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Method and device for realizing virtual private network fast reroute by network processor

A virtual private network and network processor technology, applied in the field of data transmission, can solve problems such as FRR attribute conflicts, achieve the effects of convenient implementation, reducing the number of table lookups, and saving space

Inactive Publication Date: 2012-11-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method and device for fast rerouting in a virtual private network to solve the problem of FRR attribute conflicts when two types of FRR exist at the same time

Method used

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  • Method and device for realizing virtual private network fast reroute by network processor
  • Method and device for realizing virtual private network fast reroute by network processor
  • Method and device for realizing virtual private network fast reroute by network processor

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Embodiment Construction

[0033]The main idea of ​​the present invention is to set VPN FRR as the link protection whose protection level is higher than that of outer layer FRR, and the time for VPN FRR to sense link failure is slightly longer than outer layer FRR (milliseconds), that is, if a section of link or node is between two If there is an overlapping area protected by two types of FRR, and both types of protection can be protected by FRR technology, then the outer layer of FRR takes effect.

[0034] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] Such as Figure 3A As shown, the method for utilizing the network processor of the present invention to realize the coexistence of VPN FRR and outer layer FRR comprises the following steps:

[0036] Step 301. Establish a link, deploy VPN FRR and outer layer FRR in the link at the same time, set the link protection of VPN FRR protection level higher than outer la...

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Abstract

The invention provides a method and a device for realizing a virtual private network fast reroute by a network processor, comprising the following steps of establishing a link and deploying the virtual private network fast reroute (VPNFRR) and an outer layer fast reroute (FRR) as a less preferred link in the link, and setting a protection level of the VPNFRR link higher than that of the outer layer FRR link; when judging a failure in the preferred link is in failure, and judging the position of the occurred failure in the preferred link is a PE nodal point or the link locating in an area of customer edge switching equipment (CE) or dual-homed provider edge switching equipment (PE) applying the VPNFRR without protection from the deployed outer layer FRR, obtaining information of the VPN FRR and packaging and forwarding a data packet through the VPNFRR link. The invention solves the problem of property conflicting of the VPNFRR and the outer layer FRR existing in the network.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to a method and device for quickly switching to a standby link in a VPN (virtual private network) when a link fails. Background technique [0002] VPN FRR (Virtual Private Network Fast Re-Routing: virtual private network fast re-routing) is applied to CE (Customer Edge router, user edge switching device) dual-homing network structure, that is, the remote CE is dual-homed to two PE (Provider Edge route : service provider edge switching device), and there are VPN routes to two PEs on the local PE at the same time, this is a very common networking form. figure 1 What is shown is a simple example of CE dual-homing network structure, and each device shows the encapsulation format of the export data packet of the device. CE2 belongs to PE2 and PE3 at the same time. Both PE2 and PE3 will advertise routes pointing to CE2 to PE1 and assign their respective VPN labels. In this way, there are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/46H04L45/28
Inventor 闫学涛敖斌
Owner ZTE CORP
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