A loopback interface is basically ina network of it's own. it is not
connected to another Interface nor does it particcipate in the transport of
data (in it's normal form atleast.) However it is used (specially in a
dynamic routing enviro) as a "reliable Interface" since it would be
available as long as at least one interface on the unit is up.
Now for the /32 mask. Well why waste more IPs than needed. All you need is
1 is this "broadcast domain" there is nothing else connected to this
interface physically.
-----Original Message-----
From: perryb
To: [EMAIL PROTECTED]
Sent: 4/5/2001 9:28 AM
Subject: Fw: Loopback interface IP address
----- Original Message -----
From: "Alex Lee" <[EMAIL PROTECTED]>
Newsgroups: groupstudy.cisco
To: <[EMAIL PROTECTED]>
Sent: Thursday, April 05, 2001 6:34 AM
Subject: Re: Loopback interface IP address
> Group,
>
> I was looking at some documents at CCO, and noticed that sometimes
their
> examples use /32 IP address like :
>
> interface loopback 0
> ip address 172.16.254.3 255.255.255.255
>
> Can someone help me to understand reason behind in using this type of
> address in the configuration ?
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