>
> A couple quick notes. The resiliency that using a loopback interface
> on an ospf router has little to do with individual segments.
> Naturally, if you lose an interface into a multi access segment you
> will lose your adjacencies on that segment.
>
> However, let consider a router with 4 interfaces. Without using a
> loopback interface, if the interface with the highest IP address dies,
> the routers RID changes. What this means is that not only does the
> router lose its adjacencies on the defective interface, it also must
> changes its RID to the next highest address. This will force it to
> lose and rebuild all other adjacencies and as far as I know, for every
> router in the area to recalculate their SPF tree's. Using a loopback
> address, in the same situation, this failure would be contained to the
> one segment.
And break all virtual links until manual reconfig is done...........
brian
>
> Pete
>
>
>
> _________________________________
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-----------------------------------------------
Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
Network Administrator
ShreveNet Inc. (ASN 11881)
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