Users unable to connect with an AP SSID WLC9800L install on VM

[hamza-ali]

Hi Team,

I have an WLC9800L install on VM..My AP 3802 is discovered into it and also SSID is broadcast but my end user is unable to connect with this SSID.

Note: All devices like WLC9800L install on vm and AP in same vlan..and use will also get the IP from same vlan.

WLC to Switch configurations::


interface GigabitEthernet4/0/15
description "0.136-vmnic3"
switchport trunk encapsulation dot1q
switchport mode trunk
spanning-tree portfast



AP to switch configuration:
switchport access vlan 91
switchport trunk native vlan 91
switchport trunk allowed vlan 91
switchport mode trunk
spanning-tree portfast disable
Please suggest

[MHM Cisco World]

switchport trunk allowed vlan 91 <<- remove this and check

MHM

[hamza-ali]

FROM AP to switch configuration:
switchport access vlan 91
switchport trunk native vlan 91
switchport trunk allowed vlan 91
switchport mode trunk
spanning-tree portfast disable
 

So what configuration i need to do...
from AP to switch.. My AP will also get an IP from Vlan91 so please 

[MHM Cisco World]

If AP is flex

FROM AP to switch configuration:
switchport trunk native vlan 91
switchport mode trunk
spanning-tree portfast disable

MHM

[hamza-ali]

My AP in local mode ...i still try that my end user will get an IP.. 

[hamza-ali]

Please guide what i need to do

[hamza-ali]

IS anyone please guide me what do i do ?

[Mark Elsen]

  - @hamza-ali  Validate the configuration of your WLC9800L controller configuration using the CLI command 
                         show tech wireless and feed the output from that into Wireless Config Analyzer
                         Any fatal errors for the basic controller (wlc_results tab in resulting Excell must be corrected!)
   
  M.

[aolguin]

Hello @hamza-ali,

I think you need to be more clear when you said your client is not connecting. 

What authentication are you using? 

Do you see the client on the WLC at all? 

is client not getting an IP Address?

I would advice to attach a full configuration of the WLC + collect the always on logs from the client while trying to connect. So, we are in a better position to help. 

Here the command you can use to collect this logs:

Troubleshoot Catalyst 9800 Wireless LAN Controllers - Cisco

Regards,

Aaron 

[Rich R]

> I have an WLC9800L install on VM
9800-L is a hardware WLC appliance.
If you are running the WLC as a VM then you must be using 9800-CL (Catalyst 9800-CL Wireless Controller for Cloud)

Having everything (WLC, AP and clients) on the same VLAN is a very questionable design.  There are a number of things which may not work that way.

As @Mark Elsen said - use the Config Analyzer to validate your WLC config as a starting point.  

Make sure the WLAN configuration is compatible with the client and client has latest OS and drivers installed.