Jason,
You have mentioned what my first thought was...
The interfaces do not even have to be administratively down (AD). They can
be given identical addresses as long as they are down (D).
If the duplicate address is the same as an "up" LAN interface, you get a
warning, but the address is accepted into the running config, but ONLY if
the serial interface is AD. If the serial interface is only D, you get the
same warning, but the address is NOT accepted.
I have not (yet) tried to see how interaction with the LAN interface
proceeds if the LAN interface is AD or D, and I am resisting the temptation
to do so because I have a zillion other things to do...
Hugo.
""J Roysdon"" <[EMAIL PROTECTED]> wrote in message
9a96jb$s5o$[EMAIL PROTECTED]">news:9a96jb$s5o$[EMAIL PROTECTED]...
> Are you sure all interfaces are 'no shutdown' ? You can assign even the
> same ip address to multiple interfaces if they're shutdown.
>
> --
> Jason Roysdon, CCNP+Security/CCDP, MCSE, CNA, Network+, A+
> List email: [EMAIL PROTECTED]
> Homepage: http://jason.artoo.net/
> Cisco resources: http://r2cisco.artoo.net/
>
>
> ""Mask Of Zorro"" <[EMAIL PROTECTED]> wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > Just to throw a wrinkle in all of this, a Cisco router WILL allow you to
> > place up to 4 SERIAL interfaces in the same subnet. Try it... do like
> this:
> >
> > Router>conf t
> > Router(config)int s0
> > Router(config-if)ip add 10.1.1.1 255.255.255.0
> > Router(config-if)int s1
> > Router(config-if)ip add 10.1.1.3 255.255.255.0
> >
> > This works... the router will not complain. Why would you need to do
this?
> I
> > dunno, but you can if you want to - only on SERIAL interfaces...
> >
> > Z
> >
> >
> >
> >
> > >From: EA LOUIE <[EMAIL PROTECTED]>
> > >Reply-To: EA LOUIE <[EMAIL PROTECTED]>
> > >To: "John Neiberger" <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
> > >CC: [EMAIL PROTECTED]
> > >Subject: Re: Stupid question
> > >Date: 30 Mar 2001 10:50:28 PST
> > >
> > >"John Neiberger" <[EMAIL PROTECTED]> wrote:
> > > > The IP address on a switch or hub is for management purposes only
and
> is
> > > > not applied to an actual physical port. The IP address in a switch
or
> > > > hub is applied to a virtual interface so you can use IP to test
> > > > connectivity or telnet to the device for configuration purposes.
> > >
> > >...and don't forget for SNMP monitoring/management, too, if enabled
> > >
> > >:-)
> > >
> > >-e-
> > >
> > > >
> > > > >>> "Wang Chia Ta" <[EMAIL PROTECTED]> 3/30/01 9:40:46 AM >>>
> > > > Thank you for your response. Another question is when or why would
you
> > > > be
> > > > required
> > > > to use set an ip address on a switch and/or hub interface?
> > > >
> > > > Thx.
> > > >
> > > > Wang Chia Ta
> > > > Systems Support
> > > > Mitsubishi Motors
> > > > ---------------------------
> > > >
> > > > ""John Neiberger"" <[EMAIL PROTECTED]> wrote in message
> > > > sac446f2.062@fsutil01">news:sac446f2.062@fsutil01...
> > > > > This isn't a stupid question, it's a very important point to make.
> > > > If
> > > > > you are routing, each interface on the router must be in its own
> > > > subnet.
> > > > > Otherwise routing would not work. If you're bridging, then the
> > > > bridged
> > > > > interfaces are in the same subnet but you don't specifically
assign
> > > > an
> > > > > IP address to those interfaces.
> > > > >
> > > > > I'm guessing that you're really asking the former question: in a
> > > > > routing situation can two different interfaces be in the same
> > > > subnet,
> > > > > and the answer is no.
> > > > >
> > > > > HTH,
> > > > > John
> > > > >
> > > > > >>> After removing all of the HTML, Rick appeared to say... >>>
> > > > > Dear all,
> > > > > I have a stupid question, want to clarify.
> > > > > is it I cannot make two or more interfaces share the same subnet
in
> > > > > the Router?
> > > > > Thanks
> > > > >
> > > > > Best Regards,
> > > > > rick
> > > > [EMAIL PROTECTED]
> > > > [EMAIL PROTECTED]
> > Get your FREE download of MSN Explorer at http://explorer.msn.com
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