It saves address space. Instead of using separate networks/Ip address
between the serial interface. You can use the IP unnumbered to use the
Ethernet ip.
Example 1: Without IP unnumbered
------172.16.3.1/24 E0 [Router1)S0 192.168.1.2/252 -------------------
192.168.1.1/252 S0 [Router2]E0 172.16.4.1 -----------
Example 2: With IP unnumbered
------172.16.3.1/24 E0 [Router1)S0 ip unnumbered ------------------- ip
unnumbered S0 [Router2]E0 172.16.4.1 -----------
In example 2 you have saved address space. Also in a large network you
could reduce the size of the routing table because it doesn't have to keep
track to the networks between the router.
Hope that helps
Drew
-----Original Message-----
From: Dyland Desmarais [mailto:[EMAIL PROTECTED]]
Sent: Saturday, December 16, 2000 12:27 PM
To: '[EMAIL PROTECTED]'
Subject: Re: Numbers . . . What numbers?
Which brings me back to my first question, what would be the benefit of
doing this.
Dyland
======================
It means you want use the ip of another (specified) interface, e.g. ip
unnumbered ethernet 0, as the ip of your serial interface.
--
When I disagree with a rational man, I let reality be our final arbiter; If
I am right, he will learn, If I am wrong, I will; one of us will win, but
both of us will profit.
- John Galt
"Dyland Desmarais" <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote in message
<[EMAIL PROTECTED]">news:[EMAIL PROTECTED]>...
> Greetings all
>
> Could someone please shed some light on IP Unnumbered Serial Interfaces.
> From my BSCN book, I understand this is getting ip routing to work on a
> serial interface without specifying a specific ip to the serial interface
> (using the ip unnumbered command)
>
> My question is why would anyone want to do this?
>
> thanx
>
>
> Dyland
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