CN101022449B - Method, system and nodal equipment for establishing bypass LSP - Google Patents
Method, system and nodal equipment for establishing bypass LSP Download PDFInfo
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- CN101022449B CN101022449B CN2007100056736A CN200710005673A CN101022449B CN 101022449 B CN101022449 B CN 101022449B CN 2007100056736 A CN2007100056736 A CN 2007100056736A CN 200710005673 A CN200710005673 A CN 200710005673A CN 101022449 B CN101022449 B CN 101022449B
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Abstract
A method for setting up bypass LSP includes generating main LSP path message carried with down-stream node and required by information of bypass LSP path limitation at time of setting up bypass LSP on head node, sending said path message to down-stream node, setting up bypass LSP by down-stream node according to received path message for realizing path management -control on bypass LSP by head node.
Description
Technical field
The present invention relates to network field, relate in particular to a kind of method and system and node device of setting up bypass LSP.
Background technology
MPLS TE FRR (the quick heavy-route of multi-protocol label switching traffic engineering, FRR, be the abbreviation of FastReroute, mean " fast heavy-route ") in bypass LSP (bypass LSP) foundation with realize as shown in Figure 1 the schematic diagram of setting up bypass LSP that Fig. 1 provides for prior art.
As shown in Figure 1, wherein, all routers (identifying with Rn) all adopt IGP (InterGateway Protocol, Interior Gateway Protocol), IGP expansion and RSVP (ResourceReservation Protocol, Interior Gateway Protocol); According to the reservation situation of the network bandwidth resources that is provided with on each router interface, it is carried out following network settings:
1. on R1, set up main LSP, the explicit path of main LSP is set to R1-R2-R5-R6, R1 is as the head node router of this main LSP, ingress (inlet of main LSP) for this main LSP, R2, R5 are transit (transmission) router of this main LSP, and R6 is the egress (outlet of main LSP) of this main LSP;
2. the link that is provided with between R2 and the R5 is protected link, and the interface of this protected link on R2 is the outgoing interface of protected link, and the path of setting up bypass LSP is set on R2, and to set up the path that bypass LSP need pass through be R2-R4-R5;
3. on R2, set up this bypass LSP according to the path R2-R4-R5 that sets up this bypass LSP needs process.
After finishing above-mentioned network settings; when R2 detects protected link (link between the R2-R5) when breaking down; the signaling of this main LSP and data all can be switched to this above bypass LSP; and can send the path err (link failure) that this LSP of expression changes by IGP expansion or upstream nodes; head node is received after the information of path err or behind the fault notification of IGP, can be attempted to set up new main LSP.
Before new main LSP sets up successfully, need can to obtain transmitting by the mode of binding bypass LSP through data and/or the signaling of this main LSP, after new main LSP set up successfully, then described data and/or signaling can realize normal the forwarding by new main LSP.
In the existing technology, the foundation of bypass LSP is fully by PLR (Point of Local Repair, Point of Local Repair) fixed configurations of router determines, but the integral dispensing of Internet resources is finished on the head node router, this has caused the real-time distribution of Internet resources and control signaling to disconnect, and then make the real-time distribution of Internet resources on the head node router, not finish, and then make Internet resources rationally not used.
And, when many through the main LSP of protected link, and when having a plurality of main LSP to break down, all need all can be switched to above the fixing bypassLSP through the data and the signaling of each main LSP transmission, give no thought to the ability to bear of bypass LSP, even have this moment other idle links to exist, also do not have data and signaling and be switched to these above idle link; For example; it still is example with Fig. 1; if more than one of the main LSP of the protected link of process (link between the R2-R5); and the bypass LSP path that these main LSP generate on R2 is R2-R4-R5; then when these main LSP broke down, all data and signalings by these main LSP transmission all needed to transmit through this bypass LSP, promptly all transmit by link R2-R4-R5; even if R2-R3-R5 free time this moment, these data and signaling also can not transmitted by this link of R2-R3-R5.
As seen, there is the defective of real-time distribution with the disconnection of control signaling of Internet resources in prior art when setting up bypass LSP.
Summary of the invention
The embodiment of the invention provides a kind of method and system and node device of setting up bypass LSP, has solved the real-time distribution and the problem of controlling the signaling disconnection of Internet resources in the prior art.
The embodiment of the invention is to be achieved through the following technical solutions:
A kind of method of setting up bypass LSP comprises:
Head node generates the PATH of main label switching path LSP, sends described PATH to downstream node; The information that limit in the bypass LSP path that carrying downstream node in the described PATH needs when setting up bypass LSP;
Downstream node receives described PATH, sets up bypass LSP according to the information of the bypass LSP path restriction of carrying in the described PATH.
A kind of system that sets up bypass LSP comprises that PATH makes up module and bypass LSP is set up module,
PATH makes up module, is used for generation pass message, the information that limit in the bypass LSP path that carrying downstream node in the described PATH needs when setting up bypass LSP; To its downstream node transmit path message;
Bypass LSP is set up module, is used for the PATH of RX path message construction module to its transmission, sets up bypass LSP according to the information of the bypass LSP path restriction of carrying in the described PATH.
A kind of node device comprises that PATH makes up module, is used for generation pass message, and the information of the bypass LSP path restriction that needs when carrying downstream node in the described PATH and setting up bypass LSP is to its downstream node transmit path message.
A kind of node device comprises that bypass LSP sets up module, is used to receive the PATH to its transmission, and the information of the bypass LSP path restriction that needs when bypass LSP is set up in carrying in the described PATH is set up bypass LSP according to described PATH.
The technical scheme that is provided by the invention described above embodiment as can be seen, the embodiment of the invention provides a kind of method and system and node device of setting up bypass LSP, realized finishing the operation that management and control are implemented in the path that downstream node is set up bypass LSP at head node, the real-time distribution of Internet resources is combined with the control signaling, and then make Internet resources rationally be utilized, improved the flexibility of setting up bypass LSP.
Description of drawings
The schematic diagram of setting up bypass LSP that Fig. 1 provides for prior art;
The flow chart of setting up bypass LSP that Fig. 2 provides for the embodiment of the invention;
The head node router that Fig. 3 provides for the embodiment of the invention is controlled the schematic diagram of bypass LSP;
The structural representation of the system that Fig. 4 provides for the embodiment of the invention.
Embodiment
For the ease of understanding the technical scheme that the embodiment of the invention provides, the operating process of the technical scheme that the embodiment of the invention is provided below in conjunction with Fig. 2 describes:
Step 1, prepare to set up main LSP (label switched path at head node, Label Switch Path) time, obtains the information of the bypass LSP path restriction that needs when the protected and downstream node of the important link needs of main LSP is set up bypass LSP (bypass LSP) according to network design;
That is to say; when head node is prepared to set up the main LSP of MPLS TE (multi-protocol label switching traffic engineering); need to recognize in advance that by network design the important link of which main LSP process need be protected earlier, and can learn which path the bypass LSP of downstream node router can set up by by network design.
Step 2, according to obtain described information by network design, the information that limit in the bypass LSP path that increasing its downstream node in the main LSP of head node is provided with needs when setting up bypass LSP, the content representation that the information of described bypass LSP path restriction comprises be which path downstream node can set up bypass LSP by, i.e. the information of bypass LSP path restriction comprises is the information (IP addresses of nodes as described) of the node of the suggestion downstream node path process of setting up bypass LSP;
Here need to prove, after getting access to these information by network design, head node is when being provided with main LSP, need to increase the setting of the path restricted information that will pass through when downstream node is set up bypass LSP, the content of this setting, promptly the information of the bypass LSP path restriction of downstream node needs when setting up bypass LSP is called suggested route object;
Alternatively, the form of the Format Object of Suggested route object shown in can employing table one defines:
Table one: 0123
Wherein object-class is set to suggested route object, and value is 32768, and the definition of the ipv4 subobject among the definition of ipv4subobject and the explicit route object is identical, and all is strict explicit path; Length represents the length of whole suggested route object.
Step 3, head node when generating path (path) message of main LSP, the information of carrying described suggested route object; Then, described path message is sent to downstream node;
Here the information of why in described path message, carrying suggested route object, its purpose is that the process of downstream node being set up bypass LSP combines with the control signaling that the head node router sends, and described path message is one of head node control signaling to downstream node; By this operation, can realize that the path of downstream node being set up bypass LSP manage control at head node, the real-time distribution and the control signaling of Internet resources combined; Make the foundation of bypass LSP to adjust, thereby also improved the flexibility of setting up bypass LSP according to the real-time operating position of Internet resources.
Step 4, described downstream node receive described path message, set up a bypaSS LSP at least according to the information of the path restriction of carrying in the described path message, to protect the important link of main LSP;
Here it should be noted that: as for setting up several bypass LSP or setting up the information that a bypassLSP (being the quantity of the described downstream node bypass LSP that can set up) depends on the path restriction of carrying in the pass message, several the paths of setting up bypass LSP that the information of described path restriction comprises, downstream node just can be set up several bypass LSP at least; It should be noted that simultaneously, bypass LSP is set up in the path of the bypass LSP that downstream node can be strictly occurs in the information according to the restriction of described path, also can set up bypass LSP according to the path in the path of the bypass LSP that occurs in the information that comprises the restriction of described path.
So far, the operating process of setting up bypass LSP that the embodiment of the invention is provided is illustrated.
Next, when the downstream node that receives described path message was PLR (Point of Local Repair), several situations that PLR should be noted that when setting up bypass LSP described:
1. if position of the link-protection (link protection) in the path message that PLR receives or node-protection (Node Protection) position are set, this PLR just can determine that this main LSP needs protected so;
2. if PLR detects the information that carries suggested route object in the path message of main LSP, and the address of the local physical interface of first ipv4 subobject (subobject of ipv4) in the suggested route object object and PLR is when identical, PLR can select the suggested route object through protected LI(link interface) LSP when setting up bypass LSP;
3. the main LSP that has identical suggested route object can be protected on the identical bypassLSP; If detecting the main LSP of different suggested route object exists, PLR will set up a new bypass LSP the main LSP that carries this difference suggested route object object is implemented protection, because the name of bypass LSP is identical, the different bypass LSP that sets up this moment can index with name and distinguish;
4. under the situation of the information inconsistency of the suggested route object that in the path message that the path (path) of the bypass LSP that PLR oneself is provided with receives with it, carries, the path of the bypass LSP that is provided with according to PLR oneself and the priority of described suggested route object determine that this PLR sets up the path of bypass LSP; The priority of path that promptly can be by the bypass LSP that PLR oneself is provided with is set and the priority of described suggested route object, the path that decides preferential selection PLR oneself to be provided with, the information that limit in the bypass LSP path of carrying among the still preferential suggested of the selection route object is set up bypass LSP, and PLR is according to should the preferential result who selects setting up bypass LSP;
5. if the information of not carrying suggested route object in the path message that PLR receives, then this PLR sets up bypassLSP according to the path that himself is provided with when setting up bypass LSP, and determines the mapping relations of main LSP and this bypass LSP;
6. if carried the information of suggested route object in the path message that PLR receives, and this PLR does not need to set up bypass LSP, this PLR is left intact to the information of described suggested route object so;
Also be applicable to the situation of setting up main LSP by explicit path 7.PLR set up bypass LSP according to suggested route object, if when the suggested route object that is provided with at head node was identical with explicitroute object (explicit route object), head node should send warning information to system; Described explicit route object is used to set up main LSP;
8., think that then this suggested route object is invalid if the downstream node as PLR detects the outgoing interface of suggested route object through main LSP;
9. if do not support suggested route object as the downstream node of PLR, this downstream node is left intact to this suggested route object so.
It can be seen from the above, by increase the setting of suggested route object at head node, can realize path control and management when head node is set up bypass LSP to its downstream node, realizes the reasonable utilization to Internet resources;
Because the foundation of original bypass LSP only is to finish by being provided with of downstream node, and the technical scheme that the present embodiment of the invention provides makes the foundation of bypass LSP to adjust according to the real-time operating position of Internet resources, so in the reasonable utilization that realizes Internet resources, also improved the flexibility of setting up bypass LSP.
For the ease of reader's understanding,, the technical scheme that the embodiment of the invention provides is illustrated with the example of router as three-layer switching equipment below in conjunction with Fig. 3:
As shown in Figure 3, set up two main LSP between R1-R2-R5-R6, be designated as LSP1 and LSP2 respectively, R1 is as its head node router, the suggested routeobject that LSP1 is set on R1 is R2-R4-R5, and the suggested route object of LSP2 is R2-R3-R5;
When R1 sets up main LSP, can be encapsulated in the information of suggested route object in the path message, router sends to downstream node; This path message is followed RSVP (Resource ReservationProtocol, RSVP);
Downstream node router R2 is as PLR, receive described path message and it is detected, if when finding to carry suggested route object in the described path message, need to check that the ipv4 subobject (being the IP address of each message outgoing interface) among this suggestedroute object is whether identical with the address of the physical interface of R2, when confirming that the address of physical interface of this ipv4 subobject and R2 is identical, R2 can select to set up bypass LSP through the suggested route object of protected LI(link interface) LSP;
Main LSP with identical suggested route object object is protected on the identical bypassLSP;
When the main LSP with different suggested route object objects exists, need set up new bypass LSP protects the main LSP that carries different suggested route object objects, such as on R2, finding to have two different path message, correspond respectively to two different main LSP (being LSP1 and LSP2), the suggested route object object difference that they carry, it is the routing information difference of setting up bypass LSP that they carry, article one, R2-R4-R5 need be passed through in the path of setting up bypass LSP of carrying in the path message, R2-R3-R5 need be passed through in the path of setting up bypass LSP of carrying in the other path message, then needs to set up respectively through the bypass LSP of R2-R4-R5 and the bypass LSP of process R2-R3-R5 according to these two path message;
For the ease of distinguishing these two different bypass LSP, can claim that the bypass LSP through R2-R4-R5 is bypass-lsp1, claim that the LSP through R2-R3-R5 is bypass-lsp2, promptly it is distinguished by the mode that name indexes;
When the network link of R2-R5 breaks down; the data of LSP1 and signaling concern the bypass-lsp1 that is switched according to binding and protection; the data of LSP2 and signaling are switched to bypass-lsp2 according to binding and protection relation, and the data of issuing R6 from R1 have just realized the resource-sharing in different paths with signaling like this.
The embodiment of the invention also provides a kind of system that sets up bypass LSP, comprises that PATH makes up module, bypass LSP is set up module and alarm module, and wherein bypass LSP is set up module and comprised that prior information selects module, as shown in Figure 4;
PATH makes up module and is arranged at head node, is used in head node generation pass message, the information that limit in the bypass LSP path that carrying downstream node in this PATH needs when setting up bypass LSP; The information of this bypass LSP path restriction is to obtain by important link that needs protection according to network design acquisition LSP and the information of setting up bypass LSP path; This PATH makes up module and also is used for sending this PATH to its downstream node;
Bypass LSP is set up module and is arranged at downstream node, is mainly used in the PATH of RX path message construction module to its transmission, sets up bypass LSP according to the information of the bypass LSP path restriction of carrying in the described PATH;
The preferential selection under the situation that information module is used for the information inconsistency that bypass LSP path that bypass LSP path and PATH in the downstream node setting carry limits, priority according to the path restricted information that carries in the bypass LSP path of downstream node setting and the PATH, select the path restricted information that carries in the bypass LSP path of downstream node setting or the PATH, and the result notification bypass LSP of its selection is set up module;
Alarm module, be used under the information of the described bypass LSP path restriction situation identical with the known information of setting up main LSP path, be advisory route object suggested route object when identical, send warning information to system with explicit route object explicit route object.
The technical scheme of the technical scheme of the described system of the embodiment of the invention and the described method of the embodiment of the invention is similar, does not repeat them here.
A kind of node device that the embodiment of the invention provides, comprise that PATH makes up module and alarm module, the road is used to generate the PATH of the information of the bypass LSP path restriction that carries downstream node needs when setting up bypass LSP through the message construction module, and sends this PATH to its downstream node; It is identical with the known information of setting up main LSP path that alarm module is used for working as the information that limits in the bypass LSP path, when promptly the two clashes, sends warning information.The technical scheme of the described node device of the embodiment of the invention is similar to the technical scheme of the described method of the embodiment of the invention, does not repeat them here.
The embodiment of the invention also provides a kind of node device, comprises that bypass LSP sets up module, and bypass LSP is set up module and comprised preferential selection information module;
Bypass LSP is set up the PATH of information that module is used to receive the bypass LSP path restriction of needs when bypass LSP is set up in the carrying of its transmission, and sets up bypass LSP according to described PATH;
The preferential information module of selecting is used for path restricted information that bypass LSP path and PATH in the downstream node setting carry when inconsistent, priority according to the information of the bypass LSP path restriction of carrying in the bypass LSP path of downstream node setting and the PATH, select the information of the bypass LSP path restriction of carrying in the bypass LSP path of downstream node setting or the PATH, and the result notification bypass LSP of its selection is set up module;
The technical scheme of this node device is similar to the technical scheme of the described method of the embodiment of the invention, does not repeat them here.
The embodiment of the invention provides a kind of method and system and node device of setting up bypass LSP, by its downstream node being set up the path control and management of bypass LSP at head node, the real-time distribution of Internet resources is combined with the control signaling, realize reasonable utilization Internet resources; Thereby increased the flexibility of setting up bypass LSP;
This is because the foundation of original bypass LSP only is to finish by being provided with of downstream node, and the technical scheme that the present embodiment of the invention provides makes the foundation of bypass LSP to adjust according to the real-time operating position of Internet resources, so in the reasonable utilization that realizes Internet resources, also improved the flexibility of setting up bypass LSP.
So far, the present invention only is that example has illustrated the technical scheme that the embodiment of the invention provides with the preferred embodiment, but the present invention is not only limited to this, and all send described PATH to downstream node based on the PATH of head node generation main label switching path LSP; The information that limit in the bypass LSP path that carrying downstream node in the described PATH needs when setting up bypass LSP; Downstream node receives described PATH, sets up the technical scheme of bypass LSP according to the information of the bypass LSP path of carrying in described PATH restriction, no matter which kind of form of employing, all within protection scope of the present invention.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (7)
1. a method of setting up bypass LSP is characterized in that, comprising:
Head node generates the PATH of main label switching path LSP, sends described PATH to downstream node; The information that limit in the bypass LSP path that carrying downstream node in the described PATH needs when setting up bypass LSP;
Downstream node receives described PATH, information according to the bypass LSP path restriction of carrying in the described PATH is set up bypass LSP, when the information inconsistency of the bypass LSP path restriction of carrying in the bypass LSP path of downstream node setting and the described PATH, then according to the priority of the information of the bypass LSP path restriction of carrying in the bypass LSP path of described downstream node setting and the described PATH, preferentially select the information of the bypass LSP path restriction of carrying in the bypass LSP path of downstream node setting or the PATH to set up bypass LSP.
2. method according to claim 1, it is characterized in that, when the information of described bypass LSP path restriction comprises the IP address of ethernet data frame outgoing interface, the step that downstream node is set up bypass LSP specifically comprises before: judge when described IP address is identical with the IP address of the physical interface of described downstream node this locality that described downstream node selects the information of described bypass LSP path restriction to set up bypass LSP.
3. method according to claim 1, it is characterized in that described downstream node receives between the step of described PATH and the described step of setting up bypass LSP according to the path restricted information that carries in the described PATH and also comprises: described downstream node need determine whether to set up bypass LSP;
When described downstream node determines that according to the information in the path that needs protection of described downstream node setting needs are not set up bypass LSP, then ignore the path restricted information in the described PATH, described path restricted information is not processed.
4. method according to claim 1 is characterized in that, the step that described head node makes up the PATH of main label switching path LSP also comprises before:
Information as if the bypass LSP path restriction of need when downstream node is set up bypass LSP determining is identical with the known information of setting up main LSP path, then sends warning information.
5. a system that sets up bypass LSP is characterized in that, comprises that PATH makes up module and bypass LSP is set up module, wherein,
PATH makes up module and is arranged at head node, is used to generate the PATH of main label switching path LSP, the information that limit in the bypass LSP path that carrying downstream node in the described PATH needs when setting up bypass LSP; To its downstream node transmit path message;
Bypass LSP is set up module and is arranged at downstream node, is used for the PATH of RX path message construction module to its transmission, sets up bypass LSP according to the information of the bypass LSP path restriction of carrying in the described PATH;
Described bypass LSP is set up module and is comprised preferential selection information module, when being used for the information inconsistency of the bypass LSP path restriction that bypass LSP path and PATH in the downstream node setting carry, priority according to the information of the bypass LSP path restriction of carrying in the bypass LSP path of downstream node setting and the PATH, select the information of the bypass LSP path restriction of carrying in the bypass LSP path of downstream node setting or the PATH, and the result notification bypass LSP of its selection is set up module.
6. system according to claim 5 is characterized in that, also comprises being arranged at head node by alarm module, is used for setting up main LSP routing information when identical when the information of described bypass LSP path restriction with known, sends warning information.
7. downstream node equipment, it is characterized in that, comprise that bypass LSP sets up module, be used to receive the PATH that head node sends, the information of the bypass LSP path restriction that needs when bypass LSP is set up in carrying in the described PATH is set up bypass LSP according to described PATH;
Described bypass LSP is set up module and is comprised preferential selection information module, when being used for the information inconsistency of the bypass LSP path restriction that bypass LSP path and PATH in the setting of described downstream node equipment carry, priority according to the information of the bypass LSP path restriction of carrying in the bypass LSP path of described downstream node equipment setting and the PATH, select the information of the bypass LSP path restriction of carrying in the bypass LSP path of described downstream node equipment setting or the PATH, and the result notification bypass LSP of its selection is set up module.
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| US7782762B2 (en) * | 2007-09-21 | 2010-08-24 | Alcatel Lucent | RSVP-TE enhancement for MPLS-FRR bandwidth optimization |
| CN103166848B (en) * | 2013-03-07 | 2016-12-28 | 杭州华三通信技术有限公司 | Select method and the node of multi-protocol label switching traffic engineering bypass tunnel |
| CN108011992B (en) * | 2017-12-06 | 2020-08-25 | 常熟理工学院 | Low-delay Internet of things implementation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1505409A (en) * | 2002-11-27 | 2004-06-16 | 华为技术有限公司 | Rerouting method based on network entrance node |
| CN1588890A (en) * | 2004-10-08 | 2005-03-02 | 烽火通信科技股份有限公司 | Method for controlling plane participation protective rotation in ASON network |
| US20050152269A1 (en) * | 2004-01-13 | 2005-07-14 | Ren-Hao Liu | Method for MPLS link protection |
| WO2005122472A1 (en) * | 2004-06-14 | 2005-12-22 | Huawei Technologies Co., Ltd. | A method for realizing the reliability guarantee of end-to-end quality of service |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1505409A (en) * | 2002-11-27 | 2004-06-16 | 华为技术有限公司 | Rerouting method based on network entrance node |
| US20050152269A1 (en) * | 2004-01-13 | 2005-07-14 | Ren-Hao Liu | Method for MPLS link protection |
| WO2005122472A1 (en) * | 2004-06-14 | 2005-12-22 | Huawei Technologies Co., Ltd. | A method for realizing the reliability guarantee of end-to-end quality of service |
| CN1588890A (en) * | 2004-10-08 | 2005-03-02 | 烽火通信科技股份有限公司 | Method for controlling plane participation protective rotation in ASON network |
Non-Patent Citations (1)
| Title |
|---|
| P. Pan, et. al.Fast Reroute Extensions to RSVP-TE for LSP Tunnels.IETF RFC4090.2005,1-38. * |
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