终端连接wifi固定时间点开始延迟丢包

[sujiaqi]

cisco wlc 2504+AIR-AP1832I-H-K9 组网。固定再每天早上8点至9点间，终端（就在AP旁边）（访问AP IP）延迟突然变大、丢包，需要手都断开wifi，再次连接恢复。这种问题如何排查？

[Rps-Cheers]

可以先看看此时的干扰、信道利用率等情况如何。尤其是早上，是不是有微波炉之类的电器在使用？

WLC上可以通过show ap auto-rf 802.11a/802.11b <ap-name> 查看

示例：

(Cisco Controller) >show ap auto-rf 802.11a Rps-mkap01

Number Of Slots.................................. 2 
AP Name.......................................... Rps-mkap01
...
 Interference Information <<<<<<<<<<<<<<<<<<<<<<<
    Interference Profile......................... PASSED
    Channel 36................................... -128 dBm @  0 % busy
    Channel 40................................... -128 dBm @  0 % busy
    Channel 44................................... -128 dBm @  0 % busy
    Channel 48................................... -128 dBm @  0 % busy
    Channel 52................................... -128 dBm @  0 % busy
...
 Load Information
    Load Profile................................. PASSED
    Receive Utilization.......................... 0 %
    Transmit Utilization......................... 0 %
    Channel Utilization.......................... 0 %  <<<<<<<<<<<<<<<<<<<<<<<<<<<<<
    Attached Clients............................. 1 clients
...
  Client Signal Strengths
    RSSI -100 dbm................................ 0 clients
    RSSI  -92 dbm................................ 0 clients
...
  Client Signal To Noise Ratios
    SNR    0 dB.................................. 0 clients
    SNR    5 dB.................................. 0 clients
    SNR   10 dB.................................. 0 clients
...

另外再WLC和AP上检查一下是否有异常的log：

WLC :show msglog、show traplog

AP ： show logg

如果AP无法console，可以通过如下方式开始AP远程接入方式：

config ap mgmtuser add username user password password enablesecret enable_password all

config ap ssh enable all