How can I configure my Windows 2003 DC machine to act as a router?

I have two different networks: network A (10.10.10.0/24) and network B
(172.16.0.0/12). I would like to configure a DC (Windows 2003 Server) of
network B as a router.

There are two network interfaces on Windows 2003 Server. One of them has
ip=172.16.0.2/12, gateway=172.16.0.1. I defined the other's ip as
10.10.10.200/24 and gateway as 10.10.10.250 (this one is connected to network
A).

I changed the registry value of Windows 2003 Server as:

HKLM\System\Currentcontrolset\Services\TCPIP\Param eters\Ipenablerouter=1

I ran routing commands from the command prompt:

route add -p 10.10.10.0 mask 255.255.255.0 10.10.10.200

Now I am able to ping Windows 2003 Server from a client machine on network
A, after running <route add -p 172.16.0.0 mask 255.240.0.0 10.10.10.200>
command.

However, I can not ping any other machine on network B from network A. What
else should I configure? Do I need to reboot Windows 2003 Server?

Also, do I have to run routing command on all client machines? Is it
possible just to define two gateways (one is Windows 2003 Server's related
network interfaces ip adress, the other is the default gateway of the
network) on one ip on the client machines of both networks?

Could anyone help me on this subject?

Try:

1. Get rid of one of the the default gateways on the Windows Server 2003
machine. This isn't the cause of your problem, but it may cause others.

2. Get rid of this route: "route add -p 10.10.10.0 mask 255.255.255.0
10.10.10.200" - it doesn't serve any purpose.

3. On subnet A either configure machines with a default gateway of
10.10.10.200, or:

route -p add 172.16.0.0 mask 255.240.0.0 10.10.10.200

3. On subnet B either configure machines with a default gateway of
172.16.0.2 or:

route -p add 10.10.10.0 mask 255.255.255.0 172.16.0.2

Doug Sherman
MCSE, MCSA, MCP+I, MVP

"john" <(E-Mail Removed)> wrote in message
news:300AC404-8A86-4529-91F4-(E-Mail Removed)...
> I have two different networks: network A (10.10.10.0/24) and network B
> (172.16.0.0/12). I would like to configure a DC (Windows 2003 Server) of
> network B as a router.
>
> There are two network interfaces on Windows 2003 Server. One of them has
> ip=172.16.0.2/12, gateway=172.16.0.1. I defined the other's ip as
> 10.10.10.200/24 and gateway as 10.10.10.250 (this one is connected to
network
> A).
>
> I changed the registry value of Windows 2003 Server as:
>
> HKLM\System\Currentcontrolset\Services\TCPIP\Param eters\Ipenablerouter=1
>
> I ran routing commands from the command prompt:
>
> route add -p 10.10.10.0 mask 255.255.255.0 10.10.10.200
>
> Now I am able to ping Windows 2003 Server from a client machine on network
> A, after running <route add -p 172.16.0.0 mask 255.240.0.0 10.10.10.200>
> command.
>
> However, I can not ping any other machine on network B from network A.
What
> else should I configure? Do I need to reboot Windows 2003 Server?
>
> Also, do I have to run routing command on all client machines? Is it
> possible just to define two gateways (one is Windows 2003 Server's related
> network interfaces ip adress, the other is the default gateway of the
> network) on one ip on the client machines of both networks?
>
> Could anyone help me on this subject?