CN101047600A - City range Ethernet bridge equipment, system and method for providing service to it - Google Patents
City range Ethernet bridge equipment, system and method for providing service to it Download PDFInfo
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- CN101047600A CN101047600A CN 200610060673 CN200610060673A CN101047600A CN 101047600 A CN101047600 A CN 101047600A CN 200610060673 CN200610060673 CN 200610060673 CN 200610060673 A CN200610060673 A CN 200610060673A CN 101047600 A CN101047600 A CN 101047600A
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Abstract
A method for providing service at edge of metropolitan area Ethernet includes connecting user bridge network based on C-VLAN to user edge port of MAC-in-MAC edge network bridge, setting up mapping relation table of virtual user ID to operation firm service based on user edge Ethernet port of MAC-in-MAC edge network bridge, identifying data message by MAC-in-MAC edge network bridge and finalizing service example mapping or outlet port mapping according to said mapping relation.
Description
Technical field
The present invention relates to the Metro Ethernet technical field, relate in particular to a kind of Metro Ethernet bridge equipment, system and provide service method for it.
Background technology
For convenience of description and understand, before introducing existing scheme, be necessary to illustrate earlier some Key Terms of mentioning among the present invention.
I assembly (I-Component or I-Comp) is the crucial forwarding component of MAC-in-MAC edge bridges, it is a S-VLAN bridge assembly, this assembly provides S-Tagged interface or transparent (Transparent) interface at user side, in the backbone network side, utilize I-SID to be abstracted into virtual instance port, EISS is provided service, a plurality of virtual instance port down merge into an ISS port (up then resolving into a plurality of EISS by an ISS according to I-SID) again, (Backbone Source Address B-SA) just disposes on this port backbone source address.
User's bridge network (Customer Bridged Network) refers in particular to the Ethernet based on IEEE Std 802.1d and IEEE Std 802.1q establishment, in IEEE P802.1ad 6.0/ah 2.0 and the present invention, it is considered as Metro Ethernet service object will be provided.
Operator's bridge network (Provider Bridged Network) refers in particular to the carrier network of setting up based on the Q-in-Q scheme, is used for providing the ether service to user's bridge network, has further expanded Ethernet and has realized the isolation of Service VLAN and user vlan.
Key bridge network (Backbone Bridged Network) refers in particular to the key Ethernet of setting up based on the MAC-in-MAC scheme, is mainly used in a plurality of operators of interconnection bridge network.For convenience of description, in this article,, the location of MAC-in-MAC Ethernet bridge has been pushed to still be called key bridge network after the customer edge even in the MAC-in-MAC Ethernet bridge, defined the C-Tagged service interface.
The bearer network that Metro Ethernet general reference operator utilizes the ether technology to set up, the saying of narrow sense, the operator's bearer network that refers to use above-mentioned operator bridge network and key bridge network to be constituted exactly.
Ethernet (Ethernet) is a kind of Local Area Network technology, and its development has been experienced from hub (HUB) to bridge (Bridge), arrives the process of virtual local area network technology (VLAN) again.Vlan technology is by the destination address (DA at the ether data message, Destination Address) and source address (SA, Source Destination) label (TAG) is inserted in the back, utilize 12 bit virtual identifying (VID among the TAG, Virtual ID) the ether data message is divided into different basins, make and can logically set up a plurality of (4K at most) virtual local area network (LAN) on the physical LAN, typically, the Ethernet message of a band TAG adopts following form:
| DA | SA | TAG (containing VID) | Load | Verification |
In recent years, development of Ethernet technology has begun to move towards metropolitan area network from local area network (LAN), Metro Ethernet refers to the service network that operator utilizes the ether technology to set up, and the needed Metro Ethernet of operator not only requires more basin, and requirement and user network isolation.In order to realize the extensibility of Ethernet, support big capacity ether bearer network, and user-isolated network and operator's bearer network, Q-in-Q scheme and MAC-in-MAC scheme have been proposed at present.
So-called Q-in-Q, be meant the meaning of nested VLAN, this scheme has expanded one deck VLAN label again on the basis of original VLAN, make basin quantity reach 4K * 4K, and carrier network only uses the outside VLAN label to do the forwarding foundation, promptly set up the VLAN of operator oneself, be called Service VLAN (S-VLAN, Service Provider VLAN), also can be called a srvice instance, correspondingly, the VLAN of definition originally is called user vlan (Customer VLAN, C-VLAN), the network based on C-VLAN is called user's bridge network, the operator's Ethernet based on the Q-in-Q scheme is called operator's bridge network.
For C-VLAN, user vlan label (Customer TAG in the data message, user vlan ID (Customer VLAN ID is arranged C-TAG), C-VID) be used to distinguish the user basin, and S-VLAN uses Service VLAN TAG (S-TAG), and its form is basic consistent with C-TAG, wherein has Service VLAN ID (S-VID) to be used to distinguish the operator basin, also be 12 bits, contain a plurality of user C-VID among each S-VID of operator.Typical case's message format is as follows:
| C-DA | C-SA | S-TAG (containing S-VID) | C-TAG (containing C-VID) | Load | Verification |
The Q-in-Q scheme has defined three kinds of user interfaces:
1.Port-based Service Interface: based on the service interface of port, at operator bridge network edge, provide service based on port to the user, the srvice instance that all customer data message (all C-VLAN of this port) from this port all is mapped to this port and is disposed is on the S-VLAN;
2.C-Tagged Service Interface:C-Tagged service interface, operator's bridge network edge device can be discerned C-TAG, even the user data message that comes on the same like this port, can select srvice instance according to C-VID, in general, can dispose a plurality of S-VLAN based on this port, the several C-VLAN of multiple connection under each S-VLAN.
3.S-Tagged Service Interface:S-Tagged service interface, user's bridge network edge device can be discerned S-VLAN, and user's bridge network is just submitted to data message operator's bridge network after finishing the Q-in-Q encapsulation.
Easy easy-to-use Q-in-Q scheme has solved the scaling concern of Ethernet to a certain extent, make that number of users rolls up in the Ethernet, the thing followed, be because thorough inadequately in the Q-in-Q scheme to the isolation of user network, operator's bridge network has to learn user's MAC address, make the forwarding tables of data that bridge will set up (Filter Database, FDB) list item rolls up, this has become to further expand the bottleneck of network size.
The MAC-in-MAC scheme proposes at the edge of key bearer network the whole Ethernet data message from user's bridge network or operator's bridge network to be encapsulated a layer MAC address again and (calls key MAC Address, Backbone MAC Address), form key bridge network, form the tunnel transmission mechanism, set up the MAC access point at key bridge network edge, the key MAC Address of each fringe node drives many user's MAC address.
In key bridge network core, the work behavior of Ethernet and common Ethernet are similar, comprise address learning, forwarding behavior and generate tree etc., and key bridge network also has VLAN, be called backbone VLAN (Backbone VLAN, B-VLAN), (Backbone VLANTAG, form B-TAG) also S-TAG is the same for its label backbone VLAN TAG.But edge at key bridge network, finish two big functions: finish encapsulation and the decapsulation of MAC-in-MAC and carry out the srvice instance mapping, defined service instance tag (the Service Instance TAG of a special use in the MAC-in-MAC scheme, I-TAG), include target MAC (Media Access Control) address (the Customer DA of user data message, C-DA) and source MAC (Customer SA, C-SA), also contain srvice instance sign (Service Instance ID among the I-TAG, I-SID), long 24 bits or 28 bits, srvice instance of each value representation.These two functions are to finish on a bridging component that is called I assembly (I-Component), and the I assembly is a bridging component based on S-TAG.The parts that can be used for edge bridges in addition also have B assembly (B-Component), and it is based on the bridging component of B-TAG, but its part port can be discerned I-TAG; Also have the S-VLAN assembly of transmitting based on S-TAG, based on the C-VLAN assembly that C-TAG transmits, edge bridges can make up these assemblies, provides different service interfaces to the user then.The I assembly is must be indispensable at the MAC-in-MAC bridge.As follows through the MAC-in-MAC encapsulation format that key bridge network edge is finished:
| B-DA | B-SA | B-TAG (containing B-VID) | I-TAG (I-SID、C-DA、 C-SA) | S-TAG (containing S-VID) | C-TAG (containing C-VID) | Load | Verification |
The MAC-in-MAC scheme has defined three kinds of user interfaces:
1.Transparent Service Interface: transparent service interface, promptly based on the service interface of port, provide service based on port to operator's bridge network or user's bridge network at key bridge network edge, all data messages that come from this port all are mapped in the srvice instance (ServiceInstance is by the I-SID sign) that disposes for this port.This interface is to be provided by the I assembly in the edge bridges.
2.S-Tagged Service Interface:S-Tagged service interface, the port at key bridge network edge can be discerned S-TAG, do the srvice instance mapping based on S-VID, dual mode is arranged: each S-VLAN is mapped to a srvice instance and a plurality of S-VLAN is mapped to a srvice instance, also claims S-TaggedService Bundling Interface.This interface also is that the I assembly by edge bridges provides.
3.I-Tagged Service Interface:I-Tagged service interface, realized the srvice instance mapping at operator's bridge network or user's bridge network edge, and after finishing the MAC-in-MAC encapsulation data message is directly submitted to core backbone, that is to say, realize the B assembly in the edge bridges, and make I that assembly is implemented in user side.
The advantage of MAC-in-MAC scheme is, for key bridge network, since the transmission in the network core and only transmitting with the MAC Address of backbone edge MAC access point as transmitting foundation, and fringe node quantity is not a lot, so the FDB of key Ethernet core can be very not big.This scheme still is positioned at key bridge network edge at present basically, mainly be in the face of operator's bridge network, though also defined transparent service interface, direct user oriented bridge network to a certain extent, but but not as operator's bridge, definition C-Tagged interface can not provide more fine-grained service.
Summary of the invention
The objective of the invention is provides C-Tagged service interface in MAC-in-MAC Metro Ethernet edge bridges, so that make Operator Specific Service insert user's bridge network with thinner granularity, push bridges such as MAC-in-MAC to customer edge.For this reason, the invention provides a kind ofly provides service method at the Metro Ethernet edge, comprising:
A, be connected to the customer edge port of MAC-in-MAC edge bridges based on user's bridge network of C-VLAN;
B, based on the customer edge Ethernet interface of MAC-in-MAC edge bridges, set up Virtual User ID and operator the service the mapping relations table;
C, MAC-in-MAC edge bridges recognition data message also finish srvice instance mapping or outbound port mapping according to described mapping relations.
The edge bridges of MAC-in-MAC described in the present invention is supported the C-Tagged service interface, and described C-Tagged service interface is positioned at the user side of described edge bridges, and described user's bridge network based on C-VLAN is connected with described MAC-in-MAC edge bridges by the C-Tagged service interface.
The present invention further comprises, the mapping relations of described Virtual User ID and operator's service are the mapping relations of C-VID and I-SID, and C-VID can only corresponding I-SID, but an I-SID can corresponding a plurality of C-VID.
Step B disclosed by the invention further comprises:
B1, realize the mapping of C-VID and I-SID based on the I assembly of C-VLAN by configuration;
Or
B2, with the C-VLAN assembly with realize the mapping of C-VID and I-SID based on the trunking scheme of the I assembly of S-VLAN.
Wherein above-mentioned steps B1 further comprises:
B11, in the MAC-in-MAC edge bridges definition based on the I assembly of C-VLAN;
B12, to be the I assembly create the EISS virtual port that srvice instance I-SID is associated in the backbone network side;
B13, be that described virtual port among the step B12 is specified C-VLAN PVID;
B14, be the mark C-VLAN ID under the described virtual port among the step B12.
Above-mentioned steps B2 further comprises:
B21, on the C-VLAN of MAC-in-MAC edge bridges assembly, create a virtual port;
B22, on the described virtual port of step B21, dispose PVID;
B23, the C-VLAN ID on the described virtual port of step B21 under the configuration;
B24, on the I of MAC-in-MAC edge bridges assembly, create a transparent service interface based on S-VID, and configuration and S-VID corresponding ports virtual ID;
B25, the backbone network side is created an EISS virtual port on the I assembly, and related I-SID, among the same configuration step B24 with S-VID corresponding ports virtual ID;
B26, to be the described virtual port of step B21 set up related with the described virtual port of step B24.
The C of step described in the inventive method further comprises:
C1, in based on the I assembly of C-VLAN, realize the mapping of C-VID to I-SID from the data message of user's bridge network;
Or
C2, in the trunking scheme of C-VLAN assembly and I assembly, realize the mapping of C-VID to I-SID from the data message of user's bridge network.
Wherein above-mentioned steps C1 further comprises:
Have or not the C-TAG field in the data message that C11, judgement are received,, then utilize the C-TAG field to be associated with the C-VID field,, then utilize PVID to come the associated data message if there is not the C-TAG field if the C-TAG field is arranged;
C12, carry out FDB retrieval, determine to fictionalize port, promptly shine upon srvice instance I-SID with C-VID+C-DA;
C13, I assembly are finished the encapsulation of message.
Above-mentioned steps C2 further comprises:
Judge in the data message of receiving to have or not the C-TAG field,, then utilize the C-TAG field to be associated with the C-VID field,, then utilize PVID to come the associated data message if there is not the C-TAG field if the C-TAG field is arranged.
Step C of the present invention further comprises:
C3, in I assembly, finish the mapping of outbound port from the data message of operator backbone bridge network based on C-VLAN;
Or
C4, in C-VLAN assembly and trunking scheme, realize the mapping of outbound port from the data message of operator backbone bridge network based on the I assembly of S-VLAN.
Wherein said step C3 further comprises:
Extract I-TAG in C31, the described data message of I assembly;
C32, I assembly are determined the EISS virtual port according to I-SID, are that FDB looked in index then with C-VID+C-DA, and determining port is the C-Tagged service interface;
C33, message are delivered to user's bridge network from the C-Tagged service interface.
Described step C4 further comprises:
Extract I-TAG in C41, the described data message of I assembly, and from I-TAG, extract I-SID, C-DA;
C42, at I assembly provider backbone bridge network side, according to definite EISS virtual port, obtain the value of port virtual ID, be associated with S-VID;
C43, utilize S-VID and C-DA to look into the FDB of I assembly, determining port is to be the transparent service interface of port virtual ID;
C44, message are delivered to the C-VLAN assembly from the transparent service interface of I assembly;
C45, C-VLAN assembly utilize C-DA and C-VID to look into the FDB of C-VLAN assembly, and determining port is the C-Tagged service interface;
C46, message are delivered to user's bridge network from the C-VLAN assembly.
The present invention also for having come a kind of Metro Ethernet bridge equipment, comprising:
The customer edge port that at least one supports the C-Tagged service interface is used for directly linking to each other with user's bridge network edge port;
At least one key bridge network port is used for sending datagram and receiving data packets from key bridge network to key bridge network;
At least one I assembly is used to finish encapsulation and the decapsulation of MAC-in-MAC and carries out the srvice instance mapping.
Above-mentioned bridge equipment can also comprise a C-VLAN assembly, is used to realize the mapping between C-VID and the I-SID.
The present invention discloses a kind of Metro Ethernet system, this system comprises user's bridge network and operator backbone bridge network, and described user's bridge network is connected to described operator backbone bridge network by the Provider Edge bridge, connects by the backbone network edge bridges between the described operator backbone bridge network.
Described backbone network edge bridges disclosed by the invention is supported the MAC-in-MAC access way, and described user's bridge network is based on user's bridge network of C-VLAN.
Backbone network edge bridges in the system disclosed by the invention comprises:
The customer edge port that at least one supports the C-Tagged service interface is used for directly linking to each other with user's bridge network edge port;
At least one key bridge network port is used for sending datagram and receiving data packets from key bridge network to key bridge network;
At least one I assembly is used to finish encapsulation and the decapsulation of MAC-in-MAC and carries out the srvice instance mapping.
Described bridge can also comprise a C-VLAN assembly at least, is used to realize the mapping between C-VID and the I-SID.
The MAC-in-MAC edge bridges is supported the C-Tagged service interface in system of the present invention, and described C-Tagged service interface is positioned at the user side of described edge bridges, and is connected with described MAC-in-MAC edge bridges by the C-Tagged service interface based on user's bridge network of C-VLAN.
Description of drawings
Fig. 1 is a Q-in-Q scheme schematic diagram of the prior art.
Fig. 2 is a MAC-in-MAC scheme schematic diagram of the prior art.
Fig. 3 provides the schematic diagram of C-Tagged service interface for what propose in the embodiment of the invention one based on the I assembly of C-VLAN.
Fig. 4 provides the schematic diagram of C-Tagged service interface for what propose in the embodiment of the invention two with C-VLAN assembly and I assembly trunking scheme.
Fig. 5 is the Metro Ethernet system schematic that the present invention is based on the C-Tagged service interface.
Embodiment
The present invention has defined a kind of MAC-in-MAC edge bridges implementation of the I of containing assembly, be primarily characterized in that, user side at this bridge provides C-Tagged service interface, make backbone network edge bridges (BEB) directly to select srvice instance according to C-VID, and then make the operator backbone bridge network directly to provide the ether service to user's bridge network, and needn't be through the operator's bridge network based on the Q-in-Q scheme, its advantage is can finish isolation (MAC-in-MAC) completely at customer edge, reduced the level of network, promote the development of MAC-in-MAC backbone core network, alleviated the pressure of Q-in-Q network.
In order to make technical scheme of the present invention clearer, below in conjunction with accompanying drawing content of the present invention is described further, need to prove that embodiments of the invention only are used for explaining the present invention, but do not represent limitation of the invention.
Provided by the present invention for the MAC-in-MAC bridge provide the C-Tagged interface method can by configuration based on the I assembly of C-VLAN with provide two kinds of different modes of C-Tagged service interface to realize with the C-VLAN assembly with I assembly trunking scheme based on S-VLAN.
At first illustrate and in the MAC-in-MAC bridge, dispose the method that the C-Tagged service interface is provided based on the I assembly of C-VLAN.
Preamble is mentioned, comprise one or more I assembly in the key ethernet mac-in-MAC edge bridges, and in the I assembly, finish srvice instance mapping and MAC-in-MAC encapsulation/decapsulation process, but up to present MAC-in-MAC scheme mainly is operatable object merchant bridge network, therefore the I assembly is based on S-VLAN, so S-Tagged service interface and transparent service interface (also being based on S-VID's) can only be provided.If in the MAC-in-MAC Ethernet bridge, realize the C-Tagged interface,, just can directly set up the mapping relations of C-VID to I-SID as long as make I that assembly is based on C-VLAN.
As shown in Figure 3, I assembly based on C-VLAN is that a C-VLAN transmits bridging component, its user-side port can be discerned C-TAG, port VID (the Port VID of configuration, PVID) also resolve according to C-VID, its backbone network side ports is divided into many virtual ports, the related I-SID of each virtual port, each virtual port perception C-TAG, the PVID of configuration also resolves according to C-VID, finishing the related of C-VID and I-SID on the I assembly, particularly, is exactly the C-VLAN under the configuration on the associated virtual port of each I-SID.
The specific implementation method is, in the I assembly, be that FDB looked in index directly according to C-VID+C-DA, obtain key destination address (Backbone Destination Address after hitting, B-DA) and related I-SID, wherein the incidence relation of I-SID and C-VID is that configured in advance is good, C-VLAN when creating the I-SID virtual port under the configured port just equals to have configured the mapping relations of I-SID and C-VID, so just can obtain I-SID from C-VID.But an I assembly can not provide C-Tagged interface and S-Tagged interface simultaneously, because the former require FDB with C-VID+C-DA as index, and the latter with S-VID+C-DA as index, in order to address this problem, can in the MAC-in-MAC bridge, create the I assembly of two and even a plurality of difference in functionalitys, these I assemblies have provides S-Tagged, and what have provides C-Tagged interface.
With the listed corresponding relation of table one, specify the implementation of present embodiment below.
Table one
| C-VID | I-SID |
| 5 | 2012 |
| 10 | 1011 |
| 12 | |
| 33 | 8081 |
| 303 | |
| 22 |
With table one is example, and the layoutprocedure of the mapping of C-VID and I-SID is as follows:
1, create a srvice instance I-SID, be the I assembly in the left side (backbone network side) set up one and strengthen sublayer service (Enhanced Internal Sublayer Service, EISS) virtual port can define I-SID=8081.
2, specify the PVID of the C-VLAN of 1 described virtual port, as shown in Table 1, can define PVID=33.
3, specify the affiliated C-VLAN ID of 1 described virtual port, (being that port adds C-VLAN in the Tagged mode) as described in table one, can define two, 303 and 22.
Reference table one, receive that from the C-Tagged service interface typical treatment process behind the C-VID=33 data message is as follows:
1, the C-TAG of recognition data message, here C-VID=33;
2, look into FDB with C-VID+C-DA, determine to fictionalize port, related I-SID=8081;
3, because the virtual port PVID=33 of I-SID=8081, so the message encapsulation format that the I assembly is finished is as follows:
| B-DA | B-SA | B-TAG | I-TAG (I-SID＝8081) | Load | Verification |
If C-VID=22, then last encapsulation format is:
| B-DA | B-SA | B-TAG | I-TAG (I-SID＝8081) | C-TAG (C-VID＝22) | Load | Verification |
Conversely, the backbone network data message extracts I-TAG after being received by I-Component, determines the virtual port into EISS according to I-SID, looks into FDB with C-VID associating C-DA then, and determining port is the C-Tagged interface.
Fig. 4 is another implementation of the present invention, promptly provides C-Tagged service interface with the C-VLAN assembly with based on the I assembly trunking scheme of S-VLAN in the MAC-in-MAC bridge.In the present embodiment, directly do not utilize the I assembly to provide interface, but make the I assembly provide transparent service interface, provide C-Tagged service interface by the C-VLAN assembly to user's bridge network then to the C-VLAN assembly to the user.
As previously mentioned, for I assembly, can not realize the direct mapping of C-VID to I-SID based on S-VLAN.And the present invention adds an intermediate steps at C-VID in the mapping process of I-SID, be that C-VID shines upon to S-VID earlier, shine upon to I-SID then, but this S-VID does not have physical meaning for the outside, resolve to a virtual interface in bridge inside, determine to fictionalize interface from the data message that the user receives according to C-VID, promptly be equivalent to this S-VID related.And making the I assembly that transparent service interface is provided in inside, each an internal virtual interface of C-VLAN assembly and an inner transparent service interface of I assembly link to each other.On effect, finally also be that each srvice instance carries one or more C-VLAN, its corresponding relation can be represented with table two.
Table two
| C-VID | S-VID (related inner transparent service interface) | I-SID |
| 5 | 82 | 2012 |
| 10 | 10 | 1011 |
| 12 | ||
| 33 | 100 | 8081 |
| 303 | ||
| 22 |
The described scheme of Fig. 4, the mapping layoutprocedure of C-VID and I-SID is as follows:
1, on the C-VLAN of MAC-in-MAC edge bridges assembly, creates a virtual port;
2, on 1 described virtual port, dispose PVID, such as making PVID=33;
3, the C-VLAN ID under the configuration 1 described virtual port, (being that port adds C-VLAN in the Tagged mode) defines two here, 303 and 22;
4, on the I of MAC-in-MAC edge bridges assembly, create a transparent service interface, dispose PVID=100 (being the meaning of S-VID) here;
5, create an EISS virtual interface at I assembly upper left side, related I-SID=8081 also disposes PVID=100 (being the meaning of S-VID);
6,1 described virtual port and 4 described virtual ports are associated.
Then receive that from the C-Tagged interface data message processing procedure of a C-VID=33 is as follows:
1, the C-TAG of recognition data message, here C-VID=33;
2, look into the FDB of C-VLAN assembly with C-VID+C-DA, can determine to fictionalize port, because the PVID on this virtual port is 33, message format is as follows after therefore coming out from C-VLAN:
| C-DA | C-SA | Load | Verification |
3, enter transparent service interface, since PVID=100, related S-VID=100;
4, utilize S-VID and C-DA to look into the FDB of I assembly, determine to fictionalize interface, be associated with
I-SID=8081, and PVID=100 then finishes the as follows of encapsulation format on the I assembly:
| B-DA | B-SA | B-TAG | I-TAG (I-SID＝8081) | Load | Verification |
Investigate an inverse process that is associated with the data message of I-SID=8081 and C-VID=22:
1, receive that from the left side port (backbone network side) of I assembly message is as follows:
| B-DA | B-SA | B-TAG | I-TAG (I-SID＝8081) | C-TAG (C-VID＝22) | Load | Verification |
2, the packet literary composition (promptly peeling off B-DA, B-SA) of the key Ethernet of termination extracts I-SID, C-DA from I-TAG;
3, in I assembly left side, determine the EISS virtual port, obtain PVID=100, promptly related S-VID=100 according to I-SID=8081;
4, utilizing S-VID and C-DA to look into the FDB of I assembly, determine port, is the transparent service interface of PVID=100;
5, message is delivered to the C-VLAN assembly from the transparent service interface of I assembly, and this moment, form was:
| C-DA | C-SA | C-TAG (C-VID＝22) | Load | Verification |
6, utilize C-DA and C-VID to look into the FDB of C-VLAN assembly, can determine port, i.e. the C-Tagged service interface.
7, message is delivered to user's bridge from the C-VLAN assembly.
Each MAC-in-MAC edge bridges can be supported a plurality of C-Tagged service interfaces, and each user distributes one or more C-Tagged service interface, but each user should corresponding unique I assembly.
Simultaneously, the present invention also provides a kind of Metro Ethernet network, and as shown in Figure 5, user's bridge network is connected to the operator backbone bridge network by the Provider Edge bridge in this network, connects by the backbone network edge bridges between each operator backbone bridge network.Wherein the Provider Edge bridge realizes that by the C-Tagged interface user inserts and srvice instance mapping and secondary MAC encapsulation.The operator backbone bridge network is realized interconnection by the I-Tagged interface of backbone network edge bridges.
In a word, the present invention utilizes at MAC-in-MAC Ethernet bridge user side and realizes the C-Tagged interface, directly provide the ether service to user's bridge network, realized the isolation of carrier network and user network, reduced the level of network, promote the development of MAC-in-MAC backbone core network, make the operator's bridge network that is positioned at the User Access Layer face and be positioned at the key Ethernet balanced growth of core net aspect.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (21)
1, a kind ofly provide service method, comprising at the Metro Ethernet edge:
A, be connected to the customer edge port of MAC-in-MAC edge bridges based on user's bridge network of C-VLAN;
B, based on the customer edge Ethernet interface of MAC-in-MAC edge bridges, set up Virtual User ID and operator the service the mapping relations table;
C, MAC-in-MAC edge bridges recognition data message also finish srvice instance mapping or outbound port mapping according to described mapping relations.
2, the method for claim 1 is characterized in that, described MAC-in-MAC edge bridges is supported the C-Tagged service interface, and described C-Tagged service interface is positioned at the user side of described edge bridges.
3, the method for claim 1 is characterized in that, described user's bridge network based on C-VLAN is connected with described MAC-in-MAC edge bridges by the C-Tagged service interface.
4, the method for claim 1 is characterized in that, the mapping relations of described Virtual User ID and operator service are the mapping relations of C-VID and I-SID, and C-VID can only corresponding I-SID, but an I-SID can corresponding a plurality of C-VID.
5, the method for claim 1 is characterized in that, described step B further comprises:
B1, realize the mapping of C-VID and I-SID based on the I assembly of C-VLAN by configuration;
Or
B2, with the C-VLAN assembly with realize the mapping of C-VID and I-SID based on the trunking scheme of the I assembly of S-VLAN.
6, method as claimed in claim 5 is characterized in that, described step B1 further comprises:
B11, in the MAC-in-MAC edge bridges definition based on the I assembly of C-VLAN;
B12, to be the I assembly create the associated EISS virtual port of srvice instance I-SID in the backbone network side;
B13, be that described virtual port among the step B12 is specified C-VLAN PVID;
B14, be the C-VLAN ID under the described virtual port among the step B12.
7, method as claimed in claim 5 is characterized in that, described step B2 further comprises:
B21, on the C-VLAN of MAC-in-MAC edge bridges assembly, create a virtual port;
B22, on the described virtual port of step B21 configuration C-VLAN PVID;
B23, the C-VLAN ID on the described virtual port of step B21 under the configuration;
B24, on the I of MAC-in-MAC edge bridges assembly, create a transparent service interface based on S-VID, and configuration and S-VID corresponding ports virtual ID;
B25, the backbone network side is created an EISS virtual port on the I assembly, and related I-SID, among the same configuration step B24 with S-VID corresponding ports virtual ID;
B26, to be the described virtual port of step B21 set up related with the described virtual port of step B24.
8, the method for claim 1 is characterized in that, described step C further comprises:
C1, in based on the I assembly of C-VLAN, realize the mapping of C-VID to I-SID from the data message of user's bridge network;
Or
C2, in C-VLAN assembly and trunking scheme, realize the mapping of C-VID to I-SID based on the I assembly of S-VLAN from the data message of user's bridge network.
9, method as claimed in claim 8 is characterized in that, described step C1 further comprises:
Have or not the C-TAG field in the data message that C11, judgement are received,, then utilize the C-TAG field to be associated with the C-VID field,, then utilize PVID to come the associated data message if there is not the C-TAG field if the C-TAG field is arranged;
C12, carry out FDB retrieval, determine to fictionalize port, promptly shine upon srvice instance I-SID with C-VID+C-DA;
C13, I assembly are finished the encapsulation of message.
10, method as claimed in claim 8 is characterized in that, described step C2 further comprises:
Judge in the data message of receiving to have or not the C-TAG field,, then utilize the C-TAG field to be associated with the C-VID field,, then utilize PVID to come the associated data message if there is not the C-TAG field if the C-TAG field is arranged.
11, method as claimed in claim 8 is characterized in that, described step C further comprises:
C3, in I assembly, finish the mapping of outbound port from the data message of operator backbone bridge network based on C-VLAN;
Or
C4, in C-VLAN assembly and trunking scheme, realize the mapping of outbound port from the data message of operator backbone bridge network based on the I assembly of S-VLAN.
12, method as claimed in claim 11 is characterized in that, described step C3 further comprises:
Extract I-TAG in C31, the described data message of I assembly;
C32, I assembly are determined the EISS virtual port according to I-SID, are that FDB looked in index then with C-VID+C-DA, and determining port is the C-Tagged service interface;
C33, message are delivered to user's bridge network from the C-Tagged service interface.
13, method as claimed in claim 11 is characterized in that, described step C4 further comprises:
Extract I-TAG in C41, the described data message of I assembly, and from I-TAG, extract I-SID, C-DA;
C42, at I assembly provider backbone bridge network side, determine the EISS virtual port according to I-SID, obtain the value of its virtual ID, be associated with S-VID;
C43, utilize S-VID and C-DA to look into the FDB of I assembly, determining port is to be the transparent service interface of port virtual ID;
C44, message are delivered to the C-VLAN assembly from the transparent service interface of I assembly;
C45, C-VLAN assembly utilize C-DA and C-VID to look into the FDB of C-VLAN assembly, and determining port is the C-Tagged service interface;
C46, message are delivered to user's bridge network from the C-VLAN assembly.
14, a kind of Metro Ethernet bridge equipment is characterized in that, comprising:
The customer edge port that at least one supports the C-Tagged service interface is used for directly linking to each other with user's bridge network edge port;
At least one key bridge network port is used for sending datagram and receiving data packets from key bridge network to key bridge network;
At least one I assembly is used to finish encapsulation and the decapsulation of MAC-in-MAC and carries out the srvice instance mapping.
15, equipment as claimed in claim 14 is characterized in that, can also comprise a C-VLAN assembly, is used to realize the mapping between C-VID and the I-SID.
16, a kind of Metro Ethernet system, comprise user's bridge network and operator backbone bridge network, it is characterized in that described user's bridge network is connected to described operator backbone bridge network by the Provider Edge bridge, connect by the backbone network edge bridges between the described operator backbone bridge network.
17, system as claimed in claim 16 is characterized in that, described backbone network edge bridges is supported the MAC-in-MAC access way.
18, system as claimed in claim 16 is characterized in that, described user's bridge network is based on user's bridge network of C-VLAN.
19, system as claimed in claim 16 is characterized in that, described backbone network edge bridges comprises:
The customer edge port that at least one supports the C-Tagged service interface is used for directly linking to each other with user's bridge network edge port;
At least one key bridge network port is used for sending datagram and receiving data packets from key bridge network to key bridge network;
At least one I assembly is used to finish encapsulation and the decapsulation of MAC-in-MAC and carries out the srvice instance mapping;
Or
At least one C-VLAN assembly is used to realize the mapping between C-VID and the I-SID.
20, system as claimed in claim 17 is characterized in that, described MAC-in-MAC edge bridges is supported the C-Tagged service interface, and described C-Tagged service interface is positioned at the user side of described edge bridges.
21, system as claimed in claim 17 is characterized in that, described user's bridge network based on C-VLAN is connected with described MAC-in-MAC edge bridges by the C-Tagged service interface.
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| CNB2006100606731A CN100512193C (en) | 2006-05-11 | 2006-05-11 | City range Ethernet bridge equipment, system and method for providing service to the same |
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| CN101286922B (en) * | 2008-05-05 | 2011-02-09 | 华为技术有限公司 | Signalling control method, system and apparatus |
| CN102187625A (en) * | 2009-03-06 | 2011-09-14 | 华为技术有限公司 | Transport multiplexer - mechanisms to force Ethernet traffic from one domain to be switched in a different (external) domain |
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| CN102355424B (en) * | 2011-10-20 | 2016-06-15 | 神州数码网络(北京)有限公司 | A kind of method and system realizing MIM and VPLS intercommunication forwarding |
| CN102594711B (en) * | 2012-03-28 | 2014-11-26 | 杭州华三通信技术有限公司 | Message forwarding method and edge device therefor |
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