Cisco 1200 APs with Leap and DHCP

[bkuner]

We are installing Cisco 1200 APs with 802.11b radios. We are using Leap for authentication and that is working fine. We are having some flaky results with getting DHCP addresses. We have the latest driver and firmware for the Cisco 350 Client adapter. The os is Windows 2000. Any help on where to start is appreciated.

Thanks,

Brian Kuner
Manager, Network planning and Operations
Chilren's Hospital Medical Center of Akron

 

[TreyJ]

Are the 1200's VXWorks or IOS? We had some issues with DHCP addresses, but it was mainly with PDAs. Once we upgraded our access points to IOS, the problem disappeared. I think there was a time-out issue with the DHCP server versus the authentication server. We aren't using LEAP though.

 

[bkuner]

We are running VXworks and are on version 12.02T1. I was also having problems with PDAs with DHCP and upgrading to 2.10 of Pocket PC resolved that. I have some sniffer traces now that have me somewhat confused. We have multiple VLANS and the laptops were originally configured on the Management VLAN and were moved to the LEAP vlan. When the PC requests an address the DHCP OFFER packet is being sent to the IP address that the device had on the Management vlan. That device is not there so the DHCP REQUEST and DHCP OFFER keep repeating. I did some ARP cache flushes and that does not seem to help the problem. The strange thing is there are times I can switch from one vlan to another without problems. Five minutes I can try again and it does not get an address.