LWAPP assocoation with WLC

[vishalpatil86]

hi,

m lwapp cisco 1242ag is not getting associted with wlc.

it is giving following logs in console of AP -

%LWAPP-3-CLIENTEVENTLOG: Performing DNS resolution for CISCO-LWAPP-CONTROLLER
%LWAPP-3-CLIENTERRORLOG: DNS Name Lookup: could not resolve CISCO-LWAPP-CONTROLL
ER

pls help on this.

[Surendra BG]

Hi,

Please make sure you have the DNS Entry for CISCO-LWAPP-CONTROLLER and CISCO-CAPWAP-CONTROLLER in the DNS server..

If we are not using the DNS server, please make sure DHCP option 43 is configured..

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00808714fe.shtml

Here is the link which gives troubleshooting link as well

http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a00808f8599.shtml

Lemme know if this answered your question!!

Regards

Surendra

[dmantill]

Check your DNS or at least if the DHCP is giving the correct DNS where you have that entry configured.

Check if from that network you have access to the DNS and if it can resolve that name.

Regards

[vishalpatil86]

hi,

all other aps are working with the same config.

is anything that i can do from AP side.

WLC is configured correctly.

[Surendra BG]

Please use the below links..

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_tech_note09186a00806c9e51.shtml

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00808714fe.shtml

Regards

Surendra

[dmantill]

http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a00808f8599.shtml

Check that link

What you should try

clear lwapp or capwap private config

clear nvram

If still no go,

MAke sure that DHCP is proving domain name and DNS ip address

If it still does not join, convert it to aIOS and then clear nvram and then convert back again to lightweight using the latest RCVK image or lightweight ios and see if it works

if not try this:

debug lwapp console cli

debug capwap console cli

AP(config)# ip domain name company.com

#

AP(config)# ip name-server 

Let us know how did you go

[josuvarg]

Looks like the AP does not know who is the WLC (it's IP address) and it can't resolve the DNS entry to find it out.

You can statically specify the WLC IP address as well "lwapp ap controller ip address [WLC_IP]"  /   "capwap ap controller ip address [WLC_IP]"

[fbarboza]

Remmeber that to get the aps to join the wlc if the aps have an ip address on the same subnet as the wlc then the aps will get an ip address and send a broadcast request looking for a wlc and since the wlv is on the same subnet it will reply back. Now if the ap get an ip address for s different subnet or vlan then the wlc we need to use a layer 3 discovery method like dhcp option 43 or dns lookup so that once the ap gets an ip address the dhcp server or dns will let know the ap which is the ip address of the wlc so it sends the request to it to join which one are you using ?

As josuvarg mention the ap seems not to know who the wlc is. You can also set the ip address staticaly to the ap and add the ip address of the wlc

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