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Method and apparatus for maintaining routing table

A technology for maintaining devices and routing tables, applied to data exchange through path configuration, digital transmission systems, electrical components, etc., can solve the problems of low routing information notification efficiency and affecting VRF update speed, etc., to improve notification performance and reduce search Number of times, the effect of improving configuration speed and update speed

Inactive Publication Date: 2009-07-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each VRF must advertise routing information to other VRFs except itself. When there is a large amount of routing information and a large number of VRFs, the total number of times to search for routing information is large, resulting in low efficiency of routing information notification and affecting the update speed of VRF.

Method used

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  • Method and apparatus for maintaining routing table
  • Method and apparatus for maintaining routing table
  • Method and apparatus for maintaining routing table

Examples

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Embodiment Construction

[0031] The embodiment of the present invention saves the routing information in a plurality of target routing tables after finding the routing information once, so as to reduce the times of routing information searching and improve the efficiency of routing information notification. The embodiments of the routing table maintenance method and device of the present invention, and the embodiment of the edge router adopting the maintenance method will be described in detail below with reference to the accompanying drawings.

[0032] After the main board of the edge router fails, the system of the edge router will automatically enable the backup board. When the edge router performs active / standby switchover, the information in the main board needs to be reconfigured on the backup board. If the VPN is established through the edge router, the edge router needs to reconfigure the address family of each site in the VPN on the standby board, and needs to reconfigure the VRF of each site....

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Abstract

The embodiment of the invention discloses a method and a device for maintaining a routing list, which relate to announcement of a routing message in a virtual private network (VPN) and solve the problem that the frequency of a virtual routing and forwarding (VRF) instance searching the same routing message in the prior VPN in case of announcement of a routing message is higher. The method comprises the following steps: selecting a source routing list and target routing lists; searching every routing message in the source routing list; and storing the searched routing message into at least two target lists, respectively. The device comprises a routing list selection module used for selecting the source routing list and the target routing lists; a routing message searching module used for searching the routing messages in the source routing list; and a distribution module used for distributing the searched routing messages into at least two target lists. The embodiment of the invention is mainly applicable in an edge router which constructs the VPN.

Description

technical field [0001] The present invention relates to establishing a virtual private network on the basis of an existing network, in particular to a maintenance method of a virtual routing forwarding table (VRF) in a VPN, a routing table maintenance device corresponding to the maintenance method, and an edge router adopting the maintenance method . Background technique [0002] A virtual private network (Virtual Private Networks VPN) establishes a temporary and secure connection through a public network (usually the Internet), and is a safe and stable tunnel through a chaotic public network. When an operator's core network can generally set up many VPNs, when one of the provider edge routers (Provider Edge PE) needs to connect to two VPNs, and the two VPNs still use the same IP address segment, the PE cannot distinguish Which VPN does the received data belong to, causing local routing conflicts. In order to solve this local routing conflict, VRF technology is introduced,...

Claims

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Application Information

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IPC IPC(8): H04L12/46H04L12/56H04L12/24
Inventor 倪辉陈双龙白涛王苌曾晴宋宝华杨宏杰刘莉
Owner HUAWEI TECH CO LTD
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