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the leaf AP couldn’t be online in WDS

Publication Date:  2015-10-27 Views:  141 Downloads:  0
Issue Description

product and version:AC6005-8 V200R003C00SPC300AP6510DN FIT V200R003C00SPCc00

Before replace the root AP, the leaf AP could be online normally, while after replacing it, the leaf AP couldn’t be online.

Handling Process

(1)first check the configuration: for the root ap, whether it has bind the radio-profilebridge-whitelist and so on.

ap 1 radio 1

  radio-profile id 1

  channel 20MHz 157

  coverage distance 70

  bridge enable mode root

  bridge whitelist enable

  bridge-whitelist id 1

  bridge-profile id 0

 ap 2 radio 1

  radio-profile id 1

  channel 20MHz 157

  bridge enable mode leaf

(2)check whether the coverage distance set the reasonable number

(3)check whether the version between leaf ap and root ap is the same

(4)Log in the root ap, find there are no vap existed using the commend [AP-diagnose]display interface radio 1 vap 13 list.

Then check the information ’display diag-logfile buffer’, find there are warings : Oct 22 2015 16:26:50+08:00 ap-1 %%01L2IF/5/CALLBACK_FAIL(D)[12662]:The process of the event callback function failed. (Module=L2_ADP_MacCfgRcvL2FdbEvt, Event=20, Command=406)

Oct 22 2015 16:26:50+08:00 ap-1 %%01WSRV/3/WSRV_ERROR(D)[12663]:STA MAC:101b-543e-ab9f

[wpa-lib]EAPOL-Key (msg2/4) Packet's MIC is wrong

Which means the key agreement is failed. So using‘reset factory-configuration’to make the root AP recover the factory defaults, then restart it. After that,the leaf AP is online.

Root Cause

The wds management link is ciphered using WPA2-PSK-CCMP,the key is saved in the AP flash in ciper way, so it may exist garbled characters, which will cause the wds between root ap and leaf ap is failure. Then we need to recover factory defaults of AP to solve this problem.

Solution

using‘reset factory-configuration’to make the root AP recover the factory defaults, then restart it.

Suggestions

When we check all is right, while the wds is still failure, so please check whether is the key agreement is failed

END