OSPF and Priorities

From: Alan Ewer (acewer64@gmail.com)
Date: Sun Sep 07 2008 - 22:17:59 ART


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

Blogs and organic groups at http://www.ccie.net



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