topic Re: Lwapp discovery request rejected in Wireless

Lwapp discovery request rejected

sri_ramg23 — Mon, 05 Jul 2021 16:55:19 GMT

Hi,

while i am trying to reconnect the Accesspoints getting below error message on APJoin in WLC2500series....

Lwapp discovery request rejected.

Discovery request decoding with subnet broadcast and wrong AP IP address

please help me out with steps need to fix this issue.

WLC is on 192.168.0.0 series and APs are in 192.168.3.0 series and trying to communicate with VLAN port in trunk mode

WLC connected on default VLAN and APs are connected on VLAN Trunk.

please help me out in this.

thanks

sriram

Re: Lwapp discovery request rejected

Mark Elsen — Fri, 22 Feb 2019 10:38:38 GMT

- Check wether any of the hints of this thread can help you :

https://community.cisco.com/t5/wireless-security-and-network/ap-1231g-cannot-register-to-wlc/td-p/2355844

Re: Lwapp discovery request rejected

Sandeep Choudhary — Fri, 22 Feb 2019 11:48:19 GMT

paste these info:

From WLC: sh sysinfo

From AP: sh version

From Switch: Switch port config where AP and WLC are connected.

Logs from AP console: Complete bootup process from AP console

Re: Lwapp discovery request rejected

Leo Laohoo — Sat, 23 Feb 2019 13:01:17 GMT

Post the complete output to the following commands:
1. WLC: sh sysinfo;
2. WLC: sh time;
3. AP: sh ip interface brief; and
4. AP: sh version

Re: Lwapp discovery request rejected

Scott Fella — Sat, 23 Feb 2019 14:11:02 GMT

Easiest way is to put the AP on the same subnet as the wlc management. If everything is okay, dhcp, controller code version, time, country code, etc., the AP should join the wlc. Once joined, the AP will know the controller IP address and you can then place the AP in any subnet that has connectivity to the wlc and the AP will join back up.

If your AP doesn’t join when on the same subnet, the info the others requested is valuable to investigate further.

Re: Lwapp discovery request rejected

Haydn Andrews — Mon, 25 Feb 2019 02:40:39 GMT

If the AP and WLC are on different subnets you need to tell the AP about the WLC via different methods:

DHCP Option 43

DNS

Static Mappings

The VLAN the AP is on also needs to be allowed to communicate to the WLC so check you don't have any ACLs/ Firewalls in the way that may be blocking it.

Have a look at this blog post for methods the AP uses to join a controller:

https://mrncciew.com/2013/03/17/ap-registration/