Solved: Problems with 2800 APs on 8.10.181.0

f0rslund · ‎10-27-2022

Hello!

Yesterday we updated our Cisco 8540 WLC to 8.10.181.0,

Now we are experiencing trouble with all our Cisco 2802 AP's. The problem we are seeing is very slow down speeds on personal devices connected to the accesspoints while the up speed seems fine when testing. Some sites also seems to work flawless while others don't.

We also have 2700, 1800, 9120 and 9105 AP's on the same WLC which all seems to works fine.

Anyone have any ideas?

marce1000 · ‎10-27-2022

- FYI : https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw52888

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! '

View solution in original post

Leo Laohoo · ‎10-27-2022

The fix may be to change the TCP MSS to 1250 but it is not CSCvw52888.

This is, in fact, CSCwd37092.

I know of this because I have a TAC Case with this exact behaviour.

View solution in original post

marce1000 · ‎10-27-2022

- FYI : https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw52888

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! '

f0rslund · ‎10-27-2022

The solution described in this did the trick, thank you very much @marce1000!

Arshad Safrulla · ‎10-27-2022

Is this impacting one particular client or similar client group? If yes, did you try upgrading the drivers?

How did you measure the performance to conclude that downloads are slow?

How was the RF environment of these APs which was causing this issue?

Was the client connected to slot 0 or slot 1 of the AP? (2.4 or 5Ghz)

Do you have FRA enabled? Did you check the radio status of the APs?

___________________________________________
TAC recommended codes for AireOS WLC's
Best Practices for AireOS WLC's
TAC recommended codes for 9800 WLC's
Best Practices for 9800 WLC's
Cisco Wireless compatibility matrix
___________________________________________
Arshad Safrulla

Leo Laohoo · ‎10-27-2022

The fix may be to change the TCP MSS to 1250 but it is not CSCvw52888.

This is, in fact, CSCwd37092.

I know of this because I have a TAC Case with this exact behaviour.

Rich R · ‎10-27-2022

Yep @Leo Laohoo is correct of course.
I added the info into my signature as a warning so you'll see it on any of my posts.
At my request TAC have also added a warning to https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/200046-tac-recommended-aireos.html#anc4 now - not sure why they didn't do that as soon as it was confirmed.

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Please click Helpful if this post helped you and Select as Solution (drop down menu at top right of this reply) if this answered your query.
------------------------------
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
Field Notice: FN63942 APs and WLCs Fail to Create CAPWAP Connections Due to Certificate Expiration
Field Notice: FN72424 Later Versions of WiFi 6 APs Fail to Join WLC - Software Upgrade Required
Field Notice: FN72524 IOS APs stuck in downloading state after 4 Dec 2022 due to Certificate Expired
- Fixed in 8.10.196.0, latest 9800 releases, 8.5.182.12 (8.5.182.13 for 3504) and 8.5.182.109 (IRCM, 8.5.182.111 for 3504)
Field Notice: FN70479 AP Fails to Join or Joins with 1 Radio due to Country Mismatch, RMA needed
How to avoid boot loop due to corrupted image on Wave 2 and Catalyst 11ax Access Points (CSCvx32806)
Field Notice: FN74035 - Wave2 APs DFS May Not Detect Radar After Channel Availability Check Time
Leo's list of bugs affecting 2800/3800/4800/1560 APs

Leo Laohoo · ‎10-31-2022

A re-build version of 8.10.181.0, to fix the slow speed for the affected APs (2800/3800/4800/1562/6300), will be released in the next 48 hours.

This re-build will NOT fix the issue with failed EAP authentication due to oversized certificates.

marce1000 · ‎10-31-2022

- I suppose it will get a new suffix version-ending number to denote the fix ?

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! '

Leo Laohoo · ‎11-01-2022

I think the re-build will be 8.10.181.3.

Rich R · ‎10-31-2022

So not really a fix then?

------------------------------
Please click Helpful if this post helped you and Select as Solution (drop down menu at top right of this reply) if this answered your query.
------------------------------
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
Field Notice: FN63942 APs and WLCs Fail to Create CAPWAP Connections Due to Certificate Expiration
Field Notice: FN72424 Later Versions of WiFi 6 APs Fail to Join WLC - Software Upgrade Required
Field Notice: FN72524 IOS APs stuck in downloading state after 4 Dec 2022 due to Certificate Expired
- Fixed in 8.10.196.0, latest 9800 releases, 8.5.182.12 (8.5.182.13 for 3504) and 8.5.182.109 (IRCM, 8.5.182.111 for 3504)
Field Notice: FN70479 AP Fails to Join or Joins with 1 Radio due to Country Mismatch, RMA needed
How to avoid boot loop due to corrupted image on Wave 2 and Catalyst 11ax Access Points (CSCvx32806)
Field Notice: FN74035 - Wave2 APs DFS May Not Detect Radar After Channel Availability Check Time
Leo's list of bugs affecting 2800/3800/4800/1560 APs

Leo Laohoo · ‎11-01-2022

Yes and no.

Fixes the slow WiFi speed but will not fix the issue with failed EAP authentication due to oversized certificates.

But I could be wrong.

Leo Laohoo · ‎11-02-2022

Re-build version 8.10.181.3 is now out. ~~Special download link provided by TAC.~~

AireOS 8.10MR8 Escalation Special

Leo Laohoo · ‎12-04-2022

8.10.182.0 is now out.