CN102332987B

CN102332987B - A kind of method and system of pseudo-wire OAM attribute configuration

Info

Publication number: CN102332987B
Application number: CN201010231037.7A
Authority: CN
Inventors: 张飞
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Filing date: 2010-07-12
Publication date: 2016-11-30
Anticipated expiration: 2030-07-12

Abstract

The invention provides the collocation method of a kind of pseudo-wire operation management maintainance attribute, including: during pseudo-wire is dynamically set up, mutual signaling between provider edge (PE), the parameter that pseudo-wire operation management maintainance (OAM) attribute configuration is relevant is carried in described signaling, the parameter that signaling recipient is correlated with according to described OAM attribute configuration, it is achieved OAM attribute configuration.The present invention also provides for the configuration system of a kind of pseudo-wire operation management maintainance attribute.By increasing the negotiation of the ability of the PW OAM of new extension, and add the flow process of an OAM attribute configuration, the PW OAM attribute of proactive can have been configured during set up PW by signaling, simplified webmaster operation.

Description

A kind of method and system of pseudo-wire OAM attribute configuration

Technical field

The present invention relates to data network communications field, particularly relate to a kind of at MPLS (Multiple Protocol Label Switching, multiprotocol label switching) and MPLS-TP (Multiple Protocol Label Switching-Transport Profile, the multiprotocol label switching based on transmitting the network architecture) network is joined Put the method and system of pseudo-wire OAM.

Background technology

Along with the development of IP data network, the expanding of IP network itself, scalable and compatible intercommunication energy Power is very strong, and the upgrading of traditional communication network, extension, the motility of intercommunication then compare poor, It is limited to mode and the type of business of transmission, and newly-built network commonality is the most poor, be unsuitable for mutually Siphunculus is managed.Therefore, during traditional communication network faces upgrading, expansive approach, it is each to set up weight Multiple network, still makes full use of existing or public resource and gets to the purpose of upgrade of network and expanded application, And how to get to this target, it is that everybody is in the problem considered.PWE3(Pseudowire Emulation Edge to Edge, Pseudo Wire Emulation Edge-to-Edge) just for solving conventional communication networks with existing One of method that packet network combines and proposes.

PWE3 is one two layer service bearing technology end to end, belongs to the L2VPN of point to point system (Layer 2Virtual Private Networks, 2 layers of virtual private networks).At PSN (Packet Switched Network, packet switching network) two PE (Provider Edge, it is provided that business edge) In equipment, it is with LDP/RSVP (Label Distribution Protocal/Resource ReserVation Protocal, Label Distribution Protocol/RSVP) as signaling, (it is probably MPLS by tunnel Tunnel, GRE, L2TPv3 or other) simulation CE (Customer Edge, customer edges) hold each Plant two layer services, such as ATM (Asynchronous Transfer Mode, asynchronous transfer mode), TDM (Time DivisionMultiplexing, time division multiplex), FR (Frame Relay, frame relay) etc., Make Layer 2 data transparent transmission in PSN network of CE end.

Pseudo-wire (PseudoWire, PW) can be divided into single-hop pseudo-wire and multi-hop counterfeit wire.SS-PW(Single Segment Pseudowires, single-hop pseudo-wire), refer to directly set up PW between two PE, middle Not by other switching node, in Fig. 1, the PW set up between PE1 and PE2.MS-PW (Multi-Segment Pseudowires, multi-hop counterfeit wire), is at two PE (T-PE, Terminating ProviderEdge, terminate PE) between create PW need through one or more intermediate nodes (claim For exchange PE, i.e. S-PE, Switching PE), as shown in Figure 2 between T-PE1 and T-PE2 Setting up a MS-PW, through an intermediate node between T-PE1 and T-PE2, this node is referred to as Switching node S-PE, T-PE1 and T-PE2 are referred to as terminal node T-PE.SS-PW's and MS-PW Process of dynamically setting up uses LDP (Label Distribution Protocol, tag distribution protocol), SS-PW The mode set up can be based on RFC4447；And the process of setting up of MS-PW is referred to Draft-ietf-pwe3-dynamic-ms-pw etc..

At present, at PW OAM (Operation Administration and defined in PWE3 working group Maintenance, operation management maintainance) realization mechanism, be mainly used in the detection of PW fault, notice. These mechanism have PW OAM message mapping (mapping of PW OAM message), ethernet (with Too net) and the intercommunication of PW OAM, VCCV (Virtual C ircuit Connectivity Verification, Virtual circuit connectivity confirms), PW Status TLV (PW state advertisement).Above two kinds of technical sides Case defines and how to realize between two layer service OAM and PW OAM mapping and intercommunication, and VCCV is then The detection of connectivity mechanism of PW, defines 3 kinds of VCCV message: ICMP Ping, BFD and LSP Ping； PW Status TLV is for noticing the state of PW and AC link.

But, in a transport network, above-mentioned OAM is machine-processed or far from being enough.To this end, MPLS-TP Extending the OAM(Operation Administration Maintenance) of PW, (performance measurement, performance is surveyed to add PM Amount), FMS (fault management signal, mistake management signal), Diagnostic Test (examines Disconnected test) etc..Wherein PM includes that Packet Loss (packet loss) measures and Packet Delay (bag Postpone) to measure, the packet loss in test network and packet delay, FMS is then service layer MEP (maintenance end point, safeguard end node), as an intermediate node of client layer, is passing through A FMS signal is inserted, up and down to inform client layer MEP in the client layer transmission path in service layer's transmission path Some information of service layer, can be divided into AIS (alarm indication signal, alarm indication signal), LDI (linkdown indication, link failure indicates), LR (lockreporting, locking instruction) Deng；Diagnostic Test be then divided into two kinds of Data plane loopback (datum plane loopback) and Throughput estimation (testing throughput), data surface loopback is for the forwarding of test data plane Behavior is the most normal, and testing throughput is then the bandwidth for test path.

All of OAM(Operation Administration Maintenance) can divide into two kinds, proactive (actively) and on-demand (on-demand).The OAM(Operation Administration Maintenance) of Proactive type refers to after PW is successfully established, these OAM Function is i.e. run, and is continued until the dismounting of PW, comprises VCCV BFD, PM Loss/Delay, FMS, PW status etc..This merit is run in certain time period that on-demand is then after PW sets up Can, comprise LSP ping, PM Loss/Delay, Diagnostic test etc..These OAM(Operation Administration Maintenance)s are permissible By webmaster static configuration, it is also possible to by LSP ping or control planar configuration.Control planar configuration During OAM attribute, OAM attribute can be configured while building PW, it is to avoid OAM attribute Configuration and the foundation of PW divide into two processes, the OAM being particularly well-suited to proactive type joins Put, simplify handling process.Manuscript draft-ietf-ccamp-oam-configuration-fwk, Draft-ietf-ccamp-rsvp-te-mpls-tp-oam-ext covers the configuration of OAM attribute on LSP, but It is that on current PW, the configuration of OAM attribute is also not carried out scheme.

Summary of the invention

In view of this, offer one is provided and controls planar configuration PW proactive The method and system of OAM attribute, it is adaptable to SS-PW and MS-PW dynamically set up；Provide one Plant the method and system of LSP ping configuration PW proactive attribute, it is adaptable to dynamic and/or static state is built Vertical SS-PW and MS-PW.

In order to solve the problems referred to above, the invention provides the configuration side of a kind of pseudo-wire operation management maintainance attribute Method, including:

During pseudo-wire is dynamically set up, it is provided that mutual signaling between business edge (PE), in described signaling In carry the parameter that pseudo-wire operation management maintainance (OAM) attribute configuration is relevant, signaling recipient is according to institute State the parameter that OAM attribute configuration is relevant, it is achieved OAM attribute configuration.

Further, said method also can have the characteristics that,

Described PE includes originating end T-PE and opposite end T-PE；Described signaling recipient includes originating end T-PE With opposite end T-PE, between described PE, the step of mutual signaling includes:

Described originating end T-PE sends signaling to downstream node, carries OAM attribute and join in described signaling Putting relevant parameter, described downstream node is exchange provider edge (S-PE) or described opposite end T-PE；

Described opposite end T-PE receives from described originating end T-PE or exchange provider edge (S-PE) When carrying the signaling of described OAM attribute configuration relevant parameter, if not accepting or have modified one of which Or many kinds of parameters, carry, by signaling, the parameter that OAM attribute configuration is relevant, inform described originating end T-PE The parameter that described opposite end T-PE supports.

Further, said method also can have the characteristics that,

Described originating end T-PE also carries OAM capability negotiation parameter in described signaling, informs that downstream is saved The OAM ability that the described T-PE of point supports；

Described opposite end T-PE receives from described originating end T-PE or exchange provider edge (S-PE) During described OAM capability negotiation parameter, if not supporting one or more of which OAM ability, pass through Signaling carries OAM capability negotiation parameter, informs what opposite end T-PE described in described originating end T-PE supported OAM ability.

Further, said method also can have the characteristics that,

The downstream node of described originating end T-PE carries, described in receiving, the parameter that OAM attribute configuration is relevant Signaling time, configuration MIP attribute or MEP attribute.

The present invention also provides for the collocation method of a kind of pseudo-wire operation management maintainance attribute, including: build in pseudo-wire After standing successfully, it is provided that mutual LSP ping message between business edge (PE), report at described LSP ping Carrying the parameter that pseudo-wire OAM attribute configuration is relevant in literary composition, message recipient is according to described OAM attribute The parameter that configuration is relevant, it is achieved OAM attribute configuration.

Further, said method also can have the characteristics that,

Described PE includes originating end T-PE and opposite end T-PE；Described signaling recipient includes originating end T-PE With opposite end T-PE；Between described PE, the step of mutual LSP ping message includes:

Described originating end T-PE transmission LSP ping message is to downstream node, at described LSP ping message In carry the parameter that OAM attribute configuration is relevant, described downstream node is exchange provider edge (S-PE) Or described opposite end T-PE；

Opposite end T-PE receives OAM attribute configuration phase from described originating end T-PE or described S-PE During related parameter, if not accepting or have modified one or more of which parameter, taken by LSP ping message With the parameter that OAM attribute configuration is relevant, inform what opposite end T-PE described in described originating end T-PE supported Parameter.

Further, said method also can have the characteristics that,

Described originating end T-PE also carries OAM capability negotiation parameter in described LSP ping message, Inform the OAM ability that T-PE described in downstream node supports；

Described opposite end T-PE receives from described originating end T-PE or exchange provider edge (S-PE) During OAM capability negotiation parameter, if not supporting one or more of which OAM ability, by LSP ping Message carries OAM capability negotiation parameter, informs what opposite end T-PE described in described originating end T-PE supported OAM ability.

The present invention also provides for the configuration system of a kind of pseudo-wire operation management maintainance, and described system includes originating end T-PE and opposite end T-PE, wherein:

Described originating end T-PE, is used for during pseudo-wire is dynamically set up, and the mutual signaling of opposite end T-PE, The parameter that pseudo-wire operation management maintainance (OAM) attribute configuration is relevant is carried, according to institute in described signaling State the parameter that OAM attribute configuration is relevant, it is achieved OAM attribute configuration.

Further, said system also can have the characteristics that,

Described originating end T-PE, is used for sending signaling to downstream node, carries OAM in described signaling The parameter that configuration is relevant, described downstream node is exchange provider edge (S-PE) or described opposite end T-PE；

Described opposite end T-PE, for from described originating end T-PE or exchange provider edge (S-PE) When receiving OAM attribute configuration relevant parameter, if not accepting or changing one or more of which Parameter, carries, by signaling, the parameter that OAM attribute configuration is relevant, informs described in described originating end T-PE The parameter that opposite end T-PE supports.

Further, said system also can have the characteristics that,

Described originating end T-PE, is additionally operable to carry OAM capability negotiation parameter in described signaling, informs The OAM ability that T-PE described in downstream node supports；

Described opposite end T-PE, is additionally operable to from described originating end T-PE or exchange provider edge (S-PE) When receiving OAM capability negotiation parameter, if not supporting one or more of which OAM ability, logical Cross signaling and carry OAM capability negotiation parameter, inform that opposite end T-PE described in described originating end T-PE supports OAM ability.

Further, said system also can have the characteristics that,

Described opposite end T-PE, is additionally operable to described in receiving carry the letter of the relevant parameter of OAM attribute configuration When making, configure MEP attribute.

Further, said system also can have the characteristics that,

Described system also includes S-PE, described S-PE, for from upstream node receive described signaling or During LSP ping message, being transmitted to downstream node, node receives described signaling or LSP ping downstream During message, it is transmitted to upstream node.

Further, said system also can have the characteristics that,

Described S-PE be additionally operable to receive described in when carrying the signaling of the relevant parameter of OAM configuration, configuration MIP attribute.

Described originating end T-PE, is used for after pseudo-wire is successfully established, and the described mutual LSP of opposite end T-PE Ping message, carries the parameter that pseudo-wire OAM attribute configuration is relevant, root in described LSP ping message The parameter relevant according to described OAM attribute configuration realizes OAM attribute configuration.

Further, said system also can have the characteristics that,

Described originating end T-PE, is used for sending LSP ping message to downstream node, at described LSP ping Carrying the parameter that OAM attribute configuration is relevant in message, described downstream node is exchange provider edge Or described opposite end T-PE (S-PE)；

Described opposite end T-PE, belongs to for receiving OAM from described originating end T-PE or described S-PE Property configuration relevant parameter time, if not accepting or change one or more of which parameter, pass through LSP Ping message carries the parameter that OAM attribute configuration is relevant, informs opposite end described in described originating end T-PE The parameter that T-PE supports.

Further, said system also can have the characteristics that,

Described originating end T-PE, is additionally operable to carry OAM capability negotiation ginseng in described LSPping message Number, informs the OAM ability that T-PE described in downstream node supports；

Described opposite end T-PE, is additionally operable to from described originating end T-PE or exchange provider edge (S-PE) When receiving OAM capability negotiation parameter, if not supporting one or more of which OAM ability, logical Cross LSP ping message and carry OAM capability negotiation parameter, inform opposite end described in described originating end T-PE The OAM ability that T-PE supports.

In the present invention program, by increasing the negotiation of the ability of the PW OAM of new extension, and add The flow process of one OAM attribute configuration, can be configured during set up PW by signaling The PW OAM attribute of proactive, simplifies webmaster operation；Or by carrying in LSP ping The negotiation of the ability of PW OAM, and add the flow process of an OAM attribute configuration, can build at PW Configure the PW OAM attribute of proactive after standing successfully, be more applicable for quiescent state establishment or sound knot Build vertical PW jointly.

Accompanying drawing explanation

Fig. 1 is SS-PW schematic diagram；

Fig. 2 is MS-PW schematic diagram；

Fig. 3 is the PW OAM attribute configuration schematic diagram of the embodiment of the present invention one；

Fig. 4 is the PW OAM attribute configuration flow process of the embodiment of the present invention one；

Fig. 5 is the PW OAM attribute configuration schematic diagram of the embodiment of the present invention two；

Fig. 6 is the PW OAM attribute configuration flow process of the embodiment of the present invention two.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, by the following examples and join According to accompanying drawing, the present invention is described in more detail.

In the present invention, carry out extended below:

1. in consulting in the initialization Mapping message of LDP, increase the PW of MPLS-TP extension The negotiation of OAM ability, or, in LSP ping message, carry out this extension.

2. the TLV of one PW OAM configuration of extension, is used for configuring PW OAM attribute, carries In Mapping message, or, in LSP ping message, carry out this extension.

The present invention provides the collocation method of a kind of pseudo-wire operation management maintainance attribute, including:

During pseudo-wire is dynamically set up, it is provided that mutual signaling between business edge (PE), in described signaling In carry the parameter that pseudo-wire operation management maintainance (OAM) attribute configuration is relevant, belong to according to described OAM Property the relevant parameter of configuration realize OAM attribute configuration；

Or, after pseudo-wire is successfully established, mutual LSPping message between PE, at described LSP ping Carrying the parameter that pseudo-wire OAM attribute configuration is relevant in message, signaling recipient belongs to according to described OAM Property the relevant parameter of configuration realize OAM attribute configuration.

Specifically, described PE includes that originating end T-PE and opposite end T-PE, described signaling recipient include Originating end T-PE and opposite end T-PE, between described PE, the step of mutual signaling includes:

Described opposite end T-PE receives from described originating end T-PE or exchange provider edge (S-PE) During OAM attribute configuration relevant parameter, if not accepting or changing one or more of which parameter, Carry, by signaling, the parameter that OAM attribute configuration is relevant, inform opposite end described in described originating end T-PE The parameter that T-PE supports.

Further, described originating end T-PE also carries OAM capability negotiation parameter in described signaling, Inform the OAM ability that T-PE described in downstream node supports；

Described opposite end T-PE receives from described originating end T-PE or exchange provider edge (S-PE) During OAM capability negotiation parameter, if not supporting one or more of which OAM ability, taken by signaling Band OAM capability negotiation parameter, informs the OAM that opposite end T-PE described in described originating end T-PE supports Ability.

Further, the downstream node of described originating end T-PE receive described in carry OAM attribute configuration During the signaling of relevant parameter, configuration MIP attribute or MEP attribute, wherein, S-PE receives described When carrying the signaling of the relevant parameter of OAM attribute configuration, configuring MIP attribute, T-PE receives described When carrying the signaling of the relevant parameter of OAM attribute configuration, configure MEP attribute.

Wherein, described PE includes originating end T-PE and opposite end T-PE, mutual LSP ping between described PE The step of message includes:

Opposite end T-PE receives OAM attribute configuration phase from described originating end T-PE or described S-PE During related parameter, if not accepting or changing one or more of which parameter, by LSP ping message Carry the parameter that OAM attribute configuration is relevant, inform that opposite end T-PE described in described originating end T-PE supports Parameter.

Further, described originating end T-PE also can carry OAM in described LSP ping message Capability negotiation parameter, informs the OAM ability that T-PE described in downstream node supports；

Embodiment one: LDP configures PW OAM attribute

In the present embodiment, multi-segment pseudo-wires has a S-PE, sees Fig. 3.T-PE1 initiates signaling and sets up MS-PW, LDP Mapping (mapping) message carries the relevant ginseng of PW OAM capability negotiation Number and the relevant parameter of PW OAM attribute configuration.The process of PW OAM capability negotiation is as follows, reference Fig. 4, including:

T-PE1, according to the PW OAM ability oneself supported, tells S-PE and the T-PE node in downstream, Oneself support these OAM abilities.Such as, T-PE1 can inform downstream in VCCV capability advertisement CC (control channel, the control passage) type supported of node oneself, CV (connectivity Verification, Connectivity Verification) type；If T-PE1 supports PW state advertisement, just at Mapping The upper PW Status TLV of band in message, informs that downstream node oneself supports PW state advertisement.Here MPLS-TP adds many new types to PW OAM, such as PM Loss, PM Delay, FMS, Lock Instruct, Diagnostic test etc., the node oneself in T-PE1 downstream to be informed supports these OAM ability.The PW OAM capability advertisement newly increased can be carried by the following method:

Extend a MPLS-TP PW OAM capability TLV, carry the OAM oneself supported Ability, the implication of three flag bits that such as can define is as follows:

L:packet loss；D:packet delay；F:FMS

If set (is 1), illustrate that T-PE1 node supports this OAM ability, if resetted (i.e. It is 0), illustrate that T-PE1 node does not support this OAM ability.

Certainly, the PW OAM of the proactive of three kinds of MPLS-TP extensions is merely just listed, not Extension, the OAM ability of such as On-demand, such as performance measurement/diagnostic test/locking etc., Or it is extension in the future, instruction can be carried by this TLV.It addition, here can also be with other TLV or extend existing TLV to show T-PE1 node supports the OAM ability of which newly extension, These should be within the scope of the present invention.

It addition, T-PE1 is downstream sending Mapping message when, it is also possible to lead to without this ability Accusing, acquiescence is all supported.

After the S-PE/T-PE in downstream receives Mapping message, check this TLV, if do not recognize or Person does not supports, then PW then sets up unsuccessful；If understanding, then downstream or opposite end send The reset those do not supported in Mapping message, only retains those fields supported.

Finally, each S-PE/T-PE node all can know opposite end supports the PW OAM energy of which newly extension Power.

The carrying process of the relevant parameter of PW OAM configuration is as follows:

T-PE1, according to the PW OAM ability oneself supported, carries MPLS-TP in Mapping message PW OAM configuration TLV, illustrates the parameter oneself being correlated with for those OAM attribute configuration, Here 4 kinds are defined, respectively VCCV BFD, PM/Loss, PM/Delay, FMS, more Extension should be also within spirit of the present invention.These positions, attribute mark position then illustrate to configure corresponding ginseng Number, it is necessary to carry corresponding sub-TLV；Reset and then need not the parameter that configuration is relevant, i.e. need not carry Corresponding sub-TLV.

If VCCV BFD to be configured, then the version of BFD to be consulted, PHB between two T-PE (per hop behavior, hop behavior), Local discriminator (local identifier), send Frequency, receives the relevant parameters such as frequency.These parameters may all need to consult, it is also possible to simply association Business's part therein, carries in corresponding sub-TLV.Such as, T-PE1 node can bring T-PE2 The local identifier of node oneself local terminal, and after T-PE2 obtains this this locality identifier, can send out at T-PE2 To the local identifier issuing T-PE1 oneself local terminal in the mapping message of T-PE1, then T-PE1 All can have oneself local terminal and opposite end local identifier with T-PE2, can come with this identifier unique Identify a BFD session；Certainly, this parameter is optional, i.e. T-PE1 and T-PE2 can consult Local identifier can not also be consulted.The same BFD also having transmission frequency/reception frequency/fault to cause State down time etc., T-PE1 issue T-PE2 oneself receptible transmission frequency/reception frequency Maximum, and the shortest time of BFD state down；After T-PE2 checks, if accepting same Value, then this value is constant, feedbacks in T-PE2 issues the Mapping message of T-PE1；If T-PE2 finds that transmission frequency/reception frequency is too fast or/and the time of BFD state down is the shortest, just returns Return a slower frequency or/and the longer BFD state down time is to T-PE1；When BFD parameter Consulting successfully, after BFD functional configuration completes, two ends just send with this new frequency and receive BFD Message, works in coordination with the pretection switch at two ends with the longer BFD state down time.

If PM Loss to be configured, then T-PE1 should inform and consult data message to be tested PHB value, and the frequency of the PM loss OAM message of T-PE1 transmission.If accepting this frequency, So T-PE2 just returns same value in the mapping message issue T-PE1；If T-PE2 is not Accept this frequency, then just issue at T-PE2 the mapping message of T-PE1 is carried one slower Measurement interval.

In like manner, if PM Delay to be configured, then T-PE1 should inform this PM Delay of T-PE2 The PHB value of OAM message, and the transmission frequency of this OAM message.If accepting this frequency, that T-PE2 just returns same value in the mapping message issue T-PE1；If T-PE2 does not connects By this frequency, then just issue at T-PE2 and the mapping message of T-PE1 is carried a slower survey Amount interval.

The configuration of FMS, is probably between two T-PE and configures alone, and two ends need not harmoniously； But in a transport network, the maintenance of equipment for convenience, it is desirable to the behavior of the two T-PE is consistent , then two ends are likely to negotiate a same parameter.If consulting same parameter, T-PE1 can carry the PHB value and transmission frequency that local terminal requires in corresponding sub-TLV.If accepted This frequency, then T-PE2 just returns same value in the mapping message issue T-PE1；If T-PE2 does not accept this frequency, then just issues at T-PE2 in the mapping message of T-PE1 and carries one Individual slower transmission frequency.

Note, MPLS-TP PW OAM capability TLV and MPLS-TP PW OAM Configuration TLV carries in the mapping message that T-PE1 initiates simultaneously.Only exist The when that MPLS-TP PW OAM capability specifying certain OAM ability, PW OAM Configuration TLV just can configure corresponding parameter.Can be at MPLS-TP PW OAM capability In specify certain OAM ability, and PW OAM configuration TLV is configured without be correlated with Parameter, but MPLS-TP PW OAM capability cannot not indicate certain OAM ability, And configure corresponding parameter in PW OAM configuration TLV.

If it addition, carrying PW OAM configuration in the mapping message that T-PE initiates TLV, then just require the S-PE node configuration MIP attribute in downstream, T-PE node configuration MEP belongs to Property.Certainly, the bit position of these attributes can also newly define a TLV, or is put into PW status TLV In, or be placed in MPLS-TP PW OAM capability, carry in mapping message, Explicit notice downstream each node configuration MEP or MIP attribute.

After OAM attribute configuration between T-PE1 and T-PE2 completes, it is possible to send corresponding OAM message.

As shown in Figure 4, a kind of pseudo-wire OAM attribute configuration method that the present invention provides includes:

Step 400, T-PE1 sends Mapping message and sets up MS-PW, carries OAM capability negotiation The parameter that parameter is relevant with OAM attribute configuration；

Step 410, after S-PE receives this Mapping message, configures MIP attribute, and to T-PE2 Send Mapping message；

Step 420, after T-PE2 receives this Mapping message, configures MEP attribute, according to self OAM ability, retain or to revise described OAM capability negotiation parameter relevant with OAM attribute configuration Parameter, sends Mapping message to S-PE；

Step 430, S-PE forwards described Mapping message to T-PE1；

Step 440, after T-PE1 receives the Mapping message that described S-PE forwards, sets up at PW Proactive OAM message is sent after success.

Embodiment two: LSP Ping configures PW OAM attribute

With reference to Fig. 5, in the present embodiment, MS-PW is dynamically or statically or foundation of being association of activity and inertia, So after MS-PW is successfully established, utilize LSP ping to configure proactive OAM attribute.

In the program, first acquiescence T-PE node has been configured with MEP attribute, and S-PE node is It is configured MIP attribute.So T-PE1 node just can send LSP ping request (request) Message is to T-PE2, and MPLS-TP PW OAM capability in embodiment one can be carried in the inside TLV, for consulting its OAM ability supported, T-PE2 between two nodes of T-PE1 and T-PE2 Its OAM ability supported of A node is fed back in LSP ping response (response) message.

It is of course also possible to give tacit consent to each node all support various OAM ability, it is not necessary to this negotiations process； During capability negotiation can also being placed on the foundation of P W, or webmaster is in end points static configuration, also may be used So that OAM capability negotiation procedure is put together with OAM property parameters described below configuration process.

After having consulted OAM ability, T-PE1 sends LSP ping request message to T-PE2 again, Carry the MPLS-TP PW OAM configuration TLV carried in embodiment one.

T-PE1, according to the PW OAM ability oneself supported, carries MPLS-TP in LSP ping request PW OAM configuration TLV, its form is referred to:

In OAM Function Flags (OAM(Operation Administration Maintenance) flag bit), explanation oneself to be those OAM The parameter that attribute configuration is relevant, defines 4 kinds here, respectively VCCV BFD, PM/Loss, PM/Delay, FMS, more extension should be also within spirit of the present invention.These attribute mark positions Position then explanation to configure corresponding parameter, it is necessary to carries corresponding sub-TLV；Reset and then need not configure phase The parameter closed, i.e. need not carry corresponding sub-TLV.

If VCCV BFD to be configured, then the version of BFD to be consulted, PHB between two T-PE (per hop behavior, hop behavior), Local discriminator (local identifier), transmission The relevant parameters such as frequency and reception frequency.These parameters may all need to consult, it is also possible to simply association Business's part therein, carries in corresponding sub-TLV.Such as, T-PE1 node can bring T-PE2 The local identifier of node oneself local terminal, and after T-PE2 obtains this this locality identifier, can send out at T-PE2 To the LSP ping response message of T-PE1 is carried the local identifier of T-PE1 oneself local terminal, that T-PE1 and T-PE2 can have oneself local terminal and opposite end local identifier, can identify with this Symbol uniquely identifies a BFD session；Certainly, this parameter is optional, i.e. T-PE1 and T-PE2 Can consult to consult local identifier.

The same BFD state down time etc. also having transmission frequency/reception frequency/fault to cause, T-PE1 issue T-PE2 oneself the maximum of receptible transmission frequency/reception frequency, and BFD The shortest time of state down；After T-PE2 checks, if accepting same value, then this value is constant, Feedback in T-PE2 issues the LSP ping response message of T-PE1；If T-PE2 finds Transmission frequency/reception frequency is too fast or/and the time of BFD state down is the shortest, be returned to one slower Frequency or/and the longer BFD state down time to T-PE1；When the success of BFD parameter negotiation, After BFD functional configuration completes, two ends just send and receive BFD message with this new frequency, with more The long BFD state down time works in coordination with the pretection switch at two ends.

If PM Loss to be configured, then T-PE1 should inform and consult data message to be tested PHB value, and the frequency of the PM loss OAM message of T-PE1 transmission.If accepting this frequency, So T-PE2 just returns same value in the LSP ping response message issue T-PE1；If T-PE2 does not accept this frequency, then just issue the LSP ping response message of T-PE1 at T-PE2 In carry a slower measurement interval.

In like manner, if PM Delay to be configured, then T-PE1 should inform this PM Delay of T-PE2 The PHB value of OAM message, and the transmission frequency of this OAM message.If accepting this frequency, that T-PE2 just returns same value in the LSP ping response message issue T-PE1；If T-PE2 does not accept this frequency, then just issue the LSP ping response message of T-PE1 at T-PE2 In carry a slower measurement interval.

The configuration of FMS, is probably between two T-PE and configures alone, and two ends need not harmoniously； But in a transport network, the maintenance of equipment for convenience, it is desirable to the behavior of the two T-PE is consistent , then two ends are likely to negotiate a same parameter.If consulting same parameter, T-PE1 can carry the PHB value and transmission frequency that local terminal requires in corresponding sub-TLV.If accepted This frequency, then T-PE2 just returns same in the LSP ping response message issue T-PE1 Value；If T-PE2 does not accept this frequency, then just issue the LSP ping of T-PE1 at T-PE2 Response message is carried a slower transmission frequency.

As shown in Figure 6, a kind of pseudo-wire OAM attribute configuration method that the present invention provides includes:

Step 600, webmaster enables the MEP/MIP attribute of each node；

Step 610, T-PE1 transmission LSP ping request message, to S-PE, carries OAM attribute and joins Put relevant parameter；

Step 620, S-PE forwards this LSP ping request message to T-PE2；

Step 630, after T-PE2 receives this LSP ping request message, according to the OAM of self Ability, retains or revises the parameter that described OAM configuration is relevant, sending LSP ping response to S-PE Message；

Step 640, S-PE forwards described LSP ping response message to T-PE1；

Step 650, after T-PE1 receives the LSP ping response message that described S-PE forwards, opens Dynamic proactive OAM message sends.

In above-described embodiment one and two, as a example by the pseudo-wire including a S-PE, the present invention will be described, Can extend to include the pseudo-wire of multiple S-PE, and, extend to the OAM configuration of single-hop pseudo-wire.

Wherein, described originating end T-PE, it is used for sending signaling to downstream node, carries in described signaling The parameter that OAM configuration is relevant, described downstream node is exchange provider edge (S-PE) or described Opposite end T-PE；

Wherein, described originating end T-PE, it is additionally operable in described signaling, carry OAM capability negotiation parameter, Inform the OAM ability that T-PE described in downstream node supports；

Wherein, described opposite end T-PE, it is additionally operable to described in receiving carry the ginseng that OAM attribute configuration is relevant During the signaling counted, configure MEP attribute.

Wherein, described system also includes S-PE, described S-PE, described for receiving from upstream node When signaling or LSP ping message, be transmitted to downstream node, downstream node receive described signaling or During LSP ping message, it is transmitted to upstream node.

Wherein, described S-PE be additionally operable to receive described in when carrying the signaling of the relevant parameter of OAM configuration, Configuration MIP attribute.

Wherein, described originating end T-PE, it is used for sending LSP ping message to downstream node, described Carrying the parameter that OAM attribute configuration is relevant in LSP ping message, described downstream node provides for exchange Business edge (S-PE) or described opposite end T-PE；

Wherein, described originating end T-PE, it is additionally operable to carry OAM ability in described LSP ping message Consult parameter, inform the OAM ability that T-PE described in downstream node supports；

Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can To realize with general calculating device, they can concentrate on single calculating device, or distribution On the network that multiple calculating devices are formed, alternatively, they can be with calculating the executable journey of device Sequence code realizes, and performs it is thus possible to be stored in storing in device by calculating device, and And in some cases, can be different from order herein perform shown or described by step, or They are fabricated to respectively each integrated circuit modules, or the multiple modules in them or step are made Single integrated circuit module is become to realize.So, the present invention is not restricted to any specific hardware and software In conjunction with.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for this For the technical staff in field, the present invention can have various modifications and variations.All spirit in the present invention and Within principle, any modification, equivalent substitution and improvement etc. made, should be included in the protection of the present invention Within the scope of.

Claims

1. the collocation method of a pseudo-wire operation management maintainance attribute, it is characterised in that including:

During pseudo-wire in multi-protocol label switching network is dynamically set up, it is provided that business edge (PE) it Between mutual signaling, described signaling is carried pseudo-wire operation management maintainance (OAM) attribute configuration relevant Parameter, the parameter that signaling recipient is correlated with according to described OAM attribute configuration, it is achieved OAM attribute is joined Put；

Described opposite end T-PE receives from described originating end T-PE or exchange provider edge (S-PE) When carrying the signaling of described OAM attribute configuration relevant parameter, if not accepting or have modified one of which Or many kinds of parameters, carry, by signaling, the parameter that OAM attribute configuration is relevant, inform described originating end T-PE The parameter that described opposite end T-PE supports；

Wherein, the relevant parameter of described attribute configuration includes: the ginseng of performance measurement (PM) packet loss rate measurement Parameter and mistake that number, PM packet delay are measured manage the parameter that signal (FMS) is measured.

2. the method for claim 1, it is characterised in that

3. method as claimed in claim 1 or 2, it is characterised in that under described originating end T-PE Trip node receive described in when carrying the signaling of the relevant parameter of OAM attribute configuration, configure MIP attribute Or MEP attribute.

4. the configuration system of a pseudo-wire operation management maintainance, it is characterised in that described system is for many associations In view label exchange network, described system includes originating end T-PE and opposite end T-PE, wherein:

Described originating end T-PE, is used for during pseudo-wire is dynamically set up, and the mutual signaling of opposite end T-PE, The parameter that pseudo-wire operation management maintainance (OAM) attribute configuration is relevant is carried, according to institute in described signaling State the parameter that OAM attribute configuration is relevant, it is achieved OAM attribute configuration；

Described opposite end T-PE, for from described originating end T-PE or exchange provider edge (S-PE) When receiving OAM attribute configuration relevant parameter, if not accepting or changing one or more of which Parameter, carries, by signaling, the parameter that OAM attribute configuration is relevant, informs described in described originating end T-PE The parameter that opposite end T-PE supports；

Wherein, described attribute configuration relevant parameter includes: the parameter of performance measurement (PM) packet loss rate measurement, Parameter and mistake that PM packet delay is measured manage the parameter that signal (FMS) is measured.

5. system as claimed in claim 4, it is characterised in that

6. system as claimed in claim 4, it is characterised in that described opposite end T-PE, is additionally operable to connect When carrying the signaling of the relevant parameter of OAM attribute configuration described in receiving, configure MEP attribute.

7. system as claimed in claim 4, it is characterised in that described system also includes S-PE, institute State S-PE, for when upstream node receives described signaling or LSP ping message, be transmitted to downstream Node, when node receives described signaling or LSP ping message downstream, is transmitted to upstream node.

8. system as claimed in claim 7, it is characterised in that described S-PE is additionally operable to receive institute When stating the signaling carrying the relevant parameter of OAM configuration, configure MIP attribute.