CN102195794B - A kind of fast switch over method of Ethernet trail protection and device - Google Patents
A kind of fast switch over method of Ethernet trail protection and device Download PDFInfo
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Abstract
The invention discloses a kind of fast switch over method and device of Ethernet trail protection, described method comprises: on the end points of protection group, arrange one auxiliary to transmit, described auxiliary transmitting is made up of logic outbound port information and actual outbound port information, and each protection group correspondence one on described end points is auxiliary transmits entry; Transmit according to described assisting, the outbound port information configuration in filtered data base (FDB) entry of the Ethernet switched path (ESP) the entering protection group correspondence of Traffic engineering services example protection group associated becomes logic outbound port information; Data retransmission is carried out according to FDB and auxiliary transmitting; When protection group occur protection switch time, upgrade described auxiliary transmit in actual outbound port information corresponding to this protection group.
Description
Technical field
The present invention relates to network communication technology field, particularly relate to fast switch over method and the device of Ethernet trail protection in a kind of data communication.
Background technology
Along with carrier ethernet (CE, CarrierEthernet) proposition of concept, meeting communication network demand, connection-oriented ethernet technology---operator backbone transmission (PBT, ProviderBackboneTransport) also emerges in October, 2005.After this, domestic and international Jun You operator adopts the networking of PBT technology, for the development of PBT technology in metropolitan area network provides the good beginning.
The basis of PBT technology is the operator backbone bridge joint (PBB of IEEE802.1ah standard definition, ProviderBackboneBridge) technology, IEEE calls PBT technology the operator backbone bridging technology (PBB-TE, ProviderBackboneBridgeTrafficEngineering) supporting traffic engineering.PBB-TE technology is based on PBB technology, its core improves PBB technology, it adopts outer field medium education (MAC) address, and identify in conjunction with outer field VLAN (VLAN) simultaneously, such as key target MAC (Media Access Control) address (B-DA, BackboneDestinationMACaddress)+backbone VLAN mark (B-VID, BackboneVLANID) carries out business forwarding, and forward-path is pre-configured.The forwarding that the address learning mode of this and traditional ethernet carries out data message is very different.By network management and control, the business in CE is made in fact to have connectivity, to realize the function of communication network such as protection switching, service quality (QoS), traffic engineering etc.The framework of PBB-TE technical compatibility traditional ethernet bridge, not needing to carry out renewal to nodes can forward Frame based on B-DA+B-VID, and Frame does not need amendment yet, and forward efficiency is high.
The attribute in tunnel passes through <ESP-DA, ESP-SA, this tlv triple of ESP-VID> represents, in tlv triple, ESP is Ethernet switched path, parameter ESP-DA refers to Ethernet switched path target MAC (Media Access Control) address, and parameter ESP-SA refers to the source MAC of Ethernet switched path, and parameter ESP-VID refers to the value of B-VLAN.The Traffic engineering services example (TESI) of a point-to-point is made up of the ESP of a pair two-way point-to-point.About the specific descriptions of tlv triple and TESI can see IEEE802.1Qay standard.
Figure 1 shows that the schematic diagram adopting Ethernet protecting tunnel in existing PBB-TE technology; for Fig. 1 direction from left to right; the ESP of end-to-end work TESI and Y-B-C-D-X is <B-MAC2, B-MAC1, B-VLAN1>.Wherein, B-MAC2 is the MAC Address of X, is target MAC (Media Access Control) address; B-MAC1 is the MAC Address of Y, is source MAC; B-VLAN1 is the value of the B-VLAN of Y-B-C-D-X.
The 1:1 protection of the end-to-end TESI of existing techniques in realizing.As shown in Figure 1, in end-to-end work TESIY-B-C-X, Y and X is the end points of this TESI; Y-D-X is the protection TESI that the end-to-end protection TESI of this TESI, Y-D-X are Y-B-C-X.Wherein, Y-B-C-X is two-way end-to-end work TESI, Y-D-X is two-way end-to-end protection TESI.Work TESI and protection TESI forms a TE protection group.So when Y-B-C-X detects fault, twocouese can be switched on Y-D-X.And forward on above-mentioned work TESI or above-mentioned protection TESI to distinguish when message repeating; when pre-configured; for the VLAN ID (B-VLAN) that this work TESI and this protection TESI specifies TESI to carry respectively; such as work TESI specifies B-VLAN1, for protection TESI specifies B-VLAN2.
The connectedness of TESI by sending connectivity check messages (CCM, ContinuityCheckMessage) to detect in tunnel, and CCM defines in IEEE802.1ag standard.Send CCM mutually along work TESI and protection TESI respectively between TESI end points, the CCM heading of work TESI and protection TESI encapsulates B-VLAN1 and B-VLAN2 respectively.Can see IEEE802.1Qay standard.
Usually, must carry a large amount of TESI in the infrastructure of composition PBB-TE network, if the infrastructure in network breaks down, then the communication through the TESI of this infrastructure will all be interrupted.If adopt the linear protection of PBB-TE end-to-end TESI, then need to be respectively to carry out detecting through the TESI of this infrastructure and trigger TESI protection end to end and switch.The number of nodes that this protection changing method involves is numerous.Again because be carry out fault detect respectively, a large amount of detection messages will inevitably take more Internet resources, and efficiency is not high.
Therefore, proposing as required to the method that the path of carrying TESI is protected, when breaking down in path, all TESI of process being switched on path for subsequent use.This method is referred to as trail protection, and it can protect a large amount of TESI simultaneously.This trail protection combines with the linear protection of end-to-end TESI, can the reliability of Logistics networks, improves protective efficacy and biological treatability.
Figure 2 shows that the network infrastructure protection model schematic diagram of PBB-TE, the network infrastructure of process that A-B-C-E is end-to-end TESI:TESI-1, TESI-2, TESI-3.Here, so-called network infrastructure refers to: the bridge device in the path of TESI process, exchange line card, cable etc.In Fig. 2, protected object is respectively TESI-1, TESI-2; The network infrastructure of process that A-B-C-E is protected TESI under normal circumstances; A-D-E is backup network infrastructure.That is: A-B-C-E is work entity, and A-D-E is the protection entity of A-B-C-E.Work entity and protection entity form a 1:1 protection group (or claiming protected field), A and E is the end points of protection group.The protected object of this protection group is TESI-1 and TESI-2.After end-point detection to break down to work entity A (P1)-B-C-E (P3) or receives operational order, switch TESI-1 and TESI-2 in this protection group on work entity in protection entity A (P2)-D-E (P4).In Fig. 2, TESI-1, TESI-2, TESI-3 represent with different heavy lines respectively, and TESI-2 is the thickest, and TESI-1 takes second place, and TESI-3 is the thinnest.
Fig. 3 is when after the link failure in work entity A-B-C-E between B and C, and in protected TESI, two-way ESP carries out protecting the embodiment switched.As shown in the figure, configure a protection group, two end points bridges of protection group are A and E.Work entity by TESI-1 in figure under normal circumstances between A and E the network infrastructure along A-B-C-E of process.Protection entity is the network infrastructure along A-D-E.TESI-1 is made up of ESP1 and ESP2, and the direction of ESP1 is Y → X, ESP-DA=X, ESP-SA=Y, ESP-VID=1, and the tlv triple of its correspondence is <X, Y, 1>; The direction of ESP2 is X → Y, ESP-DA=Y, ESP-SA=X, ESP-VID=2, and the tlv triple of its correspondence is <Y, X, 2>; X, Y are the terminal of point-to-point TESI-1.For the preset corresponding forwarding database entry (FDBentry) (FDB is FilteringDatabase, filtered data base) of ESP1 and ESP2 on A, B, C, D, E is as shown in the form above or below figure interior joint in protection group.MAC Address (destinationMACAddress) for the purpose of DA in form, VID is VLAN indications (VLANIdentifier).OutPort refers to transmit port (or being called outbound port, OutboundPort).W refers to work entity, and P refers to protect entity, and wherein P1 → P2 represents in handoff procedure, is switched to P2 port from P1 port; P4 → P5 represents in handoff procedure, is switched to P5 port from P4 port.Entry on intermediate node B, C, D is constant in handoff procedure.Under normal circumstances, on end points bridge A, the outbound port of ESP1 is P1, and corresponding FDBentry is <X, 1> → P1, on end points bridge E, the outbound port of ESP2 is P4, and corresponding FDBentry is <Y, 2> → P4.Suppose the link occurs fault in running between B and C, A, E nodal test is to this fault and trigger automatic protection switching, then end points bridge A need change the outbound port of ESP1 into P2, and corresponding FDBentry is updated to <X, 1> → P2; In like manner end points bridge E need change the outbound port of ESP2 into P5, and corresponding FDBentry is updated to <Y, 2> → P5.Like this, TESI-1 has just been switched on protection entity by from work entity.
As shown in Figure 4, TESI-1, TESI-2 ... TESI-n belongs to some protection groups.A-B-C-E is operating path (i.e. work entity), and A-D-E is the Protection path (namely protecting entity) of A-B-C-E.The port designation of each node is identical with Fig. 3.Under normal circumstances; TESI-1; TESI-2 ... TESI-n passes through from operating path; when there being protection handover event to occur, need by TESI-1, TESI-2 ... TESI-n is switched to Protection path; according to the method that prior figures 3 describes; namely in the terminal A of protection group, by TESI-1, TESI-2 in FDB ... the outbound port of the FDBentry that the Y to the ESP in X-direction that TESI-n is corresponding is corresponding is updated to P2 (as shown in the form of Fig. 4 interior joint A lower left) from P1.In like manner, on end points E, by TESI-1, TESI-2 in FDB ... the outbound port of the FDBentry that the X to the ESP in Y-direction that TESI-n is corresponding is corresponding is updated to P5 (as shown in the bottom-right form of Fig. 4 interior joint E) from P4.When the value of n is very large, each end points needs the outbound port information upgrading n FDBentry one by one, therefore needs the time of at substantial.
Summary of the invention
The technical problem to be solved in the present invention proposes a kind of Ethernet trail protection fast switch over method and device exactly, improves the speed that FDBentry upgrades.
In order to solve the problems of the technologies described above, the invention provides a kind of fast switch over method of Ethernet trail protection, comprising:
The end points of protection group arranges one auxiliary to transmit, described auxiliary transmitting is made up of logic outbound port information and actual outbound port information, and corresponding one of each protection group on described end points auxiliaryly transmits entry; Transmit according to described assisting, the outbound port information configuration in filtered data base (FDB) entry of the Ethernet switched path (ESP) the entering protection group correspondence of Traffic engineering services example protection group associated becomes logic outbound port information;
Data retransmission is carried out according to FDB and auxiliary transmitting; When protection group occur protection switch time, upgrade described auxiliary transmit in actual outbound port information corresponding to this protection group.
Further, said method also can have following characteristics:
Protection group is made up of a work entity and one or more protection entity, and each protection group is associated with one group of Traffic engineering services example; Work entity and the relevant port of protection physical arrangements, described associated ports is actual outbound port.
Further, said method also can have following characteristics:
Described logic outbound port information is logic outbound port number, and described actual outbound port information is actual outbound port number.
Further, said method also can have following characteristics:
Described according to FDB with auxiliary transmit the step of carrying out data retransmission and specifically comprise:
For the ESP entering protection group of each Traffic engineering services example, inquiry FDB, obtains the logic outbound port information that described ESP is corresponding;
According to the logic outbound port information obtained, inquiry is auxiliary transmits, and obtains actual outbound port information, carries out data retransmission according to actual outbound port.
Further, said method also can have following characteristics:
Described renewal described auxiliary transmit in actual outbound port information corresponding to the protection group that switches specifically refer to:
Be the outbound port information enlivening entity associated after protection switches by actual outbound port information updating corresponding for the protection group switched in auxiliary transmitting.
In order to solve the problems of the technologies described above, the invention provides a kind of apparatus for fast switching of Ethernet trail protection, being applied to the end points of protection group, comprising configuration module and forwarding module;
Described configuration module is used for arranging one and auxiliaryly transmits, transmit according to described assisting, the outbound port information configuration in FDB entry corresponding for the ESP entering protection group of the Traffic engineering services example of protection group association on described end points is become logic outbound port information; And, when protection group occur protection switch time, upgrade described auxiliary transmit in actual outbound port information corresponding to the protection group that switches;
Described forwarding module is used for carrying out data retransmission according to FDB and auxiliary transmitting;
Wherein, described auxiliary transmitting is made up of logic outbound port information and actual outbound port information, and each protection group correspondence one on described end points is auxiliary transmits entry.
Further, said apparatus also can have following characteristics:
Protection group is made up of a work entity and one or more protection entity, and each protection group is associated with one group of Traffic engineering services example; Work entity and the relevant port of protection physical arrangements, described associated ports is actual outbound port.
Further, said apparatus also can have following characteristics:
Described logic outbound port information is logic outbound port number, and described actual outbound port information is actual outbound port number.
Further, said apparatus also can have following characteristics:
Described forwarding module is further used for the ESP entering protection group for each Traffic engineering services example, and inquiry FDB, obtains the logic outbound port information that described ESP is corresponding; According to the logic outbound port information obtained, inquiry is auxiliary transmits, and obtains actual outbound port information, carries out data retransmission according to actual outbound port.
Further, said apparatus also can have following characteristics:
Described configuration module is further used for being the outbound port information enlivening entity associated after protection switches by actual outbound port information updating corresponding for the protection group switched in auxiliary transmitting.
Adopt the present invention, no matter in protection group, Traffic engineering services example quantity has how many, when carrying out protection and switching, all need to upgrade and assist an entry in transmitting.Substantially increase the speed that protection switches.
Accompanying drawing explanation
Fig. 1 is that the end-to-end TESI of PBB-TE1:1 protects schematic diagram;
Fig. 2 is the network infrastructure protection model schematic diagram of PBB-TE;
Fig. 3 is that after protection group link failure, two-way ESP carries out protecting the schematic diagram switched;
Fig. 4 is that after protection group node failure, many TESI protect handover operation schematic diagram;
Fig. 5 is the apparatus for fast switching schematic diagram of the embodiment of the present invention;
Fig. 6 is the configuration module implementation flow chart of the embodiment of the present invention;
Fig. 7 is the flow chart of the forwarding data process of the embodiment of the present invention;
Fig. 8 is the schematic diagram of application example of the present invention.
Embodiment
Basic thought of the present invention is: by setting up auxiliary transmitting, to improve speed and the switch speed of FDBentry renewal.
Particularly, comprising:
The end points of protection group arranges one auxiliary to transmit, described auxiliary transmitting is made up of logic outbound port information and actual outbound port information, and each protection group correspondence one on described end points is auxiliary transmits entry (a logic outbound port and an actual outbound port); Transmit according to described assisting, the outbound port information configuration in FDB entry corresponding for the ESP entering protection group of the TESI of protection group association on described end points is become logic outbound port information;
Data retransmission is carried out according to FDB and auxiliary transmitting; When protection group occur protection switch time, upgrade described auxiliary transmit in actual outbound port information corresponding to the protection group that switches.
Wherein, protection group is made up of a work entity and one or more protection entity, and each protection group is associated with one group of Traffic engineering services example.The path of process that work entity is this group Traffic engineering services example under normal circumstances, protection entity is corresponding with work entity.Work entity and protection entity have identical end points, and work entity and protection entity respectively have an associated ports on an end points, and this associated ports is the actual outbound port in auxiliary transmitting.
The work entity of this group Traffic engineering services example of actual bearer or protection entity are active (active) entity; accordingly; in protection group other transmission entities be (standby) for subsequent use entity (such as; work entity is for enlivening entity under normal circumstances, and protection entity is standby entity.After once protection switches in generation, protection entity is for enlivening entity, and work entity is standby entity).
Described logic outbound port information is logic outbound port number, and described actual outbound port information is actual outbound port number.
Describedly carry out data retransmission specifically comprise according to FDB and auxiliary transmitting:
For the ESP entering protection group of each Traffic engineering services example, inquiry FDB, obtains the logic outbound port information that the ESP entering protection group of described Traffic engineering services example association is corresponding; According to the logic outbound port information obtained, inquiry is auxiliary transmits, and after obtaining actual outbound port information, carries out data retransmission according to actual outbound port.
When there is protection handover event; one group of Traffic engineering services example of association is switched to protection entity from work entity; or return to work entity from protection entity; at this moment, need be by actual outbound port information updating corresponding for the protection group switched in auxiliary transmitting only the outbound port information enlivening entity associated after protection switches.
FDB is FilteringDatabase, consistent with the definition in IEEE802.1Q.
Below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
As shown in Figure 5, be the apparatus for fast switching schematic diagram of the Ethernet trail protection of the embodiment of the present invention, this application of installation, in the end points of protection group, comprises configuration module and forwarding module;
Described configuration module is used for arranging one and auxiliaryly transmits, and auxiliaryly to transmit, the outbound port information configuration in FDB entry corresponding for the ESP entering protection group of the TESI of protection group association on described end points is become logic outbound port information according to described; And, when protection group occur protection switch time, upgrade described auxiliary transmit in actual outbound port information corresponding to the protection group that switches;
Described forwarding module is used for carrying out data retransmission according to FDB and auxiliary transmitting;
Wherein, described auxiliary transmitting is made up of logic outbound port information and actual outbound port information, and each protection group correspondence one on described end points is auxiliary transmits entry.
Described forwarding module is further used for the ESP entering protection group for each Traffic engineering services example association, and inquiry FDB obtains the logic outbound port information that the ESP entering protection group of described Traffic engineering services example association is corresponding; According to the logic outbound port information obtained, inquiry is auxiliary transmits, and obtains actual outbound port information, carries out data retransmission according to actual outbound port.
Described configuration module is further used for being the outbound port information enlivening entity associated after protection switches by actual outbound port information updating corresponding for the protection group switched in auxiliary transmitting.
As shown in Figure 6, be the configuration module implementation flow chart of the embodiment of the present invention, comprise the steps:
Step 601, starts;
Step 602, sets up protection group, each protection group is associated with one group of Traffic engineering services example
Step 603, be respectively the work entity in protection group and protection physical arrangements associated ports, this associated ports is actual outbound port;
Step 604, sets up one and auxiliary to transmit, and auxiliary transmitting is made up of logic outbound port number and actual outbound port number, and corresponding one of each protection group auxiliaryly transmits entry;
Step 605, Outport protection group associated in FDB entry corresponding to the ESP entering protection group of TESI is configured to logic outbound port number;
Has step 606, judged whether that protection handover event occurs? if it is step 607 is forwarded to, otherwise, return step 606;
Step 607, actual outbound port number corresponding for this protection group in auxiliary transmitting is updated to the port numbers enlivening entity associated after protection switches, thus one group of Traffic engineering services example of association is switched to protection entity from work entity, or return to work entity from protection entity;
Step 608, terminates.
As shown in Figure 7, be the flow chart of the forwarding data process of the embodiment of the present invention, comprise the steps:
Step 701, obtains the information of Traffic engineering services example;
Step 702, according to the target MAC (Media Access Control) address entering the ESP of protection group and the VID of the association of Traffic engineering services example, looks into FDB and finds corresponding logic outbound port number;
Step 703, searches auxiliary transmitting according to logic outbound port number, finds actual outbound port number;
Step 704, forwards according to actual outbound port.
Application example of the present invention shown in Fig. 8, TESI-1, TESI-2 ... TESI-n belongs to some protection group IPG_1.A-B-C-E is operating path, and A-D-E is the Protection path of A-B-C-E.The port designation of each node is identical with Fig. 4.Under normal circumstances, TESI-1, TESI-2 ... TESI-n passes through from operating path.The FDB of the configuration on protection group intermediate node B, C, D transmits identical with Fig. 4.The FDB of the terminal A of protection group transmits the Table A-1 below as figure interior joint; TESI-1 in Table A-1; TESI-2 ... Y → the X of TESI-n is to the FDB entry <X of ESP; 1>, <X; 3> ... <X; the OutPort that 2n-1> is corresponding is all configured to logical port number LOGIC_1, and the indications IPG_1 of this logical port number and protection group is one to one.Table A-2 is auxiliary transmitting, and assists in transmitting and includes LogicalPort and Outport two fields, respectively counterlogic port numbers and actual outbound port number, and the outbound port that LOGIC_1 is corresponding is the associated ports P1 of operating path.The configuration information of end points E and the configuration information of terminal A similar, repeat no more.
Suppose that terminal A detects that the Node B in operating path breaks down, the end points of protection group need by TESI-1, TESI-2 ... TESI-n is switched to Protection path from operating path, now only need transmit auxiliary the associated ports P2 that the corresponding outbound port number of LOGIC_1 in A-2 is updated to Protection path; In like manner transmit auxiliary the associated ports P5 that the corresponding outbound port number of LOGIC_1 in E-2 is updated to Protection path, the renewal of address table can be completed.
It should be noted that, in the present invention, " protection group " also can be referred to as " protected field ".In the present invention the path described in " Ethernet trail protection " can be end-to-end flux Engineering Service example the part path of process, also can be end-to-end flux Engineering Service example the complete path of process.Namely the Traffic engineering services example associated with protection group may terminate on the end points of protection group, also may not terminate on the end points of protection group.Can switch according to by information and executing protections such as failure detection result, operational order, state and certain priority algorithms.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (8)
1. a fast switch over method for Ethernet trail protection, based on the operator backbone bridging technology PBB-TE technology supporting traffic engineering, comprising:
The end points of protection group arranges one auxiliary to transmit, described auxiliary transmitting is made up of logic outbound port information and actual outbound port information, and corresponding one of each protection group on described end points auxiliaryly transmits entry; Transmit according to described assisting, the outbound port information configuration in filtered data base FDB entry corresponding for the Ethernet switched path ESP entering protection group of the Traffic engineering services example of protection group association is become logic outbound port information;
Carry out data retransmission according to FDB and auxiliary transmitting, comprising: for the ESP entering protection group of each Traffic engineering services example, inquiry FDB, obtains the logic outbound port information that described ESP is corresponding; According to the logic outbound port information obtained, inquiry is auxiliary transmits, and obtains actual outbound port information, carries out data retransmission according to actual outbound port;
When protection group occur protection switch time, upgrade described auxiliary transmit in actual outbound port information corresponding to this protection group.
2. the method for claim 1, is characterized in that,
Protection group is made up of a work entity and one or more protection entity, and each protection group is associated with one group of Traffic engineering services example; Work entity and the relevant port of protection physical arrangements, described associated ports is actual outbound port.
3. the method for claim 1, is characterized in that,
Described logic outbound port information is logic outbound port number, and described actual outbound port information is actual outbound port number.
4., as the method in claims 1 to 3 as described in any one, it is characterized in that,
Described renewal described auxiliary transmit in actual outbound port information corresponding to the protection group that switches specifically refer to:
Be the outbound port information enlivening entity associated after protection switches by actual outbound port information updating corresponding for the protection group switched in auxiliary transmitting.
5. an apparatus for fast switching for Ethernet trail protection, based on the operator backbone bridging technology PBB-TE technology supporting traffic engineering, is applied to the end points of protection group, it is characterized in that, comprise configuration module and forwarding module;
Described configuration module is used for arranging one and auxiliaryly transmits, transmit according to described assisting, the outbound port information configuration in filtered data base FDB entry corresponding for the Ethernet switched path ESP entering protection group of the Traffic engineering services example of protection group association on described end points is become logic outbound port information; And, when protection group occur protection switch time, upgrade described auxiliary transmit in actual outbound port information corresponding to the protection group that switches;
Described forwarding module is used for carrying out data retransmission according to FDB and auxiliary transmitting, and comprising: for the ESP entering protection group of each Traffic engineering services example, inquiry FDB, obtains the logic outbound port information that described ESP is corresponding; According to the logic outbound port information obtained, inquiry is auxiliary transmits, and obtains actual outbound port information, carries out data retransmission according to actual outbound port;
Wherein, described auxiliary transmitting is made up of logic outbound port information and actual outbound port information, and each protection group correspondence one on described end points is auxiliary transmits entry.
6. device as claimed in claim 5, is characterized in that,
Protection group is made up of a work entity and one or more protection entity, and each protection group is associated with one group of Traffic engineering services example; Work entity and the relevant port of protection physical arrangements, described associated ports is actual outbound port.
7. device as claimed in claim 5, is characterized in that,
Described logic outbound port information is logic outbound port number, and described actual outbound port information is actual outbound port number.
8., as the device in claim 5 ~ 7 as described in any one, it is characterized in that,
Described configuration module is further used for being the outbound port information enlivening entity associated after protection switches by actual outbound port information updating corresponding for the protection group switched in auxiliary transmitting.
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| CN112039766B (en) * | 2020-09-04 | 2022-08-02 | 苏州盛科通信股份有限公司 | Protection switching implementation method and device based on Ethernet |
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| CN101364926A (en) * | 2007-08-08 | 2009-02-11 | 华为技术有限公司 | Method and apparatus for network protection |
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| CN1805408A (en) * | 2005-01-14 | 2006-07-19 | 华为技术有限公司 | Quick route switching method and apparatus for network node devices |
| CN101326791A (en) * | 2005-10-14 | 2008-12-17 | 北方电讯网络有限公司 | Gmpls control of ethernet |
| CN101364926A (en) * | 2007-08-08 | 2009-02-11 | 华为技术有限公司 | Method and apparatus for network protection |
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