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To: "Dan Piparo" <dan@danworld.net>
References: <200406230729.i5N7TGnc006212@ms-smtp-02.tampabay.rr.com>
From: des@des.no (=?iso-8859-1?q?Dag-Erling_Sm=F8rgrav?=)
Date: Wed, 23 Jun 2004 11:03:38 +0200
In-Reply-To: <200406230729.i5N7TGnc006212@ms-smtp-02.tampabay.rr.com> (Dan
 Piparo's message of "Wed, 23 Jun 2004 03:29:18 -0400")
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cc: freebsd-stable@freebsd.org
Subject: Re: ifconfig netmask problem
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"Dan Piparo" <dan@danworld.net> writes:
> What I really want to know, what is the proper netmask for an alias IP
> address for the latest FreeBSD 4.10-STABLE version.  Did it change for so=
me
> reason?

"it depends"

if the alias is on the same subnet as an existing address (whether on
that interface or another) it must have an all-bits-one netmask to
avoid routing ambiguity.

if it is on a different subnet, it should have the correct netmask for
that subnet.

DES
--=20
Dag-Erling Sm=F8rgrav - des@des.no