Method and device for avoiding loop in EVPN multi-homing networking

A multi-homing and networking technology, applied in the field of communication, can solve problems such as a large number of labels, short-term loops in the network, and the inability of the bypass label to identify the source of the network message.
CN112104547AActive Publication Date: 2020-12-18XINHUASAN INFORMATION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
XINHUASAN INFORMATION TECH CO LTD
Publication Date
2020-12-18

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Abstract

The invention provides an EVPN multi-homing networking loop avoiding method and device, and the method comprises the steps: receiving a first network message sent by a far-end PE, and the first network message comprises a first VPN label of a first PE; obtaining a local VPN instance corresponding to the first VPN label according to the first VPN label, and obtaining a first output interface of theVPN instance; when it is determined that the first link corresponding to the first outbound interface fails, a second network message is sent to a second PE through a bypass link, and the second network message comprises a bypass label of the second PE and a second VPN label of the second PE, so that the second PE determines that the second network message is sent by the first PE belonging to thesame multi-homing group through the bypass link according to the bypass label of the second PE, and discarding the second network message when determining that the corresponding second link fails according to the second VPN label.
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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 EVPN multi-homing networking. Background technique

[0002] In an Ethernet virtual private network (English: Ethernet Virtual Private Network, EVPN for short) multi-homing networking, when a link fails, in order to achieve the purpose of uninterrupted traffic, a bypass (bypass) link technology is usually used. like figure 1 as shown, figure 1 A schematic diagram of an EVPN multi-homing network is provided. After the data packet sent by the customer edge (English: Customer Edge, CE for short) 2 arrives at PE3, PE3 encapsulates the data packet, and can pass the equivalent path between PE1 and PE2 to obtain the network The message is forwarded to the provider edge (English: Provider Edge, PE for short) 1 or PE2, and any one of PE1 and PE2 decapsulates the network message and sends the data message to CE1. When the ...

Claims

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