RE: OSPF priority and neighbor command

Further to this. Does this have something to do with the fact that the
priority 0 command takes the spoke router out of the running for DR/BDR
election?

Hello's are not sent from the spoke until the spoke learns of the 'DR'?? In
this case hello's must be initiated from the hub with the neighbor command.
Is this correct?

Cheers,

-Aaron.

From: Aaron Riemer [mailto:ariemer_at_amnet.net.au]
Sent: Wednesday, 13 July 2011 10:28 AM
To: 'GS CCIE'
Subject: OSPF priority and neighbor command

Hey guys,

I am testing OSPF within an NBMA non-broadcast network. I ensure that the
spokes do not become DR/BDR by setting the priority to 0 on the relevant
frame relay spoke interface.

What I have found is that with the priority set to '0' the router will not
accept the 'neighbor x.x.x.x' command under the ospf process. (When I say
accept I mean it is not visible within the configuration).

This is a problem as unicast hello's are not sent to the hub and an
adjacency does not form. I found that removing the 'ip ospf priority 0'
command from the frame relay spoke interface would resolve the problem and
the neighbor command would be accepted and adjacencies would form.

I know there are ways around this (set neighbor command on hub) but I am
just interested as to why this is occurring to help my understanding.

Any comments greatly appreciated.

Thanks,

-Aaron.

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Received on Wed Jul 13 2011 - 10:41:30 ART