Our company had a hub and spoke network for years, a single server room supporting 20 remote locations, most using the Citrix farm. We grew and started a second server room. At the second location we have a switch stack of 9 Cisco 3750 10/100 switchws setup with 5 VLANS. previously IP addresses in the new location were provided by a DHCP server in the hub location, a different subnet than is in the new location. We setup a DHCP server that is in one of the five VLANS in the new location and that is when the problem started. Most of the time a system cannot be moved between offices without failing to pick up an IP address if the wall port is a different subnet. For example, if the system was in subnet .65 and is moved to a location where the subnet is .66, the system still picks up the .65 IP address and cannot communicate with anything. We have flushed DNS, deleted leases on the DHCP server. Somehow when renewing the IP address the old address assigned to the system comes back. We believe this may be related to having the DHCP server in one of the subnets, or one of the VLANS being served by this switch stack. It does not haooen 100% of the time but seems to be more than 50%. Any ideas or recommendations as to what might be causing this DHCP address probem?
Serevr 2003 R2 DHCP, Cisaco 3750 switches in a stach
September 15, 2009 3:00 PM
February 10, 2011 10:55 PM