12-24-2020 07:31 AM - edited 07-05-2021 12:56 PM
Hi everyone
I have some cisco Aironet 2800. i joined this access point to vWLC version 8.10.130. but after while they disconnected from wlc randomly. in first i check network connection between AP and WLC everything is ok, while access point disconnected from WLC they can ping each other. (WLC and AP are in same subnet)
this is access point log when disconnected from WLC, I think a problem about receiving data keepalive.
Solved! Go to Solution.
01-26-2021 05:43 AM
Hi Guys
Finally i can find problem, the core switch of my customer have problem with ARP table and lost ARP entries, This issue caused Keep-alive drop and capwap restarted. for temporary, I configure IP SLA on core switch to ping controller and access points for hold ARP entries until find root problem in core switch.
12-24-2020 07:40 AM
12-24-2020 07:46 AM
this is a new setup and i checked this Items:
- Network connections
- Time and NTP
- Country and regularity
- license status
everything is ok!
12-24-2020 08:03 AM
- Check if you have this command : test ap unencrypted-data-keepalive disable ? ,if so use it on the ap involved as a test
M.
12-24-2020 11:34 PM
This command must run on AP or WLC ?
12-24-2020 11:55 PM
- WLC
M.
01-24-2021 07:04 AM
I try this command on WLC but problem still exist
12-26-2020 01:35 PM
I have seen similar messages in my lab, when WLC IP was duplicated, but not the code you are running though.
01-24-2021 07:05 AM
thank for your advice, i check network and no duplicated address exist.
01-25-2021 05:06 AM
Is this a LAN or WAN link? There was an issue in 8.10.130.0 with DTLS encrypted traffic over a WAN link. In that case you need to disable DTLS encryption for that AP. It's fixed in 8.10.142.0.
The error message in my case was a bit different though.
01-26-2021 05:43 AM
Hi Guys
Finally i can find problem, the core switch of my customer have problem with ARP table and lost ARP entries, This issue caused Keep-alive drop and capwap restarted. for temporary, I configure IP SLA on core switch to ping controller and access points for hold ARP entries until find root problem in core switch.
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