From: jonatale@xxxxxxxxxxxxx
Date: Fri Aug 17 2001 - 03:53:01 GMT-3
also, it is considered its own network type, along with p2p, bcast, nbma, and
p2mp (i think)
check out radia perlman's interconnections book - a good summary of ospf (also
has isis and basic networking, but the bgp sect is weak)
Chuck Larrieu wrote:
> it operates as a point to point link. why? because the RFC says so. :->
>
> from RFC 2328:
>
> The virtual link is treated as if it were an unnumbered point-to-
> point network belonging to the backbone and joining the two area
> border routers. An attempt is made to establish an adjacency over
> the virtual link. When this adjacency is established, the virtual
> link will be included in backbone router-LSAs, and OSPF packets
> pertaining to the backbone area will flow over the adjacency. Such
> an adjacency has been referred to in this document as a "virtual
> adjacency".
>
> the cost of the link is the sum of the costs of the links across the transit
> area.
> for the real low down check out ftp://ftp.isi.edu/in-notes/rfc2328.txt
>
> HTH
>
> Chuck
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> sanjay
> Sent: Thursday, August 16, 2001 4:41 PM
> To: ccielab@groupstudy.com
> Subject: OSPF Virtual Link question
>
> Does the virtual link run as a demand circuit and why ?
>
> -sanjay
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