One NIC with multiple IP addresses on different networks?

Thomas Nikolajsen thomas.nikolajsen at
Mon Jul 19 01:44:32 PDT 2010

>ifconfig bge0
>ifconfig bge0 alias
>note they are on the same network.
>What if the alias was on a 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.


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