I have a triple-boot machine with the following OS's:
1) RHEL 5.4
2) Vista SP2
3) RHEL 5.3

I am set up with static IP addresses all within the same domain and netmask using /etc/host, /etc/host.equiv and /root/.rhosts.

When I switch from Linux 5.4 to Linux 5.3, I can no longer ping the server until I ssh into it, then they see each other.

Any suggestions why?