Re: DHCP relay, superscope and laptops

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"Pall Bjornsson" <palli@xxxxxxx> wrote in message
news:#cFudKZVFHA.1508@xxxxxxxxxxxxxxxxxxxxxxx
> OK, so to simplify...
>
> I have two subnets A and B, one on each VLAN, connected through a L3
switch
> which acts as a DHCP relay to my single DHCP server on subnet A.
>
> A DHCP request from clients on subnet A are no problem as they are local
on
> the DHCP's server subnet.
>
> A DHCP request from clients on subnet B, pass through the L3 Switch, which
> relays them to my DHCP server on subnet A.
>
> How do I then set up those two subents on the DHCP server? Do I just have
to
> seperate scopes and everyone is happy ever after ?

Yes. In DHCP a scope is (effectively) a subnet.

Technically, a scope supplies some portion of the addresses
to a single subnet.

> In the article I read then I needed to declare a superscope for subnet B
for
> the DHCP server to be able to handle it correctly. Is that not the case ?

No.

A superscope would only be necessary if there were two logical
subnes on the single physical VLAN-B (etc.) -- each subnet would
require a scope, but since they are on the same VLAN (same broadcast
domain) they would need to be combined into a superscope.

Your situation is PRECISELY equivalent to the admin with a router
separating two subnets (in regards to DHCP, relaying, and scopes.)

Your VLAN switch just sets up the two broadcast domains electrically
instead of directly physically.



.

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