Re: Can't figure out simple routing between 2 Windows domains

Chris Allen wrote:
I apologize for such a newbie question, but I'm not a routing person
but because of staffing issues and some stringent time pressures I
have to implement this myself.

I'm lost on how to get a very simple routing setup working for 2
Windows domains. The first domain is domain1.com on subnet
192.168.1.0/24 and is on the 1st floor of the building, on the second
floor I have domain2.com with a subnet of 192.168.2.0/24. The two
networks are physically connected with a single ethernet cable. I
have set up a trust relationship between the two domains, but I can't
figure out how to make it work.

At first I thought I could just directly connect each switch in each
network together with the cable running between them. But this didn't
work because the computers on the two domains are on different
subnets. So now I'm thinking all I need is a router with a static
routing table set up. I'm not sure how to set this up or if this is
the correct solution. Merging the two subnets is not an option
either... I'm confused on how to do a routing setup that would work,
and all of the examples on the internet I can find with static routes
show two routers, one on each network. Do I have to have 2 routers to
do this? It seems excessive for such a simple setup, and I'm very
tight on money at the moment. Also I don't need any kind of fancy
firewalling between the networks, I want all traffic destined for one
to transparently be routed to the other and vice versa. Any kind of
help would be appreciated. Thanks.

You need one router with an interface in each network.

As the link is ethernet, this could be as simple as adding a network card to one of the windows box and joining the two subnets/switches (and ethernet segments) at that box, giving each card an IP in the right network, and turning on routing. That's a pretty nasty way to do it, but sosts very little, and should be easy. You then set the default gateway of each subnet to be the IP of the windows box.

Alternatively, if the switches you have have the required software, you could turn on routing on one switch- but that's a bit harder if you don't know how to do it, and relies on you having capable software.
.

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