WLC Option 43

[kuldeep.kaur]

Hi Guys,

I have a Cisco 5508 and I have option 43 specified but the access points cant connect to WLC. The ip address of the controller is 10.1.92.58 and the hex I put under DHCP scope is f104.0a01.5c3a. Is the conversion of the hex correct ? Also is it possible to specify ip address under option 43 instead of hex ?

Also if I have two controllers how can i specify two hex entries.

Thanks 

Rgds

[Scott Fella]

That is correct, but you would not include the decimal. For two controller entry, it would be f108 and both controllers combined. This link shows it a few ways.

http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/97066-dhcp-option-43-00.html#anc7

-Scott

[kuldeep.kaur]

Hi Scott,

Thanks for the reply. Forgot to mention but I have tried with decimal and without decimal and the access points are not able to connect to wlc. Any ideas ?

Thanks

[Scott Fella · Accepted solution]

I do t know your setup, but the easiest way to have the ap join and to see if there are issues is to place the ap on the same subnet as the WLC. If this is not possible then what I would do is on the layer 3 switch at the site he access point is located, globally configure:

ip forward-protocol udp 5246

ip forward-protocol udp 5247

then on the layer 3 interface that the AP is connect on create an ip helper-address <WLC management ip>

this is what I use as I hate having to troubleshoot option 43. The other option I would use is DNS entry to resolve Cisco-capwap-controller to the WLC IP address.

-Scott