Doug,
I believe the answer is C. The order of promotion is always from BDR to DR
when the DR fails. If router B fails then router C will be the DR, and
router A which has just come up on the network then becomes the BDR.
Peter.
>From: "Stephen Alston" <[EMAIL PROTECTED]>
>Reply-To: "Stephen Alston" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: Question for DR/BDR in OSPF
>Date: Tue, 12 Sep 2000 16:52:50 -0400
>
>Doug,
> I see you're using one of your "lifelines"
> I'd go with answer B & make it your final answer.
>
> Reason as stated in the ACRC book is "The only time a DR or BDR will
>change is if one of them goes down. If the DR goes down, the BDR takes
>over
>as the DR and a new BDR is elected. If the BDR goes down, a new BDR is
>elected."
>
>HTH,
>Steve
>
>
>"Doug Laing" <[EMAIL PROTECTED]> wrote in message
>[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > This is a question for study purposes. I want to verify what I think
> > the answer is:
> >
> > Let's say Router A is the Designated Router with priority of 100 and
> > fails. Router B (Backup Designated Router) with priority of 90 becomes
> > the DR and Router C with a priority of 80 becomes the BDR.
> >
> > If Router A comes back up on the network?
> > A) An election held and Router A becomes the DR and Router B becomes the
> > BDR..
> >
> > B) No election is held until Router B goes down. Then Router A becomes
> > the DR and Router C remains the BDR.
> >
> > C) No election is held until Router B goes down. Then Router C becomes
> > the DR and Router A becomes the BDR.
> >
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>
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