Method and device for processing dynamic host configuration protocol messages

Abstract

The invention discloses a method and device for processing dynamic host configuration protocol messages. The method comprises the steps that a DHCP request message forwarded by a first exchange endpoint containing a source virtual machine is received, wherein the DHCP request message carries an identification of a virtual local area network containing the source virtual machine; an IP address of a DHCP service node which serves the source virtual machine is determined; an IP address of a second exchange endpoint containing the DHCP service node is determined according to the determined IP address of the DHCP service node; a forwarding instruction is sent to the first exchange endpoint, wherein the forwarding instruction carries the IP address of the second exchange endpoint so that the first exchange endpoint can send the DHCP request message in a unicast mode to the second exchange endpoint according to the IP address of the second exchange endpoint. According to the method and device for processing the dynamic host configuration protocol messages, exchange endpoints of a target virtual machine can be determined in a unicast mode, consumption of the network traffic in the virtual local area network is reduced, and network resources are saved.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and device for processing a dynamic host configuration protocol message. Background technique [0002] With the wide application of virtual technology, the VLAN (Virtual Local Area Network, Virtual Local Area Network) space in the data center network can no longer meet the demand of the data center network for virtual local area network. To make up for the shortage of VLAN space, VXLAN (Virtual eXtensible Local Area Network Network, Virtual Extensible Local Area Network) came into being. [0003] VXLAN builds a virtualized layer-2 network on the physical layer-3 network by using tunnel port technology on the source virtual machine side, and creates a large number of virtual local area networks on the existing network architecture. Different virtual local area networks use VNI (VXLAN Network Identifier, virtual Extended LAN Network Identifier) ​​for identif...

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Problems solved by technology

[0005] Generally, the switching endpoint to which the source virtual machine belongs uses the PIM (Protocol Independent Multicast, Protocol Independent Multicast) multicast method to learn the MAC address of the destination virtual machine and the IP address of the tunnel endpoint. The PIM multicast specification of the switching endpoint is relatively small. , generally supports 500-2000 multicast groups, and some switch endpoints may not support PIM multicast, and VXLAN can support 16M VNIs in standard, so in the existing VXLAN network, due to the number of switch endpoint multicast groups Insufficient or no support for multicast will result in a limited number of VNIs created, which will affect the number of virtual LANs created in the data center network, and the switch endpoints use multicast to communicate in the virtual LAN, which requires more network traffic. More resource usage

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