Subject: Re: Virtual Link

From: "Ramalingam, Swaminathan" <[email-masked]>
Date: Tue, 30 Apr 2002 10:29:51 -0400

>-----Original Message-----
>From: wu min [mailto:[email-masked]]
>Sent: Tuesday, April 30, 2002 6:50 PM
>To: [email-masked]
>Subject: Virtual Link
>
>
>Hi,
>
>Should virtual link of a backbone area be manually configured
>or is there a
>way to dynamically establish it through OSPF protocol?

Virtual links are manually configured.
But there were some attempt made by the working 3-4 years back to make OSPF
detect
and fix backbone area partition dynamically (Dynamic virtual link).But, i
guess, nobody
interested in that.

>If an area has 2 ABRs, X and Y, and both have direct connection to the
>backbone area with cost metric C1 and C2 respectively.
>Assuming that there
>exist a virtual link between these two ABRs and the cost
>metric of the link
>is C3. If C1 > C2 + C3, does it means that X will choose the
>virtual link
>instead of direct link to the backbone area?

shortest path will be selected irrespective of the link i.e virtual or
direct link

>
>Thanx.
>
>-Tze Ven
>
>
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