Cisco 8540 - Catalyst Campus Switch Router Modular Expansion Base Manual de resolução de problemas - Página 15
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show imm chassis sol-info
When Serial-Over-LAN is enabled all external consoles will be disabled.
Note
APs not joining with and displays certificate Error / Certificates not found
Solution
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Show certificate all
The above command shows the certificates present/installed and status
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If we remove the SDcard while WLC is powered on, it will get disconnected and cannot be accessed in
subsequent boots as well.
Check if Serial-over-LAN is disabled in CIMC
Get the status of this from the Telnet/SSH to controller using
Check if the certificates are installed and not certificate errors were seen during bootup
Check if the FlexFlash is present in the SDcard panel in UCS
Check if the Flexflash is connected to HOST
Cisco 5520 and 8540 Wireless Controller Troubleshooting Guide
Troubleshooting
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