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VLANs and laptop users

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by john.adegoke

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We have a 2 VLAN set up with separate clas C addresses. One DHCP server on VLAN 2 with a IP helper address configured. The problem is whenever a laptop user moves from VLAN 1 to VLAN 2 we have to release/renew it's IP address. This works. But when auser moves from VLAN 2 to VLAN 1 release/renew does not work and the user can't get a valid address.
How do I solve this?

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by sixfourtykilo

Here are some brainstorming ideas to try:

1. Not Likely: Your switch that houses vlan 1 may not allow broadcasts. Check to see if this has somehow been changed. But then again, no one would be getting IP?

2. Maybe: If you are running an NT network and you have servers on vlan 1, install a relay agent (networking service).

3. The Basics: check to ensure that you haven't maxed out your IP range for vlan 1. See if you need or can bump it up 20 to 50 addressess.

4. Most Obvious: Maybe even check the laptops drivers. Reinstall them, get the latest drivers, etc.

I thought for a moment I could be of more help than this, but I posted my thoughts anyway.

GOOD LUCK!
640k!

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