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Re: DR election

Erblichs <erblichs@EARTHLINK.NET> Mon, 02 May 2005 16:42 UTC

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Date: Mon, 02 May 2005 09:37:25 -0700
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From: Erblichs <erblichs@EARTHLINK.NET>
Subject: Re: DR election
To: OSPF@PEACH.EASE.LSOFT.COM
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Yes and no,

If a router "really wants to be the DR", the protocol does
allow this through a back door. The router must act like
it was already also elected as the DR. This can happen in
what was a split area. By coming up later, the later router
SHOULD know the other's priority and router-id. It can then
boost its broadcasted priority and/or its router-id to gurantee
re-election.

Mitchell Erblich
----------------------


"Krishnan, Vijay G." wrote:
> 
> The first router does not become the DR immediately. It waits for its
> configurable "wait timer" to expire, before electing the DR. Others routers
> could come up during this time. Once the DR is elected, addition of new
> routers would not change the DR. This will reduce the instability due to the
> DR changes.
> 
> regards
> Vijay
> 
> -----Original Message-----
> From: Mailing List [mailto:OSPF@PEACH.EASE.LSOFT.COM]On Behalf Of Ilan
> Bercovich
> Sent: Monday, May 02, 2005 11:51 AM
> To: OSPF@PEACH.EASE.LSOFT.COM
> Subject: DR election
> 
> Hello
> If all routers accept the DR regardless of their Router Priority,
> It means that actually the first active router on the LAN is the DR.
> Isn't this makes the Router Priority parameter somewhat irrelevant?
> (In RSTP for instance, when priority is changed - network is
> re-calculated).
> Ilan

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