Implementation method and device for IPv6 (Internet Protocol Version 6) neighbor discovery protocol in WLAN (Wireless Local Area Network)

Abstract

The invention provides an implementation method and device for an IPv6 (Internet Protocol Version 6) neighbor discovery protocol in a WLAN (Wireless Local Area Network). The method comprises the following steps of: storing each wireless client side-belonged logic group associated to an AP (Assess Point) in the AP in advance, wherein the wireless client side comprises a host computer and a router; and confirming a message-belonged logic group when the AP receives a neighbor discovery protocol-related message sent by the wireless client side or a wired network in a multicast manner, and respectively sending the message to other wireless client sides same as the message-belonged logic group in a unicast manner according to each pre-stored wireless client side-belonged logic group associated to the AP. When the method is adopted, normal operation of the neighbor discovery protocol in the WLAN can be realized.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and a device for realizing the Internet communication protocol version 6 (IPv6) neighbor discovery protocol (ND) in a wireless local area network (WLAN). Background technique [0002] The Neighbor Discovery Protocol is one of the basic protocols in the IPv6 protocol family. It mainly uses router solicitation messages, router advertisement messages, neighbor solicitation messages, neighbor advertisement messages, etc. to complete gateway discovery, automatic address configuration, address One-hop, neighbor unreachable detection, duplicate address detection and other functions. These packets are mostly exchanged in the form of multicast. Take gateway discovery and address automatic configuration as examples. After the host starts up, it will send a router solicitation message to all router multicast groups. After receiving the router solicitation message, the router...

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Problems solved by technology

Combine below figure 1 For illustration, take Router Advertisement as an example. When the Router Advertisement message sent by Router 1 reaches the AP in multicast mode, the AP broadcasts it to each client through the air interface. The client B in the logical group also received the notification message, but client B cannot distinguish the logical group to which it belongs, so it will use the router advertisement as the notification of the logical group to which it belongs, and will send the router notification message Router 1 is added to its own gateway list, and automatically configures its own network card address according to the address prefix in the router advertisement message, thus causing address configuration errors and bringing confusion to the entire network

[0005] It can be seen that the current IPv6 Neighbor Discovery Protocol cannot run normally in WLAN.

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