CN102136936B - Method, node and system for preventing control plane faults from influencing operation of forward data plane - Google Patents
Method, node and system for preventing control plane faults from influencing operation of forward data plane Download PDFInfo
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Abstract
The invention discloses a method, node and system for preventing control plane faults from influencing operation of a forward data plane and nodes. The method comprises the following steps: after the control plane fails, when the node needs to delete the cross connection of label switch path (LSP) of a local forward data plane, sending the information of the cross connection to a head node of the LSP; receiving a response message returned by the head node; and if the response message indicates that the cross connection of the LSP is not consistent with the cross connection of the LSP stored by the head node, deleting the cross connection of the local LSP; otherwise, reserving the cross connection of the local LSP. According to the invention, normal services can be prevented from being interrupted wrongly when the information of the control planes among network nodes is not consistent or the information of the control panel is not consistent with the information of the forward data plane in a node.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of method, node and system of avoiding the operation of control plane fault effects Forwarding plane.
Background technology
Along with the continuous progress of hardware technology, the device interior parts of data communication field have differentiated special control module and packet forwarding module.Wherein, control module is responsible for the operation of various routes, signaling, management agreement, realizes for autgmentability generally adopts software; Packet forwarding module is responsible for the forwarding of packet message, for guaranteed efficiency is generally that hardware is realized.And, between control module and packet forwarding module, can accomplish independent replacing completely.In this case, the fault of General Requirements control module can not affect the normal operation of forwarding module.
At present, by RSVP (RSVP, Resource ReSer Vation Protocol) and Extended Protocol be applied to behind transmission field, on network model, differentiate clearly especially independently control plane (Control Plane) and Forwarding plane (Forward Data Plane), even allowed to dispose respectively.In this case, controlling, forward separation has been a necessary satisfied requirement, and operator explicitly calls for the fault of control plane can not affect the normal operation of Forwarding plane.
In network, obtaining of the topological sum service distribution information of each node to whole network is all that route, signaling protocol by its control plane realized alternately, and the mutual inevitable free of agreement postpones, this time delay has caused the inconsistent of control plane data on each node.Even more serious situation is that the control plane consultation on some node breaks down, such as Control card resets.In the prior art, the control plane of malfunctioning node can recover the control plane data of self from the control plane obtaining information of neighbor node after recovering to communicate by letter with neighbor node, not only can cause the control plane of intra-node and the data of Forwarding plane inconsistent.And, in the situation that cannot guaranteeing that control plane data are correct, forward and intersect by control plane Data Update, will cause cross-coupled wrong deletion of Forwarding plane, the service disconnection that should not interrupt.
Summary of the invention
The embodiment of the present invention provides a kind of method, node and system of avoiding the operation of control plane fault effects Forwarding plane, to avoid between network node control plane information inconsistent, or when intra-node control plane and Forwarding plane information are inconsistent, interrupt mistakenly normal business.
For this reason, the embodiment of the present invention provides following technical scheme:
A method of avoiding the operation of control plane fault effects Forwarding plane, comprising:
After control plane breaks down, when this node need to be deleted the interconnection of LSP of local Forwarding plane, described cross-coupled information is sent to the first node of described LSP;
Receive the response message that first node returns;
If described response message indicates the interconnection of the interconnection of described LSP and the described LSP of first node preservation inconsistent, the interconnection of deleting local LSP;
Otherwise, retain the interconnection of local LSP.
A kind of node, comprising:
Information transmitting unit, after breaking down at control plane, when this node need to be deleted the interconnection of LSP of local Forwarding plane, sends to described cross-coupled information the first node of described LSP;
Response message receiving element, the response message returning for receiving first node;
Intersection information maintenance unit, when indicate the interconnection of the described LSP that the interconnection of described LSP and first node preserve inconsistent at described response message, the interconnection of deleting local LSP; Otherwise, retain the interconnection of local LSP.
A kind of first node, comprising:
Information receiving unit, the cross-coupled information sending for receiving other node;
Judging unit, for determining LSP corresponding to described interconnection, and whether the interconnection that judgement receives is consistent with the interconnection of the described LSP oneself preserving;
Response unit, for returning to response message to described other node, and in described response message, indicate described interconnection whether consistent with the interconnection of the described LSP oneself preserving, to make described other nodes indicate the interconnection of described LSP and the interconnection of the described LSP of described first node preservation when inconsistent at described response message, the interconnection of deleting local LSP; Indicate the interconnection of described LSP and the interconnection of the described LSP that described first node is preserved when consistent at described response message, retain the interconnection of local LSP.
A system of avoiding the operation of control plane fault effects Forwarding plane, comprising: the first node being connected by LSP and other node;
Described other node, for after control plane breaks down, when this node need to be deleted the interconnection of LSP of local Forwarding plane, described cross-coupled information is sent to the first node of described LSP, and the response message returning at described first node is while indicating the interconnection of the described LSP that the interconnection of described LSP and first node preserve inconsistent, the interconnection of deleting local LSP;
First node, the cross-coupled information sending for receiving described other node, determine the LSP that described interconnection is corresponding, and judge that whether described interconnection is consistent with the interconnection of the described LSP oneself preserving, and return to response message to described other node, in described response message, indicate described interconnection whether consistent with the interconnection of the described LSP oneself preserving.
The embodiment of the present invention is avoided method, node and the system of control plane fault effects Forwarding plane operation, after control plane breaks down, when this node need to be deleted the interconnection of LSP of local Forwarding plane, it not direct deletion, but first described cross-coupled information is sent to the first node of described LSP, the interconnection that the result of described interconnection being confirmed according to first node determines whether to delete described LSP again.The interconnection of the LSP preserving due to this locality with first node is as validation criteria, data than upstream and downstream adjacent node are more reliable, therefore not only can avoid between network node control plane information inconsistent, and can avoid intra-node control plane and Forwarding plane information when inconsistent, interrupt mistakenly normal business.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the present invention, for those of ordinary skill in the art, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart that the embodiment of the present invention is avoided the method for control plane fault effects Forwarding plane operation;
Fig. 2 is the structural representation of a kind of node of providing of the embodiment of the present invention;
Fig. 3 is the structural representation of the another kind of node that provides of the embodiment of the present invention;
Fig. 4 is the networking schematic diagram that the embodiment of the present invention is avoided the system of control plane fault effects Forwarding plane operation;
Fig. 5 is the schematic diagram of LSP in the embodiment of the present invention.
Embodiment
In order to make those skilled in the art person understand better the scheme of the embodiment of the present invention, below in conjunction with drawings and embodiments, the embodiment of the present invention is described in further detail.
In existing RSVP and Extended Protocol thereof, two adjacent nodes under normal circumstances, can continue to send Hello message, lay oneself open to normal operating conditions to notice the other side.When the control plane of certain node breaks down, such as Control card resets, now, its adjacent node all can detect Hello message disappearance, thus the communication disruption of judgement and this malfunctioning node.
In this case, conventionally adopt the level and smooth (GR of startup, Graceful Restart) mechanism, malfunctioning node is by the control plane GR process between adjacent node, obtain control plane information from adjacent node, recover this node control panel data, then upgrade label switched path (LSP, the label switched paths) intersection information of malfunctioning node this locality according to this node control panel data.
GR is a kind of be intended to make main Routing Protocol and multiprotocol label switching (MPLS, Multi-Protocol Label Switching) the signaling protocol minimized mechanism of impact of restarting, its objective is that reduce router restarts or calculate the route flapping that needs the service of heavy-route to cause as far as possible, reduces the waste of route computational resource and network bandwidth resources.
In these cases, adjacent node can enter GR state, waits for that malfunctioning node recovers the communication of control plane within a period of time (being referred to as the GR time).In the prior art, follow-uply have two kinds of situations:
(1) after the GR time finishes, adjacent node does not also complete and the communicating by letter of the control plane of malfunctioning node, and adjacent node can be deleted the LSP interconnection that oneself retains.
(2), before the GR time finishes, the control plane of adjacent node and malfunctioning node has recovered to communicate by letter.Now, malfunctioning node and adjacent node interactive information, the LSP interconnection that recovers its control plane.Generally, the data on adjacent node can ensure that malfunctioning node returns to the state before its fault.But also have some special circumstances, the data on adjacent node change, the LSP interconnection the control plane LSP interconnection that malfunctioning node recovers from adjacent node and local transmitting is inconsistent; More specifically situation is the fault that control plane also appears in adjacent node, cannot provide at all data to malfunctioning node in order to recover the LSP interconnection of control plane.At this moment, malfunctioning node can adopt dogmatic mode, directly with its also LSP interconnection of insecure control plane Data Update Forwarding plane.
Due in above-mentioned (1) kind situation, adjacent node delete own reservation LSP interconnection based on prerequisite be that the control plane communication of assumed fault node does not recover, its forwarding must be fault, no matter or its whether forward fault, all can keep.But this hypothesis is problematic, because the Forwarding plane of malfunctioning node may be normal, business is at all in normal use, and just fault has appearred in control plane.Therefore, in this case, adjacent node can be deleted the LSP interconnection that oneself retains.
And in above-mentioned (2) kind situation, malfunctioning node recovers after communication, because its control plane data that obtain are not reliable, therefore, in this case, malfunctioning node during with the LSP interconnection of insecure control plane Data Update Forwarding plane, may be deleted some LSP interconnection mistakenly.
The embodiment of the present invention is avoided method, node and the system of control plane fault effects Forwarding plane operation, for above-mentioned these situations, occur abnormal at control plane, need to delete LSP interconnection time, the cross-coupled information of LSP that needs are deleted sends to first node to carry out consistency confirmation, to avoid the wrong LSP of deletion interconnection.
It should be noted that, in embodiments of the present invention, described node refers to one in network network element that possesses MPLS exchange capacity, and this node comprises control plane information and Forwarding plane information.Wherein:
Control plane information comprises: path status controll block (PSB, Path Status Control Block) and reservation state controll block (RSB, ReSerVation Status Control Block).On node, each LSP can safeguard a PSB and a RSB, is recording the network layer information of a LSP, mainly comprises:
The source of A, LSP, destination node mark, the call number of LSP on source node, instance number, these information can be in network LSP of unique identification.
The preempting priority of B, LSP, bandwidth, route restriction, path record, the parameters such as upstream and downstream label value, these parameters play key effect to the forwarding behavior of message.
Forwarding plane information comprises interconnection, and each LSP can have a corresponding interconnection.Interconnection is the foundation of message repeating, and its content comprises: incoming interface, enters label, outgoing interface, outgoing label, priority, the parameters such as bandwidth.
As can be seen here, control plane information is the information of a network level, has described the network level characteristic of LSP, and the information of Forwarding plane is the information of a node level, has described the forwarding behavior of LSP on this node.
As shown in Figure 1, be the flow chart that the embodiment of the present invention is avoided the method for control plane fault effects Forwarding plane operation, comprise the following steps:
Step 101, after control plane breaks down, when this node need to be deleted the interconnection of LSP of local Forwarding plane, sends to described cross-coupled information the first node of described LSP.
Described cross-coupled information spinner will comprise the information of network level, such as: first node, end-node, LSP index, LSP example etc.For a given LSP, these information are identical on all nodes of its process.
Step 102, receives the response message that first node returns.
First node receives after described cross-coupled information, determines the LSP that this interconnection is corresponding, then judges that whether described interconnection is consistent with the interconnection of the described LSP of first node preservation, and judged result is returned to described node by response message.Such as, can in described response message, carry and be used to indicate the described interconnection indication information whether consistent with the interconnection of the described LSP of first node preservation.
It should be noted that, first node is receiving after described cross-coupled information, if the state of first node self is not normal condition, in the restarting process of first node after resetting, can abandon the information of receiving, after own recovering state is normal, respond again after again receiving the cross-coupled information that described node retransmit.
Step 103, judges whether described response message indicates the interconnection of the described LSP that described interconnection and first node preserve whether inconsistent; If so, perform step 104; Otherwise, execution step 105.
Step 104, the interconnection of deleting local LSP.
Step 105, retains the interconnection of local LSP.
It should be noted that, it can be that this node control plane breaks down that described control plane breaks down, also can be other node such as adjacent node control plane breaks down, thereby cause that this node need to delete the cross-coupled situation of the LSP of local Forwarding plane.
Said process can be applicable to any node except first node in network, and, the definite cross-coupled scene that need to delete local LSP can be above-mentioned two kinds of situations, certainly, also can be the cross-coupled situation that need to delete local LSP in other scenes, this embodiment of the present invention is not limited.That is to say, what specifically when need to delete the interconnection of local LSP and specifically delete which LSP cross-coupledly determines etc., can carry out according to the processing mode in existing protocol.
In addition, described node, according to the response message of first node, deleted after the interconnection of local LSP, also will send to downstream node the cross-coupled signaling message of deleting corresponding LSP, and detailed process is same as the prior art, does not repeat them here.
In above-mentioned steps 101, when described cross-coupled information is sent to first node, can send by setting specific messages.
Such as, can send cross validation request message to the first node of described LSP, in described cross validation request message, carry described cross-coupled information.
According to the difference of applied environment, the interconnection of the local LSP that this node need to be deleted may have one or more, the interconnection of local LSP of deleting at needs have multiple, send the pressure of cross-coupled information to network proper communication in order to alleviate, described node can be carried at multiple cross-coupled information in a cross validation request message and send, and prerequisite is that the first node of LSP corresponding to these interconnections is same.
In addition, for the reliability that ensures that message sends, in the time that cross validation request message sends, can adopt re-transmission affirmation mechanism, if this node is not received the response message that first node returns in the given time, resend described cross validation request message.Number of retransmissions can be determined as required, such as 2 times.Similar in the realization of described re-transmission affirmation mechanism and prior art, be not described in detail at this.
Described cross validation request message can have various structures form, such as, can adopt structure shown in following table 1.
Table 1:
Wherein, the implication of each field is as follows:
Msg_Length, message-length, unit is byte;
Msg_Type＝60；
Version＝01；
Msg_ID, message identifier, is used for using in the time retransmitting and confirm;
Lsp_XC_Object:LSP intersection information.
Correspondingly, in above-mentioned steps 102, the response message that first node returns also can have various structures form.Such as, corresponding with cross validation request message shown in above-mentioned table 1, described response message can adopt structure shown in following table 2.
Table 2:
Wherein, the implication of each field is as follows:
Msg_Length, message-length, unit is byte.
Msg_Type＝61；
Version＝01；
Msg_ID: message identifier, is used for using in the time retransmitting and confirm;
Lsp_XC_Type:0 represents consistent intersection, and 1 represents inconsistent intersection.
Len: the length that consistent intersection and inconsistent intersection respectively take in message.
Lsp_XC_Object: intersection information.
It should be noted that, said structure is a kind of concrete example, and the embodiment of the present invention does not limit the concrete structure of described cross validation request message.Certainly, also can adopt other specific messages.
The embodiment of the present invention is avoided the method for control plane fault effects Forwarding plane operation, after control plane breaks down, when this node need to be deleted the interconnection of LSP of local Forwarding plane, it not direct deletion, but first described cross-coupled information is sent to the first node of described LSP, the interconnection that the result of described interconnection being confirmed according to first node determines whether to delete described LSP again.No matter because be that user's side is called out and initiated the interconnection of LSP of setting up, or the interconnection of the LSP that issues of network management configuration, always retaining the cross-coupled data of the most reliable LSP on first node.Therefore, by the data of first node, as validation criteria, beguine is more reliable according to the data validation of upstream and downstream adjacent node.
In network, if being only control plane, certain node occurs extremely, and Forwarding plane is when normal, use the embodiment of the present invention to avoid the method for control plane fault effects Forwarding plane operation, can ensure that the fault of control plane does not affect the normal use of Forwarding plane, has promoted the reliability of Forwarding plane.Not only can avoid between network node control plane information inconsistent, and the interconnection that occurs control plane and Forwarding plane LSP on node is when inconsistent, can detect quickly and accurately and remove the interconnection of inconsistent LSP, resource on guarantee network can be used, and can avoid mistake to delete the interconnection of LSP, and then avoid interruption regular traffic.
Comprise in its Extended Protocol GMPLS, MPLS-TP network at MPLS network, utilize the method for the embodiment of the present invention, can network enabled in multinode control plane reset operation simultaneously, promoted upgrading, the maintenance efficiency of network.
Such as: a network being made up of 2000 nodes is wanted updating software release, if utilize traditional GR mechanism, requires adjacent node not reset simultaneously, and this reset that just requires node must be that serial is carried out.And utilize the method for the embodiment of the present invention, and because adjacent node control plane resets simultaneously, can not affect the operation of Forwarding plane, therefore after each node software has loaded, all nodes that can reset concurrently, improve the upgrading efficiency of network.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method is can carry out the hardware that instruction is relevant by program to complete, described program can be stored in a computer read/write memory medium, described storage medium, as: ROM/RAM, magnetic disc, CD etc.
Correspondingly, the embodiment of the present invention also provides a kind of node, as shown in Figure 2, is a kind of structural representation of this node.
In this embodiment, described node 200 comprises:
Information transmitting unit 201, after breaking down at control plane, when this node need to be deleted the interconnection of LSP of local Forwarding plane, sends to described cross-coupled information the first node of described LSP;
Response message receiving element 202, the response message returning for receiving first node;
Intersection information maintenance unit 203, when indicate the interconnection of the described LSP that the interconnection of described LSP and first node preserve inconsistent at described response message, the interconnection of deleting local LSP; Otherwise, retain the interconnection of local LSP.
In concrete application, described information transmitting unit 201, can send cross validation request message to first node, and described cross-coupled information is carried in described confirmation request message.And, if needed, can in described cross validation request message, carry multiple cross-coupled information of deleting of needing simultaneously, the first node of LSP corresponding to described multiple interconnections is identical.And, described confirmation request message can adopt and retransmit affirmation mechanism transmission, such as described information transmitting unit 201 is not in the time that described response message receiving element 202 is received the response message that first node returns in the given time, resend described cross validation request message.
Certainly, described information transmitting unit 201 also can send to first node by described cross-coupled information by other specific messages.Specifically can avoid the description in the method for control plane fault effects Forwarding plane operation with reference to the embodiment of the present invention above, no longer describe in detail at this.
The node of the embodiment of the present invention, after control plane breaks down, when this node need to be deleted the interconnection of LSP of local Forwarding plane, it not direct deletion, but first described cross-coupled information is sent to the first node of described LSP, the interconnection that the result of described interconnection being confirmed according to first node determines whether to delete described LSP again, thereby both avoided the control plane of intra-node and the data of Forwarding plane inconsistent, avoid again the interconnection of wrong deletion LSP, interrupted regular traffic.
Correspondingly, the embodiment of the present invention also provides another kind of node, as shown in Figure 3, is a kind of structural representation of this node.
In this embodiment, described node 300 comprises:
Information receiving unit 301, the cross-coupled information sending for receiving other node;
Judging unit 302, for determining LSP corresponding to described interconnection, and whether the interconnection that judgement receives is consistent with the interconnection of the described LSP oneself preserving;
Whether response unit 303, for returning to response message to described other node, and indicate described interconnection consistent with the interconnection of the described LSP oneself preserving in described response message.
Described response message can be as required, adopts different version, specifically can be with reference to description above.
Correspondingly, the embodiment of the present invention also provides a kind of system of avoiding the operation of control plane fault effects Forwarding plane, as shown in Figure 4, is a kind of structural representation of this system.
In Fig. 4, described system comprises: first node 400 and other node 401 of being connected by LSP.
It should be noted that, described other node can have multiple, can be intermediate node or end-node, that is to say, on a LSP, comprises a first node and an end-node, and one or more intermediate node.
For the sake of clarity, in Fig. 4, only show other node.Wherein:
Described other node 401, for after control plane breaks down, when this node need to be deleted the interconnection of LSP of local Forwarding plane, described cross-coupled information is sent to the first node 400 of described LSP, and the response message returning at described first node 400 is while indicating the interconnection of the described LSP that described interconnection and first node preserve inconsistent, the interconnection of deleting local LSP;
First node 400, the cross-coupled information sending for receiving described other node 401, determine the LSP that described interconnection is corresponding, and judge that whether described interconnection is consistent with the interconnection of the described LSP oneself preserving, and return to response message to described other node 401, in described response message, indicate described interconnection whether consistent with the described LSP interconnection of oneself preserving.
Utilize the embodiment of the present invention to avoid the system of control plane fault effects Forwarding plane operation, break down and recover after communication in node control plane, not only can avoid between network node control plane information inconsistent, and can avoid in the control plane of intra-node and the data of Forwarding plane when inconsistent, mistake is deleted the interconnection of LSP, interrupt regular traffic, promoted the reliability of Forwarding plane.
Further describe for example the embodiment of the present invention below and avoid the processing procedure difference with the prior art of each node in the time need to deleting the interconnection of Forwarding plane in the system of control plane fault effects Forwarding plane operation.
As shown in Figure 5, supposing has four nodes in MPLS network, is respectively: A, B, C, D, wherein set up a LSP, and path is { A->B->D}.This LSP has set up respectively the associated component of control plane and Forwarding plane on node A, B, C.PSB on node A can periodically send refresh message to the PSB in Node B, and the PSB in Node B can periodically send refresh message to the PSB on node D, and reverse RSB also can send refresh message.Meanwhile, between node A, B, C adjacent node, can periodically send Hello message, to confirm connected relation each other.
Suppose that control plane fault is to be resetted and caused by the control board of Node B, and the hypothesis GR time is T1.
In the prior art, the processing procedure of node A, B, D is as follows:
Node A: the hello packet that can not continue to receive Node B detected, and can not receive the refresh message from the RSB of Node B.Therefore node A thinks that Node B has entered reseting procedure.Node A starts a waiting timer, and the time is T1.Subsequent action has two possibilities:
(1) when the T1 time finishes, Node B is not recovered and the communicating by letter of node A, and at this moment node A can delete interconnection, PSB, the RSB that oneself is safeguarded.
(2) when the T1 time finishes, Node B has been recovered and the communicating by letter of node A, and node A has received the Hello message of Node B again.At this moment the PSB information that, node A can safeguard oneself sends to Node B.
Node D: and the action of node A is similar.Different, in above-mentioned (2) kind situation, what node sent is RSB information.
Node B: in reset restarting process, have two kinds of possibilities:
(1) within the T1 time, Node B does not complete to start to be recovered, and after exceeding the T1 time, Node B just sets up and the Hello message of node A, node D.At this moment Node B can wait node A, node D send respectively PSB, RSB information to oneself, but because PSB, RSB on node A, node D discharge, so Node B can not received message, (is assumed to be T2) after certain hour, Node B can discharge the interconnection that oneself is safeguarded.Now, in Node B, this LSP is not corresponding PSB, RSB, interconnection.
(2) within the T1 time, Node B has completed the connection setup with node A, node D, restarts to receive and dispatch Hello message with node A, node D.At this moment, Node B can be received from node A, node D the message of PSB, RSB, Node B can be rebuild by these information PSB, the RSB of the control plane of oneself, and the interconnection of safeguarding with the Forwarding plane of oneself compares, if consistent, does not revise, if inconsistent, can revise, or the interconnection of Delete superfluous, or add the interconnection lacking.
The method and system of utilizing the embodiment of the present invention to provide, the processing procedure of node A, B, D is as follows:
Node A: the hello packet that can not continue to receive Node B detected, and can not receive the refresh message from the RSB of Node B.Therefore node A thinks that Node B has entered reseting procedure.Node A starts a waiting timer, and the time is T1.Subsequent action has two possibilities:
(1) when the T1 time finishes, Node B is not recovered and the communicating by letter of node A, at this moment node A is owing to being the first node of this LSP, therefore do not need to send cross validation message to first node, only need oneself to judge whether this LSP needs to delete, if need to delete, node A can delete interconnection, PSB, the RSB that oneself is safeguarded.
(2) when the T1 time finishes, Node B completes and the communicating by letter of node A, and node A has received the Hello message of Node B again.At this moment the PSB information that, node A can safeguard oneself sends to Node B.
Node D: send cross validation request message to first node, in this request message, carry the cross-coupled information of this LSP, if the response message of first node indicates the interconnection of the described LSP that this interconnection and first node preserve inconsistent, node D can delete own maintenance to interconnection, PSB, RSB that should LSP.Otherwise, can retain these information, always etc. Node B is recovered.
Node B: start after recovery, rebuild and communicate by letter with node A, node D, restart to receive and dispatch Hello message with node A, node D, Node B can be received from node A, node D the message of PSB, RSB, Node B compares the interconnection of these information and the Forwarding plane of oneself maintenance, has two kinds of possibilities:
(1) if consistent, do not revise.
(2) if inconsistent, send cross validation request message to first node A, and according to the instruction in the response message of first node A, determine whether to delete oneself safeguard to interconnection, PSB, RSB that should LSP.。
Above the embodiment of the present invention is described in detail, has applied embodiment herein the present invention is set forth, the explanation of above embodiment is just for helping to understand method and apparatus of the present invention; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (11)
1. a method of avoiding the operation of control plane fault effects Forwarding plane, is characterized in that, comprising:
After control plane breaks down, when this node need to be deleted the interconnection of LSP of local Forwarding plane, described cross-coupled information is sent to the first node of described LSP;
Receive the response message that first node returns;
If described response message indicates the interconnection of the interconnection of described LSP and the described LSP of first node preservation inconsistent, the interconnection of deleting local LSP;
Otherwise, retain the interconnection of local LSP.
2. method according to claim 1, is characterized in that, describedly sends to the first node of described LSP to comprise described cross-coupled information:
By cross validation request message, described cross-coupled information is sent to the first node of described LSP.
3. method according to claim 2, is characterized in that, described method also comprises:
Multiple if the interconnection that needs to delete has, and the first node of LSP corresponding to described multiple interconnection is identical, in described cross validation request message, carries described multiple cross-coupled information.
4. according to the method in claim 2 or 3, it is characterized in that, described method also comprises:
If this node is not received the response message that first node returns in the given time, resend described cross validation request message.
5. method according to claim 1, is characterized in that, described method also comprises:
First node receives after described cross-coupled information, determines the LSP that described interconnection is corresponding;
Judge that whether described interconnection is consistent with the interconnection of the local described LSP preserving of first node;
Whether first node returns to response message to described node, and in described response message, indicate the interconnection of described LSP consistent with the interconnection of the described LSP of first node preservation.
6. a node, is characterized in that, comprising:
Information transmitting unit, after breaking down at control plane, when this node need to be deleted the interconnection of LSP of local Forwarding plane, sends to described cross-coupled information the first node of described LSP;
Response message receiving element, the response message returning for receiving first node;
Intersection information maintenance unit, when indicate the interconnection of the described LSP that the interconnection of described LSP and first node preserve inconsistent at described response message, the interconnection of deleting local LSP; Otherwise, retain the interconnection of local LSP.
7. node according to claim 6, is characterized in that,
Described information transmitting unit, specifically for sending to described cross-coupled information by cross validation request message the first node of described LSP.
8. node according to claim 7, is characterized in that,
In described cross validation request message, carry multiple cross-coupled information, the first node of LSP corresponding to described multiple interconnections is identical.
9. according to the node described in claim 7 or 8, it is characterized in that,
Described information transmitting unit, also when do not receive in the given time the response message that first node returns at described response message receiving element, resends described cross validation request message.
10. a first node, is characterized in that, comprising:
Information receiving unit, the cross-coupled information sending for receiving other node;
Judging unit, for determining LSP corresponding to described interconnection, and whether the interconnection that judgement receives is consistent with the interconnection of the described LSP oneself preserving;
Response unit, for returning to response message to described other node, and in described response message, indicate described interconnection whether consistent with the interconnection of the described LSP oneself preserving, to make described other node indicate the interconnection of described LSP and the interconnection of the described LSP of described first node preservation when inconsistent at described response message, the interconnection of deleting local LSP; Indicate the interconnection of described LSP and the interconnection of the described LSP that described first node is preserved when consistent at described response message, retain the interconnection of local LSP.
Avoid the system of control plane fault effects Forwarding plane operation for 11. 1 kinds, it is characterized in that, comprising: the first node being connected by LSP and other node;
Described other node, comprising:
Information transmitting unit, after breaking down at control plane, when this node need to be deleted the interconnection of LSP of local Forwarding plane, sends to described cross-coupled information the first node of described LSP;
Response message receiving element, the response message returning for receiving first node;
Intersection information maintenance unit, when indicate the interconnection of the described LSP that the interconnection of described LSP and first node preserve inconsistent at described response message, the interconnection of deleting local LSP; Otherwise, retain the interconnection of local LSP;
Described first node, comprising:
Information receiving unit, the cross-coupled information sending for receiving other node;
Judging unit, for determining LSP corresponding to described interconnection, and whether the interconnection that judgement receives is consistent with the interconnection of the described LSP oneself preserving;
Response unit, for returning to response message to described other node, and in described response message, indicate described interconnection whether consistent with the interconnection of the described LSP oneself preserving, to make described other node indicate the interconnection of described LSP and the interconnection of the described LSP of described first node preservation when inconsistent at described response message, the interconnection of deleting local LSP; Indicate the interconnection of described LSP and the interconnection of the described LSP that described first node is preserved when consistent at described response message, retain the interconnection of local LSP.
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| CN103036724B (en) * | 2012-12-14 | 2016-01-20 | 北京华为数字技术有限公司 | State information transmission method, the network equipment and unit equipment |
| CN105763412A (en) * | 2014-12-16 | 2016-07-13 | 中兴通讯股份有限公司 | Communication method in virtual switching cluster and apparatus thereof |
| WO2017063166A1 (en) * | 2015-10-15 | 2017-04-20 | 华为技术有限公司 | Method and device for establishing label-switched path circumventing disconnected link |
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| CN101047641A (en) * | 2006-06-27 | 2007-10-03 | 华为技术有限公司 | Stationary restart method of CR-LSR |
| CN101310475A (en) * | 2006-09-08 | 2008-11-19 | 华为技术有限公司 | Recovery method and apparatus for abnormal delete of optical network LSP |
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| CN101310475A (en) * | 2006-09-08 | 2008-11-19 | 华为技术有限公司 | Recovery method and apparatus for abnormal delete of optical network LSP |
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