We've got a problem with our network here but first I'll give a bit of background info:
DHCP running on a windows server 2000 box is configured to hand out 2 IP Ranges 10.25.104.xxx and 10.25.106.xxx The network infrastructure runs on a Cisco Catalyst 4506 of which are linked via fibre. The network team has configured 1 of the 4506's to only allow 10.25.104.xxx traffic and the other 4506 to only allow 10.25.106.xxx traffic.
Everything works fine apart from when you wish to move a PC/laptop from one end of the building to the other. Then the IP isn't released or renewed as DHCP constantly trys to give it the same IP again that won't work on the other VLAN (lease times have been set to minimums but still no use).
What we really want to allow is for users that move around and presentation laptops to be able to obtain an IP that works with both IP ranges on either of the 4506's.
Does anyone know why this happens? is it the way DHCP is configured? or is it the 4506 and the way it has been configured? Is it to do with VLANs? Can more than 1 vlan be setup(or have access) on 1 port?
Sorry for all the questions, dont know that much about VLANs and the like - any help much appreciated!