Origin 350s running Irix 6.5.20f connected to an enet switch.
SGI TP9500s connected to a hub with an uplink to the above switch.

I configured the TP9500s with an IP of, 11, etc.
I configured an IP alias on the O350s on the same above network, in
addition to it's primary enet address. I can ping and communicate
between the servers using the IP alias, but cannot even ping the
TP9500s. Subnets all match, route statements look correct. Any
thoughts on what the problem may be?