Date: Sun, 25 May 2003 12:00:55 +0930 From: Malcolm Kay <malcolm.kay@internode.on.net> To: Andy Farkas <andyf@speednet.com.au>, Grant Peel <grant@thenetnow.com> Cc: freebsd-questions@freebsd.org Subject: Re: IP alias Networking Errors. Message-ID: <200305251200.55652.malcolm.kay@internode.on.net> In-Reply-To: <20030525121135.C23835-100000@hewey.af.speednet.com.au> References: <20030525121135.C23835-100000@hewey.af.speednet.com.au>
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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> mt=
u 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=
=2E125
> > inet 216.187.107.126 netmask 0xffffffff broadcast 216.187.107=
=2E126 =20
> > inet 216.187.107.123 netmask 0xffffffff broadcast 216.187.107=
=2E123
> > inet 216.187.107.124 netmask 0xffffffff broadcast 216.187.107=
=2E124
> > 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 alia=
ses
> > on this machine, thats when I started getting the errors.
>
> When you add aliases for a different subnet, the netmask should be the
> proper one for the subnet ie. netmask 0xfffffff0.
=46rom the man pages (ifconfig(8)):
alias Establish an additional network address for this interface. This
is sometimes useful when changing network numbers, and one w=
ishes
to accept packets addressed to the old interface. If the ad=
dress
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
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