> Is the ARP request completing (i.e. is the NetBSD box with the alias
   > address properly responding to ARP requests for both addresses)?
   > 
   > Erik Fair
   > 
   
   The aliased addresses are *not* in the arp table even after forcibly
   deleting and readding the route.

the way to do it i've found is this:

ifconfig le0 aa.bb.cc.dd alias netmask 255.255.255.255

_IF_ aa.bb.cc.dd is on the same network as the 'primary' address on le0.
hmm.. that might be:  if aa.bb.cc.dd is on the same network as anyone
address on le0, but, i'm not sure.

.mrg.