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Fast re-route (FRR) realization method and PE (Provider Edge) device

An implementation method and routing technology, applied in the field of communication, can solve problems such as incompatibility and complex control, and achieve the effects of reducing packet loss, improving service quality, and improving performance indicators

Active Publication Date: 2018-07-03
MAIPU COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Embodiments of the present invention provide a method for implementing fast rerouting and a PE device to solve the problem of incompatibility of existing VPN FRR solutions and the problem of complex control when the link on the user side fails

Method used

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  • Fast re-route (FRR) realization method and PE (Provider Edge) device
  • Fast re-route (FRR) realization method and PE (Provider Edge) device
  • Fast re-route (FRR) realization method and PE (Provider Edge) device

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Embodiment 1

[0047] The embodiment of the present invention provides a method for implementing fast rerouting. When the link on the user side fails, the route of the failed link is deleted, but the ILM (Incoming Label Map, incoming label mapping) entry corresponding to the route is delayed Delete. When there is a packet, find the corresponding next hop by searching the ILM entry for delayed deletion. Therefore, the packet loss is reduced in the process of realizing VPN FRR, and the problem of incompatibility of the solutions for realizing VPN FRR in the prior art and the problem of complicated control are solved.

[0048] Below to figure 2 The illustrated VPN network of CE dual-homing service provider network edge PE is taken as an example to describe the embodiment of the present invention in detail. In the VPN network, the CE equipment (CE2) is respectively connected to the second PE equipment (PE2) and the third PE equipment (PE3), and the first PE equipment (PE1) is the peer PE equip...

Embodiment 2

[0136] The embodiment of the present invention provides a PE device, which is one of the two PE devices connected to the CE device in a CE dual-homing PE network. VPN FRR is enabled on the PE device, and the CE device is connected to The address of another PE device is configured as the backup next hop of the route pointing to the CE device. The implementation of each functional module in this device can refer to the first embodiment above, and will not be repeated here. refer to Figure 4 The equipment shown includes:

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Abstract

The embodiment of the invention discloses a fast re-route (FRR) realization method and a PE (Provider Edge) device, which relate to the technical field of communication and aim at solving the problemsof incompatibility of the VPN (Virtual Private Network) FRR realization scheme in the prior art and control complexity when a user-side link fails. The method comprises steps: after a second PE device detects link fault with a CE (Customer Edge) device, the next hop of route pointing to the CE device is switched to a standby next hop; first private network route is deleted, an ILM table item corresponding to the first private network route in an ILM table is subjected to delay deletion, such that when a message pointing to the CE device needs to be forwarded, a next hop is searched from the undeleted ILM table item, wherein the first private network route is border gateway protocol (BGP) private network route learned from the CE device; and when the first private network route is deleted,a standard BGP notification message is sent to a first PE device at an opposite end, wherein the notification message is used for indicating the second PE device already deletes the first private network route.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a fast rerouting implementation method and PE equipment. Background technique [0002] Today, with the rapid development of the network, operators attach great importance to the speed of service convergence when the network fails. When any node fails, the service switching of adjacent nodes is less than 50ms, and the end-to-end service convergence is less than 1s. Threshold-level indicators. [0003] In order to meet the requirements of adjacent node service switching within 50ms and end-to-end service convergence within 1s, MPLS (Multi-Protocol Label Switching, Multi-Protocol Label Switching) TE (Traffic Engineering, process engineering) FRR (Fast Re-Route, fast re-routing) Routing) technology, IGP (Interior Gateway Protocol, Interior Gateway Protocol) route fast convergence technology (IP FRR) have all emerged at the historic moment, but none of them can solve th...

Claims

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Application Information

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IPC IPC(8): H04L12/707H04L12/721H04L12/733H04L12/46H04L45/24H04L45/122
CPCH04L12/4641H04L45/20H04L45/22H04L45/50
Inventor 卢祖友
Owner MAIPU COMM TECH CO LTD
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