Solved: Multiple AIR-AP2802I-A-K9 access points flickering the LED

rakesh nair · ‎12-01-2022

We got 6 AIR-AP2802I-A-K9 APs connected to same module of the switch is having LEDs flickering, but all are showing as registered in WLC and there is no logs in the switch also. But AP is not working for clients.

What could be the possible reasons . APs are getting POE from switch and it is showing good

Interface Admin Oper Power Device Class Max

Gi2/0/4 auto on 26.1 AIR-AP2802I-A-K9 0 60.0
Gi2/0/5 auto on 26.1 AIR-AP2802I-A-K9 4 60.0
Gi2/0/7 auto on 26.1 AIR-AP2802I-A-K9 4 60.0

Leo Laohoo · ‎12-03-2022

@Arshad Safrulla wrote:

1. Faulty cabling - You can start with TDR test. I would also check the patch panels and face plates to make sure that the cables are connected properly. you may thank @Leo Laohoo for this article How to use Time-Domain Reflectometer (TDR) - Cisco Community

Any switch on IOS-XE, particularly running 16.X.X and 17.X.X, TDR is broken. Any test results are no longer accurate nor reliable.

(Above) Pair "A" distance is (significantly) more than Pairs B, C and D.

(Above) Pair A & B distance is "0".

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marce1000 · ‎12-04-2022

># sh cdp nei Gig 2/0/7 det
>....Power drawn: 15.400 Watts

- That seems incorrect (indeed) needs 16W or above , I also notice : Cisco AP Software, ap3g3-k9w8 Version: 8.5.137.98 , I would advise to upgrade the controller , check https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/200046-tac-recommended-aireos.html , which will also upgrade (or sync) the access point software. Check if the problem remains in place or not.

M.

-- ' 'Good body every evening' ' this sentence was once spotted on a logo at the entrance of a Weight Watchers Club !

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Rich R · ‎12-04-2022

Agreed with a number of other comments - you're running old, special code so should be running an up to date supported release for a start.

But regardless of that: "Also when connect the same AP into a different switch module it worked ,but not on this module"

Therefore the problem is the switch - check your switch port configurations. If the configs are correct and you haven't changed anything else on the switch then you probably have a hardware failure so open a TAC case and RMA the switch.

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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.
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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
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 8.10.190.0, latest 9800 releases, 8.5.182.11 (8.5 mainline) and 8.5.182.108 (8.5 IRCM)
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

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Leo Laohoo · ‎12-01-2022

What firmware is the WLC on?

rakesh nair · ‎12-02-2022

AIR-CT8510-K9 WLC with firmware 8.5.137.98

Leo Laohoo · ‎12-02-2022

I am not able to provide any assistance because the WLC is on a very old engineering "special" release.

I would, however, recommend to a later release, like 8.5MR6 or something.

marce1000 · ‎12-02-2022

- Reboot one of these access points and just after boot , connect to it and issue the command show logging , watch for issues reported.

M.

-- ' 'Good body every evening' ' this sentence was once spotted on a logo at the entrance of a Weight Watchers Club !

rakesh nair · ‎12-02-2022

Is there any way to remote access the AP ip from switch other than console

Leo Laohoo · ‎12-02-2022

Telnet or SSH

rakesh nair · ‎12-02-2022

I tried, its not happening.

T1-EBS008-N5-NXDS-200-111# telnet 10.25.210.228 23 source 10.25.210.2 vrf CAN-WIRELESS
Trying 10.25.210.228...

Leo Laohoo · ‎12-02-2022

By default, telnet and SSH access to the AP is disabled.

rakesh nair · ‎12-02-2022

So the only option is to console to the AP directly

Leo Laohoo · ‎12-02-2022

@rakesh nair wrote:

So the only option is to console to the AP directly

No. That is not what I said.

By default, telnet and SSH access to the AP is disabled.

HINT: Look at the controller. Monitor > All APs > Detail > click the AP > Go to the Advanced Tab.

rakesh nair · ‎12-02-2022

Also when connect the same AP into a different switch module it worked ,but not on this module

rakesh nair · ‎12-02-2022

Leo Laohoo · ‎12-02-2022

What happens if telnet or SSH box is ticked?

rakesh nair · ‎12-02-2022

Post enabling telnet and SSH , telnet is not working , but ssh is working, but not able to see anything