Optimization method and device for VXLAN (Virtual Extensible Local Area Network) control plane

Abstract

The invention provides an optimization method and device for a VXLAN (Virtual Extensible Local Area Network) control plane. The method and the device are applied to a local VTEP (VXLAN Tunneling End Point) device. The method comprises the steps of receiving an ARP (Address Resolution Protocol) request message sent by a first VM (Virtual Machine) and learning an ARP table entry corresponding to the first VM; filling an MAC address of the first VM in the ARP table entry into an IP prefix route message; sending the IP prefix route message to an opposite VTEP device, thereby enabling the opposite VTEP device to establish a VXLAN tunnel with the local VTEP device based on the IP prefix route message, learn the ARP table entry corresponding to the first VM, and further return the learned ARP table entry corresponding to the first VM to a second VM when the ARP request message which is sent by the second VM and is used for requesting the MAC address of the first VM is received. According to the method and the device, the problem that a great number of broadcast messages exist in a network and the pressure of a routing device in the network is too heavy when a great number of hosts in the VXLAN network carry out initial communication is solved.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a method and device for optimizing a VXLAN control plane. Background technique [0002] With the rapid development of cloud computing, the degree of virtualization of data centers is getting higher and higher, and the requirements for physical networks are becoming more and more stringent. For example, TOR switches need to support large-scale MAC address tables; 4094 VLANs (Virtual Local Area Network, virtual Local area network) cannot divide a large number of virtual machines; it is necessary to support multi-tenant network isolation, etc. It is these requirements that make the overlay network technology VXLAN (Virtual Extensible Local Area Network, Virtual Extensible Local Area Network) emerge as the times require. [0003] VXLAN between different VNIs (VXLAN Network Identifier, Virtual Extensible Local Area Network Identifier), and between VXLAN and non-V...

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Problems solved by technology

[0012] In view of this, this application provides a VXLAN control plane optimization method and device to solve the problem of establishing a VXLAN tunnel through the IP prefix route defined by the BGP EVPN protocol in a distributed gateway scenario. When there are a large number of hosts that need to communicate, the initial After the communication sends the ARP request message, there will be a large number of broadcast messages in the network, which will lead to the problem of excessive pressure on the routing equipment in the network

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