Re: OSPF -- DR

["Antonio Godinho" <antonio at nambu.uem.mz>]

If the routers have equal priorities then the one with the highest IP 
address wins the election for DR.

Cheers,



> [I hope the members of this list don't mind me forwarding these
> messages - but apart from the fact that I'm not a private consultancy,
> there may be other people on this list who can offer additional advice
> or experience]
> 
> On Thu, May 24, 2001 at 06:51:07PM +0300, Bill Sangiwa wrote:
> > i'm trying to setup a DR (desingated router)
> > on my ospf cloud to be the main router to the internet,
> > unfortunately each time i boot the main router another router pick
> > up, how do i set up so that the main router remain DR, i remember u
> > have to do something on cost setting but can't recall exactly what.
> 
> In order to influence the election of which machine is Designated
> Router, you have to configure the router Priority value. If I remember
> rightly, it is the router with the highest Priority which wins. I'm
> not sure what the default value is on a Cisco, but it can take values
> 0-255, and I think a value of 0 means "never be DR" (at least it does
> for gated's OSPF implementation)
> 
> On a network which already has a DR, it will never relinquish its
> status as DR even if another router comes along with a higher
> priority. If you wish to force a re-election, you will need to
> temporarily disconnect both the DR and the BDR, or turn off OSPF on
> those boxes and then turn it back on again.
> 
> Regards,
> 
> Brian.
> 
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Antonio Godinho
B.Sc., MCP, MCP+Internet, MCSE
Address:Av. Julius Nyerere 947 3rd floor esq 
Maputo - Mozambique
Phone  : 258-1-490860
e-mail : ANTONIO at nambu.uem.mz

                     

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