A method and device for implementing roaming between wireless controllers AC

Abstract

The embodiment of the invention provides a method for realizing roaming between wireless controllers AC, applied to a first wireless local area network access device. The method comprises the following steps: detecting a trigger condition, and when the trigger condition is detected, determining whether a security table entry corresponding to an associated terminal STA exists within a preset time period; if no security table entry is detected, initiating an IP address releting request to a DHCP server according to the MAC address of the associated STA, so that the DHCP server establishes a new lease for the IP address of the associated STA; and establishing the security table entry corresponding to the associated STA according to the feedback of the DHCP server for the IP address releting request. Meanwhile, the embodiment of the invention further provides an apparatus for realizing roaming between wireless controllers AC. The method and apparatus provided by the embodiment of the invention have the beneficial effects of solving the problem that the access device has no terminal STA security table entry, resulting in that the terminal cannot access the network, and enabling the terminal to normally access the network while roaming among ACs.

Description

technical field [0001] The present invention relates to the field of data communication, in particular to a method and device for realizing roaming among wireless controllers AC. Background technique [0002] ROAM (roaming) is a function provided to meet the behavior of reassociation when wireless users move within the coverage of different APs (Access Points, wireless access points). The roaming function allows wireless users, namely STA (Station, Wireless workstations) continue to maintain the original IP communication and continue to enjoy all application services during the mobile process. For users, the roaming behavior is transparent, that is, the STA will not perceive the occurrence of roaming during the roaming process. [0003] DHCP Snooping means DHCP snooping. By snooping on the DHCP (DynamicHost Configuration Protocol, Dynamic Host Configuration Protocol) interactive message between the DHCP Client and the server, the record and monitoring of the user's IP addres...

AI Technical Summary

Problems solved by technology

[0018] Solution 1: Currently there is no standard to regulate the backup of security table items. If Option 1 is adopted, it is limited to the equipment of a single device manufacturer, using a private protocol for backup, that is, the roaming migration of wireless devices across manufacturers still cannot solve the problem, unless there is a cross-vendor standard backup protocol

[0019] Solution 2: The purpose of roaming is to improve the user's wireless experience. If you adopt solution 2, the user experience during roaming will be poor.

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