DHCP relay, superscope and laptops

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Hi !

I have a DHCP server serving a few seperate subnets. One subnet, which is
out of the superscope, is the one that the DHCP server is in, all the other
subnets are within the superscope. The other subnets connect through a
Level 3 Switch/Router which acts as a DHCP relay agent.

For most of the time everything works fine, until I have to take my laptop
and connect it to different subnets. My laptop has a fixed IP address,
assigned through DHCP as an indefininite reservation of IP address, on the
"primary" subnet, as there are some firewall filters to handle traffic to it
from both the internet, and the other subnets (for management purposes).

When I connect my laptop to any of the other subnets, which are in the
superscope, I get an IP address.

When I then connect it to the next subnet in the superscope, I don't get an
address via DHCP until I delete the assignment from the first subnet.

What I most would like to do is to manually reserve indefinitely one IP
address for my laptop in each subnet, which would be allocated via DHCP when
I connect to that subnet. That way I could set up some filter exceptions
that would only work for that IP address.

Thus, there are two questions:

1. How can I get this fixed IP address in each subnet to be allocated to my
laptop ?

2. How can I get an IP address allocated each time I connect to a subnet
without having to manually delete the first reservation?

Regards,
Palli



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