>ifconfig bge0 202.111.111.111 255.255.255.0 >ifconfig bge0 alias 202.111.111.112 255.255.255.255 > >note they are on the same network. > >What if the alias was on a 203.xxx.xxx.xxx? Would that work? What would >the netmask be in such case?
Whatever you like. I.e. what your ip-addr plan says. (I don't think we support /31 though) (it is often noted that you should ask your network admin, before using ip-addr / mask; to ensure it is consisten with ip-addr plan; but I guess it is you) Non-overlapping ip-subnets for interfaces is the normal case; overlapping, which you mention, is the speciale case, that many ip devices doesn't support. -thomas