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AIR-AP3802E-B-K9 unable to join the wireless controller

ugwuugochukwuk
Beginner
Beginner

Hello All,

 

I have an ap model of AIR-AP3802E-B-K9 which cannot join the WLC, I have performed reset on the AP and yet it does not join the controller. It picks an IP address but registering to the WLC is the issue.

 

I have attached the log from the AP.

 

Thanks in anticipation!!!

9 Replies 9

Flavio Miranda
Advisor
Advisor

You problem is this:

 

"Max retransmission count exceeded, going back to DISCOVER mode."

This can be recheability problem. Make sure links is Ok.

Hello Flavio,

 

The link is OK

jagan.chowdam
Participant
Participant

Also, Can you share

1. WLC: sh sysinfo;
2. WLC: sh time;

 

Verify

  • Country Code is accurate
  • NTP is configured

Put the AP on the same VLAN as WLC and check

 

CJ

/**Please rate useful responses**/

 

 

patoberli
VIP Advisor VIP Advisor
VIP Advisor

The -B AP variant is a bit newer than the -A variant, both are for Americas (I think North America only). So which software release is running on the WLC?

Hello Patoberli,

 

The WLC runs software version 8.5.140.0.

 

Regards,

Rich R
VIP Advisor VIP Advisor
VIP Advisor
CAPWAP detected next hop MAC changed from 0007.B400.0E01 to 0007.B400.0E02

Unstable WAN link switching between primary and backup routers maybe, or duplicate IP configured? 

___________________________________________
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

Hello rrudling,

 

The WAN link is stable, More than 3 Access points have registered with the controller since then. I don't think it's a WAN link issue.

 

Thanks 

Well then why is the AP detecting the next hop MAC address changing?

___________________________________________
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

What is the Controller model? 

Did you set the dhcp option 43 correctly with the WLC IP?

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