RE: OSPF inter-area , area 0 and the RFC

From: Paresh Khatri (Paresh.Khatri@aapt.com.au)
Date: Mon Jul 18 2005 - 20:03:32 GMT-3


Hi Dan

The key to understanding this is the following bit - "only backbone summary-LSAs are examined"

This is what mandates the connectivity of every normal area to the backbone area.

HTH,
Paresh.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Danshtr
Sent: Monday, 18 July 2005 11:49 PM
To: Cisco certification
Subject: OSPF inter-area , area 0 and the RFC

Hello all,

We all know that only area 0 can be a transit area for inter-area traffic.
I am searching the RFC to check how this is done, but could only thing
I could found was:
16.2 "The inter-area routes are calculated by examining summary-LSAs.
        If the router has active attachments to multiple areas, only
        backbone summary-LSAs are examined. Routers attached to a
        single area examine that area's summary-LSAs. In either case,
        the summary-LSAs examined below are all part of a single area's
        link state database (call it Area A)."

Is that it?

-- 
Best regards,
Dan


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