CN101420378B - Optimum restart implementing apparatus and method under resource reservation protocol flow engineering - Google Patents
Optimum restart implementing apparatus and method under resource reservation protocol flow engineering Download PDFInfo
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Abstract
An embodiment of the invention provides a device for realizing graceful restart under of resource reservation protocol and a method thereof. Specifically the circuit card or control card of the label switch router LSR is disposed of a signaling information dispensing unit, a signaling managing unit and a signaling processing unit. The dispensing and processing of RSVP-TE signaling information and controlling the corresponding GR processing procedure are executed on the base of each unit. Thus the distributed disposition of RSVP-TE living example can be effectively realized. At the same time a GE realizing plan under distributed disposition is given to realize the equal and effective distribution of LSP among a plurality of RSVP-TE living examples. Thereby the system can support larger capability standard and increase the system performance.
Description
Technical field
The present invention relates to network communication field, relate in particular to the implement device and the method for Graceful Restart under a kind of resource reservation protocol flow engineering.
Background technology
At present, in network service, resource reservation protocol flow engineering (Resource ReSerVationProtocol-Traffic Engineering, RSVP-TE) (the Graceful Restart of the Graceful Restart under, GR) technology is a kind of method of realization system high reliability, (Label-SwitchRouter when LSR) control plane of node breaks down, can cause the RSVP-TE signaling status to be lost when LSR; When the fault recovery of control plane, this method can be recovered original signaling status under the assistance of neighbor node, does not lose the state of Forwarding plane simultaneously.
In addition, for announcement between neighbor node self possesses the GR ability, also expanded negotiation message Hello message in the prior art, in this message, increased and restarted ability Restart_Cap object, comprised two values in this object: reboot time (Restart Time) and recovery time (Recovery Time).Wherein, the sender that reboot time is represented Hello message is restarted the assembly success after control plane lost efficacy, and and neighbor node between rebulid the needed time of Hello session; The sender who represents Hello message recovery time wishes the recipient of Hello message and the time of its synchronous RSVP-TE signaling status.
For instance, be illustrated in figure 1 as the networking structure schematic diagram of realizing GR in the prior art, among Fig. 1: node R 1, R2, R3 possess the GR ability; When the control plane inefficacy of node R 2, and after its control plane recovery, under the assistance of node R 1 and R3, recover the RSVP-TE signaling status of losing.Below be the process of Message Processing:
1) control plane of intermediate node R2 (being referred to as to restart the Restarter node) lost efficacy;
2) upstream node R1 and downstream node R3 (both is called help Helper node) detect the Hello information drop-out, then close RSVP-TE state timeout treatment, and start and to restart timer, this length of timer is the reboot time (Restart Time) that Restarter node R 2 is announced;
3) upstream node R1 and downstream node R3 continue to send Hello message to Restarter node R 2, but the identify label Dst_Instance of destination node is set to 0;
4) control plane of Restarter node R 2 recovers successfully, and according to the neighbours' data that dispose, sends Hello message toward each neighbor node;
5) Restarter node R 2 receives the Hello message that upstream node R1 and downstream node R3 are sent, and learns that upstream node R1 and downstream node R3 possess the GR ability;
6) upstream node R1 and downstream node R3 receive the Hello message of Restarter node R 2, learn that Restarter node R 2 restarts successfully, and possess the GR ability;
7) Restarter node R 2 starts the recovery timer;
8) upstream node R1 and downstream node R3 stop to restart timer, and start the recovery timer, and this recovery length of timer is RecoveryTime recovery time of Restarter node R 2 announcements;
Here each the bar multi protocol label exchange path that recovers at needs (An MPLSLabel-Switched Path, LSP), all to carry out following step:
A, upstream node R1 transmission is carried the path P ath message of recovery label Recovery Label object to Restarter node R 2;
Downstream node R3 sends restoration path message RecoveryPath message to node R 2;
B, Restarter node R 2 are recovered the RSVP-TE signaling status;
C, Restarter node R 2 send reserves Resv message to upstream node R1;
After d, upstream node R1 receive Resv message, restart RSVP-TE state timeout treatment;
E, Restarter node R 2 transmit path Path message are given downstream node R3;
After f, downstream node R3 receive Path message, restart RSVP-TE state timeout treatment.
Said process has just recovered corresponding RSVP-TE signaling status.
9) Restarter node R 2 is recovered timer expiry again; And send Hello message to upstream node R1 and downstream node R3, and the Recovery Time in the Restart_Cap object is set to 0, the process end of notice upstream node R1 and downstream node R3 Graceful Restart GR.
Thus, above-mentioned GR process finishes, and the RSVP-TE signaling status of Restarter node R 2 is also with regard to full recovery.
According to above technical scheme as can be known, under the little situation of the LSP capacity specifications that needs are supported, a RSVP-TE example just is enough to support, but when needing to support bigger capacity specifications, just may need a plurality of RSVP-TE examples to support, but not effective deployment scheme in the prior art at distributed RSVP-TE example, there is not effectively under the distributed deployment scheme, to realize the method for GR yet, the system that so just makes is difficult to support more jumbo specification, has influenced systematic function.
Summary of the invention
Embodiment of the present invention technical problem to be solved is to provide the implement device and the method for Graceful Restart under a kind of resource reservation protocol flow engineering.Can effectively realize the distributed deployment of RSVP-TE example, and provided the implementation of GR under this deployment, realize equilibrium, the effectively distribution of LSP between a plurality of RSVP-TE examples, thereby made system can support bigger capacity specifications, improved systematic function.
The embodiment of the invention provides the implement device of Graceful Restart under a kind of resource reservation protocol flow engineering, comprising:
The signaling message Dispatching Unit is arranged on the Line cards or control card of LSR LSR, and the RSVP-TE message that is used for receiving is transmitted to Signaling Processing Unit; And will consult the Hello forwards and give the signaling management unit;
Described signaling management unit is arranged on the control card of described LSR, is used for safeguarding the Hello session between described LSR and neighbor node after receiving the Hello message that described signaling message Dispatching Unit reports; And the processing procedure of control Graceful Restart GR;
Described Signaling Processing Unit is arranged on the control card of described LSR, is used for safeguarding the signaling status of described LSR, and handling received RSVP-TE message after receiving the RSVP-TE message that described signaling message Dispatching Unit reports.
The embodiment of the invention also provides a kind of signaling message distribution method based on the described device of aforesaid right requirement, comprising:
Judge received type of message,, then described message reporting is handled to the signaling management unit if received message is a Hello message;
If received message is other RSVP-TE message except that Hello message, then inquire about local multi protocol label exchange path LSP distributing list; If can inquire corresponding Signaling Processing Unit, then described message is forwarded in this corresponding Signaling Processing Unit and handle; Otherwise, ask described signaling management unit to distribute the Signaling Processing Unit of a correspondence to handle received RSVP-TE message.
The embodiment of the invention also provides a kind of method of the management resource that described Signaling Processing Unit uses based on the described device of aforesaid right requirement, comprising:
Read the Epoch value from the signaling management unit, and to the message identifier MESSAGE_ID field of application distribution in described signaling management unit based on interface;
Described signaling management unit distributes new MESSAGE_ID section, and upgrades overall MESSAGE_ID allocation table;
Receive the allocation result of described signaling management unit, and upgrade local MESSAGE_ID allocation table.
The embodiment of the invention also provides a kind of method of the control GR processing procedure based on the described device of aforesaid right requirement, comprising:
If the Hello session loss of neighbor node, then present node assists described neighbor node to recover signaling status as help Helper node under the control of signaling management unit;
If certain Signaling Processing Unit of present node breaks down, then described present node recovers signaling status as restarting the Restater node under the assistance of neighbor node.
By the above-mentioned technical scheme that provides as can be seen, by Line cards or control card deploy signaling message Dispatching Unit at LSR LSR, signaling management unit and Signaling Processing Unit, and on the basis of above-mentioned each unit, carry out the distribution of RSVP-TE signaling message, the processing of signaling message, just can effectively realize the distributed deployment of RSVP-TE example, and provided the implementation of GR under this deployment, realized the equilibrium of LSP between a plurality of RSVP-TE examples, effectively distribute, thereby make system can support bigger capacity specifications, improve systematic function.
Description of drawings
Fig. 1 is a networking structure schematic diagram of realizing GR in the prior art;
Fig. 2 is the structural representation of 1 generator of the embodiment of the invention;
The schematic flow sheet of the embodiment of the invention 2 signaling message distribution method that provides is provided Fig. 3;
The Signalling exchange schematic diagram of the embodiment of the invention 3 signaling message distribution method that provides is provided Fig. 4;
Fig. 5 uses the schematic flow sheet of resource method for the embodiment of the invention 4 provides the described Signaling Processing Unit of management;
Fig. 6 uses the Signalling exchange schematic diagram of resource method for the embodiment of the invention 5 provides the described Signaling Processing Unit of management;
The method flow schematic diagram of the control GR processing procedure that Fig. 7 is provided for the embodiment of the invention 6;
The present node that Fig. 8 is provided for the embodiment of the invention 7 when helping node, the Signalling exchange schematic diagram of control GR processing procedure;
The present node that Fig. 9 is provided for the embodiment of the invention 8 is during as reset node, the Signalling exchange schematic diagram of control GR processing procedure.
Embodiment
Embodiment of the present invention provides the implement device and the method for Graceful Restart under a kind of distributed resource reservation protocol flow engineering.The implement device of embodiment of the present invention and method can effectively realize the distributed deployment of RSVP-TE example, and provided the implementation of GR under this deployment, realize equilibrium, the effectively distribution of LSP between a plurality of RSVP-TE examples, thereby make system can support bigger capacity specifications, improve systematic function.
Embodiment 1: the embodiment of the invention 1 provides the implement device of GR under a kind of distributed RSVP-TE, is illustrated in figure 2 as the structural representation of described device, and described device comprises: signaling message Dispatching Unit, signaling management unit and Signaling Processing Unit.
Wherein, described signaling message Dispatching Unit is arranged on the Line cards or control card of LSR LSR, and the distributed resource reservation protocol flow engineering RSVP-TE message that is used for receiving is transmitted to Signaling Processing Unit; And will consult the Hello forwards and give the signaling management unit.This signaling message Dispatching Unit is one or more, receives from the RSVP-TE message that is sent on one or more interfaces, and the interface here refers to the interface on the Line cards.
Described signaling management unit is arranged on the control card of described LSR, is used for safeguarding the Hello session between described LSR and neighbor node after receiving the Hello message that described signaling message Dispatching Unit issues; And the processing procedure of control Graceful Restart GR.Hello session between described LSR of above-mentioned maintenance and neighbor node specifically comprises: the processing of the Hello extension of message object of the processing of the Hello message object of RFC3209 and RFC4558 definition, the reciprocal process of Hello message and RFC3473 definition.
Described Signaling Processing Unit is arranged on the control card of described LSR, is used for safeguarding the signaling status of described LSR, and handling received RSVP-TE message after receiving the RSVP-TE message that described signaling message Dispatching Unit reports.
In addition, described signaling management unit also can comprise resource management module, and described resource management module is used for management and distributes the employed various resources of described Signaling Processing Unit; Various resources described here comprise: start-up time mark Epoch value and/or message identifier Message-ID etc.
By the technical scheme of above embodiment 1, just can effectively realize the distributed deployment of RSVP-TE example, make system can support bigger capacity specifications, improved systematic function.
Embodiment 2: the embodiment of the invention 2 provides a kind of signaling message distribution method based on embodiment 1 described implement device, is illustrated in figure 3 as the schematic flow sheet of described method, and described method comprises:
Step 31: judge received type of message.
Specifically, at first receive the message packet that each interface reports, judge the type of received message then, judge that just received message is Hello message or other RSVP-TE message, above-mentioned Hello message belongs to a kind of in the RSVP-TE message.
Step 32:, then described message reporting is handled to the signaling management unit if received message is a Hello message.
Step 33:, then further inquire about local label switching path LSP distributing list if received message is other RSVP-TE message except that Hello message.
In this step 33, when received message is other RSVP-TE message, also to further inquire about local LSP distributing list.If can inquire corresponding Signaling Processing Unit, then carry out the operation of step 34; Otherwise, carry out the operation of step 35.
Step 34: this message is forwarded in the Signaling Processing Unit of this RSVP-TE message correspondence and handles.
Step 35: the demand signalling administrative unit distributes a Signaling Processing Unit to handle received RSVP-TE message.
Specifically, inquire about overall LSP distributing list by the signaling management unit exactly,, then described RSVP-TE message is forwarded to described Signaling Processing Unit and handles if inquire corresponding Signaling Processing Unit; Otherwise, redistribute a Signaling Processing Unit and handle received RSVP-TE message, and upgrade described local LSP distributing list.
Above-described overall LSP distributing list comprises the distribution condition of all LSP between Signaling Processing Unit; And described local LSP distributing list comprises the distribution condition of LSP between Signaling Processing Unit that the received RSVP-TE message of described signaling message Dispatching Unit is affiliated.Above-mentioned overall LSP distributing list and local LSP distributing list specifically can comprise: session Session table, LSP table, LSP distributing list and message identifier MESSAGEID table etc.
Wherein, the Session table generally comprises Session table index, Egress LSR ID, TunnelID, Extend LSR ID; And the LSP table generally comprises LSP table index, Session table index, LSP ID, Ingress ID; The LSP distributing list generally comprises the sign ID (Signaling Processing Unit of this ID unique identification) of LSP distributing list index, LSP table index, Signaling Processing Unit; The MESSAGEID table generally comprises MESSAGEID table index, MESSAGE ID, LSP table index etc.
In addition, the above process of inquiring about overall LSP distributing list and the local LSP distributing list of inquiry can be: when received message was MESSAGE_ACK and MESSAGE_ID_NACK message, inquiry MESSAGE ID table obtained the LSP table index; And then inquiry LSP distributing list obtains the sign ID of Signaling Processing Unit; When received message was other RSVP-TE message, inquiry Session table, LSP table and LSP distributing list obtained the sign ID of Signaling Processing Unit.
Same, by the technical scheme of above embodiment 2, just can effectively realize the distributed deployment of RSVP-TE example, realized equilibrium, the effectively distribution of LSP between a plurality of RSVP-TE examples, thereby make system can support bigger capacity specifications, improve systematic function.
Embodiment 3: the embodiment of the invention 3 is to come the signaling message distribution method is described with concrete example, is illustrated in figure 4 as the Signalling exchange schematic diagram of this example, comprises among Fig. 4:
The LCRSVP example, the function of this LCRSVP example is equivalent to the signaling message Dispatching Unit;
The CRSVP example, the function of this CRSVP example is equivalent to the signaling management unit; And
The DRSVP example, the function of this DRSVP example is equivalent to Signaling Processing Unit.
Concrete signalling interactive process is:
A) at first resolve the message of being received by LCRSVP, if this message message is Hello message, then reports CRSVP and handle, handling process finishes.
B) if these message right and wrong Hello message is then inquired about local LSP distributing list by LCRSVP.
C) if inquire corresponding DRSVP, then LCRSVP is forwarded to corresponding DRSVP to message, is handled by the DRSVP of correspondence, and handling process finishes.
D), then distribute a DRSVP example to handle this RSVP message by LCRSVP request CRSVP if do not inquire corresponding DRSVP.
E) CRSVP inquires about overall LSP distributing list, if inquiry is unsuccessful, then redistributes a new DRSVP example and handle this RSVP message, and upgrade overall LSP distributing list, and then notice LCRSVP allocation result.
F) LCRSVP upgrades local LSP distributing list.
G) LCRSVP is forwarded to the DRSVP that this is redistributed to message, is handled accordingly by it, and handling process finishes.
By the technical scheme of above embodiment 3, just can effectively realize the distributed deployment of RSVP-TE example, realized equilibrium, the effectively distribution of LSP between a plurality of RSVP-TE examples, thereby made system can support bigger capacity specifications, improve systematic function.
Embodiment 4: present embodiment 4 provides a kind of method of the management resource that described Signaling Processing Unit uses based on said apparatus embodiment 1, is illustrated in figure 5 as the schematic flow sheet of described method, and described method comprises:
Step 51: read the Epoch value from the signaling management unit, and to the message identifier MESSAGE_ID field of application distribution in described signaling management unit based on linecard interface.
Step 52: the signaling management unit distributes new MESSAGE_ID section, and upgrades overall MESSAGE_ID allocation table.
In this step 52, described overall MESSAGE_ID allocation table is included as the MESSAGE_ID section that all linecard interfaces distribute.
Step 53: receive the allocation result of described signaling management unit, and upgrade local MESSAGE_ID allocation table.
In this step 53, described local MESSAGE_ID allocation table comprises the MESSAGE_ID section of the interface that all LSP of this Signaling Processing Unit processing are related.
Above-described overall MESSAGE_ID allocation table and described local MESSAGE_ID allocation table specifically comprise: MESSAGE_ID allocation table index, interface index, MESSAGE_ID initial value and MESSAGE_ID end value.
By the technical scheme of above embodiment 4, just can effectively realize the distributed deployment of RSVP-TE example, realized equilibrium, the effectively distribution of LSP between a plurality of RSVP-TE examples, thereby made system can support bigger capacity specifications, improve systematic function.
Embodiment 5: present embodiment 5 is the explanation of being used the resource method to carry out of the described Signaling Processing Unit of provided management is illustrated in figure 6 as the Signalling exchange schematic diagram of described method with concrete example, comprises among Fig. 6:
The CRSVP example, the function of this CRSVP example is equivalent to the signaling management unit;
The DRSVP example, the function of this DRSVP example is equivalent to Signaling Processing Unit.
Concrete signalling interactive process is:
A) DRSVP reads the Epoch value from CRSVP
B) DRSVP is to the MESSAGE_ID section of CRSVP application distribution based on linecard interface
C) CRSVP distributes new MESSAGE_ID section, and upgrades overall MESSAGE_ID allocation table
D) CRSVP notice DRSVP allocation result
E) DRSVP upgrades local MESSAGE_ID allocation table.
By the technical scheme of above embodiment 5, just can effectively realize the distributed deployment of RSVP-TE example, realized equilibrium, the effectively distribution of LSP between a plurality of RSVP-TE examples, thereby made system can support bigger capacity specifications, improve systematic function.
Embodiment 6: present embodiment 6 provides a kind of method of the control GR processing procedure based on said apparatus embodiment 1, is illustrated in figure 7 as the schematic flow sheet of described method, and described method comprises:
Step 71: if the Hello session loss of neighbor node, then present node assists described neighbor node to recover signaling status as help Helper node under the control of signaling management unit.
Specifically, when the Hello of neighbor node session loss, all Signaling Processing Units relevant with described neighbor node are notified in the signaling management unit, and this neighbor node signaling status is lost.
Described Signaling Processing Unit enters waits for that neighbours return to form, and all LSP enter the self-refresh state.
After described signaling management unit and described neighbor node reconstruction Hello session success, notice all Signaling Processing Units relevant in described signaling management unit with described neighbor node, this neighbor node recovers.
Described Signaling Processing Unit assists described neighbor node to recover signaling status as helping the Helper node.
Step 72: if certain Signaling Processing Unit of present node breaks down, then described present node recovers signaling status as restarting the Restater node under the assistance of neighbor node.
Specifically, when the signaling management unit detects certain Signaling Processing Unit and breaks down, stop and all neighbor nodes that this Signaling Processing Unit is related between the Hello session.
Delete the overall LSP distributing list list item relevant, and notify all signaling message Dispatching Unit deletions the local LSP distributing list list item relevant with this Signaling Processing Unit that breaks down with the Signaling Processing Unit that breaks down.
When the signaling management unit detects this Signaling Processing Unit that breaks down and recovers, start and all neighbor nodes that this Signaling Processing Unit is related between the Hello session.
The Signaling Processing Unit that recovers is as restarting the Restarter node, after receiving the RSVP-TE message that described signaling message Dispatching Unit sent, recovers the RSVP-TE signaling status.
The signaling status of above-described LSP comprises: path state block PSB, reservation state block RSB and flow control status block TCSB.
Technical scheme by above embodiment 6, just can effectively realize the distributed deployment of RSVP-TE example, and provided the implementation of GR under this deployment, realized equilibrium, the effectively distribution of LSP between a plurality of RSVP-TE examples, thereby make system can support bigger capacity specifications, improve systematic function.
Embodiment 7: present embodiment 7 is to come present node when helping node with concrete example, the explanation of control GR processing procedure, the Signalling exchange schematic diagram of the embodiment of the invention 7 method that provides is provided, comprise CRSVP example, DRSVP example 1 and DRSVP example 2 among Fig. 8, the function of this CRSVP example is equivalent to the signaling management unit, and the function of this DRSVP example is equivalent to Signaling Processing Unit.Concrete signalling interactive process is:
A) when the Hello of neighbor node session loss, CRSVP notify all therewith neighbours' this neighbor node of DRSVP example of being correlated with lose, wherein DRSVP example 1 is exactly the DRSVP example that neighbours are relevant therewith with DRSVP example 2.
B) relevant DRSVP example enters and waits for that neighbours return to form, and all LSP enter the self-refresh state.
C) CRSVP starts and to restart timer and wait for that neighbor node restarts.
D) CRSVP and neighbor node are rebuild after the Hello session success, and CRSVP stops to restart timer, start to recover timer.
E) CRSVP this neighbor node of all DRSVP examples of notifying neighbours therewith to be correlated with recovers.
F) the DRSVP example begins to assist neighbor node to recover signaling status as the Helper node.
G) recover timer expiry, all DRSVP examples that CRSVP notifies neighbours therewith to be correlated with recover to finish.
H) the aging LSP that does not have recovery of DRSVP example.
Technical scheme by above embodiment 7, just can effectively realize the distributed deployment of RSVP-TE example, and provided the implementation of GR under this deployment, realized equilibrium, the effectively distribution of LSP between a plurality of RSVP-TE examples, thereby make system can support bigger capacity specifications, improve systematic function.
Embodiment 8: present embodiment 8 is when coming present node as reset node with concrete example, the explanation of control GR processing procedure, the Signalling exchange schematic diagram of the embodiment of the invention 8 method that provides is provided, comprise among Fig. 9: the CRSVP example, the function of this CRSVP example is equivalent to the signaling management unit; Normal DRSVP example, this normal DRSVP example is the example that does not break down; The DRSVP example that recovers, the DRSVP example of this recovery are to break down to need the example of recovery, and its function is equivalent to Signaling Processing Unit; The LCRSVP example, the function of this LCRSVP example is equivalent to the signaling message Dispatching Unit.Concrete signalling interactive process is:
A) CRSVP detects certain DRSVP example fault.
B) the Hello session between all neighbor nodes that CRSVP stops and this DRSVP example relates to.
C) CRSVP notice other state normal DRSVP example relevant with the described neighbor node of b enters the self-refresh state.
D) the CRSVP deletion overall LSP distributing list list item relevant with fault DRSVP example.
E) CRSVP notifies all LCRSVP example deletions the local LSP distributing list list item relevant with fault DRSVP example.
F) CRSVP detects the recovery of fault DRSVP example.
G) the Hello session between all neighbor nodes that CRSVP starts and fault DRSVP example relates to.
H) CRSVP starts the recovery timer.
I) LCRSVP transmits and receives the RSVP message.
J) the DRSVP example of Hui Fuing after receiving the RSVP message, recovers signaling status according to agreement predetermined process process as Restarter.
K) normal DRSVP example receives after the RSVP message, withdraws from the self-refresh state.
L) recover after the timer expiry, CRSVP notifies normal DRSVP example to recover to finish.
M) the aging LSP that does not have recovery of normal DRSVP example.
Technical scheme by above embodiment 8, just can effectively realize the distributed deployment of RSVP-TE example, and provided the implementation of GR under this deployment, realized equilibrium, the effectively distribution of LSP between a plurality of RSVP-TE examples, thereby make system can support bigger capacity specifications, improve systematic function.
It should be noted that among above-mentioned each embodiment that each included unit is just divided according to function logic, but is not limited to above-mentioned division, as long as can realize function corresponding; In addition, the concrete title of each functional unit also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
In addition, one of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, corresponding program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
In sum, the embodiment of the invention is by Line cards or control card deploy signaling message Dispatching Unit at LSR LSR, signaling management unit and Signaling Processing Unit, and on the basis of above-mentioned each unit, carry out the distribution of RSVP-TE signaling message, handle and control corresponding GR processing procedure, just can effectively realize the distributed deployment of RSVP-TE example, and provided under distributed deployment the method that realizes GR, realized the equilibrium of LSP between a plurality of RSVP-TE examples, effectively distribute, thereby make system can support bigger capacity specifications, improve systematic function.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (15)
1. the implement device of Graceful Restart under the resource reservation protocol flow engineering is characterized in that, comprising:
The signaling message Dispatching Unit is arranged on the Line cards or control card of LSR LSR, and the resource reservation protocol flow engineering RSVP-TE message that is used for receiving is transmitted to Signaling Processing Unit; And will consult the Hello forwards and give the signaling management unit;
Described signaling management unit is arranged on the control card of described LSR, is used for safeguarding the Hello session between described LSR and neighbor node after receiving the Hello message that described signaling message Dispatching Unit reports; And the processing procedure of control Graceful Restart GR;
Described Signaling Processing Unit is arranged on the control card of described LSR, is used for safeguarding the signaling status of described LSR, and handling received RSVP-TE message after receiving the RSVP-TE message that described signaling message Dispatching Unit reports.
2. device as claimed in claim 1 is characterized in that, described signaling management unit comprises:
Resource management module is used for management and distributes the employed various resources of described Signaling Processing Unit; Described various resource comprises: start-up time mark Epoch value and/or message identifier MESSAGE_ID.
3. device as claimed in claim 1 or 2 is characterized in that, described signaling message Dispatching Unit is one or more; Each signaling message Dispatching Unit receives from the RSVP-TE message on one or more interfaces.
4. the signaling message distribution method based on the described device of claim 1 is characterized in that, comprising:
Judge received type of message,, then described message reporting is handled to the signaling management unit if received message is a Hello message;
If received message is other RSVP-TE message except that Hello message, then inquire about local multi protocol label exchange path LSP distributing list; If can inquire corresponding Signaling Processing Unit, then described message is forwarded in this corresponding Signaling Processing Unit and handle; Otherwise, ask described signaling management unit to distribute the Signaling Processing Unit of a correspondence to handle received RSVP-TE message.
5. method as claimed in claim 4 is characterized in that, the described signaling management of described request unit distributes the Signaling Processing Unit of a correspondence to handle received RSVP-TE message, specifically comprises:
Inquire about overall LSP distributing list by described signaling management unit,, then described RSVP-TE message is forwarded to described Signaling Processing Unit and handles if inquire corresponding Signaling Processing Unit; Otherwise, redistribute a Signaling Processing Unit and handle received RSVP-TE message, and upgrade described local LSP distributing list.
6. method as claimed in claim 5 is characterized in that, describedly redistributes a Signaling Processing Unit, specifically comprises:
Make the LSP balanced number in all Signaling Processing Units, and the LSP that will belong to same session is assigned to same Signaling Processing Unit.
7. method as claimed in claim 5 is characterized in that, described overall LSP distributing list and described local LSP distributing list specifically comprise: session Session table, LSP table, LSP distributing list and message identifier MESSAGE_ID table.
8. the method for the management resource that described Signaling Processing Unit uses of the described device of claim 1 is characterized in that, comprising:
Read the Epoch value from the signaling management unit, and to the message identifier MESSAGE_ID field of application distribution in described signaling management unit based on interface;
Described signaling management unit distributes new MESSAGE_ID section, and upgrades overall MESSAGE_ID allocation table;
Receive the allocation result of described signaling management unit, and upgrade local MESSAGE_ID allocation table.
9. method as claimed in claim 8 is characterized in that, described overall MESSAGE_ID allocation table comprises: be the MESSAGE_ID section of total interface distribution.
10. method as claimed in claim 8 is characterized in that, described local MESSAGE_ID allocation table comprises: the MESSAGE_ID section of the interface that all LSP of this signaling management Single Component Management are related.
11., it is characterized in that described overall MESSAGE_ID allocation table and described local MESSAGE_ID allocation table specifically comprise as one of them described method of claim 8-10:
MESSAGE_ID allocation table index, interface index, MESSAGE_ID initial value and MESSAGE_ID end value.
12. the method for the control GR processing procedure of the described device of claim 1 is characterized in that,
If the Hello session loss of neighbor node, then present node assists described neighbor node to recover signaling status as help Helper node under the control of signaling management unit;
If certain Signaling Processing Unit of present node breaks down, then described present node recovers signaling status as restarting the Restater node under the assistance of neighbor node.
13. method as claimed in claim 12 is characterized in that, described present node as helping the Helper node to assist described neighbor node to recover signaling status, specifically comprises under the control of signaling management unit:
All Signaling Processing Units relevant with described neighbor node are notified in the signaling management unit, and this neighbor node is lost;
Described Signaling Processing Unit enters waits for that neighbours return to form, and all LSP enter the self-refresh state;
After described signaling management unit and described neighbor node reconstruction Hello session success, notice all Signaling Processing Units relevant in described signaling management unit with described neighbor node, this neighbor node recovers;
Described Signaling Processing Unit assists described neighbor node to recover signaling status as helping the Helper node.
14. method as claimed in claim 12 is characterized in that, described present node recovers signaling status as restarting the Restater node under the assistance of neighbor node, specifically comprise:
When the signaling management unit detects certain Signaling Processing Unit and breaks down, stop and all neighbor nodes that this Signaling Processing Unit is related between the Hello session;
Delete the overall LSP distributing list list item relevant, and notify all signaling message Dispatching Unit deletions the local LSP distributing list list item relevant with this Signaling Processing Unit that breaks down with the Signaling Processing Unit that breaks down;
When the signaling management unit detects this Signaling Processing Unit that breaks down and recovers, start and all neighbor nodes that this Signaling Processing Unit is related between the Hello session;
The Signaling Processing Unit that recovers is as restarting the Restarter node, after receiving the RSVP-TE message that described signaling message Dispatching Unit sent, recovers the RSVP-TE signaling status.
15. method as claimed in claim 14 is characterized in that, the signaling status of described LSP comprises: path state block PSB, reservation state block RSB and flow control status block TCSB.
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| CN104980295A (en) * | 2014-04-09 | 2015-10-14 | 中兴通讯股份有限公司 | Method, device and system for preventing network node from aging |
| CN105530117A (en) * | 2014-10-24 | 2016-04-27 | 中兴通讯股份有限公司 | Method, device and system for updating protocol state of control channel |
| CN106161172A (en) * | 2015-04-02 | 2016-11-23 | 中兴通讯股份有限公司 | The computational methods of a kind of tunnel path and device |
| CN107222402B (en) * | 2016-03-22 | 2021-05-18 | 中兴通讯股份有限公司 | Method and device for adjusting restart recovery time |
| US10680941B2 (en) * | 2018-06-13 | 2020-06-09 | Juniper Networks, Inc. | Graceful restart procedures for label switched paths with label stacks |
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| US6594235B1 (en) * | 1999-04-28 | 2003-07-15 | 3Com Corporation | Method of triggering reroutes in an asynchronous transfer mode network |
| CN1842034A (en) * | 2005-03-30 | 2006-10-04 | 华为技术有限公司 | Multi protocol label exchange performance supervision ability notifying and arranging method |
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