标签:ack air 显示 syslog *** rod available ESS products
实际的无线网络中,有时候由于对无线设备的datasheet不是很了解,可能会以旧的知识去判断一些故障。在思科的较新的AP型号中:例如AP2800&AP3800等,有时候发现它们可正常的注册到WLC,但是就是无法搜到它们发出的SSID。这可能的情况是由于电源注入器型号不匹配,或者是AP所连接的PoE交换机的供电不足以让其正常工作。
我们可以通过datasheet去查询:
https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-2800-series-access-points/datasheet-c78-736497.html?cachemode=refresh Input power requirements
● 802.3at PoE+, Cisco Universal PoE (Cisco UPOE(r))
● 802.3at power injector (AIR-PWRINJ6=)
一般不匹配供电条件,可能就会导致AP无法放出SSID。
故障示例:
故障描述:
一个AP2802型号的AP,正常注册到AIR-CT5520-K9的设备上,但是无法放出SSID。
采集信息:
On WLC:
>config paging disable
>show run-config
>show msglog
>show traplog
>show tech-support
>config paging enable
On AP:
#show tech
#show log
#show control dot11radio 1
日志分析:
Logs:
Jan 8 12:15:36 brain: Power mode: Degraded/Reduced Power, power_detection: DC_adapter(FALSE), 802.3AF_POE(TRUE)
Jan 8 12:15:41 brain: Restart POE negotiation Jan 8 12:15:46 brain: CDP PoE negotiation START
Jan 8 12:15:46 brain: CDP PoE negotiation FAILED !!
Jan 8 12:15:46 brain: LLDP PoE negotiation START
Jan 8 12:16:25 syslog: +ifconfig wired0 promisc
Jan 8 12:16:30 brain: LLDP PoE negotiation FAILED !!
***** show lldp inline_power *****
Power_Requested(mW) Power_Available(mW) Port_ID
Negotiation-failed Negotiation-failed
操作建议:
日志显示当前AP和PoE交换机协商在PoE而并非PoE+,而AP 2802需要PoE+的供电才能正常工作,详见以下AP 2802的datasheet link:
https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-2800-series-access-points/datasheet-c78-736497.html?cachemode=refresh Input power requirements
● 802.3at PoE+, Cisco Universal PoE (Cisco UPOE(r))
● 802.3at power injector (AIR-PWRINJ6=)
建议更换支持PoE+的交换机或者 power injector来给AP2802供电来解决这个问题。
标签:ack air 显示 syslog *** rod available ESS products
原文地址:https://www.cnblogs.com/MomentsLee/p/10307023.html