If you are using ip unnumbered,then there is no need to assign IP addresses
to the serial interfaces of Routers A and B.
You could do:
RouterA#show run
and check the listings that follows the serial 0/0. If there is an assigned
IP address, then you have not correctly configured the ip unnumbered. Do the
same for Router B.
The purpose of using ip unnumbered is to conserve the IP addresses similar
to what can the VLSM can do for the serial interfaces,i.e., assigning /30.
e.g., s0/0 IP address: 192.168.3.1/30
The routing table of Router A shows that RIP routing protocol is used and
the 192.168.2.0 network is advertised by Router B via 192.168.3.2 [120/1].
Cost is 1 (one hop away) and admin distance is 120.
Hope I explained it correctly.
Arthur
>From: nobody <[EMAIL PROTECTED]>
>Reply-To: nobody <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: ??Fw: need clarification: ip unnumbered in routing tables
>Date: Mon, 26 Feb 2001 14:15:29 -0800
>
>Is the below a dumb question?
>
>Nobody replied. Can somebody enlighten me? ;-)
>
>p.
>
>----- Original Message -----
>From: "nobody" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Sent: Friday, February 23, 2001 2:07 PM
>Subject: need clarification: ip unnumbered in routing tables
>
>
> > just need to verify my thinking:
> >
> > example: serial line (PPP) connection between routers A and B using ip
> > unnumbered.
> >
> > router A:
> > e0=192.168.1.1/24
> > s0=192.168.3.1/24
> >
> > routing table for A:
> > c 192.168.1.0/24 is directly connected, ethernet0
> > r 192.168.2.0/24 [120/1] via 192.168.3.2, 00:00:05, serial0
> > s* 0.0.0.0/0 is directly connected, serial0
> >
> > router B:
> > e0=192.168.2.1/24
> > s0=192.168.3.2/24
> >
> > routing table B:
> > r 192.168.1.0/24 [120/1] via 192.168.3.2, 00:00:06, serial0
> > c 192.168.2.0/24 is directly connected, ethernet0
> > s* 0.0.0.0/0 is directly connected, serial0
> >
> > i thought that the routing table should reflect the ethernet ip address
>of
> > the remote router on local serial interface? i don't see it here. is it
>an
> > error or is it me?
> >
> > thanx,
> >
> > p.
> >
>
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