CN101588288A - Configuration method, communication equipment and communication system of link attribute information - Google Patents
Configuration method, communication equipment and communication system of link attribute information Download PDFInfo
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- CN101588288A CN101588288A CNA2008100932890A CN200810093289A CN101588288A CN 101588288 A CN101588288 A CN 101588288A CN A2008100932890 A CNA2008100932890 A CN A2008100932890A CN 200810093289 A CN200810093289 A CN 200810093289A CN 101588288 A CN101588288 A CN 101588288A
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Abstract
The embodiment of the invention discloses a configuration method, communication equipment and a communication system of link attribute information, wherein the configuration method comprises the following steps: a node of a second network generates the link attribute information of a transmitted adjacent label switched path according to network topology information of the second network and the transmitted adjacent label switched path; and the node of the second network transmits the link attribute information to a first node and/or a second node of a first network so as to ensure that the first node and the second node in the first network are linked through the transmitted adjacent label switched path. The embodiment of the invention can realize the automatic configuration of the link attribute information without manually inquiring the link attribute information from the second network and configuring the link attribute information onto the nodes of the first network, thereby improving the configuration speed and the efficiency of the link attribute information and avoiding mistakes caused by manually configuring the FA-LSP link attribute information.
Description
Technical field
The present invention relates to the communication technology, especially a kind of collocation method of link attribute information, communication equipment and communication system.
Background technology
Multiprotocol label switching (Multi-Protocol Label Switching TrafficEngineering in the band traffic engineering, hereinafter to be referred as: MPLS-TE) in the network, can pass through signaling protocol, for example: RSVP (the Resource Reservation Protocol with TE of band traffic engineering, hereinafter to be referred as: RSVP-TE), automatically set up label switched path (Label Switch Path, hereinafter to be referred as: LSP), user service data is sent to another node from a node.Different user service datas to the LSP parameter require inequality.For example: for voice call (Voice over Internet Protocol, hereinafter to be referred as: VoIP), real time business data such as video, require the time delay of LSP can not be oversize; And for important business data, need to guarantee data transmission quality, then may need to set up two paths shared risk link group (Shared Risk Link Group, hereinafter to be referred as: the SRLG) LSP of Fen Liing, for same business provides data transport service,, pass through SRLG because the probability that the LSP of two separation breaks down simultaneously is less, can when breaking down, the network somewhere effectively ensure the safe transmission of user service data.
SRLG is meant the link of sharing some physical resource in the optical-fiber network, and for example: share physical resources such as physical node, optical cable, in case this sharing means that shared resource breaks down, these links will break down simultaneously.For example: have K bar optical fiber link all to pass through same seat bridge, K is the integer greater than 1, and then this K bar optical fiber link is affected at the bridge Shi Douhui that broken.
In multilayer or multiple-domain network, client's side network can ask to serve the connection that the side network provides service side network, can form adjacency between client's side network two-end-point by this connection.Client's side network endpoint use general MPLS RSVP-TE (Generalized RSVP-TE, hereinafter to be referred as: GMPLSRSVP-TE) the request connection of setting up be called forwarding adjacency LSP (Forwarding Adjacency LSP, hereinafter to be referred as: FA-LSP).
After FA-LSP sets up and finishes, when in client's side network, setting up LSP, this FA-LSP can be used as a link between two adjacent nodes in client's side network, calculate a LSP who satisfies certain constraints according to link attribute informations such as the time delay of this link, SRLG.But because FA-LSP is the connection that service side network provides, client's side network does not have service side network topological information, therefore can't know the link attribute informations such as time delay, SRLG of this FA-LSP.
In the prior art, after FA-LSP foundation is finished, by link attribute informations such as the time delay of keeper this FA-LSP of artificial enquiry from service side network, SRLG, and human configuration on the first node in two adjacent nodes, is published to this FA-LSP in client's side network as a link of end-node in first node to two adjacent node by this head node in client's side network.If this FA-LSP is two-way, then also need the link attribute information such as time delay, SRLG of human configuration FA-LSP on the end-node of keeper in client's side network, end-node also can be published to this FA-LSP in client's side network as the link of end-node to first node.Owing to need the link attribute information such as time delay, SRLG of keeper's artificial enquiry FA-LSP and be configured on the node in client's side network, efficient is lower, and speed is slower, and easily the people for makeing mistakes.
Summary of the invention
Embodiment of the invention technical problem to be solved is: in multilayer or multiple-domain network, after FA-LSP in one of them network sets up and finishes, can send the link attribute information of this FA-LSP from the node in other network of trend, thereby improve the configuration speed and the efficient of link attribute information, and avoid artificially disposing the mistake that the link attribute information of FA-LSP causes.
An aspect of the embodiment of the invention, the collocation method of a kind of link attribute information that provides comprises:
Node in second network generates the link attribute information of described forwarding adjacency label switched path according to this second network of network topology information and forwarding adjacency label switched path;
Node in described second network sends to first node and/or Section Point in first network with described link attribute information, makes first node and Section Point in described first network carry out adjacency by described forwarding adjacency label switched path.
Another aspect of the embodiment of the invention, a kind of communication equipment that provides is positioned at first network, comprising:
Receiver module is used for receiving the link attribute information of the forwarding adjacency label switched path that the node of second network sends, and according to described link attribute information, another communication equipment foundation in described communication equipment and described first network is in abutting connection with switching path.
Another aspect of the embodiment of the invention, the another kind of communication equipment that provides is positioned at second network, comprising:
Information generating module is used for generating the link attribute information of described forwarding adjacency label switched path according to forwarding adjacency label switched path and the described second network of network topology information of storing in advance;
Information sending module, the link attribute information that is used for sending to the first node of first network and/or Section Point the forwarding adjacency label switched path that described information generating module generates makes first node and Section Point in described first network carry out adjacency by described forwarding adjacency label switched path.
Another aspect of the embodiment of the invention, a kind of communication system that provides comprises first communication equipment in first network and the second communication equipment in second network;
Described second communication equipment generates the link attribute information of described forwarding adjacency label switched path according to this second network of network topology information and forwarding adjacency label switched path;
Described second communication equipment sends to described first communication equipment or third communication equipment with described link attribute information; According to described link attribute information, described first communication equipment and third communication equipment are by described forwarding adjacency label switched path adjacency.
In the embodiment of the invention, node in second network is after FA-LSP foundation is finished, can be according to this second network of network topology information and FA-LSP information, generate the link attribute information of FA-LSP, and initiatively send to first node or Section Point in first network, realized the automatic configuration of link attribute information, do not need artificial from second network inquiry link attribute information and being configured on the node in first network, thereby improved the configuration speed and the efficient of link attribute information, and the mistake of having avoided the link attribute information of artificial configuration FA-LSP to cause.
Below by drawings and Examples, the technical scheme of the embodiment of the invention is described in further detail.
Description of drawings
Fig. 1 is the flow chart of an embodiment of collocation method of link attribute information of the present invention.
Fig. 2 is the flow chart of another embodiment of collocation method of link attribute information of the present invention.
Fig. 3 is a kind of application scenarios networking structure schematic diagram of the embodiment of the invention.
Fig. 4 is the flow chart of an Application Example of the collocation method of link attribute information of the present invention.
Fig. 5 is the flow chart of the Another application embodiment of the collocation method of link attribute information of the present invention.
Fig. 6 is the another kind of application scenarios networking structure schematic diagram of the embodiment of the invention.
Fig. 7 is the structural representation of communication equipment embodiment one of the present invention.
Fig. 8 is the structural representation of communication equipment embodiment two of the present invention.
Fig. 9 is the structural representation of communication equipment embodiment three of the present invention.
Figure 10 is the structural representation of communication equipment embodiment four of the present invention.
Embodiment
In the embodiment of the invention, node in second network is after FA-LSP foundation is finished, according to this second network of network topology information and FA-LSP information, generate the link attribute information of FA-LSP, and initiatively the link attribute information of this FA-LSP is sent to first node or Section Point in first network.Make first node and Section Point in first network carry out adjacency by this FA-LSP.
Wherein, first node is also referred to as first node, and Section Point is also referred to as end-node.First network and second network are two heterogeneous networks in multilayer or the multiple-domain network.When two nodes in first network directly do not have direct link to link to each other, the connection that provides by second network links to each other, second network can provide connection for any two nodes in first network, and two nodes in first network can form adjacency by this connection between two nodes of this first network.First network such as client's side network, second network is as service survey grid network.The link attribute information of FA-LSP specifically can comprise one or more in the information of all expression link attributes such as the time delay, SRLG information of link.
Node in second network is after FA-LSP foundation is finished, can be according to this second network of network topology information and FA-LSP, generate the link attribute information of FA-LSP, and initiatively send to first node or Section Point in first network, realized the automatic configuration of link attribute information, do not need artificial from second network inquiry link attribute information and being configured on the node in first network, thereby improved the configuration speed and the efficient of link attribute information, and the mistake of having avoided the link attribute information of artificial configuration FA-LSP to cause.
As shown in Figure 1, be the flow chart of the embodiment of collocation method of link attribute information of the present invention, it may further comprise the steps:
Particularly, the first node in first network can be carried on the ingress that sends in path request (Path) message in second network with the request of obtaining.
Particularly, the ingress that first node can receive in second network is replied (Reservation by notice (notify) message or path, hereinafter to be referred as: the Resv) link attribute information of the FA-LSP of message bearing, from notify message or Resv message, parse the link attribute information of FA-LSP, perhaps, the egress that receives in second network passes through the link attribute information of the FA-LSP of notify message bearing, and parses the link attribute information of FA-LSP in the notify message.
For two-way FA-LSP, the end-node in the first network also egress in second network sends the request of obtaining of the link attribute information be used to obtain FA-LSP, and receives the link attribute information of the FA-LSP that ingress in second network or egress return.Particularly, end-node in first network can send the request of obtaining by the egress of Resv message in second network, and receive ingress in second network by notify message, or the link attribute information of the FA-LSP that returns by notify message or Resv message of egress.In following examples of the present invention, the link attribute information that the request of obtaining that also will be used to obtain the link attribute information of FA-LSP is called FA-LSP obtains request.
As shown in Figure 2, be the flow chart of another embodiment of collocation method of link attribute information of the present invention, it may further comprise the steps:
Particularly, the ingress in second network can receive the Path message that the first node in first network sends, and the link attribute information that parses FA-LSP from this Path message obtains request.
Particularly, ingress can be according to second network of network topology information and the FA-LSP, generates notify message or Resv message, and the link attribute information of FA-LSP is carried on this notify message or Resv message sends to first node.
Accordingly, for two-way FA-LSP, the link attribute information that the egress in second network also receives the FA-LSP of the end-node transmission in first network obtains request, and the end-node in first network sends the link attribute information of FA-LSP.Particularly, the link attribute information of end-node by the FA-LSP of Resv message bearing that egress in second network can receive in first network obtains request, from Resv message, parse this and obtain request, and the link attribute information of the FA-LSP that generates is carried on notify message or Resv message sends to end-node in first network.
As shown in Figure 3, be a kind of application scenarios networking structure schematic diagram of the embodiment of the invention, this embodiment comprises client's side network 1 and service side network 2.Wherein, client's side network 1 can be used as first network of the embodiment of the invention, and service side network 2 can be used as second network of the embodiment of the invention.Client's side network 1 is made of with client's side the 3rd node 13 client's side first node 11, client's side Section Point 12.Service side network 2 is made of with service side the 3rd node 23 service side first node 21, service side Section Point 22.All be provided with interface on each node, the interface on client's side first node 11 is K and A, and the interface on client's side Section Point 12 is B and N, and the interface on client's side the 3rd node 13 is L and M; Interface on the service side first node 21 is C, G and E; Interface on the service side Section Point 22 is F, J and D, and the interface on service side the 3rd node 23 is H and I.Can the interface between two nodes be coupled together by link.In one embodiment of the invention, in client's side network 1, client's side first node 11 and client's side the 3rd node 13, and between client's side Section Point 12 and client's side the 3rd node 13, all there is direct link to link to each other, the FA-LSP adjacency that provides by service side network 2 between client's side first node 11 and the client's side Section Point 12.
Each network can move Routing Protocol, for example: the ospf of band traffic engineering (Open the Shortest Path First with TE, hereinafter to be referred as: OSPF-TE) agreement, come publisher node and link information.In this way, each node in the network can obtain the link information of all nodes in each automatic network.For example: client's side first node 11 can be issued a link information to client's side Section Point 12 by Routing Protocol, and this end interface of link is K, and remote interface is L, and information such as total bandwidth, remaining bandwidth; Service side first node 21 can be issued a link information to service side Section Point 22 by Routing Protocol, and this end interface of link is E, and remote interface is F, and length is n rice, and SRLG information is (1,2).
Client's side first node 11 can be by continuous signaling pattern or nested/splicing signaling mode foundation with the FA-LSP between client's side Section Point 12.FA-LSP can be calculated by service side ingress in the path of service side, for example: calculate by service side first node 21, also can calculate, suppose that the service side path that calculates is service side first node 21 → service side the 3rd node 23 → service side Section Point 22 by centralized path computation service device in the service side ingress request network.If adopt the continuous signaling pattern, then only there is a LSP between client's side first node 11 and the client's side Section Point 12, promptly above-mentioned FA-LSP, the path is A → C → G → H → I → J → D → B.Nested as if adopting/the splicing signaling mode, the tunnel that then can set up service side first node 21 → service side Section Point 22 earlier carries FA-LSP, after tunnel foundation is finished, continues to set up FA-LSP again.At this moment, have two LSP between client's side first node 11 and the client's side Section Point 12: one is FA-LSP, and the path is A → C → tunnel → D → B, and another is the tunnel LSP that belongs to service side network 2 fully, and the path is G → H → I → J.Ingress in the service side network obtains serving after the path of side, just just can set up being connected between client's side first node 11 and the client's side Section Point 12 according to this path.
Respectively with client's side first node 11 and client's side Section Point 12 as first, end-node, with service side first node 21 with serve side Section Point 22 as go into, egress.Suppose that FA-LSP is service side first node 21 (G) → service side the 3rd node 23 (H) → service side the 3rd node 23 (I) → service side Section Point 22 (J) in the path of service side.To set up two-way FA-LSP by the continuous signaling pattern is example, the flow chart of an Application Example of the collocation method of link attribute information of the present invention as shown in Figure 4, it may further comprise the steps:
Step 301, client's side first node 11 sends Path message to service side first node 21, request is established to the connection of client's side Section Point 12, this Path message bearing the link attribute information of FA-LSP obtain request, the link attribute information of acquisition request FA-LSP.
Particularly, RSVP (Resource ReservationProtocol with TE that can the expansion bands traffic engineering, hereinafter to be referred as the notice request RSVP-TE) (Notify Request) object, be used in reference to and be shown in indication in the signaling message (for example: Path message, Resv message, Notify message) and return link attribute informations such as the time delay of FA-LSP, SRLG.Can be respectively at Internet protocol (InternetProtocol, hereinafter to be referred as: IP) the 4th edition (hereinafter to be referred as: IPv4) with sixth version (hereinafter to be referred as: increase an attribute field in Notify Request object IPv6), return SRLG information by the S flag bit setting in the attribute field, by the T flag bit in the attribute field return time delay information is set, in addition, can also be provided with other flag bit in the attribute field, be used to return other link attribute information.Further, can also in attribute field, be provided for carrying out the F flag bit of fault notification.Can set in advance, be 1 o'clock at flag bit, need return the node that relevant parameter information is given the address field appointment in the Notify Request object.
With shown in the table 2, be respectively a concrete form example of the Notify Request object after the expansion among the IPv4 as following table 1.
The form of table 1IPv4 Notify Request object
The form of table 2IPv6 Notify Request object
Step 302, after service side first node 21 receives Path message, the link attribute information that parses FA-LSP from Path message obtains request, fill in route display object (Explicit Route Object according to the service side path that service side first node 21 or path computation service device calculate, hereinafter to be referred as: ERO): { service side first node 21, service side the 3rd node 23, service side Section Point 22}, and fill in and write down routing object (Record Route Object, hereinafter to be referred as: RRO), the link index that to serve side first node 21 (G) writes RRO, this ERO and RRO is write send to service side the 3rd node 23 in the Path message then.Path message will transmit to downstream node along the route of appointment until outlet client side Section Point 22.In this step, service side first node 21 can remove Notify Request object.
Step 303 after service side the 3rd node 23 receives Path message, connects according to ERO, and the link index that will serve side the 3rd node 23 (I) writes RRO, treated Path message is sent to serve side Section Point 22 then.
Step 304, after service side Section Point 22 receives Path message, from RRO, obtain the routing information of the FA-LSP of record, also promptly: FA-LSP, the process of the routing information of the FA-LSP of record also promptly generates the process of FA-LSP, because the routing information in the heterogeneous networks needs to maintain secrecy mutually, from Path message, remove the service side path information among the RRO, then Path message is sent to client's side Section Point 12.
Step 305 after client's side Section Point 12 receives Path message, is returned Resv message to service side Section Point 22, this Resv message bearing the link attribute information of FA-LSP obtain request, the link attribute information of acquisition request FA-LSP.
Step 306 after service side Section Point 22 receives Resv message, is filled in RRO, and this RRO write sends to service side the 3rd node 23 in the Resv message; In addition,, generate the link attribute informations such as time delay, SRLG of FA-LSP, and this link attribute information is carried on sends to client's side Section Point 12 in the Notify message according to the FA-LSP of record and the network topological information of service side network 2 of storage in advance.Client's side Section Point 12 can be stored this link attribute information, uses in order to follow-up selection LSP.Service side first node 21 can remove Notify Request object in this step.
Particularly, can increase a forwarding adjacency parameter (Forwarding Adjacency Parameter, hereinafter to be referred as: object FA Parameter) is used for indication and passes through link attribute informations such as the time delay of signaling message (for example: Path message, Resv message, Notify message) carrying FA-LSP, SRLG.With shown in the table 4, be respectively a concrete form example of time delay FA Parameter object and SRLGFA Parameter object as following table 3.
The form of the anti-elephant of table 3 time delay FA Paramete
The form of table 4SRLG FA Parameter object
Step 307 after service side the 3rd node 23 receives Resv message, is filled in RRO, and this RRO write sends to service side first node 21 in the Resv message.
Step 308 after service side first node 21 receives Resv message, because the routing information in the heterogeneous networks needs to maintain secrecy mutually, is removed the service side path information among the RRO from Resv message, then Resv message is sent to client's side first node 11; In addition, service side first node 21 is also according to the network topological information of the FA-LSP of record with the service side network of storing in advance 2, generate the link attribute informations such as time delay, SRLG of FA-LSP, and this link attribute information is carried on sends to client's side first node 11 in the Notify message.Client's side first node 11 can parse this link attribute information and storage from Notify message, use in order to follow-up selection LSP.
In addition, service side first node 21 also can be with according to the FA-LSP of record and the network topological information of the service side network 2 of storage in advance, generate the time delay of FA-LSP, link attribute information such as SRLG and being carried on is removed in the Resv message behind the RRO, by the time delay of Resv message with FA-LSP, link attribute informations such as SRLG send to client's side first node 11, from Resv message, parse the time delay of FA-LSP by client's side first node 11, link attribute informations such as SRLG, and waiting link attribute information and sending to client's side first node 11 by Notify message bearing FA-LSP separately not.
In step 306 and the step 308, service side first node 21 and service side Section Point 22 can adopt following method specifically to generate the link attribute informations such as time delay, SRLG of FA-LSP: if each node comprises the length or the link attribute informations such as time delay, SRLG of respective link in the service side network 2 in the link information of issue, the link attribute information that comprises in the link information that the network topological information of then serving side first node 21 and service side Section Point 22 service side networks 2 and each node are issued comes the link attribute informations such as time delay, SRLG of calculation services side path; If each node does not comprise the link attribute information of respective link in the service side network 2 when the issue link information, then serving side first node 21 can use signaling to collect the link attribute information of every link in the service side path with service side Section Point 22, for example: when using RRO record service side gusset interface message, to also be recorded among the RRO with length or the link attribute informations such as time delay, SRLG of this interface, so just can obtain serving the link attribute information such as time delay, SRLG in side whole piece path as the index respective links.
If service side network 2 breaks down, for example: the link between service side the 3rd node 23 and the service side Section Point 22 has broken, and then serves first node client side first node 11 these FA-LSP faults that side the 3rd node 23 or service side Section Point 22 can use signaling FA-LSP.Client's side first node 11 is initiated signaling procedures to service side first node 21 again, that is: execution in step 301, and this FA-LSP of heavy-route can use the resource of original FA-LSP as far as possible in the process of heavy-route.After service side first node 21 is received this Path message, recomputate the service side path,, and use RRO object record new route information according to this FA-LSP of service side new route heavy-route that recalculates.After heavy-route is finished, utilize the Notify message informing again as client's side first node 11 of FA-LSP two end nodes and the link attribute information of client's side Section Point 12 these new FA-LSP.After client's side first node 11 receives the link attribute information of this new FA-LSP with client's side Section Point 12, can delete the link attribute information of the FA-LSP that link failure occurs.
In the embodiment shown in fig. 4, by the link attribute information of notifying as the service side first node 21 of serving side network 2 ingress as client's side first node 11 these FA-LSP of the first node of FA-LSP, by the link attribute information of notifying as client's side Section Point 12 these FA-LSP of FA-LSP end-node as the service side Section Point 22 of service side network 2 egress.In addition, also can be by other the arbitrary node in the service side network 2, for example: service side first node 21, obtain the address of client's side first node 11 in the NotifyRequest object from the Path message that receives, obtain the address of client's side Section Point 12 in the NotifyRequest object from the Resv message of receiving, by the link attribute information of head, this FA-LSP of end-node of this other arbitrary node notice FA-LSP or new link attribute information.Perhaps, by other the arbitrary node in the network 2, for example: service side Section Point 22, the address that obtains client's side first node 11 in the Notify Request object from the Path message that receives, the address that obtains client's side Section Point 12 in the Notify Request object from the Resv message of receiving is by the link attribute information of head, this FA-LSP of end-node of this other arbitrary node notice FA-LSP or new link attribute information.
With nested/to set up two-way FA-LSP be example to the splicing signaling mode, the flow chart of the Another application embodiment of the collocation method of link attribute information of the present invention as shown in Figure 5, it may further comprise the steps:
Step 401, client's side first node 11 sends Path message to service side first node 21, request is established to the connection of client's side Section Point 12, this Path message bearing the link attribute information of FA-LSP obtain request, the link attribute information of acquisition request FA-LSP.
Step 402, after service side first node 21 receives Path message, the link attribute information that parses FA-LSP from Path message obtains request, fill in ERO:{ service side first node 21 according to the service side path that service side first node 21 or path computation service device calculate, service side the 3rd node 23, service side Section Point 22}, and use RRO to write down tunnel path information, the link index that to serve side first node 21 (G) writes RRO, then this ERO and RRO are write and send to service side the 3rd node 23 in the Path message, service side tunnel is set up in request.Path message will transmit to downstream node along the route of appointment until outlet client side Section Point 22.
Step 403 after service side the 3rd node 23 receives Path message, connects according to ERO, and the link index that will serve side the 3rd node 23 (I) writes RRO, treated Path message is sent to serve side Section Point 22 then.
Step 404, after service side Section Point 22 received Path message, the link index that will serve side Section Point 22 (J) write RRO, RRO is write to return to after the Resv message serve side the 3rd node 23.
Step 405 after service side the 3rd node 23 receives Resv message, is used RRO record tunnel path information, sends to service side first node 21 then in the Resv message.
Step 406, after service side first node 21 receives Resv message, set up the tunnel of service side first node 21 according to the tunnel path information of record, send Path message to service side Section Point 22, service side first node 21 → service side Section Point 22 tunnels of consulting service recorder with service side Section Point 22 carry FA-LSP.
Step 407 after service side Section Point 22 receives Path message, is transmitted Path message to client's side Section Point 12, and is set up the FA-LSP of client's side first node 11 to client's side Section Point 12.
Step 408 after client's side Section Point 12 receives Path message, is returned Resv message to service side Section Point 22, this Resv message bearing the link attribute information of FA-LSP obtain request, the link attribute information of acquisition request FA-LSP.
Step 409, after service side Section Point 22 receives Resv message, the link attribute information that parses FA-LSP from Resv message obtains request, according to the routing information in tunnel and the network topological information of service side network 2, generate the link attribute informations such as time delay, SRLG of FA-LSP, and this link attribute information is carried on sends to client's side Section Point 12 in the Notify message.Client's side Section Point 12 can be stored this link attribute information, uses in order to follow-up selection LSP; In addition, service side Section Point 22 sends Resv message to service side the 3rd node 23, consults to use service side Section Point 22 → service side first node 21 tunnels carrying FA-LSP with service side first node 21.
Step 410 after service side first node 21 receives Resv message, is given client's side first node 11 with this Resv forwards; In addition, service side first node 21 is also according to the routing information in tunnel and the network topological information of service side network 2, generate the link attribute informations such as time delay, SRLG of FA-LSP, and this link attribute information is carried on sends to client's side first node 11 in the Notify message.Client's side first node 11 can parse link attribute information and the storage of FA-LSP from Notify message, use in order to follow-up selection LSP.
With embodiment illustrated in fig. 4 similar, service side first node 21 also can be carried on the link attribute information of FA-LSP Resv message and send to client's side first node 11, and does not pass through the link attribute information that waits of Notify message bearing FA-LSP separately.
If service side network 2 breaks down, the link between service side the 3rd node 23 and the service side Section Point 22 has broken, and then serves side the 3rd node 23 or service side Section Point 22 and can use signaling service side first node 21 these fault messages.Service side first node 21 can be initiated signaling procedure, that is: execution in step 402, and the tunnel is re-routed to service side first node 21 (E) → service side Section Point 22 (F).After heavy-route is finished, service side first node 21 or service side Section Point 22 can be searched the relevant FA-LSP that uses this tunnel, and use the Notify message informing as client's side first node 11 of FA-LSP two end nodes and the link attribute information of client's side Section Point 12 these new FA-LSP.After client's side first node 11 receives the link attribute information of this new FA-LSP with client's side Section Point 12, can delete the link attribute information of the FA-LSP that link failure occurs.
Similar with embodiment shown in Figure 4, also can be: service side first node 21, the link attribute information of head, this FA-LSP of end-node of notice FA-LSP or new link attribute information by other the arbitrary node in the service side network 2, for example; Perhaps, by other the arbitrary node in the service side network 2, for example: service side Section Point 22, the link attribute information of head, this FA-LSP of end-node of notice FA-LSP or new link attribute information.
Above-mentioned two head in client's side network 1, end-node can be by a plurality of service side network 2 adjacency, and the FA-LSP between client's side head, the end-node is spliced by a plurality of service sides tunnel, and the foundation in each service side tunnel can be with reference to embodiment shown in Figure 5.As shown in Figure 6, be the another kind of application scenarios networking structure schematic diagram of the embodiment of the invention, this embodiment is an example with two service side networks, and its method is equally applicable to comprise the multilayer/multiple-domain network of any a plurality of service side networks.FA-LSP between client's side first node 11 and the client's side Section Point 12 is through two service side networks, first serves side network 2 provides being connected between service side first node 21 and the service side Section Point 22, and the second service side network 2 provides service side the 4th node 24 and serves being connected between side the 5th node 25.Interface on service side the 4th node 24 is O, S and P; Interface on service side the 5th node 25 is Q, T and R, and the interface on service side the 6th node 26 is U and V.Usually, serve the network topological information that the side network is not known the other side mutually for two.Therefore, have only node in the respective service side network just can obtain the link attribute information such as time delay, SRLG of link in this service side network.Promptly serve the link attribute information that side first node 21 can obtain serving side first node 21 and serve link between the side Section Point 22, service side the 4th node 24 can obtain serving the link attribute information of link between side the 4th node 24 and service side the 5th node 25.The link attribute information both sides of link know between service side Section Point 22 and service side the 4th node 24, can be according to setting in advance, calculate by service side Section Point 22 or service side the 4th node 24, concrete, can set in advance by the bigger node of boundary node sign (ID) and calculate, or calculate by the ingress of network.
In multilayer/multiple-domain network, first node in client's side network can be served the link attribute information that ingress in the side network sends FA-LSP to one of them obtain request, and receives the link attribute information of the FA-LSP that returns along the ingress in first service side network of FA-LSP direction or the egress in last service side network; Perhaps, first node receives the link attribute information of respectively serving path in the side network of respectively serving the formation FA-LSP that ingress in the side network or egress return respectively of FA-LSP process, and obtains the link attribute information of whole FA-LSP according to the link attribute information in path in each service side network.
In networking structure shown in Figure 6, can obtain the link attribute information of this FA-LSP respectively by dual mode as client's side first node 11 of FA-LSP first and last node and client's side Section Point 12: first kind of mode is to be sent the link attribute information of whole piece FA-LSP to client's side first node 11 or client's side Section Point 12 by the node in one of them service side network 2; The second way is, send the link attribute information of different route segments by one of them in client's side first node 11 and client's side Section Point 12 of the node in the difference service side network 2, obtain the link attribute information of whole piece FA-LSP by client's side first node 11 or client's side Section Point 12 according to the link attribute information of each route segment.
According to first kind of mode, service side first node 21 is asked the Path message of splicing each bar tunnel of service side, setting up FA-LSP in being used for of sending to downstream node, address field in the Notify Request object is revised as service side first node 21, and other node transparent transmission Notify Request object in Path message.Like this, in setting up the process of FA-LSP, ingress service side the 4th node 24 in the second service side network 2 can be carried on Notify message with the link attribute information of serving path in the side network 2 and send to service side first node 21 according to the address of appointment in the Notify Request object in the Path message.Like this, service side first node 21 just can have been collected the link attribute information of whole piece FA-LSP.Service side first node 21 can be carried on the link attribute information of whole piece FA-LSP Notify message and send to client's side first node 11.Similarly, service side the 5th node 25 can be asked the Resv message of splicing each bar tunnel of service side, setting up FA-LSP in being used for of upstream sending, address field in the Notify Request object is revised as service side the 5th node 25, and other node transparent transmission Notify Request object in Resv message.Like this, in setting up the process of FA-LSP, ingress service side first node 21 in the first service side network 2, can be according to the address of appointment in the Notify Request object in the Resv message, link attribute information with path in the first service side network 2 is carried on Notify message and sends to service side the 5th node 25.Like this, service side the 5th node 25 just can have been collected the link attribute information of whole piece FA-LSP.Service side the 5th node 25 can be carried on the link attribute information of whole piece FA-LSP Notify message and send to client's side Section Point 12.
According to the second way, service side first node 21 is asked the Path message of splicing each bar tunnel of service side, setting up FA-LSP in being used for of sending to downstream node, do not revise the address field in the Notify Request object, promptly remain client's side first node 11.The ingress of then respectively serving side network 2 is promptly served side first node 21 and service side the 4th node 24 and can be respectively the link attribute information in each section path be sent to client's side first node 11.The link attribute information in 11 pairs of each section paths of client's side first node carries out respective handling just can obtain the link attribute information such as time delay, SRLG of whole piece FA-LSP.Similarly, service side the 5th node 25 is asked the Resv message of splicing each bar tunnel of service side, setting up FA-LSP in being used for of upstream sending, and does not revise the address field in the Notify Request object, promptly remains client's side Section Point 12.The ingress of then respectively serving side network 2 is promptly served side first node 21 and service side the 4th node 24 can send to client's side Section Point 12 with link attribute informations such as the time delay in each section path, SRLG.The link attribute information in 12 pairs of each section paths of client's side Section Point carries out respective handling just can obtain the link attribute information such as time delay, SRLG of whole piece FA-LSP.
After certain section tunnel heavy-route, ingress of each service side network 2 is promptly served side first node 21 and service side the 4th node 24 can be with the interdependent node of link attribute informations such as the time delay in new tunnel after the heavy-route, SRLG by Notify message informing FA-LSP, that is: set up in the signaling message of FA-LSP the node that the address field of carrying in the NotifyRequest object is indicated.If the indicated node of address field that carries in the Notify Request object is a service side first node 21, suppose the tunnel generation heavy-route between service side the 4th node 24 and service side the 5th node 25, then serving side the 4th node 24 can be with link attribute informations such as the time delay in the new tunnel after the heavy-route, SRLG, and the information of using the FA-LSP in this new tunnel sends to service side first node 21, service side first node 21 upgrades link failure information such as the time delay, SRLG of FA-LSP in view of the above, and the first node that sends to FA-LSP is client's side first node 11.If the indicated node of address field that carries in the Notify Request object is client's side first node 11, suppose the tunnel generation heavy-route between service side the 4th node 24 and service side the 5th node 25, then serving side the 4th node 24 can be with link attribute informations such as the new tunnel time delay after the heavy-route, SRLG, and the information of using the FA-LSP in this tunnel sends to client's side first node 11, and client's side first node 11 upgrades link failure information such as the time delay, SRLG of FA-LSP in view of the above.
Client's side first node 11 and client's side Section Point 12 obtain in the aforesaid way of link attribute information of this FA-LSP, all be the link informations such as time delay, SRLG that utilize every section tunnel path of Notify message informing respective nodes by the ingress in the difference service side network 2, in addition, also can set in advance, by other node in the service side network 2, for example: the egress of different service side networks 2, utilize the link attribute informations such as time delay, SRLG of every section tunnel path of Notify message informing respective nodes; In addition, can also serve the first node of the ingress notice FA-LSP in the side network 2, the link attribute information of end-node FA-LSP of egress notice FA-LSP in the different service side network 2 by difference, only need to guarantee that each service side network 2 have only a node to be responsible for notifying link attribute informations such as the time delay of every section tunnel path of respective nodes, SRLG just passable.
Owing to when service side first node 21 calculation services side paths, can obtain complete service side path information, therefore, in the various embodiments described above of the present invention, service side first node 21 also can not use the routing information of RRO record service side, and directly utilizes the service side path information of calculating to obtain the link attribute informations such as time delay, SRLG of FA-LSP.
A kind of communication equipment that the embodiment of the invention provides, be positioned at first network, it comprises receiver module, be used for receiving the node of second network, for example: ingress or egress, the link attribute information of the FA-LSP of transmission is according to this link attribute information, this communication equipment is set up in abutting connection with switching path by this FA-LSP with another communication equipment as end-node in first network as first node.
As shown in Figure 7, be the structural representation of communication equipment embodiment one of the present invention, the communication equipment of this embodiment comprises sending module and receiver module.Wherein, sending module is used for according to the link information of storage in advance, and the link attribute information that node in second network sends FA-LSP obtains request, this communication equipment as the end-node in the first node and first network by the FA-LSP adjacency; Receiver module is used for receiving the link attribute information of the FA-LSP that the node of second network returns.
Referring to Fig. 7, above-mentioned communication equipment can also comprise first memory module again, is used to store the link attribute information of link information and FA-LSP; Sending module is according to the link information of storing in first memory module, and the link attribute information that the ingress in second network sends FA-LSP obtains request; Receiver module receives the link attribute information of the FA-LSP that the node in second network returns, and the link attribute information of FA-LSP is stored in first memory module.
In the communication equipment embodiment illustrated in fig. 7, sending module can comprise generation unit and transmitting element.Wherein, the generation unit link attribute information that is used to generate carrying FA-LSP obtains the Path message of request; Transmitting element is used for the link information stored according to first memory module, and the node in second network sends the bearing link attribute information and obtains the Path message of request.As shown in Figure 8, be the structural representation of communication equipment embodiment two of the present invention.
A progressive step ground, in the communication equipment embodiment illustrated in fig. 7, receiver module can comprise receiving element, acquiring unit and storage performance element.Wherein, receiving element is used for receiving Notify message that comprises link attribute information or the Resv message that the node of second network sends; Acquiring unit is used for obtaining link attribute information from Notify message or Resv message; The storage performance element is used for the link attribute information that acquiring unit obtains is stored in first memory module, as shown in Figure 8.
Fig. 7 and communication equipment embodiment illustrated in fig. 8 can be used as the first node in first network, realize as the collocation method embodiment of the above-mentioned link attribute information of the present invention and the corresponding function as shown in the Application Example thereof, as the function of client's side first node 11.In addition, the end-node of this communication equipment in also can first network realizes the corresponding function as end-node in the collocation method embodiment of the above-mentioned link attribute information of the present invention or its Application Example, as the function of client's side Section Point 12.
The communication equipment that another embodiment of the present invention provides is positioned at second network, and it comprises:
Information generating module is used for generating the link attribute information of transmitting FA-LSP according to transmitting FA-LSP and the second network of network topology information of storing in advance, and first node in first network and end-node are transmitted the FA-LSP adjacency by this;
Information sending module is used for making first node and end-node in first network pass through this FA-LSP adjacency to the first node of first network and/or the link attribute information of the end-node transmission forwarding FA-LSP that information generating module generated.
As shown in Figure 9, be the structural representation of communication equipment embodiment three of the present invention, the communication equipment of this embodiment comprises information receiving module, information generating module and information sending module.Wherein, information receiving module is used for receiving the first node of first network or the link attribute information of the FA-LSP that end-node sends obtains request; Information generating module is used for generating the link attribute information of FA-LSP according to the FA-LSP and the second network of network topology information at canned data generation module place in advance, and first node in first network and end-node are by the FA-LSP adjacency; Information sending module is used to send the link attribute information of the FA-LSP that information generating module generates.
Referring to Fig. 9, above-mentioned communication equipment can also comprise second memory module and/or routing information generation module again.Wherein, second memory module is used to store the second network of network topology information; The routing information generation module is used to generate FA-LSP; The FA-LSP that information generating module generates according to the routing information generation module with the second network of network topology information of storing in second memory module, generates the link attribute information of FA-LSP.
In addition, in the communication equipment embodiment illustrated in fig. 9, information receiving module can comprise information receiving unit and information acquisition unit.Wherein, information receiving unit is used to receive Path message, this Path message bearing the link attribute information of FA-LSP obtain request; The link attribute information that information acquisition unit is used for parsing from Path message FA-LSP obtains request, and Path message is sent to the routing information generation module; The routing information generation module generates FA-LSP according to Path message.As shown in figure 10, be the structural representation of communication equipment embodiment four of the present invention.
Further, in the communication equipment embodiment illustrated in fig. 9, information sending module can comprise information generating unit and information transmitting unit.Wherein, information generating unit is used to generate Notify message or Resv message, Notify message or Resv message bearing the link attribute information of the FA-LSP that generates by information generating module; Information transmitting unit is used to send the Notify message or the Resv message of the link attribute information that has carried FA-LSP, as shown in figure 10.
Fig. 9 and communication equipment embodiment illustrated in fig. 10 can be used as the ingress in second network, realize as the collocation method embodiment of the above-mentioned link attribute information of the present invention or the corresponding function as shown in its Application Example, as the function of service side first node 21.In addition, this communication equipment also can be used as the egress in second network, realize as the collocation method embodiment of the above-mentioned link attribute information of the present invention or its Application Example in the corresponding function of egress, as serving the function of side Section Point 22.
A kind of communication system that the embodiment of the invention provides comprises first communication equipment that is arranged in first network and the second communication equipment that is arranged in second network.Second communication equipment generates the link attribute information of FA-LSP according to this second network of network topology information and FA-LSP; Second communication equipment sends to first communication equipment or third communication equipment with the link attribute information of FA-LSP; According to described link attribute information, first communication apparatus and third communication equipment are by the FA-LSP adjacency.
Wherein, first communication equipment can be used as first node or the end-node in first network, that is: client's side first node 11 or client's side Section Point 12, adopt communication equipment as Fig. 7 or arbitrary embodiment shown in Figure 8, among the collocation method embodiment or its Application Example of corresponding realization such as the above-mentioned link attribute information of the present invention, the corresponding function of first node or end-node.Second communication equipment can be used as ingress or the egress in second network, that is: service side first node 21 or service side Section Point 22, adopt communication equipment as Fig. 9 or arbitrary embodiment shown in Figure 10, among the collocation method embodiment or its Application Example of corresponding realization such as the above-mentioned link attribute information of the present invention, the corresponding function of ingress or egress.
Particularly, the information sending module in receiver module in first communication equipment and the second communication equipment is carried out information interaction, receives the link attribute information of the FA-LSP of information sending module transmission.
In addition, the sending module in first communication equipment also with second communication equipment in information receiving module carry out information interaction, send the request of obtaining to information receiving module, this request of obtaining is used to obtain the link attribute information of FA-LSP.
Based on the invention described above embodiment, node in second network is after FA-LSP foundation is finished, can be according to this second network of network topology information and FA-LSP information, generate the link attribute information of FA-LSP, and initiatively send to first node or Section Point in first network, do not need artificial from second network inquiry link attribute information and being configured on the node in first network, realized the automatic configuration of link attribute information, thereby improved the configuration speed and the efficient of link attribute information, and the mistake of having avoided the link attribute information of artificial configuration FA-LSP to cause.
It should be noted last that: above embodiment is only in order to illustrating technical scheme of the present invention, but not the present invention is made restrictive sense.Although the present invention is had been described in detail with reference to above-mentioned preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and this modification or be equal to the spirit and scope that replacement does not break away from technical solution of the present invention.
Claims (18)
1, a kind of collocation method of link attribute information is characterized in that, comprising:
Node in second network generates the link attribute information of described forwarding adjacency label switched path according to this second network of network topology information and forwarding adjacency label switched path;
Node in described second network sends to first node and/or Section Point in first network with described link attribute information, makes first node and Section Point in described first network carry out adjacency by described forwarding adjacency label switched path.
2, method according to claim 1, it is characterized in that, node in described second network generates before the link attribute information of described forwarding adjacency label switched path according to this second network of network topology information and forwarding adjacency label switched path, also comprises:
Node in described second network receives the path request message that the first node in first network sends, and parses the request of obtaining from described path request message, and this request of obtaining is used to obtain the link attribute information of described forwarding adjacency label switched path; Or
Node in described second network receives the path answer message that the Section Point in first network sends, and from described path answer message, parsing the described request of obtaining, this request of obtaining is used to obtain the link attribute information of described forwarding adjacency label switched path.
3, method according to claim 1, it is characterized in that, generate the link attribute information of described forwarding adjacency label switched path and the node in described second network described link attribute information is sent between the first node and/or Section Point in first network, also comprise: the link attribute information of described forwarding adjacency label switched path is carried on notification message or the path is replied in the message;
Node in described second network comprises first node and/or the Section Point that described link attribute information sends in first network: will carry the notification message of described link attribute information or path and reply message and send to first node and/or Section Point in described first network; First node in described first network and/or Section Point parse described link attribute information from notification message or path answer message.
4, according to any described method of claim 1 to 3, it is characterized in that, also comprise:
When the forwarding adjacency label switched path in described second network breaks down, the first node of the node in described second network in first network and/or the link attribute information of the new forwarding adjacency label switched path after the Section Point transmission heavy-route.
5, method according to claim 2 is characterized in that, described second network is a plurality of;
Node in described second network receives the path request message that first node in described first network or Section Point send and is specially: receive the path request message that the first node in described first network sends along the ingress in first second network of described forwarding adjacency label switched path direction; And/or the path answer message that the node in described second network receives the Section Point transmission in first network is specially: receive the path answer message that the Section Point in described first network sends along the egress in last second network of described forwarding adjacency label switched path direction.
6, method according to claim 5 is characterized in that, the node in described second network comprises first node and/or the Section Point that described link attribute information sends in first network:
Ingress in described first second network or the egress in last second network send to first node and/or Section Point in first network with described link attribute information;
Perhaps, described node in second network of label switched path process, respectively will be separately the place, constitute described in each second network of label switched path the link attribute information in path send to first node and/or Section Point in first network;
First node in first network and/or Section Point obtain described link attribute information in abutting connection with label switched path according to the link attribute information in path in each second network.
According to any described method of claim 1 to 3, it is characterized in that 7, described link attribute information is the time delay and/or the shared risk link group information of link.
8, a kind of communication equipment is positioned at first network, it is characterized in that, comprising:
Receiver module is used for receiving the link attribute information of the forwarding adjacency label switched path that the node of second network sends, and according to described link attribute information, another communication equipment foundation in described communication equipment and described first network is in abutting connection with switching path.
9, communication equipment according to claim 8 is characterized in that, also comprises:
Sending module is used for the basis link information of storage in advance, and the node in described second network sends path request message or the path answer message that request is obtained in carrying, the described link attribute information of asking to be used to obtain the forwarding adjacency label switched path that obtains.
10, communication equipment according to claim 9 is characterized in that, also comprises:
First memory module is used to store the link attribute information of link information and forwarding adjacency label switched path;
Described sending module is according to the link information of storing in described first memory module, and the node in described second network sends path request message or the path answer message that request is obtained in carrying;
Described receiver module receives the link attribute information of the described forwarding adjacency label switched path that the node in described second network returns, and the link attribute information of described forwarding adjacency label switched path is stored in described first memory module.
11, a kind of communication equipment is positioned at second network, it is characterized in that, comprising:
Information generating module is used for generating the link attribute information of described forwarding adjacency label switched path according to forwarding adjacency label switched path and the described second network of network topology information of storing in advance;
Information sending module, be used for sending the link attribute information of the forwarding adjacency label switched path that described information generating module generates, make first node and Section Point in described first network carry out adjacency by described forwarding adjacency label switched path to the first node of first network and/or Section Point.
12, communication equipment according to claim 11 is characterized in that, also comprises:
Information receiving module, be used for receiving the first node of described first network or the path request message or the path answer message of Section Point transmission, and from described path request message or path answer message, parsing the request of obtaining, this request of obtaining is used to obtain the link attribute information of described forwarding adjacency label switched path.
13, communication equipment according to claim 12 is characterized in that, also comprises:
Second memory module is used to store the described second network of network topology information; And/or
The routing information generation module is used to generate the forwarding adjacency label switched path;
The described forwarding adjacency label switched path that described information generating module generates according to described routing information generation module, with the described second network of network topology information of storing in described second memory module, generate the link attribute information of described forwarding adjacency label switched path.
14, communication equipment according to claim 13 is characterized in that, described information receiving module comprises:
Information receiving unit is used for the RX path request message;
Information acquisition unit is used for parsing the described request of obtaining from described path request message, and described path request message is sent to described routing information generation module;
Described routing information generation module generates described forwarding adjacency label switched path according to described path request message.
15, according to any described communication equipment of claim 11 to 14, it is characterized in that described information sending module comprises:
Information generating unit, be used to generate notification message or path and reply message, and the link attribute information of described forwarding adjacency label switched path is carried on described notification message or the path is replied in the message, or the link attribute information of described forwarding adjacency label switched path is carried in the path request message that receives;
Information transmitting unit is used to send the notification message or the path of carrying described link attribute information and replys message or path request message.
16, a kind of communication system is characterized in that, comprising: first communication equipment in first network and the second communication equipment in second network;
Described second communication equipment generates the link attribute information of described forwarding adjacency label switched path according to this second network of network topology information and forwarding adjacency label switched path;
Described second communication equipment sends to described first communication equipment or third communication equipment with described link attribute information; According to described link attribute information, described first communication apparatus and third communication equipment are by described forwarding adjacency label switched path adjacency.
17, communication system according to claim 16 is characterized in that, described second communication equipment comprises:
Information generating module is used for generating the link attribute information of described forwarding adjacency label switched path according to forwarding adjacency label switched path and the described second network of network topology information of storing in advance;
Information sending module is used for sending the forwarding adjacency label switched path that described information generating module generates to described first communication equipment or third communication equipment;
Described first communication equipment comprises:
Receiver module is used to receive the link attribute information of the forwarding adjacency label switched path that described information sending module sends.
18, communication system according to claim 17 is characterized in that, described first communication equipment also comprises:
Sending module, be used for the basis link information of storage in advance, send path request message or the path answer message that request is obtained in carrying to described second communication equipment, the described request of obtaining is used for obtaining to described second communication equipment the link attribute information of forwarding adjacency label switched path;
Described second communication equipment also comprises:
Information receiving module is used to receive path request message or the path answer message that described sending module sends, and parses the described request of obtaining from described path request message or path answer message.
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| CN2008100932890A CN101588288B (en) | 2008-05-19 | 2008-05-19 | Configuration method, communication equipment and communication system of link attribute information |
| PCT/CN2009/071110 WO2009140873A1 (en) | 2008-05-19 | 2009-03-31 | Configuration method of link attribute information, communication device and communication system |
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| WO2012055230A1 (en) * | 2010-10-29 | 2012-05-03 | 中兴通讯股份有限公司 | Updating method and system for forwarding adjacency attribute in multi-layer network |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101588288B (en) | 2012-02-22 |
| WO2009140873A1 (en) | 2009-11-26 |
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