In order to advertise the loopback interface as /24 instead of /32 you
should use the command interface: ip ospf network point-to-point.
Regards.
Hugo, CCIE
>From: "Howard C. Berkowitz" <[EMAIL PROTECTED]>
>Reply-To: "Howard C. Berkowitz" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: OSPF question
>Date: Mon, 4 Dec 2000 11:34:01 -0500
>
>>"Elaluf, Sylvia," <[EMAIL PROTECTED]> wrote,
>
>
>
>>Given the following
>>
>>loopback 0
>>ip address 10.10.10.1 255.255.255.0
>>
>>router ospf 1
>>network 10.0.0.0 0.0.0.255 area 0
>>
>>sh ip route 10.10.10.1
>>known via connected loopback 0
>>distributed via ospf 1
>> 10.10.10.1 255.255.255.255
>>
>> what I want is to Advertise the loopback interface as class C and not
>>host
>>specific route.
>>
>>distributed via ospf 1
>> 10.10.10.1 255.255.255.0
>>
>>How do I do that?
>>
>
>First, what problem are you trying to solve? I understand that you
>can advertise or not advertise the loopback, but why do you
>specifically want to advertise it as a /24? In my past experience,
>however, there were differences in advertising it as a /32, a /30,
>and a shorter-than-/30.
>
>There have been some modifications, over time, about how Cisco's
>implementation of OSPF handles loopbacks. The developer with whom I
>discussed them is no longer at Cisco, so I don't have an instant
>source on the code, but probably can get one.
>
>Before then, a couple of questions:
>
>what do the following commands show with your configuration:
>
> sh ip route 10.0.0.0
> sh ip route 10.10.10.0
> sh ip int 10.10.10.1
> sh proto
>
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