Randy Terbush <randy@zyzzyva.com>  wrote:
 > I'll confirm the same behaviour. The only solution I have found was to
 > first:
 > 
 > route delete IP
 > route add IP localhost

another solution has been suggested to me:

ifconfig xx0 IP alias netmask 255.255.255.255

After looking at the problem for a little while yesterday, it seems that
it's in or near ip_output() because the packet is actually getting to 
the wire which it shouldn't...