Networking Problem

I am running NetBSD 3.0.1 on a Sun Ultra 5. I've configured
the Ethernet
interface properly and can talk to all the hosts on my
subnet. I do have
a default_route set in rc.conf. However, when i try to ping
a host
outside of my subnet, the system says, 'no route to host.'
All other
machines on my subnet can talk to the outside host with no
trouble. Any
ideas?

Thanks,
Enrico Fermi