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

rakesh nair
Beginner
Beginner

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

 

 

3 Accepted Solutions

Accepted Solutions


@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" distance is (significantly) more than Pairs B, C and D.

 

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

 

View solution in original post

 

                                     ># 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.

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Rich R
VIP Advisor VIP Advisor
VIP Advisor

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.

___________________________________________
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
Field Notice: FN-72424 Later Versions of WiFi 6 APs Fail to Join WLC - Software Upgrade Recommended
WARNING - see CSCwd37092 Throughput degraded after upgrading to code 8.10.181.0/17.3.6 - 2800/3800/4800 series
- The fix for CSCwd37092 is now released in 8.10.183.0 and
- For IOS-XE 17.3.6 select controller model, go to IOS XE Software AP Service Pack, select CSCwd40096 17.3.6 APSP2
Field Notice: FN-63942 Lightweight APs and WLCs Fail to Create CAPWAP Connections Due to Certificate
                      Expiration - Software Upgrade Recommended
Field Notice: FN-72524 - During Software Upgrade/Downgrade IOS APs Might Remain in Downloading State
                     After 4 Dec 2022 Due to Certificate Expiration - Fixed in 8.10.183.0 and 17.3.6 APSP5 (APSP_CSCwd83653)
                     Also fixed in 8.5.182.7 (8.5 mainline) and 8.5.182.105 (8.5 IRCM) if you can't upgrade to 8.10
                     Note that 8.10.181.0 and 8.10.182.0 have been deferred (withdrawn) and are effectively unsupported by Cisco
___________________________________________
Richard R

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45 Replies 45

Leo Laohoo
VIP Community Legend VIP Community Legend
VIP Community Legend

What firmware is the WLC on?

rakesh nair
Beginner
Beginner

AIR-CT8510-K9 WLC with firmware 8.5.137.98

Leo Laohoo
VIP Community Legend VIP Community Legend
VIP Community Legend

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
VIP Mentor VIP Mentor
VIP Mentor

 

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

 M.

rakesh nair
Beginner
Beginner

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

Leo Laohoo
VIP Community Legend VIP Community Legend
VIP Community Legend

Telnet or SSH

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
VIP Community Legend VIP Community Legend
VIP Community Legend

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

So the only option is to console to the AP directly

Leo Laohoo
VIP Community Legend VIP Community Legend
VIP Community Legend

@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
Beginner
Beginner

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

rakesh nair
Beginner
Beginner

rakeshnair_0-1669983909733.png

 

Leo Laohoo
VIP Community Legend VIP Community Legend
VIP Community Legend

What happens if telnet or SSH box is ticked?

rakesh nair
Beginner
Beginner

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

rakeshnair_0-1669993298575.png

 

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