DHCP server on different network

[EN]

I have two networks
192.168.1.x
and
10.0.0.x

I want the DHCP server to be on the 10.0.0.x network.
I have no routers, but am using windows 2003 server as domain controllers.
I can have a computer that doesn't have an ip that is set to DHCP contact
the
DHCP server fine, since it's doing a broadcast call to 0.0.0.0, but when I
have a
computer that already has a 192.168.0.x IP, and do an ipconfig /renew, the
DHCP
can't be contacted. I'm figuring because it can't see the other network.
I've been coming
across this error as well when computers lose their lease and they can't
obtain their ip again.

Is there something I'm doing wrong, or do I need to set up RRAS, and if so,
what's the best
way to do this. Is there a tutorial on it that will address my case, or
something similar?

Thanks

 

[John Wunderlich]

I want the DHCP server to be on the 10.0.0.x network. I have no
routers, but am using windows 2003 server as domain controllers. I
can have a computer that doesn't have an ip that is set to DHCP
contact the DHCP server fine, since it's doing a broadcast call to
0.0.0.0, but when I have a computer that already has a 192.168.0.x
IP, and do an ipconfig /renew, the DHCP can't be contacted. I'm
figuring because it can't see the other network.

Assuming the computer is configured for DHCP and not manually set,
try giving it a "ipconfig /release" before the "ipconfig /renew"

I've been coming across this error as well when computers lose
their lease and they can't obtain their ip again.

The initial lease is obtained at a low level. Renewing the lease
requires the use of ports 67 & 68. Check your machines for
firewalls that might be blocking these ports.

HTH,
John

 

[Phillip Windell]

I have two networks
192.168.1.x
and
10.0.0.x
I have no routers, but am using windows 2003 server as domain controllers.

You can't have two networks without a LAN Router between them.

If the two networks are supposed to be separated and never see each
other,...then create the Scope for the Second Network on the DHCP Server and
install a second Nic in the DHCP Box and have it be on both networks at the
same time. It will grant addresses to both networks but will not behave as
a router.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
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Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Microsoft Internet Security & Acceleration Server: Guidance
http://www.microsoft.com/isaserver/techinfo/Guidance/2004.asp
http://www.microsoft.com/isaserver/techinfo/Guidance/2000.asp

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.asp
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