Backup method based on address parsing protocol proxy

Abstract

The utility model relates to an ARP Proxy technology, disclosing a method of enabling backup in the ARP Proxy, enabling the system resource to be fully utilized and the reliability of message transmission to be guaranteed when the VRRP and the ARP Proxy are used in a router simultaneously. The method of enabling backup in the ARP Proxy responses request in different MAC addresses based on the forwarding capability and the network bandwidth of various routers in the VRRP backup group; correlated judging function, virtual MAC function and judging ARP response function are added to the router, making the ARP Proxy and the VRRP combine organically.

Description

technical field [0001] The present invention relates to ARP Proxy technology, in particular to the technology of using ARP Proxy and VRRP simultaneously. Background technique [0002] In today's widely used Ethernet (Ethernet), if a host wants to communicate directly with another host, it must know the second-layer physical address of the target host, that is, the Medium Access Control (MAC) address, for example , In a local area network (Local Area Network, referred to as "LAN"), the network transmits data in the form of frames, and each frame transmitted in the network includes the MAC address of the target host. Before the host sends a frame, it needs to convert the third-layer address of the target host, that is, the Internet Protocol (IP) address for short, into the MAC address of the target host. "ARP") completes. The basic function of the ARP protocol is to query the target MAC address through the target IP address to ensure the smooth progress of communication. Am...

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Problems solved by technology

[0016] In practical application, the above scheme has the following problems: firstly, the system resources of the existing technical scheme are not fully utilized, and the forwarding capability and network bandwidth of the backup router are wasted

[0022] Case 3. When a router in the backup group (assuming that the router is router A) sends an ARP request to the destination host, since the ARP request is a broadcast message, other routers in the backup group that have started ARP Proxy will also respond to the ARP request. The request responds, which may cause the destination host IP to correspond to the MAC address of other routers in the backup group (assuming that the router is router B) in the ARP cache table of router A

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