DHCP to supply IP address of another subnet

G

Guest

I have a windows 2000 server setup currently as a DHCP server that gives out
IP's for the same subnet that the server is in (DHCP Server IP is
200.0.1.238, Current Scope is 200.0.1.xxx). I want to deactivate that DHCP
Scope and Create a new Scope and have the DHCP server hand out IP's for a
different subnet then the subnet the server is in (DHCP Server IP is
200.0.1.238, New Scope is 10.30.1.xxx). I tried this but had no luck. Should
it work right away or does it take a while for the change to take effect? I
deactivated the new scope and activated the old scope then the windows xp pc
got an ip right away.

What am I doing wrong?
 
R

Richard G. Harper

Either a reboot of the client PCs, or releasing and renewing the IP address
on the client PCs, will be necessary to change the IP address. Yes, you
could wait it out but it would take at least half the lease time specified
in the DHCP server options before all clients would pick up a new IP address
without intervention. It doesn't happen instantaneously.

--
Richard G. Harper [MVP Shell/User] (e-mail address removed)
* NEW! Catch my blog ... http://msmvps.com/blogs/rgharper/
* PLEASE post all messages and replies in the newsgroups
* The Website - http://rgharper.mvps.org/
* HELP us help YOU ... http://www.dts-l.org/goodpost.htm
 
P

Phillip Windell

It hasn't been established that you have configured everything correctly
yet.
Here are some important things:

1. I don't see where you established two separate physical segments that are
properly separated from each other.

2. There needs to be a functioning Router properly positioned between the
two network segments and is verified to properly route between the segments.
This should be tested with machines using static addresses.

3. The Router needs to be configured to pass the DHCP Queries to the segment
the DHCP lives in as a "broadcast",...or cofigure it to send them directly
to the DHCP Server itself. The second one is more dependable.

If you are trying to re-address a lone single segment this way as sort of a
migration project,...it ain't gonna work. You have to first re-address all
the static devices on the LAN,...including the DHCP Server. Then delete the
old Scope and leave only the new one. Then all the DHCP Clients need to be
restarted. There is a way to do it gradually by using Multi-nets, but it
is ugly, messy, and confusing,...it is quicker to just do it as I described
by doing it during off hours.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

The views expressed are my own (as annoying as they are), and not those of
my employer or anyone else associated with me.
-----------------------------------------------------


tstuder said:
Rebooting, releasing, renewing none of these worked.

Any other ideas?

This should work, correct?
--
Tracy Studer
Network Admin
Ajax TOCCO Magnethermic


Richard G. Harper said:
Either a reboot of the client PCs, or releasing and renewing the IP
address
on the client PCs, will be necessary to change the IP address. Yes, you
could wait it out but it would take at least half the lease time
specified
in the DHCP server options before all clients would pick up a new IP
address
without intervention. It doesn't happen instantaneously.

--
Richard G. Harper [MVP Shell/User] (e-mail address removed)
* NEW! Catch my blog ... http://msmvps.com/blogs/rgharper/
* PLEASE post all messages and replies in the newsgroups
* The Website - http://rgharper.mvps.org/
* HELP us help YOU ... http://www.dts-l.org/goodpost.htm


tstuder said:
I have a windows 2000 server setup currently as a DHCP server that gives
out
IP's for the same subnet that the server is in (DHCP Server IP is
200.0.1.238, Current Scope is 200.0.1.xxx). I want to deactivate that
DHCP
Scope and Create a new Scope and have the DHCP server hand out IP's for
a
different subnet then the subnet the server is in (DHCP Server IP is
200.0.1.238, New Scope is 10.30.1.xxx). I tried this but had no luck.
Should
it work right away or does it take a while for the change to take
effect?
I
deactivated the new scope and activated the old scope then the windows
xp
pc
got an ip right away.

What am I doing wrong?
 

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