Light weight AP cannot Get IP from windows DHCP server

Unanswered Question
Nov 27th, 2008

Hi all :

We user WISM ver.5.0.148.2 , All AP is 1230 Series and Use Windows 2003 DHCP server.All AP cannot get IP after upgraded Lightweight from Autonomous IOS.

But I found the DHCP is work if i use my notebook connect the same switch port and my notebook can get IP from DHCP server.

Anyone can tell me why MY Lightweight AP cannot get IP from DHCP server ???

thx any idea .

I confirm the AP DHCP setting enabled and the config as below :

AP000d.bc41.4392#show ip inter bri

Interface IP-Address OK? Method Status Protocol

FastEthernet0 unassigned YES DHCP up up

I have this problem too.
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Scott Fella Fri, 11/28/2008 - 07:20

Console into the ap and see what the log shows. Post that so we can see it also.

tkhan Mon, 12/01/2008 - 12:03

The AP may already have a static IP on it. Reset the AP by pushing in the reset button.

samuelwai Mon, 12/01/2008 - 17:38

hi tkhan:

thx your idea ,I check it the AP didn't have static IP and the DHCP Protocol enabled already.

Scott Fella Mon, 12/01/2008 - 18:35

When you converted the ap's, did you also enter the SSC information on the WLC? How do you have the switchport the ap is connected to configured?

tkhan Mon, 12/01/2008 - 19:22

Try enabling "spanning-tree portfast" on the switchport or issue "switchport host" on the switchport.

samuelwai Mon, 12/01/2008 - 22:29

hi fella5:

yes , it's done , the WLC already have the SSC Code and i verify the SCC code is correctly.

the Switchport configured that vlan 99 access port and the Global Vlan ID set the IP helper to the DHCP already.I can ping to the DHCP , DNS and WLC.

Scott Fella Tue, 12/02/2008 - 06:12

Is vlan 99 trunking all the way to the layer 3 device? Try putting the ap on a user vlan on the same switch.

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