Networking setup for DSL/Cable combo

[JaiKnight]

Hey, I'm hoping somebody can help me out with a network setup. Here's the situation.

Computer A has 2 nics, one connected to DSL (hardcoded to DSL IP), and the other nic is connected to a hub
Computer B has only 1 nic (hardcoded to cable IP), connected to the hub.
the Cable modem is connected to the hub and provides two IPs.

How can I get these two computer to use their modem connections separately (if possible). ie: I want A to use the DSL, and B to use the Cable modem, AND have the two computers networked to each other.

The problem I'm currently having is that since the cable modem provides two IPs, computer A keeps on picking up the cable IP and using it instead of the DSL connection.

What combination of protocols/configuration can I use to get them to be networked while still using their own net connections?

 

[Tallgeese]

Short and sweet: Mirror the setup on your DSL machine, and put another NIC in the PC using cable.

Connect the cable modem only to that NIC.
Use the other NIC to connect to the hub.

Use static, private IP addresses for the "internal" NICs.

Curious: Why this funky setup? Desperately Seeking Bandwidth?

 

[JaiKnight]

Is there a way to do it without adding another NIC?

It's actually not my setup, I'm asking for somebody else (and I have no idea why they need two connections, I guess bandwidth hungry would be a good description )

 

[Tallgeese]

What OS on each machine?

 

[Tallgeese]

Try this: Hardcode the IP on the non-DSL NIC in the DSL machine, BUT LEAVE DEFAULT GATEWAY BLANK on that NIC.

As long as the IP address of the DSL machine's 2ndary NIC and the cable machine's NIC are in the same subnet, that should work. No extra NIC required.