Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

aironet 1140 not getting DHCP IP

I have set up a wireless network with 3 aironet 1140 and 1 controller 2100. I tested everything in the office with our server acting as the DHCP server and everything was working fine.

I then installed the system at the a client today with a ASA5505 acting as the DHCP server and the APs are not getting an IP if they are connected to the controller. they do get an IP if connected to the ASA though. so this is clearly an using with DHCP but I assigned them with static IP so this is not such a big deal. My real issue is that clients connected to the AP are not getting an IP either :-/

Do I have to configure code 43 on the ASA?

DHCP is not enabled on the controller. I tried doing that but that didn't change anything

any help will be really appreciated


Everyone's tags (4)
New Member

Re: aironet 1140 not getting DHCP IP

You need to configure your WLAN for DHCP relay. I did a quick search and found the following:

Q. How does DHCP work with the WLC?

A. The WLC is designed to act as a DHCP relay agent to the external DHCP server and acts like a DHCP server to the client. This is the sequence of events that occurs:

  1. Generally, WLAN is tied to an interface which is configured with a DHCP server.
  2. When the WLC receives a DHCP request from the client on a WLAN, it relays the request to the DHCP server with its management IP address.
  3. The WLC shows its Virtual IP address, which must be a non-routable address, usually configured as, as the DHCP server to the client.
  4. The WLC forwards the DHCP reply from the DHCP server to the wireless client with its Virtual IP address.

CreatePlease login to create content