[j-nsp] ospf virtual link and rsvp lsp

[R Che]

The guide is for JunOS 6.2. So I believe this must be corrected in latest release?

Raymond Cheh <rcheh at juniper.net> wrote:Which JunOS release is this guide? I checked both 6.0 and 6.4 and I think
the passage to which you refer is this one:

Backbone Areas

An OSPF backbone area consists of all networks in area ID 0.0.0.0, their attached routers, and all area border routers. The backbone itself does not have any area border routers. The backbone distributes routing information between areas. The backbone is simply another area, so the terminology and rules of areas apply: a router that is directly connected to the backbone is an internal router on the backbone, and the backbone's topology is hidden from the other areas in the AS.

The routers that make up the backbone must be physically contiguous. If they are not, you must configure virtual links to create the appearance of backbone connectivity. You can create virtual links between any two area border routers that have an interface to a common nonbackbone area. OSPF treats two routers joined by a virtual link as if they were connected to an unnumbered point-to-point network. 

** End of excerpt **

In this case, the virtual link is to connect the backbone area so that it
becomes one.

Please let me know if you have further questions. Thanks.

Raymond
rcheh at juniper.net


-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net on behalf of R Che
Sent: Tue 8/10/2004 4:41 PM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] ospf virtual link and rsvp lsp

On JunOS Routing Protocol Configuration Guid page 284, it says "you can establish a virtual connection between area border routers by configuring an RSVP LSP". In the rest of this page, it says about virtual link, and I can't think of any relation between a RSVP LSP and virtual link?



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