CN101478474A

CN101478474A - Method, apparatus and system for cross-domain MPLS TE LSP establishment

Info

Publication number: CN101478474A
Application number: CNA2008101864250A
Authority: CN
Inventors: 刘道军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-12-19
Filing date: 2008-12-19
Publication date: 2009-07-08
Anticipated expiration: 2028-12-19
Also published as: CN101478474B

Abstract

The invention discloses a method for constructing a cross-domain multi-protocol label switching traffic engineering label switched path (MPLS TE LSP), and a device and a system thereof, belonging to the field of network communications. The method comprises the following steps: establishing a first border gateway protocol (BGP) connection with a first autonomous system boundary router (ASBR); receiving an upgrade message forwarded by the first ASBR, and constructing a transmission path to a destination node by using the first BGP connection, a second BGP connection constructing by the first ASBR and a second ASBR, and a first MPLS TE LSP between the first ASBR and the destination node; and determining the data stream of the transmission path according to data stream information. The device comprises a construction module, a receiving module and connection module. The system comprises a first ASBR, a second ASBR, a source node and a destination node. The embodiment of the invention establishes BGP connections between ASBRs in different domains and transmits data stream information, so as to realize construction of the cross-domain LSP by using MPLS TE, which is not disturbed by LSPs in other domains, thereby expanding the application range of MPLS TE.

Description

The cross-domain methods, devices and systems of setting up MPLS TE LSP

Technical field

The present invention relates to network communication field, particularly a kind of cross-domain methods, devices and systems of setting up MPLSTE LSP.

Background technology

MPLS TE (Multi-Protocol Label Switch Traffic Engineering, traffic engineering technology based on multiprotocol label switching) technology combines MPLS (Multi-Protocol Label Switch, multiprotocol label switching) technology and TE (TrafficEngineering, traffic engineering) advantage of technology, can realize the dynamic adjustment of network bandwidth resources and distribute rationally, solve the network congestion problem.MPLS TE technology is carried out topology calculating according to Link State, and creates LSP (Label Switch Path, label switched path).The LSP that creates can carry out dynamic resource reservation according to the situation in bandwidth resources pond, makes the quality of transfer of data obtain certain guarantee.Simultaneously MPLS TE provides perfect protection mechanism, if occur link failure in the network or node failure can realize that switch in the path fast.

In actual applications, when utilizing MPLS TE technology to set up source node, if source node and destination node in a zone, then can be carried out topology according to LSD and calculate with establishment LSP to the LSP of destination node; If in a zone, then the mode that shows paths by setting is not set up cross-domain LSP for source node and destination node.If desired LSP is carried out end to end protection; then need to set up a backup LSP; if and want to realize fast the LSP protection; BFD (Bidirectional Forwarding Detection, the two-way forwarding detects) Session (session) that then also needs to set up based on LSP carries out the detection of Link State.

As shown in Figure 1, when utilizing MPLS TE to set up cross-domain LSP, because source node and destination node are in different zones, therefore can't set up LSP automatically by calculating, the mode that can only show paths by setting, the loose path that a process ASBR (Autonomous System Boundary, Autonomous System Boundary Router, AS Boundary Router) is set is to set up cross-domain LSP.

After prior art was studied, the inventor found:

Utilize MPLS TE to set up in the scheme of cross-domain LSP in prior art, must safeguard a LSP who crosses over zones of different,, also must safeguard the BFD Session of a cross-domain LSP if want to realize LSP protection fast.This scheme is not allowed under some application scenarios, reason is that different zones belongs to different countries or belongs to different operators, can be difficult to administer and maintain if a LSP is established to another zone, this makes the use of MPLS TE be subjected to considerable restraint.

Summary of the invention

In order to make the range of application of expansion MPLS TE, the embodiment of the invention provides the method for a kind of cross-domain MPLS of foundation TE LSP, and described method comprises:

In the local terminal territory, foundation is connected with first Border Gateway Protocol (BGP) of the first Autonomous System Boundary Router, AS Boundary Router ASBR;

Receive the renewal message that a described ASBR transmits, described renewal message utilizes the 2nd BGP that sets up with a described ASBR to be connected by the 2nd ASBR in the territory, opposite end and sends to a described ASBR; The data traffic information that comprises a MPLS TE LSP of described the 2nd ASBR and destination node foundation in the described renewal message;

Utilize that a described BGP connects, described the 2nd BGP connects, and a described MPLS TE LSP, be established to the transmission path of destination node; And determine the data traffic of described transmission path according to the data traffic information of a described MPLS TE LSP.

The embodiment of the invention also provides the device of a kind of cross-domain MPLS of foundation TE LSP, and described device comprises:

First sets up module, is used in the local terminal territory, sets up to be connected with the BGP of an ASBR;

First receiver module is used to receive the renewal message that a described ASBR transmits, and described renewal message utilizes the 2nd BGP that sets up with a described ASBR to be connected by the 2nd ASBR in the territory, opposite end and sends to a described ASBR; The data traffic information that comprises a MPLS TE LSP of described the 2nd ASBR and destination node foundation in the described renewal message;

First link block utilizes described BGP connection, described the 2nd BGP to connect, and a described MPLS TELSP, is established to the transmission path of destination node; And determine the data traffic of described transmission path according to the data traffic information of a described MPLS TE LSP.

The embodiment of the invention also provides the system of a kind of cross-domain MPLS of foundation TE LSP, and described system comprises:

The one ASBR is used for setting up the 2nd BGP with the 2nd ASBR and is connected, and receives the renewal message that described the 2nd ASBR sends, and described renewal message is transmitted to source node;

The 2nd ASBR is used for setting up a MPLS TE LSP with destination node, utilizes described the 2nd BGP to connect and sends described renewal message to a described ASBR, and described renewal message comprises the data traffic information of a described MPLS TE LSP;

Source node is used in the local terminal territory, sets up to be connected with the BGP of a described ASBR; Receive the renewal message that a described ASBR transmits, utilize that a described BGP connects, described the 2nd BGP connects, and a described MPLS TE LSP, be established to the transmission path of destination node; And determine the data traffic of described transmission path according to the data traffic information of a described MPLS TE LSP;

Destination node is used to utilize the described transmission path of setting up with described source node, carries out transfer of data with described source node.

The embodiment of the invention connects and the Data transmission flow information by set up BGP between the ASBR of zones of different, realized utilizing MPLS TE to set up cross-domain LSP, and the cross-domain LSP that sets up manages maintenance by the autonomous system in the territory separately, be not subjected to the interference of other regional LSP, thereby expanded the range of application of MPLSTE.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the schematic diagram of the cross-domain MPLS of foundation TE LSP that provides of prior art;

Fig. 2 is the method flow diagram of the cross-domain MPLS of foundation TE LSP that provides of the embodiment of the invention 1;

Fig. 3 is the method flow diagram of the cross-domain MPLS of foundation TE LSP that provides of the embodiment of the invention 2;

Fig. 4 is the schematic diagram of the cross-domain MPLS of foundation TE LSP that provides of the embodiment of the invention 2;

Fig. 5 is the method flow diagram of the cross-domain foundation backup MPLS TE LSP that provides of the embodiment of the invention 2;

Fig. 6 is the structure drawing of device of the cross-domain MPLS of foundation TE LSP that provides of the embodiment of the invention 3;

Fig. 7 is the system construction drawing of the cross-domain MPLS of foundation TE LSP that provides of the embodiment of the invention 4.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

Embodiment 1

Referring to Fig. 2, the embodiment of the invention provides the method for a kind of cross-domain MPLS of foundation TE LSP.Local terminal territory in the present embodiment comprises: an ASBR and source node, the territory, opposite end comprises: the 2nd ASBR and destination node.This method is specially:

201: in the local terminal territory, set up source node and be connected with first Border Gateway Protocol (BGP) of the first Autonomous System Boundary Router, AS Boundary Router ASBR;

202: source node receives the renewal message that an ASBR transmits, and this renewal message utilizes the 2nd BGP that sets up with an ASBR to be connected by the 2nd ASBR in the territory, opposite end and sends to an ASBR; The data traffic information that comprises a MPLS TE LSP of the 2nd ASBR and destination node foundation in this renewal message;

203: source node utilizes BGP connection, the 2nd BGP to connect, and a MPLS TE LSP, is established to the transmission path of destination node; And determine the data traffic of this transmission path according to the data traffic information of a MPLS TE LSP.

The embodiment of the invention connects and the Data transmission flow information by set up BGP between the ASBR of zones of different, has realized utilizing the cross-domain LSP that sets up source node to destination node of MPLS TE, thereby has expanded the range of application of MPLS TE.

Embodiment 2

Referring to Fig. 3, the embodiment of the invention provides a kind of method of cross-domain MPLS TE LSP establishment.Be illustrated in figure 4 as the scene schematic diagram of the embodiment of the invention, in this scene, local terminal comprises in the territory: an ASBR, source node and the 3rd ASBR, the territory, opposite end comprises: the 2nd ASBR, destination node and the 4th ASBR.In the drawings, line between each node represents that BGP connects or LSP connects, wherein, line between line between line between line between a source node and the ASBR, an ASBR and the 2nd ASBR, source node and the 3rd ASBR, the 3rd ASBR and the 4th ASBR, and the one ASBR represent that with the line between the 3rd ASBR BGP is connected, two nodes having set up the BGP connection come transmission information by sending the renewal message, and detailed process is described in more detail below; The 2nd ASBR among the figure and the line between the purpose node, and the 4th ASBR represents that with the line between the purpose node LSP is connected, it can be that the LSP that two nodes are directly set up connects that the LSP of foundation connects, and also can be to connect by the LSP that indirect equipment is set up.

When in this scene, setting up source node to the cross-domain LSP of destination node, for guaranteeing safety of data transmission, after having set up normal transmission path, also need to set up the transmission path of backup, with transmission direction be: the path of source node-the one ASBR-the 2nd ASBR-destination node is the normal transmission path, with transmission direction is: the path of source node-Di three ASBR-the 4th ASBR-destination node is the backup transmission path.The detailed process of setting up cross-domain LSP is as follows:

301: the BGP (Border Gateway Protocol, Border Gateway Protocol) that sets up an ASBR and the 2nd ASBR connects.

Concrete, can be by setting up bgp neighbor, set up being connected of an ASBR and the 2nd ASBR, make ASBR and the 2nd ASBR bgp neighbor each other of winning, after an ASBR and the 2nd ASBR have set up BGP and have been connected, just can consult, make between an ASBR and the 2nd ASBR and can transmit TE information by the family address (address family) among the MPLS TE.

302: in the local terminal territory, the BGP that sets up a source node and an ASBR is connected.

303: in the territory, opposite end, setting up with the 2nd ASBR is Ingress node, is the one MPLS TELSP between the territory of Egress node with the destination node.

After having set up a MPLS TE LSP, in order to make the 2nd ASBR carry out transfer of data by a MPLS TE LSP and destination node, need be in the MPLS TE family address of the bgp protocol of the 2nd ASBR, use predetermined strategy to introduce a MPLS TE LSP, be a MPLS TE LSP distributing labels, wherein, predetermined strategy can be a LSP label distribution strategy of the prior art.The 2nd ASBR is utilized as a MPLS TE LSP distributed labels, carries out the transmission of data with destination node on a MPLS TE LSP.

304: source node receives the renewal message that an ASBR transmits, and this renewal message is to utilize the BGP that sets up with an ASBR to be connected by the 2nd ASBR to send to an ASBR, and is transmitted to source node by an ASBR.The data traffic information that comprises a MPLS TE LSP in this renewal message.

Concrete, the 2nd ASBR is according to the variation of the data traffic on the MPLS TE LSP, send to upgrade message with the flow of new data transmission more by an ASBR to source node, such as, when the variation of 10M took place the data traffic of a MPLS TE LSP, the 2nd ASBR just sent and upgrades message with announcement local terminal area update data traffic.The form that upgrades message is referring to table 1.

Table 1

Upgrade in the message and can carry multiple information, important information comprises: data traffic information: TE-NLRI bandwidth, protection information: Protection Flag, and quality of service information: QOS etc.The 2nd ASBR can announce a MPLS TE LSP data flow transmitted amount to the local terminal territory by filling in TE-NLRIbandwidth, by Protection Flag is changed to effectively, carries out the backup protection of transfer of data to the announcement of local terminal territory; Invalid by Protection Flag is changed to, announce the backup protection that does not carry out transfer of data to the local terminal territory.Wherein, an ASBR utilizes the BGP that sets up with source node to be connected, and will upgrade message and be transmitted to source node.

305: the BGP that this source node utilizes source node and an ASBR to set up is connected, an ASBR is connected with the BGP that the 2nd ASBR sets up, and a MPLS TE LSP, sets up the normal transmission path that source node arrives destination node; And determine the flow of this transmission path according to the data traffic information in the message upgraded.

Use said method just to set up source node to the normal transmission path between destination node; in order to guarantee reliability of data transmission; also need to set up the backup transmission path; when normal transmission path breaks down; data are switched to backup to be transmitted on the transmission path; referring to Fig. 5, the process that foundation backup transmission path logarithm reportedly is input into the row protection is as follows:

501: the BGP that sets up the 4th ASBR in the 3rd ASBR and the territory, opposite end in the local terminal territory is connected.

502: in the local terminal territory, set up source node and be connected, and the BGP of the 3rd ASBR and an ASBR is connected with the BGP of the 3rd ASBR.

503: in the territory, opposite end, setting up with the 4th ASBR is Ingress node, is the 2nd MPLS TE LSP between the territory of Egress node with the destination node.

After having set up the 2nd MPLS TE LSP, in order to make the 4th ASBR carry out transfer of data by the 2nd MPLS TE LSP and destination node, need be in the MPLS TE family address of the bgp protocol of the 4th ASBR, use predetermined strategy to introduce the 2nd MPLS TE LSP, it is the 2nd MPLS TE LSP distributing labels, wherein, predetermined strategy can be a LSP label distribution strategy of the prior art.The 4th ASBR is utilized as the 2nd MPLS TE LSP distributed labels, carries out the transmission of data with destination node on the 2nd MPLS TE LSP.

504: when the 2nd ASBR detects link occurs fault between an ASBR and the 2nd ASBR by BFD; the 2nd ASBR sends to the 4th ASBR and carries the renewal message of protection information; promptly in the renewal message as shown in table 1 that sends, Protection Flag is changed to effectively, to announce the backup protection that the 4th ASBR carries out transfer of data.

After ASBR received the renewal message that carries protection information in 505: the four, carry out the backup protection of transfer of data, send to source node by the 3rd ASBR and upgrade message, comprise flow information and the protection information of the 2nd MPLS TE LSP in this renewal message.

The 4th ASBR upgrades message and detects Protection Flag when effective receiving; carry out the backup protection of transfer of data; promptly utilize the BGP that sets up with the 3rd ASBR to be connected, comprise the flow information of the 2nd MPLS TE LSP and the renewal message of protection information to the 3rd ASBR transmission.

After the 3rd ASBR receives this renewal message of the 4th ASBR transmission, for can switching on the backup path, the data traffic that makes an ASBR go up transmission transmits, also need to utilize the BGP that sets up with an ASBR to be connected, should upgrade message and send to an ASBR; The one ASBR carries out the backup protection function according to the protection information in this renewal message, will switch on the 2nd ASBR in an ASBR data flow transmitted amount and transmit, and the walking along the street of going forward side by side is by convergence, to realize the switching of transmission path.Then, the 3rd ASBR utilizes the BGP that sets up with source node to be connected, and should upgrade message and be transmitted to source node.

506: source node receives the renewal message that the 3rd ASBR transmits, carry out the backup protection of transfer of data according to protection information in this renewal message, i.e. utilization is connected with the BGP of the 3rd ASBR, the 3rd ASBR is connected with the BGP of the 4th ASBR, and the 2nd MPLS TE LSP, set up the backup transmission path of source node to destination node; And according to the definite flow that backs up transmission path of data traffic information in this renewal message.

The embodiment of the invention connects and the Data transmission flow information by set up BGP between the ASBR of zones of different, realized utilizing MPLS TE to set up cross-domain LSP, and the cross-domain LSP that sets up manages maintenance by the autonomous system in the territory separately, be not subjected to the interference of other regional LSP, thereby expanded the range of application of MPLS TE.

Embodiment 3

Referring to Fig. 6, the embodiment of the invention provides the device of a kind of cross-domain MPLS of foundation TE LSP, and this device comprises:

First sets up module 601, is used in the local terminal territory, sets up to be connected with the BGP of an ASBR;

First receiver module 602 is used to receive the renewal message that an ASBR transmits, and this renewal message utilizes the 2nd BGP that sets up with an ASBR to be connected by the 2nd ASBR in the territory, opposite end and sends to an ASBR; The data traffic information that comprises a MPLS TE LSP of the 2nd ASBR and destination node foundation in this renewal message;

First link block 603 utilizes BGP connection, the 2nd BGP to connect, and a MPLS TE LSP, is established to the transmission path of destination node; And determine the data traffic of this transmission path according to the data traffic information of a MPLS TE LSP.

Wherein, a MPLS TE LSP is: with the 2nd ASBR is Ingress node, is MPLS TE LSP between the territory of Egress node with the destination node.For after having set up a MPLS TE LSP, make the 2nd ASBR connect received data and can be transferred to destination node by a MPLS TE LSP by BGP, need in the 2nd ASBR, use predetermined strategy to introduce a MPLS TE LSP, and be a MPLS TE LSP distributing labels; When the 2nd ASBR receives the data of ASBR transmission, on a MPLS TE LSP, be utilized as a MPLS TE LSP distributed labels, transfer of data is arrived destination node.

For logarithm reportedly is input into the row protection, need to set up the backup transmission path, this moment, this device also comprised:

Second sets up module, is used in the local terminal territory, sets up to be connected with the 3rd BGP of the 3rd ASBR;

Second receiver module is used to receive the renewal message that the 3rd ASBR transmits, and this renewal message utilizes the 4th BGP that sets up with the 3rd ASBR to be connected by the 4th ASBR in the territory, opposite end and sends to the 3rd ASBR; The data traffic information and the protection information that comprise the 2nd MPLS TE LSP of the 4th ASBR and destination node foundation in this renewal message;

Second link block is used for the protection information according to this renewal message, utilizes the 3rd BGP connection, the 4th BGP to connect, and the 2nd MPLS TE LSP, is established to the backup transmission path of destination node; And determine the data traffic of this backup transmission path according to the data traffic information of the 2nd MPLS TELSP.

Wherein, the 2nd MPLSTE LSP is: with the 4th ASBR is Ingress node, is MPLS TE LSP between the territory of Egress node with the destination node.For after having set up the 2nd MPLSTE LSP, make the 4th ASBR connect received data and can be transferred to destination node by the 3rd MPLS TE LSP by BGP, need in the 4th ASBR, use predetermined strategy to introduce the 2nd MPLS TE LSP, and be the 2nd MPLS TE LSP distributing labels; When the 4th ASBR receives the data of the 3rd ASBR transmission, on the 2nd MPLS TE LSP, be utilized as the 2nd MPLS TE LSP distributed labels, transfer of data is arrived destination node.

In embodiments of the present invention, a BGP connects, the 2nd BGP connects, the 3rd BGP connects and is connected with the 4th BGP, comprising: utilize the connection of the bgp neighbor of bgp protocol foundation, this bgp neighbor is consulted the Data transmission flow information by MPLS TE.

Embodiment 4

The embodiment of the invention provides the system of a kind of cross-domain MPLS of foundation TE LSP.Referring to Fig. 7, this system comprises: an ASBR701, the 2nd ASBR702, source node 703 and purpose node 704.This system utilizes MPLS TE to set up cross-domain LSP transmission path, and transmission direction is: source node-the one ASBR-the 2nd ASBR-destination node.

This system is after having set up normal transmission path, for guaranteeing safety of data transmission, also need to set up the transmission path of backup, this moment, this system also comprised: the 3rd ASBR705 and the 4th ASBR706, the transmission direction of the backup transmission path of foundation is: source node-Di three ASBR-the 4th ASBR-destination node.

In Fig. 7, line between each node represents that BGP connects or LSP connects, wherein, line between line between line between line between a source node and the ASBR, an ASBR and the 2nd ASBR, source node and the 3rd ASBR, the 3rd ASBR and the 4th ASBR, and the one ASBR represent that with the line between the 3rd ASBR BGP is connected, two nodes having set up the BGP connection come transmission information by sending the renewal message, and detailed process is described in more detail below; The 2nd ASBR among the figure and the line between the purpose node, and the 4th ASBR represents that with the line between the purpose node LSP is connected, it can be that the LSP that two nodes are directly set up connects that the LSP of foundation connects, and also can be to connect by the LSP that indirect equipment is set up.

Concrete, in this system:

The one ASBR701 is used for setting up the 2nd BGP with the 2nd ASBR702 and is connected, and receives the renewal message that the 2nd ASBR702 sends, and should upgrade message and be transmitted to source node 703;

The 2nd ASBR702, be used for setting up a MPLS TE LSP with destination node 704, and detect the data traffic of a MPLS TELSP, and utilizing the 2nd BGP to connect and send this renewal message to an ASBR701, this renewal message comprises the data traffic information of a MPLS TE LSP;

Source node 703 is used in the local terminal territory, sets up to be connected with the BGP of an ASBR701; Receive the renewal message that an ASBR701 transmits, utilize that a BGP connects, the 2nd BGP connects, and a MPLS TELSP, be established to the transmission path of destination node 703; And determine the data traffic of this transmission path according to the data traffic information of a MPLS TE LSP;

Destination node 704 is used to utilize this transmission path of setting up with this source node 703, carries out transfer of data with this source node 703.

When needs were set up the backup transmission path, this system also comprised the 3rd ASBR705 and the 4th ASBR706, wherein:

The 3rd ASBR705 is used for setting up the 4th BGP with the 4th ASBR706 and is connected, and receives the renewal message that the 4th ASBR406 sends, and should upgrade message and be transmitted to source node 703;

The 4th ASBR706; be used for setting up the 2nd MPLS TE LSP with destination node 704; and detect the data traffic of the 2nd MPLS TELSP; utilize the 4th BGP to connect and send this renewal message to the 3rd ASBR705; this renewal message comprises the data traffic information of protection information and the 2nd MPLS TE LSP

When carrying out the backup protection of transfer of data, source node 703 also is used in the local terminal territory, sets up to be connected with the 3rd BGP of the 3rd ASBR705; Receive the renewal message that the 3rd ASBR705 transmits, upgrade protection information in message, utilize that the 3rd BGP connects, the 4th BGP connects, and the 2nd MPLS TE LSP, be established to the backup transmission path of destination node 704 according to this; And determine the data traffic of this backup transmission path according to the data traffic information of the 2nd MPLS TE LSP.

Destination node 704 also is used to utilize this backup transmission path of setting up with this source node 703, carries out transfer of data with this source node 703.

When carrying out the backup protection of transfer of data; data on the normal transmission path need be switched on the backup transmission path and transmit; the 3rd ASBR705; also be used for this renewal message is transmitted to an ASBR701; the one ASBR701 also is used for the protection information according to this renewal message, will switch on the 2nd ASBR702 in the data of transmitting on the ASBR701 to transmit.

In embodiments of the present invention, a BGP connects to be connected with the 2nd BGP and includes: utilize the connection of the bgp neighbor that bgp protocol sets up, this bgp neighbor is by the data traffic information of MPLS TE negotiation transmission the one MPLS TE LSP; The 3rd BGP connects to be connected with the 4th BGP and includes: utilize the connection of the bgp neighbor that bgp protocol sets up, this bgp neighbor is by the data traffic information of MPLS TE negotiation transmission the 2nd MPLS TE LSP.

One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, and described storage medium is floppy disk, hard disk or the CD etc. of computer.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1, a kind of cross-domain foundation is characterized in that based on the method for the traffic engineering technology MPLS TE label switching path LSP of multiprotocol label switching described method comprises:

2, the cross-domain method of setting up MPLS TE LSP according to claim 1 is characterized in that described method also comprises:

In the local terminal territory, foundation is connected with the 3rd BGP of the 3rd ASBR;

Receive the renewal message that described the 3rd ASBR transmits, described renewal message utilizes the 4th BGP that sets up with described the 3rd ASBR to be connected by the 4th ASBR in the territory, opposite end and sends to described the 3rd ASBR; The data traffic information and the protection information that comprise the 2nd MPLS TE LSP of described the 4th ASBR and destination node foundation in the described renewal message;

According to the protection information in the described renewal message, utilize that described the 3rd BGP connects, described the 4th BGP connects, and described the 2nd MPLS TE LSP, be established to the backup transmission path of destination node; And determine the data traffic of described backup transmission path according to the data traffic information of described the 2nd MPLS TE LSP.

3, the cross-domain method of setting up MPLS TE LSP according to claim 2, it is characterized in that, a described BGP connects to be connected with the 2nd BGP and includes: utilize the connection of the bgp neighbor that bgp protocol sets up, described bgp neighbor is by the data traffic information of the described MPLS TE LSP of MPLS TE negotiation transmission; Described the 3rd BGP connects to be connected with the 4th BGP and includes: utilize the connection of the bgp neighbor that bgp protocol sets up, described bgp neighbor is by the data traffic information of described the 2nd MPLS TE LSP of MPLS TE negotiation transmission.

4, the cross-domain method of setting up MPLS TE LSP according to claim 2 is characterized in that, before the renewal message that described the 3rd ASBR of described reception transmits, also comprises:

Described the 3rd ASBR sends to a described ASBR with described renewal message, and a described ASBR is according to the protection information in the described renewal message, and the data that will transmit on a described ASBR switch on the 2nd ASBR to be transmitted.

5, a kind of cross-domain device of setting up MPLS TE LSP is characterized in that described device comprises:

6, the cross-domain device of setting up MPLS TE LSP according to claim 5 is characterized in that described device also comprises:

Second receiver module is used to receive the renewal message that described the 3rd ASBR transmits, and described renewal message utilizes the 4th BGP that sets up with described the 3rd ASBR to be connected by the 4th ASBR in the territory, opposite end and sends to described the 3rd ASBR; The data traffic information and the protection information that comprise the 2nd MPLS TE LSP of described the 4th ASBR and destination node foundation in the described renewal message;

Second link block is used for the protection information according to described renewal message, utilizes described the 3rd BGP connection, described the 4th BGP to connect, and described the 2nd MPLS TE LSP, is established to the backup transmission path of destination node; And determine the data traffic of described backup transmission path according to the data traffic information of described the 2nd MPLS TE LSP.

7, the cross-domain device of setting up MPLS TE LSP according to claim 6, it is characterized in that, a described BGP connects to be connected with the 2nd BGP and includes: utilize the connection of the bgp neighbor that bgp protocol sets up, described bgp neighbor is by the data traffic information of the described MPLS TE LSP of MPLS TE negotiation transmission; Described the 3rd BGP connects to be connected with the 4th BGP and includes: utilize the connection of the bgp neighbor that bgp protocol sets up, described bgp neighbor is by the data traffic information of described the 2nd MPLS TE LSP of MPLS TE negotiation transmission.

8, a kind of cross-domain system that sets up MPLS TE LSP is characterized in that described system comprises:

9, the cross-domain system that sets up MPLS TE LSP according to claim 8 is characterized in that described system also comprises:

The 3rd ASBR is used for setting up the 4th BGP with the 4th ASBR and is connected, and receives the renewal message that described the 4th ASBR sends, and described renewal message is transmitted to source node;

The 4th ASBR is used for setting up described the 2nd MPLS TE LSP with destination node, utilizes described the 4th BGP to connect and sends described renewal message to described the 3rd ASBR, and described renewal message comprises the data traffic information of protection information and described the 2nd MPLS TE LSP,

Described source node also is used in the local terminal territory, sets up to be connected with the 3rd BGP of described the 3rd ASBR; Receive the renewal message that described the 3rd ASBR transmits,, utilize that described the 3rd BGP connects, described the 4th BGP connects, and described the 2nd MPLS TE LSP, be established to the backup transmission path of destination node according to the protection information in the described renewal message; And determine the data traffic of described backup transmission path according to the data traffic information of described the 2nd MPLS TE LSP;

Described destination node also is used to utilize the described backup transmission path of setting up with described source node, carries out transfer of data with described source node.

10, the cross-domain system that sets up MPLS TE LSP according to claim 9, it is characterized in that, a described BGP connects to be connected with the 2nd BGP and includes: utilize the connection of the bgp neighbor that bgp protocol sets up, described bgp neighbor is by the data traffic information of the described MPLS TE LSP of MPLS TE negotiation transmission; Described the 3rd BGP connects to be connected with the 4th BGP and includes: utilize the connection of the bgp neighbor that bgp protocol sets up, described bgp neighbor is by the data traffic information of described the 2nd MPLS TE LSP of MPLS TE negotiation transmission.

11, the cross-domain system that sets up MPLS TE LSP according to claim 9; it is characterized in that; described the 3rd ASBR also is used for described renewal message is transmitted to a described ASBR; a described ASBR also is used for the protection information according to described renewal message, and the data that will transmit on a described ASBR switch on the 2nd ASBR to be transmitted.