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List:       ms-ospf
Subject:    Re: ospf state problem...
From:       Acee Lindem <acee () RALEIGH ! IBM ! COM>
Date:       1998-11-09 16:04:03
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Russell Sutherland wrote:
>
> On Wed, 4 Nov 1998, John T. Moy wrote:
>
> > As Acee pointed out, what you are doing is a little
> > dangerous, because if you brought that interface up,
> > there would certainly be a problem.
>
> The diagram below was planned not to be a permanent state,
> not rather a transitioning one, with the fibre from intf A
> transfered from R1 to intf A' on R0. Basically we thought
> that R0 could be preconfigured, and as long as intf A' was
> "down" no LSA would occur for it and hence no conflict.
>
> In actual practice we were forced to, in chronological order:
>
>         1. disconnect the fibre from intf A
>         2. remove the OSPF configuration for intf A on R1
>         3. configure and enable intf A' on R0
>         4. reconncect the fibre
> This seems a bit much to do, every time one wants to
> slowly phase in a new router.

Russell,

This is only required when you want the router to have the
same address as the old and isn't all that bad considering most
routers allow dynamic OSPF re-configuration (at least ours do).
You really don't need step 2 as long as you wait for R1 to
detect the interface outage and MAXAGE it's network links
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--
Acee

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