formula vlan port that at least one sends user's mac frame and towards the port (step 202) of backbone network.
When having sent stack formula VLAN/MAC frame from all transmit ports (step 203: be), flow process turns back to step 200.Otherwise (step 203: not), determine that transmit port is port or the stack formula vlan port (step 204) towards backbone network.
Stack formula vlan port (step 204: not), determined to add to the VLAN ID of provider (step 205) of user's mac frame so if transmit port is not towards the port of backbone network.
Add a VLAN mark that comprises the VLAN ID of provider to the user mac frame, to convert user's mac frame to stack formula VLAN frame (step 206).Sent stack formula VLAN frame from port after (step 207), flow process turns back to step 203, with the processing in the repeating step 203 to 208 once more.
On the other hand, if transmit port is a port towards backbone network (step 204: be), so user MAC is encapsulated in the trunk mac frame (step 208).Send the trunk mac frame (step 206) that forms by encapsulation user mac frame from port towards backbone network.Flow process turns back to step 203, with the processing in the repeating step 203 to 208 once more.
With reference to figure 24B, when receiving (step 210), the service vlan ID that is included in the trunk mac frame is set to corresponding to the service vlan ID (step 211) that is included in the user's mac frame in the trunk mac frame from a trunk mac frame towards the port of backbone network.
According in the destination trunk MAC Address of destination MAC Address, VLAN ID and the trunk mac frame of service vlan ID, user's mac frame at least one, determine to send the stack formula vlan port of user's mac frame and towards the port (step 212) of backbone network.
When all transmit ports have sent user's mac frame (step 213: be), flow process turns back to step 210, to carry out the processing up to step 212 once more.Otherwise (step 213: not), determine that transmit port is a port or a stack formula vlan port (step 214) towards backbone network.
If transmit port is not towards the port of backbone network but stack formula vlan port (step 214: not), determined to add to the VLAN ID of provider (step 217) of user's mac frame so.
Add the VLAN mark that comprises the VLAN ID of provider to the user mac frame, to convert user's mac frame to stack formula VLAN/MAC frame (step 216).Sent stack formula VLAN frame from port after (step 217), flow process turns back to step 213, with the processing in the repeating step 213 to 218 once more.
On the other hand, if transmit port is the port (step 214: be) towards backbone network, so user's mac frame is encapsulated into a trunk mac frame (step 215).Send the trunk mac frame (step 216) that forms by encapsulation user mac frame from port towards backbone network.Flow process turns back to step 213, with the processing in the repeating step 203 to 208 once more.
Next, with reference to figure 25A and 25B, another example (corresponding to claim 16 and 17) according to the operating process of user's mac frame forwarding method of above-mentioned the 3rd to the 5th embodiment is described.Figure 25 A shows that another user's mac frame according to the edge bridges of the 3rd to the 5th embodiment of the present invention passes on the flow chart of handling (transmit leg).Figure 25 B shows that another user's mac frame according to the edge bridges of the 3rd to the 5th embodiment of the present invention passes on the flow chart of handling (recipient).
With reference to figure 25A, except the processing shown in Figure 24 A, the trunk mac frame form that edge bridges 2A confirms a reservation comprises the first and second VLAN marks (step 220: be).When receiving from towards the trunk mac frame of the port of backbone network the time (step 221: be), the value that is included in the service vlan ID of the user's mac frame in the trunk mac frame is set to the value of the VLAN ID from a VLAN mark that is included in the trunk mac frame and is included in the value (step 222) that the value of the 2nd VLAN ID in the 2nd VLAN mark produces.
Determine whether that the port towards backbone network sends trunk mac frame (step 223) from one.If the port towards backbone network does not send trunk mac frame (step 223: deny) from one, flow process turns back to step 221 so.If the port towards backbone network sends trunk mac frame (step 223: be) from one, to be included in the value of the VLAN ID in the VLAN mark of trunk mac frame so, with the value that is included in the 2nd VLAN ID in the 2nd VLAN mark, be set to the value (step 224) that produces from the value of the service vlan ID of user's mac frame.Flow process turns back to step 221, repeatedly to carry out the processing (claim 17) up to step 224.
With reference to figure 25B, except the processing shown in Figure 24 B, the trunk mac frame form that edge bridges 2A confirms a reservation comprises a plurality of VLAN marks (step 230: be).Determine whether to receive a trunk mac frame (step 213) from a port towards backbone network.If receive a trunk mac frame (step 231: be), the value that will be included in the service vlan ID of the user's mac frame in the trunk mac frame so is set to the value (step 232) of the value generation of the VLAN ID from a plurality of VLAN marks that are included in the trunk mac frame.
Determine whether to send trunk mac frame (step 233) from port towards backbone network.(step 233: not), flow process turns back to step 231 so if not sending the trunk mac frame from the port towards backbone network.If will be from sending trunk mac frame (step 233: be) towards the port of backbone network, the value that will be included in the VLAN ID in a plurality of VLAN marks of trunk mac frame so be set to the value (step 234) that produces from the value of the service vlan ID of user's mac frame.Flow process turns back to step 231, repeatedly to carry out the processing (claim 18) up to step 234.
[function layout]
Arrange according to the function of the edge bridges of the 3rd to the 5th embodiment of the present invention below with reference to Figure 26 explanation.Figure 26 is the functional-block diagram according to the edge bridges of the 3rd to the 5th embodiment of the present invention.
Except the function of above-mentioned first or second embodiment is arranged (Fig. 1 and 2) or is similarly replaced function arranges, edge bridges 2A according to the 3rd to the 5th embodiment of the present invention also comprises, pass on required functional device as frame, service vlan ID determines device 23A, transmit port is determined device 23B, trunk mac frame generation device 23C, service vlan ID determines device 24A, transmit port is determined device 24B, the VLAN ID of provider determines device 24C and stack formula VLAN/MAC frame generation device 24D (corresponding to claim 16).
Another edge bridges 2A according to the 3rd to the 5th embodiment of the present invention comprises that further frame format condition discriminating apparatus 25A and service vlan ID determine device 25B (corresponding to claim 17).
Another edge bridges 2A according to the 3rd to the 5th embodiment of the present invention comprises that further frame format condition discriminating apparatus 25C and service vlan ID determine device 25D (corresponding to claim 18).
These functional devices can be realized by the information process unit (not shown) with CPU and peripheral circuit thereof.That is, these devices are by reading and carrying out preset program so that hardware and program co-operation realize.These devices can form by the dedicated processes circuit.
Edge bridges 2A comprises the stack formula vlan port 6E and the 6F of transmission/reception stack formula VLAN/MAC frame at least, and the port 7A and the 7B towards backbone network of transmission/reception trunk mac frame.In above-mentioned example shown in Figure 15 (the 3rd embodiment), provide to pass on and shown 13A and fixed value 13B.In the example shown in Figure 16 A and the 17A (the 4th and the 5th embodiment), show also to provide service vlan table 13C or 13G and vlan table 13D the 13A except passing on, or the vlan table 13F of provider.
Service vlan ID determines that device 23A has when the stack formula VLAN/MAC frame that receives from stack formula VALN port, according to comprise in the VLAN ID of provider in the stack formula VLAN/MAC frame, the VLAN ID that has user's mac frame of the VLAN ID of provider, the stack formula vlan port at least one, determine function corresponding to the service vlan ID of user's mac frame.
Transmit port determines that device 23B has at least one in service vlan ID, the VLAN ID of provider, VLAN ID and the destination MAC Address according to user's mac frame, determines to send at least one stack formula vlan port of user's mac frame and towards the function of the port of backbone network.
Trunk mac frame generation device 23C has when determining to send user's mac frame from the port towards backbone network, and user's mac frame is encapsulated into function in the trunk mac frame.
Service vlan ID determines that device 24A has and receiving from towards the trunk mac frame of the port of backbone network the time, is set to function corresponding to the service VALN ID that is included in the user's mac frame in the trunk mac frame with being included in service vlan ID in the trunk mac frame.
Transmit port determines that device 24B has at least one in destination MAC Address, VLAN ID and the destination trunk MAC Address of service vlan ID according to the trunk mac frame, user's mac frame, determines to send at least one stack formula vlan port of user's mac frame and towards the function of the port of backbone network.
The VLAN ID of provider determines that device 24C has when will be when stack formula vlan port sends user's mac frame, according in service vlan ID, VLAN ID and the stack formula vlan port at least one, determine to add to the function of the VLAN ID of provider of user's mac frame.
Stack formula VLAN/MAC frame generation device 24D has the function that user's mac frame is converted to stack formula VLAN/MAC frame by adding the VLAN ID of provider to the user mac frame.
Frame format discriminating device 25A has the function that the predetermined trunk mac frame form of resolution comprises the first and second VLAN marks.
Service vlan ID determines that device 25B has when will be from towards the port transmission/reception trunk mac frame of backbone network the time, the value of the service vlan ID of trunk mac frame is set to the value of a VLAN ID from be included in a VLAN mark and is included in the function of the value that the value of the 2nd VLAN ID in the 2nd VLAN mark produces.
Frame format discriminating device 25C has the function that the predetermined trunk mac frame form of resolution comprises a plurality of VLAN marks.
Service vlan ID determines that device 25D has when will be from one during the port transmission/reception trunk mac frame towards backbone network, the value of the service vlan ID of trunk mac frame is set to the function of the value that the value of a VLAN ID from be included in a plurality of VLAN marks produces.
[program]
Flow process shown in Figure 24 A and the 25A is compiled into a program.The user's mac frame that produces is passed on program exist in the recording medium such as CD-ROM, and be loaded in the computer among the edge bridges 2A.When starting edge bridges 2A, user's mac frame passes on program and is loaded onto in the main storage, and is carried out by computer.In this case, can easily realize the present invention.
[the 6th embodiment]
Next, with reference to Figure 27 explanation user's mac frame forwarding method and edge bridges according to a sixth embodiment of the invention.Figure 27 is the block diagram that shows the layout example of the network that has used user's mac frame forwarding method according to a sixth embodiment of the invention.In Figure 27, with reference number representative identical or similar parts (corresponding to claim 25 to 40) identical among above-mentioned Fig. 1 and 2.
With reference to Figure 27, edge bridges 2A has a plurality of user oriented port 6E and 6F, and a plurality of port 7A and 7B towards backbone network.The quantity of user oriented port 6E and 6F and be to determine as required towards the quantity of the port 7A of backbone network and 7B.Always do not need to provide a plurality of user oriented ports and towards the port of backbone network.In edge bridges 2A, be each bridge or each trunk MAC Address of port assignment in advance towards backbone network.
Edge bridges 2A is connected to user network 4E by user oriented port 6E, be connected to user network 4F by user oriented port 6F, be connected to backbone network 1A by port 7A, be connected to backbone network 1B by port 7B towards backbone network towards backbone network.
Except the function layout or similar replacement function of above-mentioned first to the 5th embodiment, edge bridges 2A also comprises as frame and passes on required functional device, source address is determined device 26A, destination-address is determined device 26B, trunk mac frame generation device 26C and circuit positions are determined device 26D.
These functional devices can be realized by the information process unit (not shown) with CPU and peripheral circuit thereof.That is, these devices are by reading and carrying out preset program so that hardware and program co-operation realize.These devices can be formed by the dedicated processes circuit.
Figure 29 shows the schematic diagram by the form of user's mac frame of the user oriented port transmission/reception of according to a sixth embodiment of the invention edge bridges.
User's mac frame 15A shown in Figure 29 is one user data is encapsulated in by the example in the mac frame of IEEE802.3-202 standard definition.Destination MAC Address 400 indication destination-address.Source MAC 401 indication source addresses.Type i D 402 indicating lengths/type.
Be encapsulated in the type of the MAC customer data of the data in the mac frame by type i D 402 identification conducts.When the value of type i D 402 was 0x0800, the user data 403 of encapsulation was an IPv4 grouping.FCS 404 indication frame check sequences.
Figure 30 is the schematic diagram that shows by the another kind of form of user's mac frame of the user oriented port transmission/reception of according to a sixth embodiment of the invention edge bridges.
User's mac frame 15B shown in Figure 30 is an example that the mark stem of IEEE802.1Q-2003 standard definition is added to user's mac frame 15A.The tag protocol ID of the attribute of type i D 420 sign mark stems (Tag Protocol ID).When the value of type i D 420 was 0x8100, the mark stem was a VLAN mark 412.
A VLAN ID 423 is encapsulated in the VLAN mark 412, thus with VLAN ID mark mac frame.The subclass of the layout of the network that VLAN ID identification is formed by the virtual lan of provider and user locations.Priority level 421 indication user priority grades.CFI 609 indication cannonical format ID.Type i D 413 identifies the type of the data of encapsulation as the type i D shown in Figure 29 402.
Figure 35 is the schematic diagram that the form of trunk mac frame is detected in the loop of using in the edge bridges that shows according to a sixth embodiment of the invention.
Trunk mac frame 15G shown in Figure 35 is an example that encapsulates the trunk frame of mac frame 504 formation by the mac frame with service vlan ID 500 marks.Except maximum frame size be longer than ieee standard definition mac frame maximum length and used the service vlan mark to replace the user vlan mark, this trunk frame is based on the ieee standard shown in Figure 30.
The mac frame 504 of encapsulation can be a mac frame that forms by the user data shown in encapsulation Figure 29 or 30.These are all by type i D 503 signs.Trunk mac frame 15H as shown in Figure 36 is indicated, a plurality of service vlan ID 533 and 537 the trunk frame can be attached to by a plurality of service vlan marks 522 and 523, and user's virtual lan can be offered by a plurality of service vlan ID533 and 537 sign providers.
[operation of the 6th embodiment]
Operation below with reference to Figure 28 explanation edge bridges according to a sixth embodiment of the invention.Figure 28 is that user's mac frame of showing edge bridges according to a sixth embodiment of the invention passes on the flow chart of handling.
Edge bridges 2A receives from port 7A or 7B towards backbone network, the trunk mac frame (step 300) of perhaps user oriented port 6A or 6B.Source address determine device 26A check of distributing to edge bridges 2A single or a plurality of addresses in any one whether with the source address consistent (step 301) of the trunk mac frame that receives.
If two address unanimities (step 301: be) are determined to have produced the loop so in backbone network 1A or 1B.The trunk mac frame of abandoning receiving (step 304).An instruction that shows warning and assay is sent to management devices, and end frame is passed on and is handled the sequence of operating.
If to inconsistent, source address determines that device 26A checks that the source address of the trunk mac frame that receives is a broadcast address or multicast transfer address so by inspection.
If the address unanimity is abandoned the trunk mac frame (step 304) that receives so.An instruction that shows warning and assay is sent to management devices, and end frame is passed on and is handled the sequence of operating.
If arrive inconsistent (step 301: not) by inspection, and edge bridges does not have to carry out passes on towards returning between the port of backbone network, so destination-address determine device 26B check distribute in the single or multiple address of edge bridges 2A any one whether with the destination-address consistent (step 302) of the trunk mac frame that receives.If detect inconsistently, abandon the trunk mac frame (step 304) that receives so, and end frame is passed on the sequence of handling operation.When the address is consistent, carry out to receive and handle (step 303), and end frame is passed on the sequence of handling operation.
Trunk mac frame generation device 26C produces a loop and detects the trunk mac frame, detecting the loop immediately when it produces, and sends loop detection trunk mac frame from port 7A and the 7B towards backbone network.Figure 32 is the schematic diagram that the form of trunk mac frame is detected in the loop of using in the edge bridges that is presented at according to a sixth embodiment of the invention.
In the trunk mac frame 15D shown in Figure 32, a broadcast address or the multicast transfer address of the definition for the loop detects are used as destination MAC Address 450.The trunk MAC Address of the edge bridges that sends or transmission towards the trunk MAC Address of the port of backbone network as source MAC 451.The type of a definition for the loop detects is used as type i D452.User data 453 is options.
Figure 33 is the schematic diagram that the another kind of form of trunk mac frame is detected in the loop of using in the edge bridges that is presented at according to a sixth embodiment of the invention.
In the trunk mac frame 15E shown in Figure 33, a broadcast address or a multicast transfer address of detecting definition for the loop are used as destination MAC Address 460.The trunk MAC Address of the edge bridges that sends is used as source MAC 461.The type of a definition for the loop detects is used as type i D 462.With send towards the port id of the port of backbone network as port id 463.
Figure 34 is the schematic diagram that another form of trunk mac frame is detected in the loop of using in the edge bridges that is presented at according to a sixth embodiment of the invention.
In the trunk mac frame 15F shown in Figure 34, a broadcast address that defines for the loop detects or multicast transfer address are used as destination MAC Address 470.With the trunk MAC Address of the edge bridges that sends or transmission towards the trunk MAC Address of the port of backbone network as source MAC 471.
With one of service LAN that passes on of being provided with in the edge bridges as the service vlan ID 483 and 488 in the service vlan mark 472 and 473.Trunk mac frame generation device 26C is that the trunk mac frame is detected in each the generation loop in all service vlans that are provided with among the edge bridges 2A.The quantity of service vlan mark is not limited to two in the example shown in Figure 34.The type of a definition for the loop detects is used as type i D 474.User data 475 is port ids towards the port of backbone network of choosing wantonly or send.
The trunk mac frame is detected from port 7A and 7B transmission towards backbone network in the loop that trunk mac frame generation device 26C produces.If produced a loop in backbone network, the loop is detected the edge bridges 2A that the trunk mac frame produced this frame and is received so.Source address determines that device 26A carries out above-mentioned check and detects the loop.
When determining in a predetermined period when a plurality of ports receive the trunk mac frame that is defined as the loop, when a trunk MAC Address is distributed to each port towards backbone network, and determined to be confirmed as the loop the trunk mac frame source address with receive the trunk mac frame towards the trunk MAC Address of the port of backbone network not simultaneously, or, trunk mac frame generation device comprises towards the trunk mac frame of the port id of backbone network when producing, and determined to be included in port id in the trunk mac frame that is confirmed as the loop towards backbone network be different from receive the trunk mac frame towards the port of backbone network towards the port id of backbone network the time, circuit positions determines that device 26D determines that the loop may pass through edge bridges.
As mentioned above, according to present embodiment, the source address or the destination-address of edge bridges check trunk mac frame, thus whether identification trunk mac frame is normal.If the trunk mac frame that receives is unusual, abandon the trunk mac frame so.Particularly when source address belongs to the edge bridges that receives this frame, can detect the trunk mac frame and return by the loop.
According to the foregoing description,, can determine the position in loop according to the trunk address, source of the number that receives unusual trunk mac frame, unusual trunk mac frame or towards the port id of backbone network towards the port of backbone network.
The foregoing description only is an example of the present invention.The invention is not restricted to these embodiment, and can carry out various changes and modification, and do not break away from the spirit and scope of the present invention.
As mentioned above, user's mac frame forwarding method according to the present invention is preferably carried out by program control by computer.Also can with the present invention as a kind of it computer-controlled program and the computer readable recording medium storing program for performing of this program of record sell.

Claims (45)

1. user media access control MAC frame forwarding method of carrying out by edge bridges, described edge bridges comprises the port towards backbone network that is used to send/receive the user oriented port of user's mac frame and is used to send/receive the trunk mac frame, wherein be scheduled to a kind of at least one destination trunk MAC Address that comprises, a source trunk MAC Address, a service vlan ID, trunk mac frame form with user's mac frame, be scheduled to and the corresponding one or more service vlan ID of each user oriented port, and only and the corresponding user oriented port of same services VLAN ID between pass on user's mac frame, described method is characterised in that and comprises step:
When the originators edge bridges receives user's mac frame from user oriented port, from corresponding to the service vlan ID that selects the service vlan ID of user oriented port corresponding to user's mac frame;
The VLAN ID that is comprised in this mac frame that receives is made as the VLAN ID of this user's mac frame;
According to the VLAN ID of service vlan ID, user's mac frame and at least one in the MAC Address of destination, determine user oriented port that at least one sends user's mac frame and towards the port of backbone network;
When determining to send user's mac frame from port, user's mac frame is encapsulated in the trunk mac frame towards backbone network;
When terminal point method, edge bridge receives from towards the trunk mac frame of the port of backbone network the time, will be made as the service vlan ID of user's mac frame with the corresponding service vlan ID of the user's mac frame that is included in the trunk mac frame; With
According in the destination trunk MAC Address of the VLAN ID of service vlan ID, the destination MAC Address that is included in the user's mac frame in the trunk mac frame, user's mac frame and trunk mac frame at least one, determine to send the user oriented port of trunk mac frame and towards the port of backbone network.
2. user's mac frame forwarding method according to claim 1, it is characterized in that the trunk mac frame form of being scheduled to comprise a VLAN mark and the 2nd VLAN mark and
This method further comprises step: when will be from towards the port transmission/reception trunk mac frame of backbone network the time, be set to the value of the service vlan ID of trunk mac frame from the value of the first service vlan ID that is included in a VLAN mark and be included in the value that the value of the second service vlan ID the 2nd VLAN mark produces.
3. user's mac frame forwarding method according to claim 1, it is characterized in that the trunk mac frame form of being scheduled to comprise a plurality of VLAN marks and
This method further comprises step: when will be from towards the port transmission/reception trunk mac frame of backbone network the time, the value of the service vlan ID of trunk mac frame be set to the value that the value of the service vlan ID from be included in a plurality of VLAN marks produces.
4. user's mac frame forwarding method according to claim 1, it is characterized in that edge bridges has the service vlan of utilization ID, the VLAN ID of user's mac frame, with in the MAC Address of destination at least one combination as the search key, the search destination trunk MAC Address and the table that passes on towards one of the port of backbone network and set of user oriented port, utilize at least one combination among the VLAN ID of service vlan ID and user's mac frame as the search key, search at least one and pass on table towards the overflow of the port of backbone network and user oriented port, with utilize destination trunk MAC Address as the search key, search towards the port of backbone network towards the port table of backbone network and
This method further comprises step:
When the originators edge bridges receives from towards the trunk mac frame of the port of backbone network the time, as the source trunk MAC Address of trunk mac frame of passing in the table, deposit the destination trunk MAC Address of user's mac frame, described user's mac frame has the service vlan ID as the trunk mac frame of service vlan ID, the VLAN ID that is included in the user's mac frame in the trunk mac frame as VLAN ID, with source MAC as user's mac frame of destination MAC Address
As the port in the port table of backbone network towards backbone network, deposit with have as the trunk frame of the source trunk MAC Address of the trunk mac frame of destination trunk MAC Address corresponding towards backbone network port and
When user's mac frame of receiving from user oriented port, as the user oriented port that passes in showing, deposit and the corresponding user oriented port of user's mac frame, described user's mac frame have as service vlan ID, corresponding to the service vlan ID of user's mac frame, as the VLAN ID of user's mac frame of VLAN ID with as user's mac frame of the source MAC of destination MAC Address.
5. user's mac frame forwarding method according to claim 4 is characterized in that further comprising step:
When the originators edge bridges receives from the trunk mac frame towards the port of backbone network, and the destination trunk MAC Address of trunk mac frame is neither allocate in advance to the user oriented port of edge bridges or towards the MAC Address of the port of backbone network, in the time of neither allocating the MAC Address to edge bridges in advance, utilize destination trunk MAC Address as the search key, search is towards the port table of backbone network, and definite port that sends the trunk mac frame towards backbone network
When the destination of trunk mac frame trunk MAC Address with allocate in advance to the user oriented port of edge bridges or towards the MAC Address of the port of backbone network, with allocate in advance to one in the MAC Address of edge bridges when consistent, utilize service vlan ID, the VLAN ID of user's mac frame, with in the MAC Address of destination at least one combination as the search key, table is passed in search, if and the result of search exists, determine to send the destination trunk MAC Address of trunk mac frame with towards one of the port of backbone network and set of user oriented port
When table is passed in search in this step; And when Search Results does not exist; Utilize among the VLAN ID of service vlan ID and user's mac frame at least one as the search key; Table is passed in the search overflow; If the result of search exists; Determine except receive the trunk mac frame towards the port of core network; At least one sends the user oriented port of trunk mac frame and towards the port of core network; And; If send the trunk mac frame from the port towards core network; Then destination trunk MAC Address is set to a broadcast address
When table is passed in search overflow in this step, and Search Results abandons the trunk mac frame when not existing,
When terminal point method, edge bridge receives user's mac frame from user oriented port, utilize the VLAN ID of service vlan ID, user's mac frame and at least one the combination in the MAC Address of destination to search for and pass on table as the search key, if and Search Results exists, determine to send so the destination trunk MAC Address of user's mac frame with towards one of the port of backbone network and set of user oriented port
When table is passed in search in this step, and when Search Results does not exist, utilize among the VLAN ID of service vlan ID and user's mac frame at least one to search for overflow and pass on table as the search key, if Search Results exists, then determine except the user oriented port that receives user's mac frame, at least one user oriented port, with a port towards backbone network, send user's mac frame, and, if from sending user's mac frame towards the port of backbone network, then destination trunk MAC Address is set to a broadcast address and
When table is passed in search overflow in this step, and Search Results is not when existing, the dropped users mac frame.
6. user's mac frame forwarding method according to claim 1, it is characterized in that further comprising step: when the user's mac frame that receives from user oriented port, and when single service vlan ID correspondence user oriented port, service vlan ID is set to the service vlan ID of user's mac frame.
7. user's mac frame forwarding method according to claim 1, it is characterized in that further comprising step: when will be when user oriented port sends user's mac frame, only corresponding to one among the service vlan ID of user oriented port with transmission user mac frame when consistent corresponding to the service vlan ID of user's mac frame.
8. user's mac frame forwarding method according to claim 1 is characterized in that further comprising step:
When the correspondence of the VLAN ID that has been scheduled to user's mac frame with one-to-many, the single service vlan ID of corresponding and user oriented port or a plurality of service vlan ID be during corresponding the relation,
When the user's mac frame that receives from user oriented port, and a plurality of service vlan ID are during corresponding to this user oriented port, and the service vlan ID that determines user's mac frame is the service vlan ID with the corresponding user oriented port of service vlan ID of user's mac frame.
9. user's mac frame forwarding method according to claim 6 is characterized in that further comprising step:
When be scheduled to for each user oriented port among the VLAN ID of service vlan ID and user's mac frame at least one set and during at least one the transformational relation of set among the VLANID of service vlan ID and user's mac frame,
When the user's mac frame that receives from user oriented port, and when having determined the service vlan ID of user's mac frame by the described method of claim 6, to convert to corresponding at least one the combination among the VLAN ID of the service vlan ID of user oriented port and user's mac frame and user's mac frame predetermined service vlan ID and user's mac frame VLAN ID the two or one of them and
Add the VLAN mark of the VLAN ID of representative of consumer mac frame to the user mac frame.
10. user's mac frame forwarding method according to claim 1 is characterized in that further comprising step:
When be scheduled to for each user oriented port among the VLAN ID of service vlan ID and user's mac frame at least one set and during at least one the transformational relation of set among the VLAN ID of service vlan ID and user's mac frame,
When will be when user oriented port sends user's mac frame, will corresponding to the VLAN ID of the service vlan ID of user oriented port and user's mac frame, user's mac frame and at least one the combination in the MAC Address of destination convert to reservation service VLAN ID and VLAN ID the two or one of them and
When user's mac frame comprises the VLAN mark, and the VLAN ID of definite user's mac frame is when being a value that does not need the VLAN mark be scheduled to, the VLAN mark of cancellation user mac frame.
11. user's mac frame forwarding method according to claim 1 is characterized in that further comprising step:
The set of at least one in VLAN ID, source MAC and the destination MAC Address of being scheduled to service vlan ID, user's mac frame for each user oriented port, and the correspondence that sends or abandon is when concerning,
When user's mac frame of receiving from user oriented port, according to corresponding at least one the combination in VLAN ID, source MAC and the destination MAC Address of the service vlan ID of user's mac frame, user's mac frame, determine to send still dropped users mac frame.
12. user's mac frame forwarding method according to claim 1 is characterized in that further comprising step:
The set of at least one in VLANID, source MAC and the destination MAC Address of being scheduled to service vlan ID, user's mac frame for each user oriented frame, and during the corresponding relation that sends or abandon,
When will be when user oriented port sends user's mac frame, according to corresponding at least one the set in VLAN ID, source MAC and the destination MAC Address of the service vlan ID of user's mac frame, user's mac frame, determining to send still is the dropped users mac frame.
13. user's mac frame forwarding method according to claim 1 is characterized in that further comprising step: be utilized as the source trunk MAC Address that will send to the trunk mac frame of backbone network towards the predetermined MAC Address conduct of the port of backbone network from port towards backbone network.
14. user's mac frame forwarding method according to claim 1, it is characterized in that further comprising step: when being encapsulated into the trunk mac frame, be utilized as the predetermined MAC Address of user oriented port to the user's mac frame that receives from user oriented port as source trunk MAC Address.
15. user's mac frame forwarding method according to claim 1 is characterized in that further comprising step: be utilized as the unique predetermined MAC Address of each edge bridges as the source trunk MAC Address that will send to the trunk mac frame of backbone network from edge bridges.
16. user's mac frame forwarding method according to claim 1, it is characterized in that being scheduled to comprising at least the trunk mac frame form of destination trunk MAC Address, source trunk MAC Address, service vlan ID and user's mac frame, and be scheduled to by the VLAN ID of provider is added to stack formula VLAN/MAC frame format that user's mac frame obtains and
This method further comprises step:
When the stack formula vlan port from edge bridges receives stack formula VLAN/MAC frame, according to being included in the VLAN ID of provider in the stack formula VLAN/MAC frame, having the VLAN ID of user's mac frame of the VLAN ID of provider and at least one in the stack formula vlan port, determine service vlan ID corresponding to user's mac frame
According in the destination MAC Address of the VLAN ID of service vlan ID, the VLAN ID of provider, user's mac frame and user's mac frame at least one, determine to send at least one stack formula vlan port of user's mac frame and towards the port of backbone network,
When determining to send user's mac frame from port towards backbone network, user's mac frame is encapsulated in the trunk mac frame,
When receiving the trunk mac frame from port towards backbone network, the service vlan ID that is included in the trunk mac frame is set to corresponding to the service vlan ID that is included in the user's mac frame in the trunk mac frame,
According in the destination trunk MAC Address of the VLAN ID of the destination MAC Address of service vlan ID, user's mac frame, user's mac frame and trunk mac frame at least one, determine to send the stack formula vlan port of user's mac frame and towards the port of backbone network,
When will be when stack formula vlan port sends user's mac frame, according to the VLAN ID of service vlan ID, user's mac frame and at least one in the stack formula vlan port, determine to add in user's mac frame the VLAN ID of provider and
The VLAN ID of provider is added in user's mac frame, user's mac frame is converted to stack formula VLAN/MAC frame.
17. user's mac frame forwarding method according to claim 16, it is characterized in that the trunk mac frame form of being scheduled to comprise a VLAN mark and the 2nd VLAN mark and
This method further comprises step: when will be from towards the port transmission/reception trunk mac frame of backbone network the time, the value of the service vlan ID of trunk mac frame is set to the value of the first service vlan ID from be included in a VLAN mark and is included in the value that the value of the second service vlan ID in the 2nd VLAN mark produces.
18. user's mac frame forwarding method according to claim 16, it is characterized in that the trunk mac frame form of being scheduled to comprise a plurality of VLAN marks and
This method further comprises step: when will be from towards the port transmission/reception trunk mac frame of backbone network the time, the value of the service vlan ID of trunk mac frame be set to the value that the value of the service vlan ID from be included in a plurality of VLAN marks produces.
19. user's mac frame forwarding method according to claim 16 is characterized in that further comprising step:
When from stack formula VLAN/MAC frame that stack formula vlan port receives, be included in the VLAN ID of provider in the stack formula VLAN/MAC frame add to corresponding to predetermined portions of the service vlan ID of the user's mac frame that has the VLAN ID of provider and
A predetermined value is set to predetermined portions corresponding to the service vlan ID of user's mac frame.
20. user's mac frame forwarding method according to claim 16, it is characterized in that further comprising step: when will be when stack formula vlan port sends user's mac frame, the predetermined portions corresponding to the service vlan ID of user's mac frame be set to the VLAN ID of provider that adds user's mac frame to.
21. user's mac frame forwarding method according to claim 16, it is characterized in that edge bridges has the VLAN ID that utilizes the VLAN ID of provider, user's mac frame and at least one the combination in the stack formula vlan port come search service VLAN ID as the search key service vlan ID search list
This method further comprises step:
When receiving stack formula VLAN/MAC frame from stack formula vlan port, be set to predetermined portions with being included in the VLAN ID of provider in the stack formula VLAN/MAC frame corresponding to the service vlan ID of the user's mac frame that has the VLAN ID of provider,
Utilize the VLAN ID of the VLAN ID of provider, user's mac frame and in the stack formula vlan port at least one combination as the search key come search service VLAN ID search list and
This Search Results is made as corresponding to the part beyond the predetermined portions of the service vlan ID of user's mac frame.
22. user's mac frame forwarding method according to claim 16, it is characterized in that edge bridges have the VLAN ID of a part of utilizing service vlan ID, user's mac frame and at least one the combination in the stack formula vlan port come as the search key search subscriber mac frame VLAN ID VLAN ID search list and
This method further comprises step:
When will be when stack formula vlan port sends user's mac frame, with corresponding to the predetermined portions of the service vlan ID of user's mac frame as the VLAN ID of provider that adds user's mac frame to,
Utilize service vlan ID predetermined portions, user's mac frame VLAN ID and in the stack formula vlan port at least one combination as the search key search for VLAN ID search list and
According to this Search Results, determine to add to the VLAN ID in user's mac frame.
23. user's mac frame forwarding method according to claim 16, it is characterized in that edge bridges has the VLAN ID that utilizes the VLAN ID of provider, user's mac frame and at least one the combination in the stack formula vlan port comes search service VLAN ID search list as the search key, with the VLAN ID of search service VLAN ID and user's mac frame and
This method further comprises step:
When receiving stack formula VLAN/MAC frame from stack formula vlan port, utilization is included in the VLAN ID of provider in the stack formula VLAN/MAC frame, have the VLAN ID of provider user's mac frame VLAN ID and in the stack formula vlan port at least one combination as the search key come search service VLAN ID search list and
According to this Search Results, the service vlan ID that determines to add the service vlan ID of described trunk mac frame to and add this user's mac frame to.
24. user's mac frame forwarding method according to claim 16, it is characterized in that edge bridges has the VLAN ID that utilizes service vlan ID, user's mac frame and at least one the combination in the stack formula vlan port is searched for the VLAN ID of provider search list as the search key, with the VLAN ID of search the VLAN ID of provider and user's mac frame and
This method further comprises step: when will be when stack formula vlan port sends user's mac frame, utilize the VLAN ID of service vlan ID, user's mac frame of user's mac frame and at least one the combination in the stack formula vlan port to search for the VLAN ID of provider search list, to determine to be included in the VLAN ID of provider in the stack formula VLAN/MAC frame and the VLAN ID of user's mac frame as the search key.
25. user's mac frame forwarding method according to claim 1, it is characterized in that in advance to edge bridges distribute one or more trunk MAC Address and
During this method further may further comprise the steps one or two:
When receiving the trunk mac frame,
Whether the source trunk MAC Address of check trunk mac frame is consistent with in a single presumptive address or a plurality of presumptive address any one, or with single presumptive address or a plurality of presumptive address in any one is all inconsistent, with when the assay indication is consistent, determine that the trunk mac frame is a unusual mac frame, and abandon the trunk mac frame and
Whether the destination trunk MAC Address of check trunk mac frame is consistent with in a single presumptive address or a plurality of presumptive address any one, or with single presumptive address or a plurality of presumptive address in any one is all inconsistent, with when the assay indication is consistent, determine that the trunk mac frame is a unusual mac frame, and abandon the trunk mac frame.
26. user's mac frame forwarding method according to claim 25 is characterized in that further comprising step:
When receiving the trunk mac frame from port towards backbone network,
The source trunk MAC Address of check trunk mac frame whether with allocate in advance in the trunk MAC Address of edge bridges any one consistent and
When the assay indication is consistent, determines that the trunk mac frame is a unusual mac frame, and abandon the trunk mac frame.
27. user's mac frame forwarding method according to claim 26 is characterized in that further comprising step:
When port towards backbone network of assay indication has received unusual mac frame in predetermined period, then determine edge bridges outside the loop and
When a plurality of ports towards backbone network received unusual mac frame in predetermined period, edge bridges may be passed through in then definite loop.
28. user's mac frame forwarding method according to claim 26 is characterized in that in edge bridges, for each towards the predetermined single trunk MAC Address of the port of backbone network and
This method further comprises step:
When the source address that shows unusual mac frame through check is consistent with the trunk MAC Address of being scheduled to for the port towards backbone network that receives unusual mac frame, determine edge bridges outside the loop and
When the address is inconsistent, determine that the loop may pass through edge bridges.
29. user's mac frame forwarding method according to claim 25 is characterized in that further comprising step:
When receiving the trunk mac frame from port towards backbone network,
The source trunk MAC Address of check trunk mac frame whether be one of multicast address and broadcast address and
When the assay indication is affirmed, determine that the trunk mac frame is a unusual mac frame, and abandon the trunk mac frame.
30. user's mac frame forwarding method according to claim 25 is characterized in that further comprising step:
When receiving the trunk mac frame from port towards backbone network,
Whether check is carried out towards the loopback between the port of backbone network and is passed on,
When not carrying out described loopback when passing on, the destination trunk MAC Address of check trunk mac frame whether be a clean culture transfer address of not distributing to edge bridges and
When described destination trunk MAC Address is the clean culture transfer address, determines that the trunk mac frame is a unusual mac frame, and abandon the trunk mac frame.
31. user's mac frame forwarding method according to claim 25 is characterized in that in edge bridges, a predetermined single trunk MAC Address and
This method further comprises step: from preestablishing all ports towards backbone network of transmission, according to foregone conclusion spare, with preset time at interval, or, periodically send the trunk mac frame that has one destination trunk MAC Address in broadcast address of being set to and the predetermined multicast address and be set to the source trunk MAC Address of trunk MAC Address predetermined in the edge bridges with any timing corresponding to the gerentocratic instruction of edge bridges.
32. user's mac frame forwarding method according to claim 25 is characterized in that in edge bridges, for each towards the predetermined single trunk MAC Address of the port of backbone network and
This method further comprises step: from setting in advance all ports towards backbone network of transmission, according to foregone conclusion spare, with preset time at interval, or, periodically send to have one destination trunk MAC Address in broadcast address of being set to and the predetermined multicast address and be set to and be trunk mac frame towards the source trunk MAC Address of the predetermined trunk MAC Address of the port of backbone network with any timing corresponding to the gerentocratic instruction of edge bridges.
33. user's mac frame forwarding method according to claim 25 is characterized in that in edge bridges, predetermined single trunk MAC Address,
For each towards the port of backbone network predetermined in advance one towards the port id of backbone network and
This method further comprises step: from setting in advance all ports towards backbone network of transmission, according to foregone conclusion spare, with preset time at interval, or with arbitrary timing corresponding to the gerentocratic instruction of edge bridges, periodically send the source trunk MAC Address have one destination trunk MAC Address in broadcast address of being set to and the predetermined multicast address and to be set to trunk MAC Address predetermined in the edge bridges, and be included as the predetermined trunk mac frame of the port towards backbone network of transmission towards the port id of backbone network.
34. user's mac frame forwarding method according to claim 31 is characterized in that in edge bridges, predetermined one or more service vlan ID that will pass on by edge bridges itself and
This method further comprises step: send the trunk mac frame with service vlan ID, this service vlan ID is as the service vlan ID of each service vlan ID.
35. user's mac frame forwarding method according to claim 25, it is characterized in that further comprising step: in check, determine to exist the loop of a service vlan ID from be included in unusual mac frame to a service vlan of this service vlan ID indication.
36. user's mac frame forwarding method according to claim 25 is characterized in that further comprising step:
When check show be included in the unusual mac frame towards the port id of backbone network with for receive unusual mac frame towards the predetermined port id of the port of backbone network when consistent towards backbone network, determine edge bridges outside the loop and
When towards the port id of backbone network when inconsistent, determine that the loop may pass through edge bridges.
37. user's mac frame forwarding method according to claim 25 is characterized in that further comprising step:
When the trunk mac frame is defined as unusual mac frame,
Close the port that some or all receive the trunk mac frame towards backbone network.
38. user's mac frame forwarding method according to claim 25 is characterized in that further comprising step:
When definite trunk MAD frame is unusual mac frame,
Reduction will be from one of the priority level of some or all trunk mac frames that send towards the port of backbone network of receiving the trunk mac frame and frequency band.
39. user's mac frame forwarding method according to claim 25 is characterized in that further comprising step:
When definite trunk mac frame is unusual mac frame,
The warning that receives unusual trunk mac frame is presented on the management devices of edge bridges.
40. user's mac frame forwarding method according to claim 25 is characterized in that further comprising step:
When definite trunk mac frame is unusual mac frame,
The warning that the loop is produced is presented on the management devices of edge bridges,
The quantity towards the port of backbone network that receives unusual mac frame is presented on the management devices,
When a port towards backbone network receives unusual mac frame, show on the management devices edge bridges outside the loop and
When a plurality of ports towards backbone network received unusual mac frame, show circuit may pass through edge bridges on management devices.
41. the edge bridges of a system, wherein be scheduled to comprise the trunk mac frame form of at least one destination trunk MAC Address, a source trunk MAC Address, a service vlan ID and user's mac frame, with be scheduled to one or more service vlan ID corresponding to each user oriented port, it is characterized in that comprising:
The port that is used to send/receive the user oriented port of user's mac frame and is used to send/receive the trunk mac frame towards backbone network;
Storage device, be used for memory by using service vlan ID, the VLAN ID of user's mac frame, search for destination trunk MAC Address with at least one the combination in the MAC Address of destination as the search key and towards the table that passes on of one of the port of backbone network and set of user oriented port, utilize at least one combination among the VLAN ID of service vlan ID and user's mac frame to search at least one and pass on table and utilize destination trunk MAC Address as the close port table that comes the key search towards the port of backbone network of search towards backbone network towards the overflow of the port of backbone network and user oriented port as the search key; With
Device, be used for by each table with reference to this storage device, be saved in trunk mac frame corresponding to the service vlan ID identical with the user's mac frame that receives by user oriented port, send from port towards backbone network corresponding to this service vlan ID, and user's mac frame of being preserved the trunk mac frame that will receive from the port towards backbone network, send from user oriented port corresponding to the service vlan ID identical with this trunk mac frame.
42. according to the described edge bridges of claim 41, it is characterized in that being scheduled to comprising at least the trunk mac frame form of destination trunk MAC Address, source trunk MAC Address, service vlan ID and user's mac frame, with be scheduled to by the VLAN ID of provider is added to stack formula VLAN/MAC frame format that user's mac frame obtains and
This edge bridges further comprises:
Be used for when receiving stack formula VLAN/MAC frame from stack formula vlan port, according to being included in the VLAN ID of provider in the stack formula VLAN/MAC frame, having the VLAN ID of user's mac frame of the VLAN ID of provider and at least one in the stack formula vlan port, determine first device corresponding to the service vlan ID of user's mac frame
Be used at least one according to the destination MAC Address of the VLAN ID of service vlan ID, the VLAN ID of provider, user's mac frame and user's mac frame, determine to send at least one stack formula vlan port of user's mac frame and towards second device of the port of backbone network
Be used for when having determined to send user's mac frame, user's mac frame be encapsulated into the 3rd device in the trunk mac frame from port towards backbone network,
Be used for when receiving the trunk mac frame, be set to the 4th device corresponding to the service vlan ID that is included in the user's mac frame in the trunk mac frame with being included in service vlan ID in the trunk mac frame from port towards backbone network,
At least one of destination trunk MAC Address that is used for the VLAN ID of destination MAC Address, user's mac frame and trunk mac frame according to service vlan ID, user's mac frame, determine to send the stack formula vlan port of user's mac frame and towards the 5th device of the port of backbone network
Be used for will be when stack formula vlan port sends user's mac frame, according to the VLAN ID of service vlan ID, user's mac frame and at least one in the stack formula vlan port, determine to add to user's mac frame the VLAN ID of provider the 6th device and
Be used for adding the VLAN ID of provider to the user mac frame, user's mac frame is transformed into the 7th device of stack formula VLAN/MAC frame.
43., it is characterized in that further comprising according to the described edge bridges of claim 42:
Be used to differentiate predetermined trunk mac frame form comprise a VLAN mark and the 2nd VLAN mark device and
Be used for will be from the time, the value of the service vlan ID of trunk mac frame be set to the value of the first service vlan ID from be included in a VLAN mark and be included in the device of the value that the value of the second service vlan ID in the 2nd VLAN mark produces towards the port transmission/reception trunk mac frame of backbone network.
44., it is characterized in that further comprising according to the described edge bridges of claim 42:
Be used to differentiate predetermined trunk mac frame form comprise a plurality of VLAN marks device and
Be used for will be from the time, the value of the service vlan ID of trunk mac frame be set to the device of the value that the value of the service vlan ID from be included in a plurality of VLAN marks produces towards the port transmission/reception trunk mac frame of backbone network.
45. according to the described edge bridges of claim 41, it is characterized in that being scheduled to comprising at least the trunk mac frame form of destination trunk MAC Address, source trunk MAC Address, service vlan ID and user's mac frame,
In advance to edge bridges distributed one or more trunk MAC Address and
Edge bridges comprises that further the source trunk MAC Address that is used for checking the trunk mac frame is whether consistent with any one of a single or multiple predetermined address, or with single presumptive address or a plurality of presumptive address in any one is all inconsistent, and when the assay indication is consistent, determine that trunk MAC is unusual mac frame, and abandon the device of trunk mac frame.
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