From: Voss, David (dvoss@heidrick.com)
Date: Fri Mar 28 2003 - 18:02:15 GMT-3
If you enable OSPF for a loopback interface and do a debug, you will see
that it is not generating any traffic (like RIP does).
router ospf 1
network 0.0.0.0 255.255.255.255 area 0
Loopback0 3.3.3.3 YES manual up
up
Loopback100 10.10.10.3 YES manual up
up
Serial0 unassigned YES manual up
up
Serial0.1 1.1.1.3 YES manual up
up
R3#
2d18h: IP: s=1.1.1.2 (Serial0.1), d=224.0.0.5, len 68, rcvd
2d18h: IP: s=1.1.1.3 (local), d=224.0.0.5 (Serial0.1), len 68, sending
broad/mul
ticast
2d18h: IP: s=1.1.1.2 (Serial0.1), d=224.0.0.5, len 68, rcvd 0
2d18h: IP: s=1.1.1.3 (local), d=224.0.0.5 (Serial0.1), len 68, sending
broad/mul
ticast
-----Original Message-----
From: ccie1@hotmail.com [mailto:ccie1@hotmail.com]
Sent: Thursday, March 27, 2003 9:57 PM
To: Tony Schaffran; Nawaz, Ajaz; ccielab@groupstudy.com
Subject: Re: Make loopbacks passive
My assumption would be so your not allowing OSPF to broadcast or send
updates to a interface that is not connected to another router.
----- Original Message -----
From: "Tony Schaffran" <tschaffran@cconlinelabs.com>
To: "Nawaz, Ajaz" <Ajaz.Nawaz@bskyb.com>; <ccielab@groupstudy.com>
Sent: Friday, March 28, 2003 10:30 AM
Subject: Re: Make loopbacks passive
> I am just curious, why would you need or want to make a loopback passive?
>
>
>
> Tony Schaffran
> Network Analyst
> CCIE #11071
> CCNP, CCNA, CCDA,
> NNCSS, NNCDS, CNE, MCSE
>
> www.cconlinelabs.com
> "Your #1 choice for Cisco rack rentals."
>
>
> ----- Original Message -----
> From: "Nawaz, Ajaz" <Ajaz.Nawaz@bskyb.com>
> To: <ccielab@groupstudy.com>
> Sent: Friday, March 28, 2003 8:56 AM
> Subject: OT: Make loopbacks passive
>
>
> > Does anyone know if Cisco have documented the best practice of making
> > loopbacks passive when running ospf (or other routing protocol) for
> example
> > ? e.g.
> >
> > router ospf 100
> > passive interface loopback 0
> >
> > ajaz
> >
> >
> > **********************************************************************
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