Method, system and device for recovering control and provisioning for wireless access point (CAPWAP) tunnel

Abstract

The invention discloses a method, a system and a device for recovering control and provisioning for wireless access point (CAPWAP) tunnel. The method comprises the steps that: when the CAPWAP tunnel between an access point (AP) and an access controller (AC) fails, the AP and AC set states as operating information locking states respectively and save the session identifier (ID) of the failed CAPWAP tunnel; the AP locks the saved operating information, aborts the detection for a station and does not respond to the connection request or offline request of the station; the AP interacts with the AC for the tunnel recovery message, the AP and the AC recover states as operating sates respectively to recover the failed CAPWAP tunnel; the message comprises the information about the AP and the AC being in the operation information locked state and the session ID of the failed CAPWAP tunnel; the AP starts the detection for the station to update the operating information. According to the invention, the AP still can keep the service for the station uninterrupted during the recovery of the CAPWAP tunnel.

Description

technical field [0001] The invention relates to the technical field of WLAN, in particular to a method, system and device for realizing CAPWAP tunnel recovery. Background technique [0002] There are two typical networking architectures of a wireless local area network (WLAN), namely a fat access point (FAT AP) architecture and a thin access point (FIT AP) architecture. [0003] Such as figure 1 It is a schematic diagram of the WLAN structure of the FIT AP architecture in the prior art. The WLAN system includes an access controller (AC), an AP, and a station device (Station), wherein the AC is responsible for controlling and managing multiple APs; a wireless network is established between the Station and the AP. To connect, use the association ID (AssociationID) as the identification of the wireless connection; establish a wireless access point control and configuration (CAPWAP, Control and Provisioning for Wireless Access Point) tunnel between the AP and the AC, and use th...

AI Technical Summary

Problems solved by technology

If the original CAPWAP tunnel is restored, the process of AP clearing the old connection with the Station and establishing a new connection in the subsequent process is actually a waste, because the old connection is the same as the new connection

However, this process of clearing and re-establishing the connection causes the AP to interrupt the service of the Station

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