Direct link for 2 servers

Can anybody help me with the following?

Just as a brief outline of setup, we have a windows 2000 network with 5 servers.

Imagine you have two servers (A and B) both with two network ports. On each of the servers one network port is connected to the office network in the usual way (ie via the switch).

I want to put a cable (cross-over) between the two servers and guarantee that any data requested by A that resides on B comes via the direct link and not via the switch (which will take longer and create general network traffic).

Obviously we could assign a IP address in a different range between the two to keep those ports separate but how do we know data will not still come via the switch??

Any help on this much appreciated.

Cheers.