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Method and device for avoiding loops in evpn multi-homing networking

A multi-homing and networking technology, applied in the field of communications, can solve the problems of bypass labels unable to identify the source of network packets, too many labels, and short-lived network loops.

Active Publication Date: 2022-07-12
XINHUASAN INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] In view of this, this application provides a method and device for avoiding loops in an EVPN multi-homing network, which is used to solve the problem that in the prior art, PEs are not configured with independent bypass labels and cannot identify the source of network packets, resulting in short-lived The loop problem and the independent bypass label of the PE configuration lead to the problem of too many labels

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  • Method and device for avoiding loops in evpn multi-homing networking

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[0022] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.

[0023] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and / or" as use...

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Abstract

The present application provides a method and device for avoiding loops in an EVPN multi-homing network. The method includes: receiving a first network packet sent by a remote PE, where the first network packet includes a first VPN label of the first PE; According to the first VPN label, obtain the local VPN instance corresponding to the first VPN label, and obtain the first outgoing interface of the VPN instance; when it is determined that the first link corresponding to the first outgoing interface is faulty, use the bypass link to send the The second PE sends a second network packet, where the second network packet includes the bypass label of the second PE and the second VPN label of the second PE, so that the second PE determines the second network packet according to the bypass label of the second PE The second network packet is discarded when the first PE belonging to the same multi-homing group is sent through the bypass link, and it is determined according to the second VPN label that the corresponding second link is faulty.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular, to a method and device for avoiding loops in an EVPN multi-homing network. Background technique [0002] In an Ethernet Virtual Private Network (English: Ethernet Virtual Private Network, EVPN for short) multi-homing networking, when a link fails, a bypass link technology is usually used to achieve uninterrupted traffic. like figure 1 shown, figure 1 Provided is a schematic diagram of an EVPN multi-homing network. After the data packet sent by the customer edge (English: Customer Edge, CE) 2 reaches PE3, after PE3 encapsulates the data packet, it can pass the equivalent path between PE1 and PE2 to encapsulate the resulting network. The packet is forwarded to Provider Edge (English: Provider Edge, PE for short) 1 or PE2, and any PE of PE1 and PE2 decapsulates the network packet and sends a data packet to CE1. When the link between PE1 and CE1 goes down, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L45/18H04L45/28
CPCH04L45/18H04L45/28
Inventor 陈建
Owner XINHUASAN INFORMATION TECH CO LTD
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