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Loop detection method and device

A loop detection and identity technology, applied in the field of communication, which can solve problems such as loop detection packet flooding

Active Publication Date: 2020-06-05
NEW H3C SECURITY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present application provides a loop detection method and device to solve the problem that in the prior art, each device in the EVPN networking needs to additionally enable the loop detection function, and a large number of loop detection messages are The problem of flooding in the network

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Embodiment Construction

[0075] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying 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 do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0076] 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 should also be understood that the term ...

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Abstract

The invention provides a loop detection method and device. The method is applied to a first leaf node, and the first leaf node is located in an Ethernet virtual private network (EVPN). The method comprises the following steps: the first leaf node receives a free ARP message sent by a two-layer network device through a local first port, wherein the free ARP message comprises an ARP header, and theARP header comprises a first IP address; the first leaf node judges whether the first IP address is the same as a second IP address of the first leaf node or not; if so, the first leaf node judges whether the first IP address is an EVPN distributed gateway address or not; and if so, the first leaf node sends loop alarm information.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a loop detection method and device. Background technique [0002] The extensible virtual local area network (Virtual eXtensible LAN, VXLAN for short) network virtual machine technology is a technology based on an IP network that adopts the encapsulation form of "MAC in UDP" to realize a Layer 2 VPN. On the basis of VXLAN, the EVPN control plane uses MP-BGP to notify the host address (MAC, IP) and host routing information attached to the leaf node (leaf), which can greatly reduce the number of Ethernet virtual private network (English: Ethernet Virtual Private Network, Abbreviation: EVPN) address resolution protocol (English: Address Resolution Protocol, abbreviation: ARP) core network bandwidth occupation of broadcast packets. [0003] If the user misuses the network, there is a loop in the host connected to the leaf: for example, there is a loop in the ho...

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Application Information

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IPC IPC(8): H04L12/46
CPCH04L12/4637H04L12/4641H04L12/4675
Inventor 杨柳
Owner NEW H3C SECURITY TECH CO LTD
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