Here is my problem:

NW6.5 SP4 (both Nodes)

2 node cluster of which each node has 2 nics (only 1 active) and the
active nics are plugged into a switch. Both nodes are on battery backup,
but the switch is not.

When the power goes out the switch dies and the servers can't talk. So
they failover.

I would like to use the 2nd nics to create a private network using a
crossover cable so they can talk even if the switch goes down. The problem
I have read on this is that I will not be able to administer the cluster
services in Console One unless I get a PC onto the private network.

Is this still true?

Is it possible to have the heartbeat go out on both nics?