A dynamic host configuration protocol message processing method and device

Abstract

The invention discloses a dynamic host configuration protocol message processing method and device, which receives a DHCP request message forwarded by a first switching endpoint to which a source virtual machine belongs, and the DHCP request message carries an identifier of a virtual local area network to which the source virtual machine belongs; according to the source The identification of the virtual local area network to which the virtual machine belongs is determined as the IP address of the DHCP service node served by the source virtual machine; according to the IP address of the determined DHCP service node, the IP address of the second switch endpoint to which the DHCP service node belongs is determined; The endpoint sends a forwarding instruction, and the forwarding instruction carries the IP address of the second switching endpoint, so that the first switching endpoint sends the DHCP request message in unicast form to the second switching endpoint according to the IP address of the second switching endpoint . Through the present invention, the switching endpoint of the destination virtual machine can be determined in a unicast manner, thereby reducing the usage of network traffic in the virtual local area network and saving network resources.

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 space of VLAN (Virtual Local Area Network, Virtual Local Area Network) 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 , Virtual Extensible LAN) 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 (VXLANNetwork Identifier, virtual scalable LAN Network Identifier) ​​for identification, each VNI ca...

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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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