Re: Restart signaling, DR/BDR, and RouterDeadInterval

["Manral, Vishwas" <[e-mail]>]

Mitchell,

I guess the "restart signaling" draft is now located at
http://www.ietf.org/internet-drafts/draft-nguyen-ospf-restart-00.txt

Though Alex, or some other draft author would give the exact details, I
think this draft does not bother about keeping DR state, so if a DR router
goes down, and comes up it may no longer be the DR after the DR election.
Things I guess work as per the base RFC2328.

Acee,

Thanks for the information. (However I don't remember asking a question
related to this. ;-))

Thanks,
Vishwas

-----Original Message-----
From: Acee Lindem [mailto:[e-mail]]
Sent: Friday, May 10, 2002 9:07 PM
To: [e-mail]
Subject: Re: Restart signaling, DR/BDR, and RouterDeadInterval


Michelle, Manral,

There are two hitless restart drafts. Although I was not at
the specific meeting, the one below is the one that was accepted
by the OSPF work group.

http://www.ietf.org/internet-drafts/draft-ietf-ospf-hitless-restart-02.txt

IMHO, it does address your questions although there is
currently no provision for a restart that doesn't proceed within
the router dead interval. We are considering this for our
implementation.


Erblichs wrote:
> OSPF Restart Signaling.. Feb01 to Sept01
>
> Hi Group,
>
>         I didn't see if this became a standard, so
>         this clarification / question could be moot..
>
>         Just thinking of the proper way to code
>         this..
>
>         I assume that if a hello is recieved from
>         a restart router within the RouterDeadInterval
>         timeframe, then there is significantly less
>         work... There was no intervening teardown..
>
>         However, what is not mentioned, and I want to
>         clarify this..
>
>         Assume both routers support Restart..
>         If the restarting router was the DR or the BDR,
>         there is no assumption that if the restart was
>         done WITHIN the RouterDeadInterval timeframe,
>         the adjacency is still up, that a restarting
>         router would stay the BDR or DR...
>
>         Assume both routers support restart..
>         Else, NOT WITHIN the RouterDeadInterval timeframe.
>         We have to assume that there was a intervening
>         election. Would we do another election?
>
>         There is no mention of election effects / side-effects
>         with respect to the restarting router, when all or
>         some routers support restart? The non-restart supported
>         routers would force a re-election.
>
>         Thanks,
>                 Mitchell Erblich
>


--
Acee