终端异常掉线如何排查？

[kennyS]

寻求各位大神的帮助！

1、终端异常掉线如何排查？无线控制器 or AP上 有没有相关的show命令或者debug命令来查看？

2、在ap上如何空口抓包？

[Rps-Cheers · Accepted solution]

排查终端掉线的问题，可以在WLC以及AP的排查可以参考如下的文档：

Troubleshoot AireOS Wireless LAN Controllers

Client Connection Issues

Client Debug

• debug client xx.xx.xx.xx.xx.xx

 

Controller Does not Like the Association Request

Packet Capture

• Airopeek capture on the channel from which the AP is set. It is recommended to avoid filtering because the beacon and probe req/resp packets can be missed. Make sure to capture the event when the connection is ended.
• In case the client does not connect, capture the whole event from prob request until the session is ended (for example, deauth is sent and association response with status-code as non 0).
• Provide the client and AP MAC addresses.

Note: The AP MACi s base Radio MAC + WLAN-ID.

Config and Show Output to Collect on the Controller

• show sysinfo—WLC’s version details
• show wlan x—on WLC for the affected WLAN
• show run-config—of WLC
• show debug
• show msglog
• show tech-support—of WLC (good to have, but not necessary)

Client Details

• Client hardware—Supplicant software details such as version and software name (for example, ADU or Odyssey)

• Client OS—If it is Windows, provide the client system configuration, go to Programs > Accessories > System Tools > System Information.

关于空口抓包，可以参考如下：

Analyze and Troubleshoot 802.11 Wireless Sniffing

可以使用sniffer模式的AP，或者使用MAC OS自带的工具来进行，具体可以参考如上链接。