Re: ospf virtual link

Hello karthik,

As for the loop between two Abrs depends on your scenario. At most times what we c wit virtual links is that they are configured between abrs of diff areas.

A virtual link is just an extension of area 0. The backbone. And remeber all areas must atleast have a single link to area 0 as it is through the area that all lsas are exchanged between areas..

HTH

Kabir
------Original Message------
From: karthik thatikonda
Sender: nobody_at_groupstudy.com
To: ccielab_at_groupstudy.com
ReplyTo: karthik thatikonda
Subject: ospf virtual link
Sent: Feb 25, 2010 04:54

Hi GS,

I read that the transit area between two ABR's when a virtual link is formed
must be a stub area. One thing that stucks my mind is that the two ABR's
would advertise Type 3 summary lsa for the default route into the transit
area. Therefore, there is a loop here since the default route is advertised
into the same area twice. Is this thinking correct? Can anyone clearly
elaborate why the transit area must not be a stub area when we form a
virtual link. Honestly, I haven't checked the archives but if there is one
posted already please ignore and I will try to find it.

 Thanks.

 Karthik

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Received on Fri Feb 26 2010 - 05:24:11 ART