On Mon, 2 Dec 1996 11:56:37 +0100 (MET) 
 Markus Illenseer <markus@server.peacock.de> wrote:

 >  This works, Jukka Marin gave me the "final" hint. It is not possible
 > to ping the alias-ed IP from the same host, from outside the same host, 
 > you can access the new virtual address just fine.

You need to explicitly add a route to the alias through localhost.  If
you use /etc/ifaliases, this will be done for you when /etc/netstart runs.

Jason R. Thorpe                                       thorpej@nas.nasa.gov
NASA Ames Research Center                               Home: 408.866.1912
NAS: M/S 258-6                                          Work: 415.604.0935
Moffett Field, CA 94035                                Pager: 415.428.6939