I am hoping someone can point me in the correct direction. Two days in a row, our wireless controllers (4404 and wism2) have stopped sending the DHCP requests for clients for just one of our WLAN. This WLAN is open and is used as the Multicast VLAN for our two 802.1X WLANs.
Recent Changes: 1. Tuesday morning, we replaced our ISC DHCP servers with Infoblox. 2. As part of that change, we had to change the dhcp server settings on all of the dynamic interfaces. In classic mode of Prime, you are not allowed to enter just one dhcp address. So, on the controllers themselves, I manually updated the list of dhcp servers for all of the dynamic interfaces except the open one, ias-144. I was not allowed to change the dhcp settings on ias-144 because it was in use. As we were getting near the end of our window, I setup the dhcp override in the corresponding WLAN. (I later remembered it was "in use" as the Multicast VLAN.)) 3. Wednesday, about 25 hours after the dhcp server change, clients were unable to get an ip address. We "fixed" this issue by disabling the WLAN, removing it as the Multicast VLAN, and replacing its dynamic interface using a Prime's Lifecycle Theme template. 4. Today at 13:21, the problem reoccurred. I removed the dhcp override option as it was no longer needed. That didn't help. We then disabled and re-enabled the WLAN. After doing so, clients were able to get their dhcp addresses. Has anyone else seen this behavior? The ip helper-address is the same for all of the WLANs on the 6509 and on the controllers. All of the dynamic interfaces look the same on the controllers. Thank you for your help, -- Christina Klam Network Engineer Institute for Advanced Study Email: ck...@ias.edu Einstein Drive Telephone: 609-734-8154 Princeton, NJ 08540 Fax: 609-951-4418 ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
