[2837] in linux-net channel archive
Re: Router/Gated config
daemon@ATHENA.MIT.EDU (R A Lichtensteiger)
Thu May 9 00:49:04 1996
From: R A Lichtensteiger <rali@tifosi.com>
To: john@piper.gats.hampton.va.us (John Burton)
Date: Tue, 7 May 1996 11:02:31 -0400 (EDT)
Cc: hpa@transmeta.com, submit-linux-dev-net@ratatosk.yggdrasil.com
In-Reply-To: <Pine.LNX.3.91.960506082322.140A-100000@piper.gats.hampton.va.us> from "John Burton" at May 6, 96 08:40:34 am
Back at the ranch, John Burton scribed:
<> On 3 May 1996, H. Peter Anvin wrote:
<>
<> > In article <> > RHS Linux User <zap@kraken.port-aransas.k12.tx.us> wrote:
<> >
<> > >As for your question about mixed network classes on one hub, the answer
<> > >is a resounding -NO-, unless you can partition the hub (then it would
<> > >really be two hubs tho, wouldn't it :).
<> > >
<> > >>From what I remember of the subject, all nodes on a given ethernet
<> > >segment must have the same network address.
<> >
<> > Correct.
<>
<> Ummm...hmmmm..."all nodes on a given ethernet segment must have the same
<> network address"...Ummm then I guess our setup isn't working and I'm not
<> sending this e-mail. Our setup:
<> 1. 4 Class C networks on one ethernet segment (building backbone)
<> 2. 2 T-1 Connections & 2 Cisco routers
<> 3. Less than 100 machines distributed across the 4 Class C's
<> 4. Routers handle routing from one Class C to another
<>
<> Don't ask *why* we have it set up this way...its a legacy left over from
<> when the entire building was connected to a much larger LAN via a bridge
<> and *everyone* was on the same Class B network.
Notice Peter didn't say they couldn't be plugged into the same wire; what
he said was that they won't talk to each other (unless there's a router)
If you define subinterfaces then your system resides on all four networks
and you can indeed talk just fine to any host on the physical network.
If you don't / can't define subinterfaces then you can only be on one
"logical network" and you won't be able to communicate with hosts on the
other IP networks. The routers will do that for you, 'cause they have
sub-interfaces ...
Reto
--
rali@tifosi.com
"... I've seen Sun monitors on fire off the side of the multimedia lab.
I've seen NTU lights glitter in the dark near the Mail Gate.
All these things will be lost in time, like the root partition last
week. Time to die...". - Peter Gutmann in alt.sysadmin.recovery
