某局点V5的AC升级了版本后导致AP无法注册,排查版本、网络、配置等问题都正确,常规的排查思路检查都无误,仍然无法注册。
打开debug收集信息,打印的debug信息如下:
*Mar 6 15:45:29:264 2018 wuxian LWPS/7/Event: Discovery request message received from AP with WA4320-ACN Model and Serial-ID 210235A1GTC15B000969 and IP [10.239.45.69] and SoftVer [279075584].
*Mar 6 15:45:29:265 2018 wuxian LWPS/7/Error: SUB AP: Failed to get Node, not found [3891-D598-7960].
*Mar 6 15:45:29:265 2018 wuxian LWPS/7/Event: Success get software version [279075968].
*Mar 6 15:45:29:265 2018 wuxian LWPS/7/Event:
Software length [20] is not target, no need to check img policy.
*Mar 6 15:45:29:265 2018 wuxian LWPS/7/Error: Failed to connect to AC for AP meishuxuexiao_xingzhenglou3f2 [Serial-ID 210235A1GTC15B000969][MAC:3891-d598-7960].
*Mar 6 15:45:29:266 2018 wuxian LWPS/7/Error: Discovery Request is dropped due to Unknown failure
Debug中报错Discovery Request is dropped due to Unknown failure,Discover报文被丢弃,这一步说明网络没有问题,接收到了Discovery报文,但设备自己丢弃,由于V5的AC缺省情况是开启了Lwapp协议功能,如果手动打开Capwap协议功能时,优先用Capwap协议,而V5的AP虽然也支持Capwap协议,但并不能很好的兼容,这样就会导致报文被丢弃。
V5设备打开Capwap协议功能时,必须重启设备才会生效,现场尝试过将AP用AC做V7降V5,那么非常有可能是上次开启Capwap协议后,没有重启设备,也没有生效,这次升级设备的时候重启了,导致Capwap协议生效。
需要将Capwap隧道协议关闭,然后重启设备。配置方法如下:
[AC]_h //进入隐藏模式
[AC-hidecmd]fpl-diag enable//必须先enable
Are you sure you want to enable FPL-DIAG? [Y/N] y
% FPL-DIAG has been enabled.
[AC-hidecmd]fpl-diag drv_capwap_set 1 //打开capwap
[AC-hidecmd]fpl-diag drv_capwap_set 0 // 关闭capwap
用V5 AC做完AP的降级操作后,一定要将Capwap协议关闭,另外不管是关闭还是开始Capwap都需要重启设备才会生效。
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