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From: Malcolm Kay <malcolm.kay@internode.on.net>
Organization: At home
To: Andy Farkas <andyf@speednet.com.au>,
	Grant Peel <grant@thenetnow.com>
Date: Sun, 25 May 2003 12:07:06 +0930
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cc: freebsd-questions@freebsd.org
Subject: Re: IP alias Networking Errors.
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On Sun, 25 May 2003 12:00, Malcolm Kay wrote:
> On Sun, 25 May 2003 11:51, Andy Farkas wrote:
> > On Sat, 24 May 2003, Grant Peel wrote:
> > > fxp0: flags=3D8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> =
mtu
> > > 1500 inet 65.39.193.154 netmask 0xfffffff0 broadcast 65.39.193.159 =
inet
> > > 65.39.193.155 netmask 0xffffffff broadcast 65.39.193.155 inet
> > > 65.39.193.156 netmask 0xffffffff broadcast 65.39.193.156 inet
> > > 65.39.193.157 netmask 0xffffffff broadcast 65.39.193.157 inet
> > > 216.187.107.125 netmask 0xffffffff broadcast 216.187.107.125 inet
> > > 216.187.107.126 netmask 0xffffffff broadcast 216.187.107.126 inet
> > > 216.187.107.123 netmask 0xffffffff broadcast 216.187.107.123 inet
> > > 216.187.107.124 netmask 0xffffffff broadcast 216.187.107.124 ether
> > > 00:06:5b:ee:40:32
> > >         media: Ethernet autoselect (100baseTX <full-duplex>)
> > >         status: active
> >
> > ...
> >
> > > When the next group of IP were assigned to me, and I set them as
> > > aliases on this machine, thats when I started getting the errors.
> >
> > When you add aliases for a different subnet, the netmask should be th=
e
> > proper one for the subnet ie. netmask 0xfffffff0.
>
> From the man pages (ifconfig(8)):
> alias   Establish an additional network address for this interface.  Th=
is
>              is sometimes useful when changing network numbers, and one
> wishes to accept packets addressed to the old interface.  If the addres=
s is
> on the same subnet as the first network address for this interface, a
> non-conflicting netmask must be given.  Usually 0xffffffff is most
> appropriate.
>
> Malcolm

Aah yes;
I see I misinterpreted your statement -- sorry!

Malcolm