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Method and router for fast rerouting

A router and routing technology, which is applied in the field of network communication, can solve problems such as application deployment troubles, and achieve the effect of flexible and fast rerouting settings and protection of network traffic

Inactive Publication Date: 2010-12-08
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When performing FRR protection on the protected link, the specific protection strategy needs to be configured separately on all nodes along the route, which brings troubles to application deployment

Method used

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  • Method and router for fast rerouting
  • Method and router for fast rerouting
  • Method and router for fast rerouting

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] First, the extension of the Resource Reservation Protocol (RSVP, Resource ReServation Protocol) is introduced. The explicit route (ERO, Explicit Route) object carried by RSVP signaling has 1 byte reserved. An extension is performed so that each node to which the RVSP signaling arrives can identify whether the corresponding ERO object allows creation of a bypass tunnel or a bypass LSP.

[0024] Usually, the ERO object described by the RSVP protocol is composed of a series of sub-objects. The definitions of these sub-objects by the IPv4 protocol family and the IPv6 protocol family can be seen in Table 1 and Table 2.

[0025]

[0026] Table 1

[0027]

[0028] Table 2

[0029] As can be seen from Table 1 and Table 2, both protocols have a reserved (Resvd) field, the embodiment of the present invention uses this reserved field as a sign, by setting the first preset value to mark the current node as a PLR node, and setting the second preset value Mark the current nod...

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PUM

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Abstract

The invention relates to a network communication technology area, discloses the method for setting the local protection node, and realizes the method for quick routing and router, wherein the methods for realizing the quick routing are as follows: receive the route display object, the route display object includes the configuration item of setting the local protection node; parse the configuration item of setting the local protection node in the route display object, set whether the current node is local protection node; when the current node is set as the local protection node, and carry outthe quick rerouting protection for the protected links passing the current node. The invention can carry out the quick re-routing of the current node when the protected tunnel or LSP path fails, so it can protect the network traffic.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for setting a local protection node, a method for realizing fast rerouting and a router. Background technique [0002] Fast Reroute (FRR, Fast Reroute) is a mechanism used to form local protection in Multiprotocol Label Switching Traffic Engineering (MPLS TE, Multiprotocol Label Switching Traffic Engineering). When a certain label switching path (LSP, Label Switch Path) fails , take a protection action on the node where the discovery fails, and reroute the traffic to the protection path, so that the network traffic can be protected to the greatest extent, so that the data transmission will not be interrupted. Since the action of directing traffic to the protection path is a local action of a label switching router (LSR, Label Switch Router), this router that forms FRR protection and can switch traffic in the event of a failure is called a local protection n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/54
CPCH04L12/56
Inventor 刘春曾昕宗吕鑫
Owner HUAWEI TECH CO LTD