Hi Rob,

>Macintosh IIci NetBSD 1.6
>ae0 - configured via dhclient
>ae1 - inet 192.168.0.1 netmask 255.255.255.0
>ae2 - inet 192.168.0.9 netmask 255.255.255.248
>Desktop Mac OS X
>inet 192.168.0.2 netmask 255.255.255.0
>Laptop Windows 98 Se
>inet 192.168.0.10 netmask 255.255.255.248
>Have I correctly configured these interfaces?  If I have, what do I
>need to enable communication from the desktop and laptop between ae1
>and ae2?

Your problems may well arise from the overlap between the networks on
ae1 and ae2: the 8 addresses on ae2 also belong to ae1. This means
that your MacOS X desktop machine will consider these addresses as
"local" addresses and not send the packets to your router, the NetBSD
machine.
Easiest solution would be to change the addresses on ae2 and on the
Windows Laptop to, e.g., 192.168.1.1 and 192.168.1.10, respectively.

Hope this helps. Best wishes,

        Nico
-- 
Dr. N.J.R. van Eikema Hommes   Computer-Chemie-Centrum
hommes@chemie.uni-erlangen.de  Universitaet Erlangen-Nuernberg
Phone:   +49-(0)9131-8526532   Naegelsbachstrasse 25
FAX:     +49-(0)9131-8526565   D-91052 Erlangen, Germany