ifconfig aliases

["Chris Cameron" <chris@upnix.com>]

I've run into a problem with aliases on a local network that seems
embarrassingly simple.

Have 2 OBSD 3.0 machines, both attached to the same network. I run:

sudo ifconfig xl0 inet alias 192.168.0.5 netmask 255.255.255.255

and

sudo ifconfig rl0 inet alias 192.168.0.6 netmask 255.255.255.255

On the two different machines, almost -exactly- the same as the FAQ.

After doing this, both computers can ping themselves, but not each other. On
the same network, I can make this work with 2 Linux machines (RH 7.2) with a
simple:
ifconfig eth0:0 192.168.0.7
and
ifconfig eth0:0 192.168.0.8


What makes this worse for me is that I have aliases working with real IP
addresses all over the place and I'm quite put-off by this not working.

Have I missed something simple here (I must have)?

Thanks,
Chris