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Method and device for achieve bidirectional segment routing tunnel

A tunnel, the only technology, applied in the field of improvement of SR tunnel establishment methods, can solve the problem that SR tunnel cannot meet the needs of all scenarios, and achieve the effect of expanding application scenarios

Active Publication Date: 2019-01-15
ZTE CORP
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  • Description
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Problems solved by technology

[0010] This article provides a method and device for implementing a bidirectional segment routing tunnel, which can solve the problem that SR tunnels cannot meet the requirements of all scenarios in related technologies

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  • Method and device for achieve bidirectional segment routing tunnel
  • Method and device for achieve bidirectional segment routing tunnel
  • Method and device for achieve bidirectional segment routing tunnel

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described in detail below in conjunction with specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

[0043] The inventor of the present application proposes to design a method for implementing SR bidirectional tunnels. The method involves forwarding devices running SR and related controllers, and assigns a unique label to each SR tunnel to identify the end-to-end path. The principle of this method is as image 3 As shown, compared with the standard SR tunnel, this method mainly introduces a separate ListSID label to identify an end-to-end connection. The List SID is placed in the label stack as a part of the SR tunnel label stack to identify a complete Unidirectional ...

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Abstract

The invention discloses a method and device for achieve a bidirectional segment routing tunnel and relates to the MPLS / MPLS-TP network SR tunneling technology. The method for achieving the bidirectional segment routing tunnel includes: after receiving a command of creating a bidirectional SR tunnel between a node A and a node Z, a controller calculates a path that meets a command requirement between the node A and the node Z, separately allocates unique List SIDs to a first direction A->Z tunnel and a second direction Z->A tunnel corresponding to the path, and separately configures that the List SID of the first direction A->Z tunnel and the List SID of the second direction Z->A tunnel as a binding relationship of the bidirectional tunnel at the node A and the node Z; and the controller places the List SIDs, as a part of a SR label stack, into the label stack at the two endpoints of the tunnel and pushes the same into a user message and forwards the message.

Description

technical field [0001] The invention relates to MPLS / MPLS-TP network SR (segment routing) tunnel technology, in particular to the improvement of the SR tunnel establishment method, so that the transmission network can realize the bidirectional SR tunnel. Background technique [0002] IPRAN and PTN packet networks based on IP / MPLS or MPLS-TP technology are widely used in the bearer of wireless base station backhaul services. Through the establishment of end-to-end tunnels through MPLS label switching technology, connection-oriented services can be provided for businesses. But traditional tunnel creation techniques (LDP, RSVP-TE, static tunnel) have their own problems. [0003] RSVP-TE tunnel, the intermediate node needs to maintain the soft state of each connection, the scalability is poor. [0004] Although LDP tunnels and static tunnels do not need to maintain state on the control plane, forwarding information needs to be configured for each connection on the forwarding p...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L12/911H04L45/50
CPCH04L45/50H04L45/507H04L47/825H04L12/4633H04L45/34
Inventor 詹双平温建中陶慕柳刘爱华廖国庆
Owner ZTE CORP
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