CN101515880A - Method and equipment for providing Ethernet service on network based on resilient packet ring - Google Patents
Method and equipment for providing Ethernet service on network based on resilient packet ring Download PDFInfo
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- CN101515880A CN101515880A CNA2008100098697A CN200810009869A CN101515880A CN 101515880 A CN101515880 A CN 101515880A CN A2008100098697 A CNA2008100098697 A CN A2008100098697A CN 200810009869 A CN200810009869 A CN 200810009869A CN 101515880 A CN101515880 A CN 101515880A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
- H04L12/462—LAN interconnection over a bridge based backbone
- H04L12/4625—Single bridge functionality, e.g. connection of two networks over a single bridge
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/437—Ring fault isolation or reconfiguration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
- H04L12/4645—Details on frame tagging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2212/00—Encapsulation of packets
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Abstract
The invention relates to metropolitan area network multiservice transmission technology, in particular to a method and equipment for providing Ethernet service on the network based on a resilient packet ring. According to the invention, the method for realizing Ethernet service in the resilient packet ring comprises the following steps that: a resilient packet ring frame comprising service identification information and an Ethernet frame is generated on a node; the service identification information is used for identifying a service stream which the Ethernet frame belongs to; the resilient packet ring frame is sent by the resilient packet ring; and according to the service identification information, target user equipment for receiving the Ethernet frame is determined on at least one other node. According to the embodiment, the method adopts a service marker in a MPLS format to identify different service streams, thereby realizing the Ethernet service in RPR network in a uniform mode. In addition, as corresponding relationship between attributes of a temporary VLAN label, the service marker and the service stream is prestored in a list form, the resilient packet ring frame can be conveniently encapsulated and decapsulated.
Description
Technical field
The present invention relates to metropolitan area multi-service tranmission techniques, relate in particular to the method and apparatus that Ethernet service is provided on the network based on Resilient Packet Ring (RPR).
Background technology
RPR is a kind of optical fiber ring network medium access control (MAC) technology towards the metropolitan area transmitted in packets, because it has packet optimization transmission, can realize functions such as Packet Service statistic multiplexing, professional CoS (classify traffic) transmission, professional space-domain multiplexing and the automatic discovery of ring network topology information, so in the metropolitan area transmitted in packets, be widely adopted.The detailed description of relevant RPR technology can be referring to IEEE 802.17 standard criterions, these technical literatures this in full way of reference comprise in this manual.
RPR must could constitute complete metropolitan area network (MAN) application solution of a cover in conjunction with other technologies as MAC layer technology.In current metropolitan area network field, Ethernet has been one of the most popular technical solution, and in fact, Ethernet service is implemented in current a lot of operations commercial city on metropolitan area network.For example, for the carrier-class Ethernet service is provided in the metropolitan area scope, Metro Ethernet Forum (MEF) has defined the professional and professional two kinds of business models of E-LAN of E-LINE, and wherein, the E-LINE business refers to provide between two User Network Interfaces (UNI) Ethernet of point-to-point to connect professional; E-LAN refers to provide between two or more UNI multiple spot to connect business to the Ethernet of multiple spot, to realize the forwarding of clean culture, multicast and broadcast frame.Detailed description professional about E-LINE and the E-LAN business can be referring to the relevant criterion of MEF formulation, these technical literatures this in full way of reference comprise in this manual.
Therefore, need a kind of technical scheme that various Ethernet services are provided in the network that adopts the networking of RPR technology.
Summary of the invention
An object of the present invention is to provide a kind of method that realizes Ethernet service in Resilient Packet Ring, this purpose can be realized by following technical proposal:
A kind of method that in Resilient Packet Ring, realizes Ethernet service, a plurality of subscriber equipmenies may further comprise the steps in node inserts described Resilient Packet Ring:
A described node place generates the Resilient Packet Ring frame that comprises service identification information and ethernet frame therein, and described service identification information is used to identify the affiliated Business Stream of described ethernet frame;
Send described Resilient Packet Ring frame through described Resilient Packet Ring; And
Other described node place at least one is according to the definite described subscriber equipment that receives described ethernet frame of described service identification information.
Preferably, in said method, described service identification information comprises service marker, and generates described Resilient Packet Ring frame according to following manner:
Interim VLAN label according to described ethernet frame is determined described service marker; And
Described service marker and ethernet frame are encapsulated in the described Resilient Packet Ring frame.
Preferably, in said method, determine to receive the described subscriber equipment of described ethernet frame by described service identification information according to following manner:
Determine described interim VLAN label according to the described service marker in the described Resilient Packet Ring frame; And
Determine to receive the described subscriber equipment of described ethernet frame according to described interim VLAN label.
Preferably, in said method, described Business Stream carrying E-LINE business or E-LAN business.
Preferably, in said method, the attribute of described service marker and described Business Stream is that index is stored in first tabulation with described interim VLAN label, and the corresponding relation of described interim VLAN label and described service marker is stored in second tabulation.
Preferably, in said method, described service marker meets the Multi-Protocol Label Switch (MPLS) form.
Preferably, in said method, described Resilient Packet Ring frame generates by insert described service marker between the protocol type of the Resilient Packet Ring expansion frame of following the IEEE802.17 standard and Service Data Unit, and described ethernet frame is mapped to described Service Data Unit.
Preferably, in said method, by described ethernet frame is categorized as different Business Streams according at least a in the following message, make each described ethernet frame corresponding: the interface port of the VLAN label of described ethernet frame, VLAN priority and described subscriber equipment and Resilient Packet Ring with a Business Stream.
Preferably, in said method, described interim VLAN label and described VLAN label are followed IEEE 802.1Q/D standard.
Another object of the present invention provides a kind of equipment of realizing Ethernet service in Resilient Packet Ring.
For realizing this goal of the invention, the said equipment comprises:
The Ethernet access unit links to each other to receive and to send ethernet frame with one or more subscriber equipmenies;
The medium access control unit, the link that inserts described Resilient Packet Ring is to send and to receive the Resilient Packet Ring frame; And
Ethernet-Resilient Packet Ring bridge unit, link to each other with described medium access control unit with described Ethernet access unit, be used for described Ethernet access unit is encapsulated as the Resilient Packet Ring frame from the described ethernet frame that described subscriber equipment receives, with described medium access control unit is descapsulated into described ethernet frame from the described Resilient Packet Ring frame that the link of described Resilient Packet Ring receives, described Resilient Packet Ring frame comprises service identification information and described ethernet frame, and described service identification information is used to identify the affiliated Business Stream of described ethernet frame.
Preferably, in the said equipment, described medium access control unit is when receiving described Resilient Packet Ring frame, if determine described Business Stream carrying E-LINE business according to described service identification information, then remove described Resilient Packet Ring frame from described Resilient Packet Ring, if determine described Business Stream carrying E-LAN business according to described service identification information, then duplicate described resilient packet ring frame.
Of the present invention also have a purpose to provide a kind of RPR network that Ethernet service is provided, and comprises twin nuclei, and described twin nuclei comprises link and inserts a plurality of nodes of described link,
Wherein, each described node comprises:
The Ethernet access unit links to each other to receive and to send ethernet frame with one or more subscriber equipmenies;
The medium access control unit inserts described link to send and to receive the Resilient Packet Ring frame; And
Ethernet-Resilient Packet Ring bridge unit, link to each other with described medium access control unit with described Ethernet access unit, be used for described Ethernet access unit is encapsulated as the Resilient Packet Ring frame from the described ethernet frame that described subscriber equipment receives, with described medium access control unit is descapsulated into described ethernet frame from the described Resilient Packet Ring frame that described link receives, described Resilient Packet Ring frame comprises service identification information and described ethernet frame, and described service identification information is used to identify the affiliated Business Stream of described ethernet frame.According to embodiments of the invention, adopt service marker to identify different Business Streams, that is, the Frame of E-LINE business and the Frame that belongs to different E-LAN territory all can be distinguished by service marker, have realized Ethernet service with uniform way thus in the RPR net.In addition, according to embodiments of the invention,, the encapsulation and the decapsulation of Resilient Packet Ring frame have therefore been made things convenient for owing to can the tabulation mode corresponding relationship between attributes of interim VLAN label, service marker and Business Stream be stored in advance.
Description of drawings
Below by preferred embodiment and accompanying drawing the present invention is done to set forth more fully, wherein:
Fig. 1 is the schematic diagram according to the Resilient Packet Ring frame of a preferred embodiment of the present invention;
Fig. 2 is the RPR Line cards configuration diagram that Ethernet service is provided according to another preferred embodiment of the present invention;
Fig. 3 is for to transmit schematic diagram according to the inlet of another preferred embodiment of the present invention;
Fig. 4 utilizes inlet shown in Figure 3 to transmit the flow chart of encapsulation RPR frame;
Fig. 5 is for to transmit schematic diagram according to the outlet of another preferred embodiment of the present invention;
Fig. 6 utilizes outlet shown in Figure 4 to transmit the flow chart of decapsulation RPR frame;
Fig. 7 is the process chart of the MAC unit in the RPR Line cards shown in Figure 2;
Fig. 8 is the schematic diagram according to the E-LINE business that realizes in the RPR network of another embodiment of the present invention; And
Fig. 9 is the schematic diagram according to the E-LAN business that realizes in the RPR network of another embodiment of the present invention.
Embodiment
In the present invention, a Business Stream refers to has message or the frame that certain class can be identified feature, therefore can adopt certain classifying rules that message or frame are referred to different Business Streams.For example, can classify according to the attributes such as VLAN label, priority or access interface of ethernet frame, in addition, can also utilize other attribute or feature that ethernet frame is classified, for example the information of network layers such as port numbers of IP agreement, source address, destination address, application program (layer 3) and transport layer (layer 4).
According to embodiments of the invention, different Business Streams are distinguished with service identification information, when realizing that in based on the network of RPR E-LINE business and E-LAN are professional, can utilize service identification information to identify to belong to the Frame in different E-LAN territory and different UNI between the E-LINE business, in the RPR network, realize Ethernet service thus with uniform way.
Above-mentioned service identification information can have various forms, as long as can distinguish different Business Streams.For example in one embodiment, Business Stream and the level and smooth MPLS of support encapsulation and agreement in order to represent a greater number can adopt the service marker of following the MPLS form.Fig. 1 is that this figure right half part shows the concrete structure of service marker Service Label according to the schematic diagram of the Resilient Packet Ring frame of preferred embodiment of the present invention.As shown in Figure 1, preceding 20 bits of this service marker are represented traffic identification sign indicating number Service-ID, and preceding 16 bits wherein are used to represent maximum 65536 different Business Streams, and back 4 bits are used for expansion for keeping the position; 3 bits subsequently are the CoS territory, are used to represent the attribute relevant with service quality, for example below will make the priority value of the interim VLAN label of description; Storehouse label S occupies 1 bit, but for example value is 0; TTL occupies 8 last bits.
According to embodiments of the invention, in order in the RPR network, to provide Ethernet service, can ethernet frame be encapsulated in the RPR frame according to following manner, promptly, as shown in Figure 1, expand in the frame at a RPR who follows IEEE 802.17 standards, ethernet frame is mapped as Service Data Unit Payload, the target MAC (Media Access Control) address and the source MAC of this frame are mapped to DaExtend territory and SaExtend territory respectively, and insert service marker Service Label between protocol type ProtocolType in this RPR expansion frame and the Service Data Unit Payload.When encapsulation, the Frame Check Sequence of ethernet frame is rejected, and the Frame Check Sequence territory FCS in the RPR frame shown in Figure 1 draws according to the data computation of DaExtend territory to the Payload territory.
Above-mentioned packaged type makes E-LINE business and E-LAN business to define in the mode of RPR Business Stream, thereby realizes that to the unified management of Ethernet service on each access point, for example Ethernet exchanges configuration, bridge configuration and RPR attribute configuration etc.
Be example is described provides Ethernet service according to aforesaid way of the present invention RPR node device with the RPR Line cards below, in this manual, unless specialize, RPR node and RPR node device can exchange use.
Fig. 2 is the RPR Line cards configuration diagram that Ethernet service is provided according to a preferred embodiment of the present invention.As shown in Figure 2, this RPR Line cards comprises Ethernet access unit 21, Ethernet-RPR bridge unit 22 and medium access control (MAC) unit 23.
In the following description, be defined as Way in from the local ethernet interface to Ethernet access unit 21 and the direction of Ethernet-RPR bridge unit 22, Way out is defined as the direction from Ethernet-RPR bridge unit 22 to Ethernet access unit 21 and local ethernet interface.
Ethernet access unit 21 can link to each other with one or more local subscriber apparatus by local interface 24, to realize the exchanges data between Resilient Packet Ring and the Ethernet.Here, subscriber equipment can be various ethernet devices, for example includes but not limited to Ethernet switch and ethernet local area network etc.
When Ethernet access unit 21 is receiving the ethernet frame that local subscriber apparatus sends on the Way in after, according to certain rule the ethernet frame union of classifying is bonded in the corresponding business stream, concrete rule is by the application scenario decision, for example can classify to traffic frame according to a kind of in the following attribute or one group: the local access interface of Ethernet access unit 21, the VLAN label of ethernet frame and VLAN priority.
After ethernet frame was classified, Ethernet access unit 21 will add an interim VLAN label representing the Business Stream under it at the front end of each ethernet frame, and no matter whether this ethernet frame has included the VLAN label.Interim VLAN label can adopt the form identical with the VLAN label, is made of the CFI territory of the VLAN Priority territory of 3 bits, 1 bit and the VLAN ID territory of 12 bits.The specific descriptions of above-mentioned label can be referring to IEEE 802.1Q/D standard, and document way of reference in full comprises in this manual.
Be transferred into Ethernet-RPR bridge unit 22 through the ethernet frame after the above-mentioned processing through bridge interface shown in Figure 2 25.
On the other hand, when Ethernet access unit 21 on the Way out after bridge interface 25 receives the ethernet frame that Ethernet-RPR bridge unit 22 sends, determine corresponding local port according to interim VLAN label, and this ethernet frame is sent to the purpose subscriber equipment through determined local port.
Except realizing above-mentioned functions, Ethernet access unit 21 is also implemented processing such as shaping, supervision and counting to Business Stream.
Ethernet access unit 21 with above-mentioned functions can have multiple implementation, for example can utilize commercial layer 2 exchange chip or network processes chip to realize, also can realize by the mode of operation dedicated program on all-purpose computer.
The ethernet frame that Ethernet-RPR bridge unit 22 sends Ethernet access unit 21 on Way in is packaged in the RPR frame shown in Figure 1 and through internal interface 26 and is sent to MAC unit 23, and the RPR frame deblocking that on Way out MAC unit 23 is sent is ethernet frame and is sent to Ethernet access unit 21 through bridge interface 25.
Below describe a kind of concrete method for packing, this method has been stored with tabular form and has been generated the required parameters of RPR frame, and these parameters are that index is preserved with interim VLAN label (VLAN ID territory that promptly wherein comprises and VLAN Priority territory).Fig. 3 exemplarily shows the structure of such table (transmitting or the IFT table hereinafter referred to as inlet).
In IFT shown in Figure 3 table, in the interim VLAN label VLAN ID and VLANPriority constitute index, hardware logic can be determined the row address of respective record in random access storage device (RAM) according to index value.For example, if the initial address of IFT table is 0X0000, for VLAN ID and VLAN Priority respectively value be 100 and 1 record, suppose that the length of each IFT table row is 64, then the row address of these clauses and subclauses is 0X0000+[100 (VLAN) * 8+1 (Priority)] * 8=0X1908.Because each port can have 4096 VLAN at most, each VLAN has 8 priority, so the IFT table amounts to can 32768 records.
Fig. 4 is the flow chart that utilizes above-mentioned IFT gauge seal dress RPR frame.
As shown in Figure 4, in step 41, from ethernet frame, extract VLAN ID and VLAN Priority in the interim VLAN label.Then, in step 42, utilize hardware logic to calculate the physical address of respective record.Subsequently, in step 43, in the IFT table, search relative recording according to the physical address that calculates in the step 42.Then, in step 44, judge whether to find the record that is complementary, if do not find, then enter step 45, abandon ethernet frame, otherwise, enter step 46, the parameter maps in the record that will be complementary is mapped into the Payload territory to the RPR frame and with ethernet frame, particularly, Node ID is mapped to the destination-mac address in the RPR frame shown in Figure 1, ring selection is mapped to the RI in the RPR frame base control territory, and TTL0 and TTL1 are mapped to the TTL in the RPR frame, and Service-ID is mapped to the Service-ID in the RPR frame Service Label.At last, in step 47, send the RPR frame to MAC unit 23.
Below describe a kind of concrete de-encapsulation method, this method has been stored with tabular form and extracted the required parameters of ethernet frame from the RPR frame, and these parameters are that index is preserved with Service-ID.Fig. 5 exemplarily shows the structure of such table (transmitting or the EFT table hereinafter referred to as outlet).
In EFT table shown in Figure 5, hardware logic can be determined the row address of respective record in random access storage device (RAM) according to the value of index Service-ID.
Fig. 6 is the flow chart that utilizes above-mentioned EFT tabulation encapsulation RPR frame.
As shown in Figure 6, in step 61, from the Service Label territory of RPR frame, extract Service-ID.Then, in step 62, utilize hardware logic to calculate the physical address of respective record.Subsequently, in step 63, in the EFT table, search relative recording according to the physical address that calculates in the step 62.Then, in step 64, judge whether to find the record that is complementary, if do not find, then enter step 65, abandon the RPR frame, otherwise, enter step 66, in the RPR frame, extract ethernet frame, and the interim VLAN label that is complementary is added to the front end of this ethernet frame.At last, in step 67, send the ethernet frame that has added interim VLAN label to Ethernet access unit 21.
MAC unit 23 comprises the east mouth and western port, links to each other with the east mouth with the western port of the MAC unit of adjacent two websites respectively.The MAC layer function of IEEE 802.17 standard definitions can be realized in the MAC unit, includes but not limited to the medium access control of RPR frame, RPR priority queueing management, RPR business arrangement and the processing of RPR traffic congestion etc.
On Way in, rank the RPR frame that Ethernet-RPR bridge unit 22 sends and send on the link of Resilient Packet Ring in MAC unit 23.
On the other hand, on Way out, MAC unit 23 receives according to following manner and handles the RPR frame that transmits on the Resilient Packet Ring link, sends to Ethernet-RPR bridge unit 22 then.Particularly, as shown in Figure 7, in step 71, MAC unit 23 extracts the DA territory to obtain MAC Address from the RPR frame.Then in step 72, judge according to the MAC Address of extracting whether this node is the node that receives this RPR frame.If not, then enter step 73, send this RPR frame through the adjacent node of chain road direction, otherwise enter step 74.In step 74, the Service-ID that MAC unit 23 extracts in the RPR frame.Then in step 75, be worth and judge type of service according to extraction.If determining type of service is E-LINE, then enter step 76, carry out data and reject operation, with the RPR frame from encircling removal.If type of service is E-LAN, then enter step 77, carry out ring operation under the data, promptly duplicate the RPR frame and send this RPR frame to adjacent node through the link continuation.At last, in step 78, MAC unit 23 sends the RPR frame to Ethernet-RPR bridge unit 22.
In the above among the embodiment of Miao Shuing, interim VLAN label is used to the different Business Stream of sign in the Ethernet access unit, and Service-ID is used to the different Business Stream of sign in elastic packet loop network, and the mapping between the two can utilize Table I FT and table EFT to realize.Therefore, interim VLAN label and Service-ID all can be considered the service identification information of identification service stream.
Fig. 8 is the schematic diagram according to the E-LINE business that realizes in the RPR network of another embodiment of the present invention.
In embodiment as shown in Figure 8, the twin nuclei that the RPR network using is made of subring 1 and subring 2, each subring comprises four RPR node 811-814 and node is interconnected at together one way link with ring-type, and each node adopts the RPR Line cards of structure shown in Figure 2 to realize the function of node.Below to send the implementation procedure that data instances are described the E-LINE business to the port 4 of RPR node 813 from the port 5 of RPR node 811.
As shown in Figure 8, pass through the local port 5 access local ethernet business of Ethernet access unit as the RPR node 811 of professional transmitting terminal, then the ethernet frame that enters is classified, and add interim VLAN label 3501 with the Business Stream under identifying, be sent to Ethernet-RPR bridge unit then.
In RPR node 811, after Ethernet-RPR bridge unit receives the ethernet frame that has added interim VLAN label from the Ethernet access unit, it finds the parameter in the record with interim VLAN tag match in Table I FT, and utilize these parameters that ethernet frame is encapsulated in the RPR frame, suppose that here interim VLAN label 3501 is mapped as Service-ID 10000 with the Business Stream under the sign ethernet frame in the RPR frame.
In node 811, the RPR frame after Ethernet-RPR bridge unit package is sent to the MAC unit, by the RPR frame that receives is ranked and being sent on the link of RPR in the MAC unit.
RPR node 813 as professional receiving terminal receives the RPR frame from link, and MAC Address is extracted in the DA territory from this RPR frame.When RPR node 813 judges that according to MAC Address it is receiving node, judge type of service according to the Service-ID in the RPR frame again.Here and since value be 10000 Service-ID representative be an E-LINE Business Stream, so the MAC unit carries out data to the RPR frame and rejects (strip) operation, and this RPR frame is uploaded to Ethernet-RPR bridge unit.
In RPR node 813, after Ethernet-RPR bridge unit receives the RPR frame from the MAC unit, its in EFT table, find with value be the record that 10000 Service-ID is complementary, thereby determine corresponding interim VLAN label (for example being assumed to be 3505 here).Then, Ethernet-RPR bridge unit extracts ethernet frame from the RPR frame, and adds the interim VLAN label 3505 that finds at this ethernet frame front end.Then, Ethernet-RPR bridge unit is sent to the Ethernet access unit with the ethernet frame that adds interim VLAN label.
In RPR node 813, when the Ethernet access unit from after Ethernet-RPR bridge unit receives ethernet frame, it determines that according to interim VLAN label 3505 Ethernet interface port numbers of Business Stream is 4 under these ethernet frames, and the ethernet frame that will remove interim VLAN label sends to the purpose subscriber equipment through local ethernet interface port 4.
Send to the data of the port 5 of RPR node 811 for port 4, also adopt and above-mentioned same mode by RPR node 813.On the RPR network, realized point-to-point Ethernet service thus.
Fig. 9 is the schematic diagram according to the E-LAN business that realizes in the RPR network of another embodiment of the present invention.
Identical with embodiment shown in Figure 8, the RPR network also adopts the twin nuclei that is made of subring 1 and subring 2, each subring comprises four RPR node 911-914 and node is interconnected at together one way link with ring-type, and each node adopts the RPR Line cards of structure shown in Figure 2 to realize the function of node.Suppose to make up an E-LAN between the port 5 of the port 3 of port 6, node 912 and node 914 at RPR node 911.Below to send the implementation procedure that data instances are described the E-LAN business to the port 3 of RPR node 912 and the port 5 of node 914 by the port 6 of RPR node 911.
As shown in Figure 9, pass through the local port 6 access local ethernet business of Ethernet access unit as the RPR node 911 of professional transmitting terminal, then the ethernet frame that enters is classified, and add interim VLAN label 3600 with the Business Stream under identifying, be sent to Ethernet-RPR bridge unit then.
In RPR node 911, after Ethernet-RPR bridge unit receives the ethernet frame that has added interim VLAN label from the Ethernet access unit, it finds the parameter in the record with interim VLAN tag match in Table I FT, and utilize these parameters that ethernet frame is encapsulated in the RPR frame, suppose that here it is that 20000 Service-ID is with the Business Stream under this ethernet frame of sign in the RPR frame that interim VLAN label 3600 is mapped as value.With embodiment illustrated in fig. 8 different be, owing to be the E-LAN business, all addresses that need be broadcasted all are mapped to the MAC destination address, that is, the MAC destination address comprises the MAC Address of node 912 and 914.
In node 911, the RPR frame after Ethernet-RPR bridge unit package is sent to the MAC unit, by the RPR frame that receives is ranked and being sent on the link of RPR in the MAC unit.
RPR node 912 as professional receiving terminal receives the RPR frame from link, and MAC Address is extracted in the DA territory from this RPR frame.When RPR node 912 judges that according to MAC Address it is receiving node, judge type of service according to the Service-ID in the RPR frame again.Here and since value be 20000 Service-ID representative be an E-LAN Business Stream, so the MAC unit carries out the data copy operation to the RPR frame, and this RPR frame is uploaded to Ethernet-RPR bridge unit.
In RPR node 912, after Ethernet-RPR bridge unit receives the RPR frame from the MAC unit, its in EFT table, find with value be the record that 20000 Service-ID is complementary, thereby determine corresponding interim VLAN label (for example being assumed to be 3602 here).Then, Ethernet-RPR bridge unit extracts ethernet frame from the RPR frame, and adds the interim VLAN label 3602 that finds at this ethernet frame front end.Then, Ethernet-RPR bridge unit is sent to the Ethernet access unit with the ethernet frame that adds interim VLAN label.
In RPR node 912, when the Ethernet access unit from after Ethernet-RPR bridge unit receives ethernet frame, it determines that according to interim VLAN label 3602 Ethernet interface port numbers of Business Stream is 3 under these ethernet frames, and the ethernet frame that will remove interim VLAN label sends to the purpose subscriber equipment through local ethernet interface port 3.
Also handle to receive the RPR frame in the above described manner as the RPR node 914 of professional receiving terminal, just the interim VLAN label of this moment is 3601, and the Ethernet interface port numbers of Business Stream is 5 under the ethernet frame.
Send for data, also adopt and above-mentioned same mode by port 5 other destination address in same E-LAN of the port 3 of RPR node 912 or node 914.On the RPR network, realized multi-multipoint Ethernet service thus.
In the embodiment shown in Fig. 8 and 9, interim VLAN label can be distributed automatically by the embedded Control Software of RPR node, and Service-ID can be disposed by the RPR network management software.It is worthy of note that in the above-described embodiments, interim VLAN label is one and that is to say that only at the significant local variable of local node for same class Business Stream, different nodes can identify with different interim VALN labels; But Service-ID is a significant global variable in whole RPR network range, that is, same class Business Stream must have identical Service-ID value.
After reading above-mentioned disclosure content, other modification it will be apparent to one skilled in the art that to be conspicuous.This modification may relate to well-known features, and these features can replace the feature described here or use in the mode of adding.
In this specification and claims, appear at before the unit word " " not the situation with a plurality of this unit foreclose.And word " comprises " situation that not eliminating also has other unit or step to exist except that institute's column unit or step.
Claims (25)
1, a kind of method that in Resilient Packet Ring, realizes Ethernet service, subscriber equipment may further comprise the steps in node inserts described Resilient Packet Ring:
A described node place generates the Resilient Packet Ring frame that comprises service identification information and ethernet frame therein, and described service identification information is used to identify the affiliated Business Stream of described ethernet frame;
Send described Resilient Packet Ring frame through described Resilient Packet Ring; And
Other described node place sends described ethernet frame according to described service identification information to described subscriber equipment at least one.
2, the method for claim 1, wherein described service identification information comprises service marker, and generates described Resilient Packet Ring frame according to following manner:
Interim VLAN label according to described ethernet frame is determined described service marker; And
Described service marker and ethernet frame are encapsulated in the described Resilient Packet Ring frame.
3, method as claimed in claim 2, wherein, determine to receive the described subscriber equipment of described ethernet frame by described service identification information according to following manner:
Determine described interim VLAN label according to the described service marker in the described Resilient Packet Ring frame; And
Determine to receive the described subscriber equipment of described ethernet frame according to described interim VLAN label.
4, as any described method among the claim 1-3, wherein, described Business Stream carrying E-LINE business or E-LAN business.
5, as claim 2 or 3 described methods, wherein, the attribute of described service marker and described Business Stream is that index is stored in first tabulation with described interim VLAN label, and the corresponding relation of described interim VLAN label and described service marker is stored in second tabulation.
6, as claim 2 or 3 described methods, wherein, described service marker meets the MPLS form.
7, as claim 2 or 3 described methods, wherein, described Resilient Packet Ring frame generates by insert described service marker between the protocol type of the Resilient Packet Ring expansion frame of following IEEE 802.17 standards and Service Data Unit, and described ethernet frame is mapped to described Service Data Unit.
8, as any described method among the claim 1-3, wherein, by described ethernet frame is categorized as different Business Streams according at least a in the following message, make each described ethernet frame corresponding: the interface port of the VLAN label of described ethernet frame, VLAN priority and described subscriber equipment and Resilient Packet Ring with a Business Stream.
9, method as claimed in claim 8, wherein, described interim VLAN label and described VLAN label are followed IEEE 802.1Q/D standard.
10, a kind of equipment of realizing Ethernet service in Resilient Packet Ring comprises:
The Ethernet access unit links to each other to receive and to send ethernet frame with one or more subscriber equipmenies;
The medium access control unit, the link that inserts described Resilient Packet Ring is to send and to receive the Resilient Packet Ring frame; And
Ethernet-Resilient Packet Ring bridge unit, link to each other with described medium access control unit with described Ethernet access unit, be used for described Ethernet access unit is encapsulated as the Resilient Packet Ring frame from the described ethernet frame that described subscriber equipment receives, with described medium access control unit is descapsulated into described ethernet frame from the described Resilient Packet Ring frame that the link of described Resilient Packet Ring receives, described Resilient Packet Ring frame comprises service identification information and described ethernet frame, and described service identification information is used to identify the affiliated Business Stream of described ethernet frame.
11, equipment as claimed in claim 10, wherein, by described ethernet frame is categorized as different Business Streams according at least a in the following message, make each described ethernet frame corresponding: the interface port of the VLAN label of described ethernet frame, VLAN priority and described subscriber equipment and Resilient Packet Ring with a Business Stream.
12, equipment as claimed in claim 10, wherein, described Business Stream carrying E-LINE business or E-LAN business.
13, equipment as claimed in claim 12, wherein, described medium access control unit is when receiving described Resilient Packet Ring frame, if determine described Business Stream carrying E-LINE business according to described service identification information, then remove described Resilient Packet Ring frame from described Resilient Packet Ring, if determine described Business Stream carrying E-LAN business according to described service identification information, then duplicate described resilient packet ring frame.
14, equipment as claimed in claim 10, wherein, described subscriber equipment is a kind of in Ethernet switch and the ethernet local area network.
15, equipment as claimed in claim 10, wherein, described Ethernet access unit adopts the 2nd layer switch chip or network processor chip to realize.
16, equipment as claimed in claim 10, wherein, described Ethernet-Resilient Packet Ring bridge unit adopts programmable logic device to realize.
17, equipment as claimed in claim 10, wherein, the medium access control function of IEEE 802.17 definition is realized in described medium access control unit.
18, a kind of RPR network that Ethernet service is provided comprises twin nuclei, and described twin nuclei comprises link and inserts a plurality of nodes of described link,
Wherein, each described node comprises:
The Ethernet access unit links to each other to receive and to send ethernet frame with one or more subscriber equipmenies;
The medium access control unit inserts described link to send and to receive the Resilient Packet Ring frame; And
Ethernet-Resilient Packet Ring bridge unit, link to each other with described medium access control unit with described Ethernet access unit, be used for described Ethernet access unit is encapsulated as the Resilient Packet Ring frame from the described ethernet frame that described subscriber equipment receives, with described medium access control unit is descapsulated into described ethernet frame from the described Resilient Packet Ring frame that described link receives, described Resilient Packet Ring frame comprises service identification information and described ethernet frame, and described service identification information is used to identify the affiliated Business Stream of described ethernet frame.
19, RPR network as claimed in claim 18, wherein, by described ethernet frame is categorized as different Business Streams according at least a in the following message, make each described ethernet frame corresponding: the interface port of the VLAN label of described ethernet frame, VLAN priority and described subscriber equipment and Resilient Packet Ring with a Business Stream.
20, RPR network as claimed in claim 18, wherein, described Business Stream carrying E-LINE business or E-LAN business.
21, RPR network as claimed in claim 20, wherein, described medium access control unit is when receiving described Resilient Packet Ring frame, if determine described Business Stream carrying E-LINE business according to described service identification information, then remove described Resilient Packet Ring frame from described link, if determine described Business Stream carrying E-LAN business according to described service identification information, then duplicate described resilient packet ring frame.
22, RPR network as claimed in claim 18, wherein, described subscriber equipment is a kind of in Ethernet switch and the ethernet local area network.
23, RPR network as claimed in claim 18, wherein, described Ethernet access unit adopts the 2nd layer switch chip or network processor chip to realize.
24, RPR network as claimed in claim 18, wherein, described Ethernet-Resilient Packet Ring bridge unit adopts programmable logic device to realize.
25, RPR network as claimed in claim 18, wherein, the medium access control function of IEEE 802.17 definition is realized in described medium access control unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100098697A CN101515880A (en) | 2008-02-18 | 2008-02-18 | Method and equipment for providing Ethernet service on network based on resilient packet ring |
| PCT/EP2009/051449 WO2009103625A1 (en) | 2008-02-18 | 2009-02-09 | Method and apparatus for providing ethernet services in a resilient packet ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100098697A CN101515880A (en) | 2008-02-18 | 2008-02-18 | Method and equipment for providing Ethernet service on network based on resilient packet ring |
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| Publication Number | Publication Date |
|---|---|
| CN101515880A true CN101515880A (en) | 2009-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100098697A Pending CN101515880A (en) | 2008-02-18 | 2008-02-18 | Method and equipment for providing Ethernet service on network based on resilient packet ring |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101515880A (en) |
| WO (1) | WO2009103625A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102318291A (en) * | 2011-07-14 | 2012-01-11 | 华为技术有限公司 | Business flow processing method, device and system |
| CN104410574A (en) * | 2014-11-28 | 2015-03-11 | 杭州华三通信技术有限公司 | Node equipment in RPR network and method of node equipment for packet forwarding |
| CN106899507A (en) * | 2017-01-16 | 2017-06-27 | 新华三技术有限公司 | A kind of file transmitting method and device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9509598B2 (en) | 2013-08-02 | 2016-11-29 | Time Warner Cable Enterprises Llc | Apparatus and methods for intelligent deployment of network infrastructure based on tunneling of ethernet ring protection |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2563832A (en) * | 1949-01-10 | 1951-08-14 | Gates Marshall | Insect repellents |
| CN1625176B (en) * | 2003-12-03 | 2010-04-28 | 华为技术有限公司 | Realization method of edge to edge pseudo-line simulation protocol |
| CN100502341C (en) * | 2004-04-21 | 2009-06-17 | 华为技术有限公司 | Implementing method and system for transmitting Ethernet service over RPR network |
| JP4887897B2 (en) * | 2006-05-12 | 2012-02-29 | 富士通株式会社 | Packet transmission device, packet transmission method and packet transmission system |
-
2008
- 2008-02-18 CN CNA2008100098697A patent/CN101515880A/en active Pending
-
2009
- 2009-02-09 WO PCT/EP2009/051449 patent/WO2009103625A1/en active Application Filing
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102318291A (en) * | 2011-07-14 | 2012-01-11 | 华为技术有限公司 | Business flow processing method, device and system |
| WO2012106892A1 (en) * | 2011-07-14 | 2012-08-16 | 华为技术有限公司 | Method, apparatus and system for processing service flow |
| CN102318291B (en) * | 2011-07-14 | 2014-02-19 | 华为技术有限公司 | Business flow processing method, device and system |
| US9262191B2 (en) | 2011-07-14 | 2016-02-16 | Huawei Technologies Co., Ltd. | Method, apparatus, and system for processing service flow |
| CN104410574A (en) * | 2014-11-28 | 2015-03-11 | 杭州华三通信技术有限公司 | Node equipment in RPR network and method of node equipment for packet forwarding |
| CN106899507A (en) * | 2017-01-16 | 2017-06-27 | 新华三技术有限公司 | A kind of file transmitting method and device |
| CN106899507B (en) * | 2017-01-16 | 2019-12-06 | 新华三技术有限公司 | message sending method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009103625A1 (en) | 2009-08-27 |
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