> You have a broken machine (probably SunOS) replying to your broadcast
> with an ICMP unreachable port.
Ah, thanks. That was indeed the problem. The offending machine is
actually connected with a SLIP link. Since there isn't really any such
thing as a broadcast on a point-to-point link, the datagrams are going out
with that machine's address in the destination field. Presumably it *is*
entitled to give a port unreachable here.
I guess the easiest fix is just to take out the line from rwhod that
reports the errors, and let it fail quietly. Or I could tell rwhod not to
transmit on non-broadcast interfaces.
P.