Question : Problem: One machine, two NICs, different IP's.........problem?

We are in the middle of redesigning our network.  I was wondering what are (if any) the dangers of assigning NICs on the same machine with addresses from different IP ranges?  For example, one machine has an address of 1.1.1.1 and the other NIC in the same machine has 2.2.2.2.  How will this affect communication and or traffic?

Thanks.

Answer : Problem: One machine, two NICs, different IP's.........problem?

If the IP addresses on each NIC are on different subnets, then all it means is that the computer with the two NICs is accessible from both networks and can access both networks.  This is a standard configuration for a server (for example), where one NIC would be connected to the LAN, one to the WAN.

Traffic would only route between the networks if routing was enabled on the computer with the NIC cards.