CN103067275A - Establishment method and establishment system of label switching path - Google Patents
Establishment method and establishment system of label switching path Download PDFInfo
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Abstract
The invention discloses an establishment method of a label switching path (LSP). The establishment method of the LSP comprises the following steps: a head node of the LSP calculates information of a path through which an LSP to be established needs to pass according to management plane requests and network topology information; the head node of the LSP organizes a first signaling message which carries extended periodic line mark information to be sent to a downstream node in a hop-by-hop mode according to the obtained information of the path until a tail node of the LSP receives the first signaling message and allocates transmitting planes to be crossed successfully; after the tail node of the LSP receives the first signaling message and allocates the transmitting planes to be crossed successfully, a second signaling message is organized to be sent to an upstream node in a hop-by-hop mode until the head node of the LSP receives the second signaling message and allocates the transmitting planes to be crossed successfully. Simultaneously, the invention further discloses an establishment system of the LSP. By adopting the establishment system of the LSP, the periodic line heavy-route attribute is increased, the types of the LSP are enriched, and intelligent protection and recovery effects are achieved.
Description
Technical field
The present invention relates to label switched path (LSP, the Label Switching Path) technology of the communications field, relate in particular to method for building up and the system of a kind of LSP.
Background technology
Development along with the large fusion of network and network flattening, boundary between original different type network is fuzzy gradually, the multitiered network of the broad sense under Unified Control Plane becomes the target that people pursue, flexible and efficient scheduling between final realization different layers network is with management and the raising survivability of optimized network business.
When network breaks down, in time carry out failover, ensure that network application is unaffected.Concrete, among the RFC (Request For Comments) 4427 protection among the LSP is recovered (Recovery) and be divided into: link (this locality) protection recovers (Span recovery), segment protect recovers (Segment recovery) and end-to-end protection recovers (End-to-End recovery); Wherein, it is to recover to reach protection to LSP by the protection to two internodal links of LSP that link protection recovers, and described link protection recovers can be subdivided into again link protection and link-recovery dual mode.
RFC 4202 has defined the protective capability that the link protection type represents link in the Routing expansion of general multiple protocols sign exchange agreement (GMPLS, Generalized MultiprotocolLabel Switching); RFC 3471 has defined protection (PROTECTION) object in the signaling capability of GMPLS is described, wherein, and the protective capability of the link sign that comprises (Link Flags) expression LSP link.
Existing standard sums up in the point that the attribute of service layer in the link protection attribute of client layer chain-link, and link attribute only has the protection association attributes at present, as: unprotect, special-purpose 1+1 protection, protection in special-purpose 1: 1, share protect, enhancing protection; But these link protection attributes can only be described the link with protection, if for client layer provides service layer's business of service to have to recover attribute or protection recovers the attribute of combination, and the then at present not definition of attribute that has of the link of its formation.
At present; by ospf (OSPF; Open Shortest Path First) inundation mechanism with information inundations such as link protection types to the whole network node; the path-calculating element of each node is in conjunction with the request of setting up; selection meets the link of link protection type; and by RSVP (RSVP; ResourceReservation Protocol) signaling is set up LSP at corresponding link; like this, the LSP of foundation just can have the link protection ability of definition among the RFC 4427.
In multitiered network, comprise client layer and service layer, the employed link of client layer LSP can be provided by the LSP of service layer, and corresponding, the protection of this link (recovery) ability is also just embodied by protection (recovery) ability of the LSP of service layer; In multitiered network, between the boundary node of layer, be provided with a LSP, if with the traffic engineering (TE of this LSP as client layer, Traffic Engineering) link carries out inundation, so, this LSP can be described as forwarding adjacency label switched path (FA-LSP, Forwarding Adjacency LSP), and this TE Link can be described as FA; There is not the Routing Adjacency relation between the end points of FA, but has the signaling neighbouring relations.
But, do not mention this value how of link protection type of FA in the existing protocol; Simultaneously, do not mention how setting up the LSP with link-recovery ability and have the LSP that link protection recovers binding ability in the existing protocol yet.
Summary of the invention
In view of this, main purpose of the present invention is to provide method for building up and the device of a kind of LSP, can set up the LSP with link-recovery ability or link protection recovery binding ability, enriches the type of LSP, thereby realizes more intelligent protection reset mode.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of method for building up of label switching path LSP, described method comprises:
The first node of LSP calculates the routing information of the required process of LSP to be set up according to management plane request and network topological information;
The routing information tissue that the first node basis of LSP obtains carries the first signaling message of the link flag information after the expansion, and described the first signaling message hop-by-hop sent to downstream node, until the tail node of LSP receives described the first signaling message and configuration transmits the crossing on the same level success; Wherein, the link flag information after the described expansion comprises that link heavy-route type information and link protection recover the type information of combination;
After the tail node of LSP receives that the first signaling message and configuration transmit the crossing on the same level success, organize the second signaling message and the second signaling message hop-by-hop is sent to upstream node, and each upstream node transmits the crossing on the same level success according to described the second signaling information configuration, until the first node of LSP receives the second signaling message and configuration transmits the crossing on the same level success.
In the such scheme, the first node of described LSP calculates before the routing information of the required process of LSP to be set up according to management plane request and network topological information, and the method also comprises:
By ospf inundation mechanism link protection type information, link heavy-route type information are flooded to the whole network node.
In the such scheme, described the first signaling message hop-by-hop is sent to before the downstream node, the method also comprises:
Whether judgement exists the link that satisfies condition with the node that the first signaling message hop-by-hop sends to downstream node, if there is the link that satisfies condition, sends to the downstream node that is adjacent then in described link application and reservation resource, and with the first signaling message; Otherwise, determine whether and need to set up forwarding adjacency FA at described node.
In the such scheme, described determining whether need to be set up FA at described node, for:
Judge whether described node is whether mixed node exists FA, if described node be mixed node and do not have FA, then need to set up FA at described node; Otherwise, need to not set up FA at described node.
In the such scheme, described determining whether need to be set up FA at described node, further comprises:
If need to set up FA at described node, then hang up client layer the first signaling message, and create the delivery port that FA needs; If need to not set up FA at described node, then return LSP and set up failure response.
The present invention also provides the system that sets up of a kind of LSP, and described system comprises: first node and tail node; Wherein,
Described first node, be used for calculating according to management plane request and network topology message the PATH of the required process of LSP to be set up, tissue carries the first signaling message of the link flag information after the expansion, and described the first signaling message hop-by-hop sent to downstream node, until the tail node of LSP receives the first signaling message and configuration transmits the crossing on the same level success; Wherein, the link flag information after the described expansion comprises that link heavy-route type information and link protection recover the type information of combination;
Described tail node is used for tissue the second signaling message hop-by-hop and sends upstream node, until the first node of LSP receives the second signaling message and configuration transmits the crossing on the same level success.
In the such scheme, described system also comprises:
Intermediate node be used for to receive the upstream node that is adjacent or the signaling message of downstream node, and described signaling message is sent to downstream node or the upstream node that is adjacent; And each intermediate node transmits the crossing on the same level success according to described the second signaling information configuration.
In the such scheme, described first node, tail node and intermediate node include the link judging unit and FA creates judging unit; Wherein,
Described link judging unit is used for decision node and whether has the link that satisfies condition, if there is the link that satisfies condition, then node is applied for and the reservation resource at described link, and organizes the first signaling message to send to the downstream node that is adjacent;
Described FA creates judging unit, is used for determining whether and need to setting up FA at node.
In the such scheme, described FA creates judging unit and specifically is used for: whether decision node be mixed node and whether have FA, if described node be mixed node and do not have FA, then determine and need to set up FA at described node; Otherwise, determine need to not set up FA at described node.
In the such scheme, described FA creates judging unit and also is used for: determining need to be when described node be set up FA, and described node is hung up client layer the first signaling message, and creates the delivery port that FA needs; Determine need to not set up FA at described node, described node returns LSP and sets up failure response.
The method for building up of LSP provided by the present invention and system, on the basis of existing link protection attribute, increased link heavy-route attribute, and it is abundanter, more flexible to make link protection recover attribute, and then can sets up the LSP with link-recovery ability or link protection recovery binding ability; Simultaneously, also enrich the type of LSP, reached more intelligent protection recovery effects.
The present invention is also by increasing the method for link heavy-route type; the link-recovery type that represents service layer in the multitiered network; link heavy-route type and link protection type are combined the combination of the link protection recovery of presentation services layer; with the method that realizes that more eurypalynous protection recovers under the multitiered network; also so that setting up of client layer business is convenient, it is more that the multilayer service protection recovers combination.
Description of drawings
Fig. 1 is the link heavy-route type schematic diagram that the present invention increases newly;
Fig. 2 is the PROTECTION object schematic diagram in the existing standard;
Fig. 3 is the PROTECTION object schematic diagram after the present invention expands;
Fig. 4 is the realization flow schematic diagram that the present invention sets up the LSP method with link-recovery ability or link protection recovery binding ability;
The client layer LSP that Fig. 5 embodiment of the invention need to be set up FA-LSP automatically sets up the realization flow schematic diagram of process;
The client layer LSP that Fig. 6 embodiment of the invention does not need automatically to set up FA-LSP sets up the realization flow schematic diagram of process;
Fig. 7 is the composition structural representation that a kind of LSP of the embodiment of the invention sets up system;
Fig. 8 is the composition structural representation of embodiment of the invention node.
Embodiment
Below in conjunction with drawings and the specific embodiments the present invention is remake further detailed explanation.
Fig. 1 is the link heavy-route type schematic diagram that the present invention increases newly, and as shown in Figure 1, newly-increased link subtype-length-value (TLV, Type-Length-Value) type is link heavy-route type (LinkRerouting Type), accounts for 32 bits; Comprise: heavy-route head (Rerouting Cap) field accounts for 8 bits; Keep (Reserved) field, account for 24 bits.
Described link heavy-route type is used for representing the heavy-route ability of link, namely is used for representing the recovery capability of link, and its value mode comprises:
0x00:No Rerouting, expression is without heavy-route;
0x01:(Full) Rerouting, expression (fully) heavy-route.
The present invention is not limited to certain specific extended mode, as long as link heavy-route type information can be flooded to the whole network node.
Fig. 2 is the PROTECTION object schematic diagram in the existing standard, Fig. 3 is the PROTECTION object schematic diagram after the present invention expands, as shown in Figure 3, the present invention expands to 8 bits with the link sign (Link Flags) of original 6 bits in the existing standard, and the Link Flags value after the expansion comprises:
0x01:Extra Traffic (extra traffic);
0x02:Unprotected (unprotect);
0x04:Shared (share protect);
0x08:Dedicated1: 1 (protection in special-purpose 1: 1);
0x10:Dedicated 1+1 (special-purpose 1+1 protection);
0x20:Enhanced (strengthening protection);
0x40:(Full) Routing ((fully) heavy-route);
0x80: keep.
Wherein, latter two value, namely 0x40 and 0x80 can arrange a more than bit, to represent the type of multiple link protection type, link heavy-route type or link protection and recovery combination for newly-increased value.But the present invention is not limited to certain specific extended mode, as long as the link flag information after the expansion that LSP can be needed is delivered to downstream node.
Fig. 4 is the realization flow schematic diagram that the present invention sets up the method for the LSP with link-recovery ability or link protection recovery binding ability, and as shown in Figure 4, the method may further comprise the steps:
The first node of step 401:LSP calculates the routing information of the required process of LSP to be set up according to management plane request and network topological information;
Concrete, described routing information comprises routing iinformation, layer boundary information, link circuit resource information etc.;
The routing information tissue that the first node basis of step 402:LSP obtains carries the first signaling message of the link flag information after the expansion, and described the first signaling message hop-by-hop sent to downstream node, until the tail node of LSP receives described the first signaling message and configuration transmits the crossing on the same level success; Wherein, the link flag information after the described expansion comprises that link heavy-route type information and link protection recover the type information of combination;
Concrete, described the first signaling message can but be not limited to path (Path) message, comprise link protection and link-recovery capabilities message that described LSP wishes in described the first signaling message.
Because the present invention expands the Link Flags of the PROTECTION object in the existing standard, Link Flags after the expansion has increased (fully) heavy-route and has kept two values, and newly-increased value can arrange a more than bit, can represent the combination of kinds of protect type or protection and recovery; So, the Link Flags after the expansion can be delivered to downstream node with the link heavy-route kind of message that LSP needs.
For example, if the link protection that client layer LSP requires and recovery type are respectively: unprotect and (fully) heavy-route, namely wish client layer unprotect recovery capability, only there is recovery capability in service layer; So, take the Path signaling as example, that is: the Link Flags value of PROTECTION object is 0x42 (unprotect and complete rerouting), and LSP Flags value is 0x00 (unprotect).
Concrete, described the first signaling message hop-by-hop is sent to downstream node, further comprise:
Whether judgement exists the link that satisfies condition with the node that the first signaling message hop-by-hop sends to downstream node, if there is the link that satisfies condition, send to the downstream node that is adjacent then at this link application and reservation link circuit resource, and with the first signaling message; Otherwise, determine whether and need to set up FA at described node.
Concrete, describedly determine whether that need to set up FA at described node is: judge whether described node is mixed node and whether has FA, if described node be mixed node and do not have FA, then need to set up FA at described node; Otherwise, need to not set up FA at described node.
Here, described mixed node is: the node that has simultaneously the configuration of client layer and service layer.
Concrete, described determining whether need to be set up FA at described node, further comprises:
If need to set up FA at this node, then hang up client layer the first signaling message, and create the delivery port that FA needs; If need to not set up FA at this node, return LSP and set up failure response.
Here, if describedly need to not set up FA at this node, return LSP and set up failure response, further comprise: if node headed by this node, then first node returns the first signaling message failure response; If this node is non-first node, then send to upstream node by this joint structure the 3rd signaling message and hop-by-hop, until first node receives the 3rd signaling message.
Here, described the 3rd signaling message is the first signaling message failure response, and namely LSP sets up failure response; Described the 3rd signaling message can be but be not limited to path error (PathErr) message.
Concrete, described hang-up client layer the first signaling message, and create the delivery port that FA needs, also comprise:
The protection of obtaining the LSP of service layer from client layer the first signaling message recovers information, in service layer's link application and reservation resource, and organization service layer the first signaling message hop-by-hop send to downstream node, until the tail node of service layer receives service layer's the first signaling message and configuration transmits the crossing on the same level success; After the tail node of service layer receives service layer's the first signaling message and the success of configuration transmission crossing on the same level, the delivery port that needs at tail node establishment generation FA also needs to activate FA simultaneously, and organization service layer the second signaling message hop-by-hop sends to upstream node, until the first node of service layer receives that the second signaling message and configuration transmit the crossing on the same level success, and the delivery port of the FA link of the first node of activation service layer, cancel the hang-up of client layer the first signaling message, thereby can continue the transmission of client layer the first signaling message.
Here, if described node is first node or the tail node of FA-LSP, need to create the delivery port that generation FA needs, also need to activate simultaneously FA, and FA information is flooded in the network, so that the foundation of client layer LSP.
After the tail node of step 403:LSP receives that the first signaling message and configuration transmit the crossing on the same level success, organize the second signaling message and the second signaling message hop-by-hop is sent to upstream node, and each upstream node transmits the crossing on the same level success according to described the second signaling information configuration, until the first node of LSP receives the second signaling message and configuration transmits the crossing on the same level success;
Wherein, described the second signaling message can be but be not limited to reserve (Resv) message.
The embodiment of Fig. 5, Fig. 6 all is to have increased link heavy-route attribute newly in the present invention, and the Link Flags of PROTECTION object in the existing standard has been carried out carry out in the situation of expansion.
Because the link with link protection ability can realize by pre-configured different protection type on this link also can having the LSP of protective capability and generate FA by foundation and realize; The former need to pass through manual configuration protection group information, and the latter can be by the FA-LSP that control plane is set up automatically and configuration has protective capability.And have the link of link-recovery ability or have link protection recover the link of binding ability can only be by the FA-LSP with recovery capability, have the FA-LSP that protection recovers binding ability and provide.Fig. 5 has provided the process of setting up that need to automatically set up the client layer LSP of FA-LSP, and Fig. 6 has provided the process of setting up of the client layer LSP that does not need automatically to set up FA-LSP.
Fig. 5 sets up the realization flow schematic diagram of process for the client layer LSP that need to automatically set up FA-LSP, in the present embodiment, the link protection that client layer LSP requires and recovery type are respectively: unprotect and (fully) heavy-route, namely wish client layer unprotect recovery capability, only there is recovery capability in service layer; Among Fig. 5, node headed by the node a, and be non-mixed node; Node i, k are mixed node, and node j, j+1, z are non-mixed node; Wherein, node i and node k are respectively first node and the tail node of the LSP of service layer, and node z is the tail node of client layer LSP; And between node a and the node i, all there has been client layer chain-link between node k and the node z, do not had client layer chain-link between node i and the node k, need between node i and node k, create the delivery port of FA; But equal presence service layer links between node i and the node j, between node j and the node j+1, between node j+1 and the node k; As shown in Figure 5, described LSP Establishing process may further comprise the steps:
Step 501: the node a of client layer LSP according to management plane request and network topological information calculate this LSP the routing information of process;
Here, described LSP the path of process comprise mixed node i, k, non-mixed node j, j+1, z.
Step 502: because node a is non-mixed node, and the client layer chain-link between node a and the node i exists, in this client layer chain-link application and reserve resource, and the downstream node i that organizes the first signaling message to send to be adjacent;
Concrete; comprise link protection and link-recovery capabilities message that described LSP wishes in described the first signaling message; take the Path signaling as example; that is: the Link Flags value of PROTECTION object is 0x42 (unprotect and complete rerouting), and LSP Flags value is 0x00 (unprotect).
Step 503: after node i is received the first signaling message, because node i is mixed node, and the link that client layer needs does not exist, then hang up client layer the first signaling message, request creates the delivery port that FA needs, the protection of obtaining the LSP of service layer from client layer the first signaling message recovers information, and in service layer's link application and reservation resource, and organization service layer the first signaling message sends to the downstream node j that is adjacent;
Here; take the Path signaling as example; because the Link Flags value of the PROTECTION object in client layer the first signaling message is 0x42; the protection recovery capability that service layer is described only is unprotect and complete rerouting; therefore; protection recovery capability and the link protection recovery capability of LSP in structure service layer the first signaling message, that is: the LSP Flags value of PROTECTION object is 0x01 (complete rerouting), the LinkFlags value is 0x02 (unprotect).
Step 504: after node j receives the first signaling message, because node j is non-mixed node, and and the service layer's link between the node j+1 exists, and in this link application and reserve resource, and the first signaling message sent to the downstream node j+1 that is adjacent;
At this moment, the Link Flags value of PROTECTION object is 0x02 (unprotect), LSP Flags value 0x01 (complete rerouting).
Step 505: after node j+1 receives the first signaling message, because node j+1 is non-mixed node, and and the service layer's link between the node k exists, and in this link application and reserve resource, and the first signaling message sent to the downstream node k that is adjacent;
Step 506: after node k receives the first signaling message, because node k is mixed node and is the tail node of the LSP of service layer, therefore, request creates and generates the delivery port that FA needs, after service layer's link application and reserving resource, configuration transmits the crossing on the same level success, and the upstream node j+1 that organizes the second signaling message to send to be adjacent, and activates simultaneously the delivery port of FA link;
Step 507: after node j+1 received the second signaling message, because node j+1 is non-mixed node, configuration transmitted the crossing on the same level success, and the second signaling message is sent to its adjacent upstream node j;
Step 508: after node j received the second signaling message, because node j is non-mixed node, configuration transmitted the crossing on the same level success, and the second signaling message is sent to the upstream node i that is adjacent;
Step 509: after node i is received the second signaling message, because node i is mixed node and is the first node of the LSP of service layer, the success of configuration transmission crossing on the same level, and the delivery port of activation FA link, the hang-up of cancellation client layer the first signaling message continues client layer the first signaling message; Node i is in port application and the reservation client layer resource of the new FA link that activates; and the first signaling message sent to its adjacent downstream node k; comprise link protection and link-recovery ability that this LSP wishes in wherein said the first signaling message; that is: the Link Flags value of PROTECTION object is 0x42 (unprotect and complete rerouting), and the LSPFlags value is 0x00 (unprotect).
Step 510: after node k receives the first signaling message, because of and node z between client layer chain-link exist, in the application of this link and reserve resource, and the first signaling message is sent to the downstream node z that is adjacent;
Here, the Link Flags value of PROTECTION object is 0x42 (unprotect and complete rerouting), and LSP Flags value is 0x00 (unprotect).
Step 511: after node z received the first signaling message, owing to node z is non-mixed node and is the tail node of client layer LSP, configuration transmitted the crossing on the same level success, and organizes the second signaling message to send to its adjacent upstream node k;
Step 512: after node k received the second signaling message, configuration transmitted the crossing on the same level success, and the second signaling message is sent to its adjacent upstream node i;
Step 513: after node i was received the second signaling message, configuration transmitted the crossing on the same level success, and the second signaling message is sent to its adjacent upstream node a;
Step 514: after node a received the second signaling message, owing to node a is non-mixed node and is the first node of client layer LSP, configuration transmitted the crossing on the same level success, and client layer LSP is successfully established.
The protective capability of the formed FA of FA-LSP of above-mentioned automatic foundation is the 0x02 unprotect, and recovery capability is 0x01 (fully) heavy-route.
Fig. 6 is the realization flow schematic diagram that client layer LSP that the present invention does not need automatically to set up FA-LSP sets up process, in the present embodiment, the link protection that client layer LSP requires recovers type and is respectively unprotect and (fully) heavy-route, namely wish client layer unprotect recovery capability, only there is recovery capability in service layer; Among Fig. 6, node headed by the described node a; Node i, k are mixed node, and node z is non-mixed node, and node z is the tail node of client layer LSP; All there has been client layer chain-link between node a and node i, node i and node k, node k and node z, need between node i and node k, do not created the delivery port of FA; As shown in Figure 6, described LSP Establishing process may further comprise the steps:
Step 601: the node a of client layer LSP according to management plane request and network topological information calculate this LSP the routing information of process;
Here, the described LSP that calculates the path of process comprise mixed node i, k, and non-mixed node z.
Step 602: because node a is non-mixed node, and and node i between client layer chain-link exist, in this link application and reserve resource, and the downstream node i that organizes the first signaling message to send to be adjacent;
Concrete, comprise link protection and link-recovery ability that described LSP wishes in described the first signaling message.
Concrete, take the Path signaling as example, the Link Flags value of PROTECTION object is 0x42 (unprotect and complete rerouting), LSP Flags value is 0x00 (unprotect).
Step 603: after node i is received the first signaling message because and the client layer chain-link between the node k exist, so the first signaling message sent to the downstream node k that is adjacent;
Step 604: after node k receives the first signaling message because and the client layer chain-link between the node z exist, so the first signaling message sent to the downstream node z that is adjacent;
Step 605: after node z received the first signaling message, because node z is non-mixed node and be the tail node of LSP, configuration transmitted crossing on the same level successfully, and the upstream node k that organizes the second signaling message to send to be adjacent;
Step 606: after node k received the second signaling message, configuration transmitted the crossing on the same level success, and the second signaling message is sent to the upstream node i that is adjacent.
Step 607: after node i was received the second signaling message, configuration transmitted the crossing on the same level success, and the second signaling message is sent to the upstream node a that is adjacent;
Step 608: after node a received the second signaling message, owing to node a is non-mixed node and is the first node of LSP, configuration transmitted the crossing on the same level success, and client layer LSP is successfully established.
In this example, although node i and node k are mixed node, but, because FA exists, so do not need to set up the delivery port of FA needs, client layer can directly send to downstream node with the first signaling message hop-by-hop, until tail node receives the first signaling message, configuration transmits the crossing on the same level success, and organizes the second signaling message by tail node, and hop-by-hop sends to upstream node, until first node receives the second signaling message, configuration transmits the crossing on the same level success, and so, client layer LSP sets up and finishes.
Obviously, set up in the situation that the protection recovery capability of the link that LSP will use meets the demands at client layer, if recovering type, the link protection that client layer LSP requires is respectively special-purpose 1+1 protection and (fully) heavy-route, namely wish client layer unprotect recovery capability, service layer has protection and recovers binding ability (existing protection has again recovery capability); So; no matter whether need automatically to set up FA-LSP; all only the link protection recovery capability in client layer the first signaling need to be expressed as protection recovers in conjunction with getting final product; take the Path signaling as example; this moment, the Link Flags value of PROTECTION object was 0x50 (privacy protection and (fully) heavy-route), and LSP Flags value is 0x00 (unprotect).
If recovering type, the link protection that client layer LSP requires is respectively unprotect and (fully) heavy-route, the protection recovery capability that requires simultaneously client layer is the 1+1 bidirectional protective, wish that namely client layer has protective capability, there is recovery capability (combination recovers in client layer protection and service layer) in service layer; So; no matter whether need automatically to set up FA-LSP; all only the link protection recovery capability in client layer the first signaling need to be expressed as protection recovers in conjunction with getting final product; take the Path signaling as example; this moment, the Link Flags value of PROTECTION object was 0x40 ((fully) heavy-route), and LSP Flags value is 0x10 (1+1 bidirectional protective).
The present invention can recover the protection of client layer and service layer arrange in pairs or groups flexibly to satisfy the miscellaneous service scene by the PROTECTION object after expanding, and has enriched protection and has recovered type.
Fig. 7 is the composition structural representation that a kind of LSP of the embodiment of the invention sets up system, and as shown in Figure 7, this system comprises first node 71 and tail node 73, wherein:
Described first node 71, be used for calculating according to management plane request and network topological information the routing information of the required process of LSP to be set up, tissue carries the first signaling message of the link flag information after the expansion, and described the first signaling message hop-by-hop sent to downstream node, until the tail node 73 of LSP receives the first signaling message and configuration transmits the crossing on the same level success; Wherein, the link flag information after the described expansion comprises that link heavy-route type information and link protection recover the type information of combination;
Wherein, comprise link protection and the link-recovery ability information that described LSP wishes in described the first signaling message.
Described tail node 73 is used for tissue the second signaling message and the second signaling message hop-by-hop is sent to upstream node, until the first node 71 of LSP receives the second signaling message and configuration transmits the crossing on the same level success.
Further, described system also comprises:
Intermediate node 72 be used for to receive the upstream node that is adjacent or the signaling message of downstream node, and described signaling message is sent to downstream node or the upstream node that is adjacent; And each intermediate node transmits the crossing on the same level success according to described the second signaling information configuration that receives.
No matter first node, tail node, or intermediate node all can adopt node shown in Figure 8 to form structure, and as shown in Figure 8, described node comprises that link judging unit 81 and FA create judging unit 82; Wherein,
Described link judging unit 81 is used for decision node and whether has the link that satisfies condition, if there is the link that satisfies condition, then node is applied for and the reservation resource at this link, and the first signaling message is sent to the downstream node that is adjacent;
Described FA creates judging unit 82, is used for determining whether and need to setting up FA at node.
Concrete, described FA creates judging unit 82 and specifically is used for:
Whether decision node be mixed node and whether do not have FA, if described node be mixed node and do not have FA, then need to set up FA at described node; Otherwise, need to not set up FA at described node.
Concrete, determine and need to set up FA at this node if FA creates judging unit 82, then described node is hung up client layer the first signaling message, and creates the delivery port that FA needs;
Determine need to not set up FA at this node if FA creates judging unit 82, then described node returns LSP and sets up failure response.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (10)
1. the method for building up of a label switching path LSP is characterized in that, described method comprises:
The first node of LSP calculates the routing information of the required process of LSP to be set up according to management plane request and network topological information;
The routing information tissue that the first node basis of LSP obtains carries the first signaling message of the link flag information after the expansion, and described the first signaling message hop-by-hop sent to downstream node, until the tail node of LSP receives described the first signaling message and configuration transmits the crossing on the same level success; Wherein, the link flag information after the described expansion comprises that link heavy-route type information and link protection recover the type information of combination;
After the tail node of LSP receives that the first signaling message and configuration transmit the crossing on the same level success, organize the second signaling message and the second signaling message hop-by-hop is sent to upstream node, and each upstream node transmits the crossing on the same level success according to described the second signaling information configuration, until the first node of LSP receives the second signaling message and configuration transmits the crossing on the same level success.
2. method according to claim 1 is characterized in that, the first node of described LSP calculates before the routing information of the required process of LSP to be set up according to management plane request and network topological information, and the method also comprises:
By ospf inundation mechanism link protection type information, link heavy-route type information are flooded to the whole network node.
3. method according to claim 1 is characterized in that, described the first signaling message hop-by-hop is sent to before the downstream node, and the method also comprises:
Whether judgement exists the link that satisfies condition with the node that the first signaling message hop-by-hop sends to downstream node, if there is the link that satisfies condition, sends to the downstream node that is adjacent then in described link application and reservation resource, and with the first signaling message; Otherwise, determine whether and need to set up forwarding adjacency FA at described node.
4. method according to claim 3 is characterized in that, described determining whether need to be set up FA at described node, for:
Judge whether described node is whether mixed node exists FA, if described node be mixed node and do not have FA, then need to set up FA at described node; Otherwise, need to not set up FA at described node.
5. method according to claim 4 is characterized in that, described determining whether need to be set up FA at described node, further comprises:
If need to set up FA at described node, then hang up client layer the first signaling message, and create the delivery port that FA needs; If need to not set up FA at described node, then return LSP and set up failure response.
6. the system that sets up of a LSP is characterized in that, described system comprises: first node and tail node; Wherein,
Described first node, be used for calculating according to management plane request and network topology message the PATH of the required process of LSP to be set up, tissue carries the first signaling message of the link flag information after the expansion, and described the first signaling message hop-by-hop sent to downstream node, until the tail node of LSP receives the first signaling message and configuration transmits the crossing on the same level success; Wherein, the link flag information after the described expansion comprises that link heavy-route type information and link protection recover the type information of combination;
Described tail node is used for tissue the second signaling message hop-by-hop and sends upstream node, until the first node of LSP receives the second signaling message and configuration transmits the crossing on the same level success.
7. system according to claim 6 is characterized in that, described system also comprises:
Intermediate node be used for to receive the upstream node that is adjacent or the signaling message of downstream node, and described signaling message is sent to downstream node or the upstream node that is adjacent; And each intermediate node transmits the crossing on the same level success according to described the second signaling information configuration.
8. according to claim 6 or 7 described systems, it is characterized in that, described first node, tail node and intermediate node include the link judging unit and FA creates judging unit; Wherein,
Described link judging unit is used for decision node and whether has the link that satisfies condition, if there is the link that satisfies condition, then node is applied for and the reservation resource at described link, and organizes the first signaling message to send to the downstream node that is adjacent;
Described FA creates judging unit, is used for determining whether and need to setting up FA at node.
9. system according to claim 8, it is characterized in that, described FA creates judging unit and specifically is used for: whether decision node be mixed node and whether have FA, if described node be mixed node and do not have FA, then determine and need to set up FA at described node; Otherwise, determine need to not set up FA at described node.
10. system according to claim 9 is characterized in that, described FA creates judging unit and also is used for: determining need to be when described node be set up FA, and described node is hung up client layer the first signaling message, and creates the delivery port that FA needs; Determine need to not set up FA at described node, described node returns LSP and sets up failure response.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591861A (en) * | 2014-10-20 | 2016-05-18 | 中兴通讯股份有限公司 | Method and device for creating label switch path (LSP) |
| WO2018014274A1 (en) * | 2016-07-21 | 2018-01-25 | 华为技术有限公司 | Method for establishing path, and node |
| WO2018137372A1 (en) * | 2017-01-27 | 2018-08-02 | Huawei Technologies Co., Ltd. | Method and apparatus for path computation |
| WO2018145642A1 (en) * | 2017-02-10 | 2018-08-16 | 中兴通讯股份有限公司 | Method and apparatus for establishing route |
| CN112203172A (en) * | 2020-10-09 | 2021-01-08 | 中国联合网络通信集团有限公司 | Special line opening method and device |
| CN112558504A (en) * | 2019-09-10 | 2021-03-26 | 中国电信股份有限公司 | Method, device and system for forwarding critical path information based on OSPF protocol |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588288A (en) * | 2008-05-19 | 2009-11-25 | 华为技术有限公司 | Configuration method, communication equipment and communication system of link attribute information |
| CN101640632A (en) * | 2008-07-31 | 2010-02-03 | 华为技术有限公司 | Method for protecting tunnel bandwidth and device |
| CN101640637A (en) * | 2009-08-31 | 2010-02-03 | 中兴通讯股份有限公司 | Resource reservation protocol tunnel management method based on flow rate engineering and system thereof |
| CN101997765A (en) * | 2009-08-13 | 2011-03-30 | 中兴通讯股份有限公司 | Method for attribute inheritance of forwarding adjacency (FA) in multilayer network and corresponding multiplayer network |
-
2013
- 2013-01-09 CN CN201310007761.5A patent/CN103067275B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588288A (en) * | 2008-05-19 | 2009-11-25 | 华为技术有限公司 | Configuration method, communication equipment and communication system of link attribute information |
| CN101640632A (en) * | 2008-07-31 | 2010-02-03 | 华为技术有限公司 | Method for protecting tunnel bandwidth and device |
| CN101997765A (en) * | 2009-08-13 | 2011-03-30 | 中兴通讯股份有限公司 | Method for attribute inheritance of forwarding adjacency (FA) in multilayer network and corresponding multiplayer network |
| CN101640637A (en) * | 2009-08-31 | 2010-02-03 | 中兴通讯股份有限公司 | Resource reservation protocol tunnel management method based on flow rate engineering and system thereof |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591861A (en) * | 2014-10-20 | 2016-05-18 | 中兴通讯股份有限公司 | Method and device for creating label switch path (LSP) |
| WO2018014274A1 (en) * | 2016-07-21 | 2018-01-25 | 华为技术有限公司 | Method for establishing path, and node |
| CN108886490A (en) * | 2016-07-21 | 2018-11-23 | 华为技术有限公司 | Establish the method and node in path |
| CN108886490B (en) * | 2016-07-21 | 2020-08-07 | 华为技术有限公司 | Method and node for establishing path |
| CN113162854A (en) * | 2017-01-27 | 2021-07-23 | 华为技术有限公司 | Path calculation method and device |
| WO2018137372A1 (en) * | 2017-01-27 | 2018-08-02 | Huawei Technologies Co., Ltd. | Method and apparatus for path computation |
| US11588725B2 (en) | 2017-01-27 | 2023-02-21 | Huawei Technologies Co., Ltd. | Method and apparatus for path computation |
| CN113162854B (en) * | 2017-01-27 | 2022-11-15 | 华为技术有限公司 | Path calculation method and device |
| US11038792B2 (en) | 2017-01-27 | 2021-06-15 | Huawei Technologies Co., Ltd. | Method and apparatus for path computation |
| WO2018145642A1 (en) * | 2017-02-10 | 2018-08-16 | 中兴通讯股份有限公司 | Method and apparatus for establishing route |
| CN112558504B (en) * | 2019-09-10 | 2021-11-02 | 中国电信股份有限公司 | Method, device and system for forwarding critical path information based on OSPF protocol |
| CN112558504A (en) * | 2019-09-10 | 2021-03-26 | 中国电信股份有限公司 | Method, device and system for forwarding critical path information based on OSPF protocol |
| CN112203172B (en) * | 2020-10-09 | 2022-11-01 | 中国联合网络通信集团有限公司 | Special line opening method and device |
| CN112203172A (en) * | 2020-10-09 | 2021-01-08 | 中国联合网络通信集团有限公司 | Special line opening method and device |
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