Method for achieving address resolution protocol proxy through two-layer virtual local area network and local area network system

Abstract

The invention discloses a method for achieving the address resolution protocol proxy through a two-layer virtual local area network and a local area network system. The method comprises the steps that an IP stack is configured in drive of the two-layer virtual local area network; the address resolution protocol proxy function is configured on the virtual local area network; a message is received, and an address resolution protocol request is sent to a corresponding virtual local area network according to a matched virtual local area network tag; whether a computer requested by the address resolution protocol and the two-layer virtual local area network are the same network segment or not is judged, if not, the request is ignored, and if yes, the two-layer virtual local area network feeds media access control of the two-layer virtual local area network back to the computer; the two-layer virtual local area network broadcasts the address resolution protocol request; the two-layer virtual local area network receives the response to the address resolution protocol; routing information is written in a forwarding table. According to the method, user configuration is simplified, the virtual local area network with the routing function is built by configuration of the IP and the address resolution protocol proxy, the two-layer or three-layer virtual local area network does not need to be designed much, the internal processing procedure is optimized, and the processing time of the system is saved.

Description

technical field The invention relates to a method for realizing an address resolution protocol agent through a two-layer virtual local area network based on a mixture of two-layer and three-layer virtual local area networks and a two-layer virtual local area network system. Background technique Currently, optical line terminal (OLT) devices on the market usually support both Layer 2 and Layer 3 virtual local area networks (Virtual Local Area Network, VLAN). Users are isolated from each other on the second layer and cannot communicate with each other. When Layer 3 communication needs to be performed between Layer 2 isolated users, that is, Layer 2 VLANs, the Address Resolution Protocol (ARP) proxy function of Layer 3 VLANs needs to be configured. The following uses Layer 3 intercommunication of Layer 2 VLANs as an example to introduce the ARP proxy function. A Layer 3 VLAN includes multiple Layer 2 VLANs, each Layer 2 VLAN is a broadcast domain, and the Layer 2 isolation ...

AI Technical Summary

Problems solved by technology

(2) Since host B is not in the broadcast domain of VLAN 2', it cannot receive the ARP request from host A

1) It is necessary to configure a layer-2 VLAN and a layer-3 VLAN, add the layer-2 VLAN to the layer-...

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