Cisco AIR-CT8510-K9 Ping Loss Over 30-70%

Saran Komgris · ‎12-18-2023

I know that this device is EoL already. Unfortunately, I just assigned to support with new customer using WLC 8510 with version 8.5.182.7.

Anyone used to faced the ping loss behavior? As I got the message, no configuring changes, but just a reboot by itself. There are many WLCs connected uplink to the same switch. Layer 1 is working fine, no CRC, no transceiver issue, other WLC not faced this issue(same network, same configuration). Please help

marce1000 · ‎12-18-2023

- Check the logs on WLC5 and or configure a syslog server on it , (follow up on logging) ; you may try another port on the particular switch too ,

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

Scott Fella · ‎12-18-2023

So this happened after a reboot? Were the configs saved before the reboot? Reboot it again and ping the address to make sure there is no other device using that same address. Other than that, check out what @marce1000 posted also.

-Scott
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Rich R · ‎12-18-2023

Never seen that before. We still have some 8510's which we plan to turn off within the next few months.
Also upgrade to 8.5.182.11 (link below) just to make sure you have all the latest bug fixes. Did you check the interface stats on both sides - WLC & switch?
That kind of problem can sometimes also indicate a failing SFP so you could try replacing SFPs on both sides.

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TAC recommended codes for AireOS WLC's and TAC recommended codes for 9800 WLC's
Best Practices for AireOS WLC's, Best Practices for 9800 WLC's and Cisco Wireless compatibility matrix
Check your 9800 WLC config with Wireless Config Analyzer using "show tech wireless" output or "config paging disable" then "show run-config" output on AireOS and use Wireless Debug Analyzer to analyze your WLC client debugs
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Leo's list of bugs affecting 2800/3800/4800/1560 APs
Default AP console baud rate from 17.12.x is 115200 - introduced by CSCwe88390

Saran Komgris · ‎12-19-2023

Thank you. I have not heard about 8.5.182.11 before. I will try with this version. I am 100% sure there is no layer 1 issue and also try on new switch's interfaces.