RE: loop back interfaces and ospf

From: Sreeram P Bandakavi (sbandaka@xxxxxxxxx)
Date: Fri Sep 29 2000 - 16:36:13 GMT-3


   

Whats your IOS version. I think it works only with IOS versions 11.3 and
above..
Sreeram

 -----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Connary, Julie Ann
Sent: Friday, September 29, 2000 12:30 PM
To: Kevin M. Woods
Cc: ccielab@groupstudy.com
Subject: Re: loop back interfaces and ospf

Kevin,

so the answer for the lab according to the link you gave me is to use ip
ospf network point-to-point or put the loopback
interface into another area and use the area range command to summarize.
Because of the following, I am assuming
only the latter (different area and a summary address) really works.

but when I go under the loopback interface and issue the command
ip ospf network ?

I get the following - no choice for point-to-point and point-to-multipoint
does not work.

1#config t
Enter configuration commands, one per line. End with CNTL/Z.
r1(config)#int loop 1
r1(config-if)#ip ospf network ?
   broadcast Specify OSPF Type of Network
   non-broadcast Specify OSPF Type of Network
   point-to-multipoint Specify OSPF Type of Network

r1(config-if)#ip ospf network point-to-multipoint
OSPF: Invalid type for interface

If I look at the ip ospf interface I see:

SYS-5-CONFIG_I: Configured from console by console ospf int loop 1
Loopback1 is up, line protocol is up
   Internet Address 172.16.220.1/24, Area 0
   Process ID 1, Router ID 172.16.220.1, Network Type LOOPBACK, Cost: 1
   Loopback interface is treated as a stub Host

Julie Ann

At 12:06 PM 9/29/2000 -0700, you wrote:
>This thread should help explain:
>
> http://www.groupstudy.com/archives/ccielab/200005/msg00667.html
>
>Kevin
>
>// does anyone know how to get OSPF to advertise a loopback as a subnet vs
a
>// host route?



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