CN102469008B - A kind of method and system of automatic triggering layer creating secondary label switching path - Google Patents
A kind of method and system of automatic triggering layer creating secondary label switching path Download PDFInfo
- Publication number
- CN102469008B CN102469008B CN201010538148.2A CN201010538148A CN102469008B CN 102469008 B CN102469008 B CN 102469008B CN 201010538148 A CN201010538148 A CN 201010538148A CN 102469008 B CN102469008 B CN 102469008B
- Authority
- CN
- China
- Prior art keywords
- path
- lsp
- lsr
- interface
- lower floor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of method of automatic triggering layer creating secondary label switching path, under multi-layer multi-domain scene, path-calculating element carries complete path and path on the way through the switching layer information of interface in label switched path (LSP) path computation result returned to LSR (LSR); LSR carries described complete path and switching layer information setting up in the RSVP of LSP (RSVP) signaling, and the LSR of RSVP signaling process determines starting point and the terminal on lower floor LSP border, thus realizes automatically triggering lower floor LSP and create; The present invention also discloses a kind of system of automatic triggering layer creating secondary label switching path, by the solution of the present invention, the establishment automatically triggering lower floor LSP can be realized.
Description
Technical field
The present invention relates to the establishing techniques of label switched path under multi-layer multi-domain, particularly relate to a kind of method and system automatically triggering layer creating secondary label switching path (LSP).
Background technology
MPLS and GMPLS network both may comprise multiple domain (domain), also may comprise multilayer (layer).Domain refers in order to the network element set managing common address or divide in order to path computing.Wherein autonomous system (AS) and region (IGP area) are domain.AS is by a common Routing Protocol, carries out the set of routers of Routing Information Exchange each other.IGP Area is the region of an isolated operation IGP algorithm.Topology information in an Area is to being sightless outside Area, and the internal router of a given Area does not know the detailed topology information of Area outside yet.
In GMPLS network, the network that the node not identical by switching technology forms is distinguished by region (REGION) by IETF, such as IP over SDH, SDH over WDM, IP over WDM, so the network of IP, SDH and WDM node composition is respectively different Region.The domain of exchange capacity determines an a kind of REGION, and the network comprising multiple exchange capacity is called multizone network (MRN, multi-REGION network).On the other hand, in hierarchical network, the network comprising a REGION is one deck, and the network comprising multiple REGION is called multitiered network (MLN, multi-layer network).Thus multi-layer multi-domain links together, and multizone network is also multitiered network simultaneously.
Path-calculating element (PCE, Path Computation Element) refers to: topology Network Based, uses constraints to calculate the entity of a network path or route.PCE can be positioned on network node, also can be the server etc. outside a network.PCE by flowing of access engineering data base (TED), by other constraints of bandwidth sum, can calculate the label switched path (TE LSP) based on traffic engineering.
In multitiered network, adopt PCE to be the powerful of flow process obtaining spanning multilayer, PCE can realize global optimization instead of the path optimization at single network level.Based on the network of MPLS and GMPLS, PCE provides and solves interlayer path computing framework, described in IETF RFC5623, proposes two kinds of interlayer computation models for multitiered network, comprises single PCE interlayer path computing model and many PCE interlayer path computing model.
Such as: Fig. 1 at the middle and upper levels network is the IP/MPLS network based on packet switch, and it is made up of LSR (LSR) H1, H2, H3 and H4; Lower floor's network is a GMPLS optical-fiber network, and it is made up of LSR H2, L1, L2 and H3.Suppose there is no TE Link between H2 and H3 of border, upper strata.The H1 of upper layer network needs to set up a LSP and leads to H4.
In single PCE interlayer path computing model, PCE is multilayer PCE, and it can see bilevel topology, and thus it can perform the end-to-end path computation of passing through lower floor.
In many PCE interlayer path computing model, every layer at least exists a PCE, and each PCE only sees the topology of this layer.As: in FIG, if perform individual layer path computing in the upper layer, so will the failure because lacking TE Link, but according to interlayer path computing, just can provide a route H1-H2-H3-H4 on upper strata, and suggestion sets up lower floor LSP H2-L1-L2-H3 at border router.Can find out, between every layer of PCE, need Collaboration computing to pass through the end-to-end optimal path of multilayer.
Draft-ietf-pce-inter-layer-ext expands the PCEP agreement defined in RFC5440, can path computing between supporting layer after expansion.This draft primary expansion three objects: INTER-LAYER object, in path computing request (PCReq) message of PCEP agreement, INTER-LAYER object can be used for representing whether allow interlayer path computing and trigger signaling; SWITCH-LAYER object, can be used for the switching layer that instruction LSP is necessary or no thoroughfare in PCReq; REQ-ADAP-CAP object, can be used to specify the adaptation ability into the request of lower floor LSP two-end-point in computation request message PCReq.In this draft, INTER-LAYER object, SWITCH-LAYER object and REQ-ADAP-CAP object all just can only carry when path computing failure, and namely INTER-LAYER object, SWITCH-LAYER object, REQ-ADAP-CAP object are replied in (PCRep) message in path computing respectively and represented unappeasable constraints together with NO-PATH object.During the success of Er Suan road, INTER-LAYER object, SWITCH-LAYER object and REQ-ADAP-CAP object can not be carried in PCRep message, thus cannot result of calculation path through the switching layer relevant information of node.
In single layer network, REQ-ADAP-CAP object also can be used in PCReq to specify the adaptation ability of LSP two end points.Now, need not use together with INTER-LAYER object.
No matter adopt which kind of PCE model, final PCE can calculate the end-to-end fullpath H1-H2-L1-L2-H3-H4 of spanning multilayer, and return to H1, use RSVP (RSVP subsequently, ResourceReservation Protocol) signaling creates end-to-end LSP, if lower floor LSP H2-L1-L2-H3 not yet creates, in signaling procedure, then need the establishment automatically triggering lower floor LSP, namely when the PATH message of RSVP is sent to H2 along complete end-to-end path (H1-H2-L1-L2-H3-H4) from LSR H1, H2 needs to identify that the starting point of lower floor LSP is self, and can identify that terminal is H3, then temporary block PATH message back downstream is transmitted, first trigger the lower floor LSP created from H2 to H3, lower floor LSP creates upper strata establishment of connection successfully and is waken up, continue establishment of connection process.
The starting point of lower floor LSP and the decision method of terminal, i.e. REGION border is described in IETF RFC4206, namely when the interface exchange capacity of TE Link two end interface changes, expression is REGION border, such as, on the right side of LSR H2 interface interface exchange capacity < LSR L1 on the left of the interface exchange capacity of interface, then represent and enter a new REGION, H2 is REGION border, namely the starting point of lower floor LSP; On the right side of LSR L2 interface interface exchange capacity > LSR H4 on the left of the interface exchange capacity of interface, then represent that exiting REGION, a H4 is REGION border, the namely terminal of lower floor LSP.
According to the starting point of lower floor LSP described in IETF RFC4206 and the decision method of terminal, the edge determination of lower floor LSP needs to know the interface exchange capacity of LSP path each interface on the way, but just current PCEP agreement and RSVP all do not provide the method for carrying this type of information, thus cannot judge the border of lower floor LSP, thus also automatically cannot trigger the establishment of lower floor LSP.
Summary of the invention
In view of this, main purpose of the present invention is the method and system providing a kind of automatic triggering layer creating secondary label switching path, realizes the establishment automatically triggering lower floor LSP.
For achieving the above object, technical scheme of the present invention is achieved in that
Provided by the inventionly a kind ofly realize the method automatically triggering layer creating secondary label switching path, the method comprises:
PCE, in the LSP path computation result returned to LSR, carries complete path and path on the way through the switching layer information of interface;
Described LSR carries described complete path and switching layer information in the RSVP signaling setting up LSP;
The LSR of described RSVP signaling process determines starting point and the terminal on lower floor LSP border, and according to the border of described lower floor LSP, triggers the automatic establishment of lower floor LSP.
In such scheme, described PCE carries complete path and path on the way through the switching layer information of interface in the LSP path computation result returned to LSR, for: PCE is after the path computing request receiving LSR transmission, carry out LSP path computing, obtain the end-to-end route of passing through multilayer, the complete path in path computation result and path are carried by the PCRep returned to LSR through the switching layer information of interface on the way.
In such scheme, the method comprises further: described PCRep carries switching layer information in the attribute list of message body.
In such scheme, described switching layer information comprises INTER-LAYER object and SWITCH-LAYER object, and described SWITCH-LAYER object carries switch type, type of coding, the exchange granularity of interface, described switch type and exchange capacity; Described INTER-LAYER object is for representing whether path is interlayer path.
In such scheme, describedly in the RSVP signaling setting up LSP, carry described complete path and switching layer information, for: the subobject Switching Type carrying explicit route object (ERO) object and described ERO object in the RSVP signaling setting up LSP, be added with switch type, type of coding, the exchange granularity of the path interface of process on the way in described Switching the type field, described complete path is carried by described ERO object.
In such scheme, described starting point and the terminal determining lower floor LSP border, for: each LSR of described RSVP signaling process, the complete path of all carrying according to RSVP signaling and switching layer information compare the exchange capacity of its own interfaces and next LSR interface and exchange granularity, current described LSR interface exchange capacity or exchange granularity be less than next LSR interface exchange capacity or exchange granularity time, current described LSR interface is as lower floor LSP starting point, and the subobject Switching Type of the ERO object traveled through in RSVP signaling and described ERO object, on the way process interface in find first LSR interface identical with exchanging granularity with the exchange capacity of current described LSR interface as lower floor LSP terminal.
The system of a kind of automatic triggering layer creating secondary label switching path provided by the invention, this system comprises: the LSR in PCE, multiple-domain network; Wherein,
PCE, for carrying complete path and path on the way through the switching layer information of interface in the LSP path computation result returned to LSR;
LSR, for carrying described complete path and switching layer information in the RSVP signaling setting up LSP, determines starting point and the terminal on lower floor LSP border, and according to the border of described lower floor LSP, triggers the automatic establishment of lower floor LSP.
In such scheme, described PCE, specifically for after the path computing request receiving LSR transmission, carry out LSP path computing, comprise and carry out interlayer path computing, obtain the end-to-end route of passing through multilayer, the complete path in path computation result and path are carried by the PCRep returned to LSR through the switching layer information of interface on the way.
In such scheme, described LSR, specifically for carrying the subobject Switching Type of ERO object and described ERO object in the RSVP signaling setting up LSP, be added with switch type, type of coding, the exchange granularity of the path interface of process on the way in described Switching the type field, described complete path is carried by described ERO object.
In such scheme, described LSR, the concrete exchange capacity also comparing its own interfaces and next LSR interface for the complete path of carrying according to RSVP signaling and switching layer information with exchange granularity, its own interfaces exchange capacity or exchange granularity be less than next LSR interface exchange capacity or exchange granularity time, determine that its own interfaces is as lower floor LSP starting point, and the subobject Switching Type of the ERO object traveled through in RSVP signaling and described ERO object, on the way process interface in find first LSR interface identical with exchanging granularity with the exchange capacity of its own interfaces as lower floor LSP terminal.
The method and system of a kind of automatic triggering layer creating secondary label switching path provided by the invention, under multi-layer multi-domain scene, PCE carries complete path and path on the way through the switching layer information of interface in the LSP path computation result returned to LSR; LSR carries described complete path and switching layer information in the RSVP signaling setting up LSP, and the LSR of RSVP signaling process determines starting point and the terminal on lower floor LSP border, thus the automatic lower floor LSP that triggers of realization creates; So, can exchange in (GMPLS) network in the multiprotocol label switching (MPLS) or Generalized Multiprotocol Label comprising multiple domain, realize the establishment automatically triggering lower floor LSP, method of the present invention only need be expanded existing draft-ietf-pce-inter-layer-ext agreement a little, method is simple, is easy to realize.
Accompanying drawing explanation
Fig. 1 is the structural representation based on the two-tier network of IP/MPLS and the GMPLS network of packet switch in prior art;
Fig. 2 is the schematic flow sheet that the present invention realizes the method automatically triggering layer creating secondary label switching path;
Fig. 3 is the structural representation of example one of the present invention network used;
Fig. 4 is the structural representation of example two of the present invention network used;
Fig. 5 is the structural representation that the present invention realizes the system automatically triggering layer creating secondary label switching path.
Embodiment
Basic thought of the present invention is: under multi-layer multi-domain scene, and PCE carries complete path and path on the way through the switching layer information of interface in the LSP path computation result returned to LSR; LSR carries described complete path and switching layer information in the RSVP signaling setting up LSP, and the LSR of RSVP signaling process determines starting point and the terminal on lower floor LSP border, thus the automatic lower floor LSP that triggers of realization creates.
Below by drawings and the specific embodiments, the present invention is described in further detail.
The present invention realizes the method automatically triggering layer creating secondary label switching path, and as shown in Figure 2, the method comprises following step:
Step 201:PCE carries complete path and path on the way through the switching layer information of interface in the LSP path computation result returned to LSR;
Concrete, in MPLS or the GMPLS network comprising multiple domain, PCE is after the path computing request receiving LSR transmission, carry out LSP path computing, comprise and carry out interlayer path computing, obtain the end-to-end route of passing through multilayer, the complete path in path computation result and path are carried by the PCRep returned to LSR through the switching layer information of interface on the way; Described switching layer information comprises INTER-LAYER object and SWITCH-LAYER object, and described SWITCH-LAYER object carries switch type, type of coding, the exchange granularity of interface, described switch type and exchange capacity; Described INTER-LAYER object is for representing whether path is interlayer path; Described PCRep carries switching layer information in the attribute list (attribute-list) of message body, such as:
Can find out, in attribute-list, contain INTER-LAYER object and SWITCH-LAYER object;
In draft-ietf-pce-inter-layer-ext, the form of INTER-LAYER object is as shown in the table:
Wherein, flag bit (flag) I (1bit): PCE use I mark in result of calculation message PCRep, indicate whether the path returned is interlayer path.When I is masked as 1, the path returned is interlayer path; When I is masked as 0, represent that the path returned is single hierarchic path.
Flag bit T (1bit): PCE uses T mark to support to indicate LSR the path returned the need of triggering signaling in result of calculation message PCRep.When T mark is set to 1, represents and need to trigger signaling; When T mark is set to 0, represents and do not need to trigger signaling.
The form of SWITCH-LAYER object is as shown in the table:
Wherein, must use when LSP Enc.Type, Switching Type represent calculating path together or prohibit the use the type of coding and switch type of specifying.
Traffic Parameters object is used to indicate the exchange granularity of service layer LSP, and form is relevant to service layer technology, in each technical standard, have related definition.Such as to SDH, SONET, in RFC4606, define the definition of this parameter, comprise the information such as signal type, cascade style and quantity.
Flag bit I (1bit): when I is masked as 1, represents the switch type that the path that calculates has to pass through and specifies and layer corresponding to type of coding; When I is masked as 0, represent the path that calculates definitely can not enter or through and the switch type of specifying and layer corresponding to type of coding.If LSR only need specify SwitchingType, and when not specifying LSP Enc.Type, LSP Enc.Type is set to 0.
Step 202:LSR receives described LSP path computation result, in the RSVP signaling setting up LSP, carry described complete path and switching layer information;
In this step, describedly in the RSVP signaling setting up LSP, carry described complete path and switching layer information, be generally, the subobject Switching Type of ERO object and described ERO object extension is carried in the RSVP signaling setting up LSP, switch type, type of coding, the exchange granularity of the path interface of process is on the way added with in described Switching the type field, described complete path is carried by described ERO object, and the RSVP signaling of the described LSP of foundation is generally PATH message.
The LSR of step 203:RSVP signaling process determines starting point and the terminal on lower floor LSP border according to the decision method on REGION border, and according to the border of described lower floor LSP, triggers the automatic establishment of lower floor LSP;
Concrete, each LSR of described RSVP signaling process, the complete path of all carrying according to RSVP signaling and switching layer information compare the exchange capacity of its own interfaces and next LSR interface and exchange granularity, current described LSR interface exchange capacity or exchange granularity be less than next LSR interface exchange capacity or exchange granularity time, current described LSR interface is as lower floor LSP starting point, and the subobject Switching Type of the ERO object traveled through in RSVP signaling and described ERO object extension, on the way process interface in find first LSR interface identical with exchanging granularity with the exchange capacity of current described LSR interface as lower floor LSP terminal, after the border determining lower floor LSP, after the starting point namely determining lower floor LSP and terminal, as the LSR of the LSR interface of lower floor LSP starting point according to the border of described lower floor LSP, trigger the automatic establishment of lower floor LSP,
The instantiation of this step is as follows:
Example one: in this example, as shown in Figure 3, network packet is containing two-layer, H1, H2, H3, H4 are upper strata LSR, H2, L1, L2, H3 are lower floor LSR, H1 is connected with a interface of H2 by a interface, H2 is connected with a interface of L1 by b interface, the b interface of L1 is connected with the b interface of L2, the a interface of L2 is connected with the b interface of H3, and a interface of H3 is connected with a interface of H4, wherein, the exchange capacity of H1, H2, H3, H4 total interface is PSC and exchange granularity is identical, and the exchange capacity of L1, L2 total interface is TDM and exchange granularity is identical.Described RSVP signaling is specially PATH message, and the subobject Switching Type of the ERO object that described PATH message is carried and described ERO object extension is: { H1a, PSC, H2a, PSC, H2b, PSC, L1a, TDM, L1b, TDM, L2b, TDM, L2a, TDM, H3b, PSC, H3a, PSC, H4a, PSC}.After described H1 receives PATH message, analyze the ERO object and Switching Type that carry in PATH message, compare the exchange capacity of H1a and H2a and exchange granularity, because exchange capacity is all PSC, exchange granularity also identical, then PATH message continues to transmit toward downstream; After H2 receives PATH message, compare the exchange capacity of H2b and exchange the exchange capacity of granularity and next node L1a and exchange granularity, now the exchange capacity TDM of the exchange capacity PSC < L1a of H2b, determines that H2b is the starting point of lower floor LSP; Then, H2 travels through ERO object and SwitchingType, to find in follow-up ERO object first exchange capacity and be that the interface of PSC is H3b and the exchange granularity of H3b is identical with H2b, then H3b is the terminal of lower floor LSP, that is: be the exchange capacity of PSC=starting point H2b by search the exchange capacity L1a=L1b=L2b=L2a of interface be all the exchange capacity of TDM, H3b, the exchange granularity of H3b is identical with H2b, and PSC < TDM, thus H3b is the terminal of lower floor LSP.Afterwards, H2, according to border H2b and H3b of lower floor LSP, triggers the automatic foundation of lower floor LSP.
Example two: in this example, as shown in Figure 4, network packet is containing three layers, and belong to the situation that nested LSP sets up, wherein H1, H2, H3, H4 are upper strata LSR, and M1, M2 are lower floor LSR, and L1, L2 are the LSR of more lower one deck.After H2 receives PATH message, compare the exchange capacity of H2b and next node M1a and exchange granularity, when the exchange capacity of the exchange capacity < M1a of H2b, determining that H2b is the starting point of lower floor LSP; Then, H2 travels through ERO object and Switching Type, the interface finding in follow-up ERO object first exchange capacity identical with H2b with exchanging granularity is H3b, then H3b is the terminal of lower floor LSP, afterwards, H2, according to border H2b and H3b of lower floor LSP, triggers the automatic foundation of lower floor LSP, and PATH message carries ERO object and Switching Type continuation transmission simultaneously.When PATH message arrives M1, M1 compares the exchange capacity of the exchange capacity=L1a of M1b, but during the exchange granularity of the exchange granularity < L1a of M1b, determine that M1b is lower floor LSP starting point, according to above-mentioned traversal method, because M2b is that in follow-up ERO subobject, first exchange capacity is identical with M1b with exchange granularity, determine that M2b is lower floor LSP terminal, the LSP that M1 then triggers more lower M1b to M2b creates automatically.
In order to realize said method, the present invention also provides a kind of system of automatic triggering layer creating secondary label switching path, and as shown in Figure 5, this system comprises: the LSR 62 in PCE 61, multiple-domain network; Wherein,
PCE 61, for carrying complete path and path on the way through the switching layer information of interface in the LSP path computation result returned to LSR 62;
LSR 62, for carrying described complete path and switching layer information in the RSVP signaling setting up LSP, determines starting point and the terminal on lower floor LSP border, and according to the border of described lower floor LSP, triggers the automatic establishment of lower floor LSP;
Described PCE 61, specifically for after the path computing request receiving LSR 62 transmission, carry out LSP path computing, comprise and carry out interlayer path computing, obtain the end-to-end route of passing through multilayer, the complete path in path computation result and path are carried by the PCRep returned to LSR 62 through the switching layer information of interface on the way; Described switching layer information comprises INTER-LAYER object and SWITCH-LAYER object, and described SWITCH-LAYER object carries switch type, type of coding, the exchange granularity of interface, described switch type and exchange capacity; INTER-LAYER object is for representing whether path is interlayer path; Described PCRep carries INTER-LAYER object and SWITCH-LAYER object in the attribute list of message body;
Described LSR 62 carries described complete path and switching layer information in the RSVP signaling setting up LSP, be specially: described LSR 62 carries the subobject Switching Type of ERO object and described ERO object extension in the RSVP signaling setting up LSP, be added with switch type, type of coding, the exchange granularity of the path interface of process on the way in described Switching the type field, described complete path is carried by described ERO object;
Described LSR 62 determines starting point and the terminal on lower floor LSP border according to the decision method on REGION border, be specially: the complete path that described LSR 62 carries according to RSVP signaling and switching layer information compare the exchange capacity of its own interfaces and next LSR interface and exchanges granularity, its own interfaces exchange capacity or exchange granularity be less than next LSR interface exchange capacity or exchange granularity time, determine that its own interfaces is as lower floor LSP starting point, and the subobject Switching Type of the ERO object traveled through in RSVP signaling and described ERO object extension, on the way process interface in find first LSR interface identical with exchanging granularity with the exchange capacity of its own interfaces as lower floor LSP terminal,
Described LSR 62 finds out the terminal on the border of lower floor LSP, be specially, described LSR 62 travels through the subobject Switching Type of ERO object in RSVP signaling and described ERO object extension, on the way process interface in find first LSR interface identical with the exchange capacity when its own interfaces as lower floor LSP terminal.
By method of the present invention, can in MPLS or the GMPLS network comprising multiple domain, realize the establishment automatically triggering lower floor LSP, method of the present invention only need be expanded existing draft-ietf-pce-inter-layer-ext agreement a little, method is simple, is easy to realize.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. realize the method automatically triggering layer creating secondary label switching path, it is characterized in that, the method comprises:
Path-calculating element (PCE), in label switched path (LSP) path computation result returned to LSR (LSR), carries complete path and path on the way through the switching layer information of interface;
Described LSR carries described complete path and switching layer information setting up in the RSVP of LSP (RSVP) signaling;
The LSR of described RSVP signaling process determines starting point and the terminal on lower floor LSP border, and according to the border of described lower floor LSP, triggers the automatic establishment of lower floor LSP;
Wherein, described PCE carries complete path and path on the way through the switching layer information of interface in the LSP path computation result returned to LSR, for: PCE is after the path computing request receiving LSR transmission, carry out LSP path computing, obtain the end-to-end route of passing through multilayer, the complete path in path computation result and path are replied (PCRep) through the switching layer information of interface by the path computing returned to LSR on the way and carries; Described PCRep carries switching layer information in the attribute list of message body.
2. method according to claim 1, it is characterized in that, described switching layer information comprises INTER-LAYER object and SWITCH-LAYER object, and described SWITCH-LAYER object carries switch type, type of coding, the exchange granularity of interface, described switch type and exchange capacity; Described INTER-LAYER object is for representing whether path is interlayer path.
3. method according to claim 2, it is characterized in that, describedly in the RSVP signaling setting up LSP, carry described complete path and switching layer information, for: the subobject Switching Type carrying explicit route object (ERO) object and described ERO object in the RSVP signaling setting up LSP, be added with switch type, type of coding, the exchange granularity of the path interface of process on the way in described Switching the type field, described complete path is carried by described ERO object.
4. method according to claim 2, it is characterized in that, described starting point and the terminal determining lower floor LSP border, for: each LSR of described RSVP signaling process, the complete path of all carrying according to RSVP signaling and switching layer information compare the exchange capacity of its own interfaces and next LSR interface and exchange granularity, current described LSR interface exchange capacity or exchange granularity be less than next LSR interface exchange capacity or exchange granularity time, current described LSR interface is as lower floor LSP starting point, and the subobject Switching Type of the ERO object traveled through in RSVP signaling and described ERO object, on the way process interface in find first LSR interface identical with exchanging granularity with the exchange capacity of current described LSR interface as lower floor LSP terminal.
5. automatically trigger a system for layer creating secondary label switching path, it is characterized in that, this system comprises: the LSR in PCE, multiple-domain network; Wherein,
PCE, for carrying complete path and path on the way through the switching layer information of interface in the LSP path computation result returned to LSR;
LSR, for carrying described complete path and switching layer information in the RSVP signaling setting up LSP, determines starting point and the terminal on lower floor LSP border, and according to the border of described lower floor LSP, triggers the automatic establishment of lower floor LSP;
Described PCE, specifically for after the path computing request receiving LSR transmission, carry out LSP path computing, comprise and carry out interlayer path computing, obtain the end-to-end route of passing through multilayer, the complete path in path computation result and path are carried by the PCRep returned to LSR through the switching layer information of interface on the way; Described PCRep carries switching layer information in the attribute list of message body.
6. system according to claim 5, it is characterized in that, described LSR, specifically for carrying the subobject Switching Type of ERO object and described ERO object in the RSVP signaling setting up LSP, be added with switch type, type of coding, the exchange granularity of the path interface of process on the way in described Switching the type field, described complete path is carried by described ERO object.
7. system according to claim 6, it is characterized in that, described LSR, the concrete exchange capacity also comparing its own interfaces and next LSR interface for the complete path of carrying according to RSVP signaling and switching layer information with exchange granularity, its own interfaces exchange capacity or exchange granularity be less than next LSR interface exchange capacity or exchange granularity time, determine that its own interfaces is as lower floor LSP starting point, and the subobject Switching Type of the ERO object traveled through in RSVP signaling and described ERO object, on the way process interface in find first LSR interface identical with exchanging granularity with the exchange capacity of its own interfaces as lower floor LSP terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010538148.2A CN102469008B (en) | 2010-11-09 | 2010-11-09 | A kind of method and system of automatic triggering layer creating secondary label switching path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010538148.2A CN102469008B (en) | 2010-11-09 | 2010-11-09 | A kind of method and system of automatic triggering layer creating secondary label switching path |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102469008A CN102469008A (en) | 2012-05-23 |
| CN102469008B true CN102469008B (en) | 2015-10-21 |
Family
ID=46072208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010538148.2A Expired - Fee Related CN102469008B (en) | 2010-11-09 | 2010-11-09 | A kind of method and system of automatic triggering layer creating secondary label switching path |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102469008B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104468354B (en) * | 2013-09-17 | 2018-06-26 | 华为技术有限公司 | Data transmission processing method and device |
-
2010
- 2010-11-09 CN CN201010538148.2A patent/CN102469008B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102469008A (en) | 2012-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7593340B2 (en) | Method and system for multi-domain route computation | |
| CN103368843B (en) | The OAM label switched path of the quick heavy-route of protected label switched path | |
| US7672313B2 (en) | Method for realizing route forwarding in network | |
| EP2151959B1 (en) | Path calculation device for calculating and controlling paths in a network | |
| US9432281B2 (en) | Apparatus and method for a communication network | |
| CN101155124A (en) | Method for implementing fast multicast rerouting and its node | |
| US20080170854A1 (en) | Method Of Identifying Domain-To-Domain Link Based On Automatically Switched Optical Network | |
| CN102904810B (en) | Label switching path calculating method and label switching path calculating device | |
| WO2011017945A1 (en) | Method for inheriting attribute of forwarding adjacency in multilayer network and corresponding multilayer network | |
| US7826394B2 (en) | Method, system and device for implementing traffic engineering | |
| CN107888497A (en) | Communication means, the network equipment and computer-readable recording medium | |
| CN105634941A (en) | Cross-domain path calculation method and device | |
| CN101296178B (en) | Inter-domain flux engineering route computing method and route computing device | |
| CN101945048B (en) | Method, system and device for establishing label switch path | |
| CN103067275B (en) | A kind of method for building up of label switched path and system | |
| CN101599979B (en) | Method for realizing IP telecommunication network based on tunnel | |
| CN102469008B (en) | A kind of method and system of automatic triggering layer creating secondary label switching path | |
| CN101257455A (en) | Label pre-distributing mechanism based on T-MPLS grouping conveying network | |
| CN101997760B (en) | A kind of method and system determining head and the tail node on forwarding adjacency label switched path | |
| CN102480406A (en) | Method and system for building cross-domain end-to-end two-way label switching path | |
| CN101621453A (en) | Method and system for ensuring consistency of differentiated services-aware traffic engineering network configuration parameters | |
| CN101051992B (en) | Method for calculating customer layer service route in multilayer network | |
| CN104283813B (en) | A kind of method and system handling RSVP-TE signaling | |
| Xia | Research on signaling mechanism based on convergence network | |
| Romeral et al. | Multi-domain G/MPLS recovery paths using PCE |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151021 Termination date: 20201109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |