On Mon, 27 Dec 2010 18:52:00 +0000
AG <computing.account@googlemail.com> wrote:
quoted text
> I have encountered a problem getting 2 NICs on the same machine to 
> interact.  From the machine itself, I can ping my LAN (192.168.1.*) on 
> NIC vr0 (IP 192.168.1.1) but not the router (192.168.1.254) on NIC rl0 
> (10.0.0.1).  The router is an ISP provided model & I can ping it 
> whenever I assign either NIC the 192.168.1.1 address.

To cut it short:
1) You need to have different networks on the two NICs. You can not have
192.168.1.0/24 on both at the same time [1].
If your ISP modem has to have 192.168.1.254 then your internal network
(vr0) has to have a different range (e.g. 10.0.0.0/24).
2) Read & learn about networks, subnets and routing.

regards,
Robert

[1] I'm not going into bridges etc. here