From: andy (andy@cloud9.net)
Date: Sun Sep 07 2008 - 23:59:15 ART
I did a little looking and it seems that:
From "CiscoR OSPF Command and Configuration Handbook (CCIE Professional
Development)"
Neighbor ospf priority lowest wins (section 11-5)
Interface ospf priority highest wins (section 19-8)
This was news to me. I always thought highest won.
Andy
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Jonathan Greenwood II
Sent: Sunday, September 07, 2008 9:56 PM
To: Alan Ewer
Cc: Cisco certification
Subject: Re: OSPF and Priorities
How is it that i cannot get this command to set the DR
(ie the priority) from a neighbour.. ?
Hmm I just labbed it up. When I initially clear the proccess on R1 it shows
the priority information being exchanged
Neighbor ID Pri State Dead Time Address Interface
N/A 100 ATTEMPT/DROTHER 00:01:53 1.1.1.2
FastEthernet00
But once the state is has established it shows as Priority 1
Neighbor ID Pri State Dead Time Address Interface
150.20.2.2 1 FULL/DR 00:01:59 1.1.1.2
FastEthernet00
Good question though I have to play with it a little more or read something
about it more. I agree with you on: R2's default priority of 1 should be
over-ruled by the "suggested priority
of 100
Jonathan
On Sun, Sep 7, 2008 at 6:17 PM, Alan Ewer <acewer64@gmail.com> wrote:
> Hi All this is a bit of a picky question...here goes..
> OSPF will use the DR with the highest priority right..
> this can be set on an interface using the "ip ospf priority 100" command
> ...all good...no problem
>
> however the command neighbor 1.2.3.4 priority 100 is to set a neighbours
> priority to 100 (if it has a lesser priority set..)
> The neighbor assesses the priority in the incoming hello and the
configured
> and the highest priority wins ...Am I right so far..
>
> How is it that i cannot get this command to set the DR
> (ie the priority) from a neighbour.. ?
>
> Ie if R1 and R2 are configured as NBMA.
> R1 is 1.1.1.1 and R2 is 1.1.1.2
>
> I want R2 to be the DR but am not permitted to set a priority. I should be
> able to set R1 up as follows:
> ==================
> router ospf 1
> nei 1.1.1.2 priority 100
> ====================
> R2's default priority of 1 should be over-ruled by the "suggested priority
> of 100
>
> What am I missing here ??
>
> Regds
> Alan E
> Australia
>
>
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