From: William Lijewski (ccie8642@hotmail.com)
Date: Tue Aug 19 2003 - 04:49:27 GMT-3
Point-to-Multipoint is the preferred method. However, I personally like
Broadcast if there is no restriction for two reasons:
1) Point-to-Multipoint injects a /32 host route into the table for each of
the Frame links, which I personally don't like.
2) Point-to-Multipoint has 30 second hellos whild Broadcast has 10 second
hellos. I like the quicker hellos when I'm doing authentication, or
clearing the OSPF process. Broadcast comes back up much quicker.
Of course for Broadcast you do have to configure the Spokes with a Priority
of 0, so I guess there are some extra commands for Broadcast - 1 negative.
Again, like Larry said, in the lab they are going to give you restrictions.
As long as you don't break the restictions they give you, you will be fine.
William Lijewski
CCIE #8642
>From: Ken.Farrington@barclayscapital.com
>Reply-To: Ken.Farrington@barclayscapital.com
>To: ccielab@groupstudy.com
>Subject: OSPF over Point-to-Multipoint - Discussion
>Date: Tue, 19 Aug 2003 06:38:43 +0100
>
>Hello all :)
>
>As you may gather, I am on chapter 12 of the CCIE practical studies book
>doing the OSPF Labs.
>
>I have one question.
>
>I find that when running OSPF over a frame-relay point-to-multipoint
>network, it is easier to run the "ip ospf network point-to-multipoint"
>configuration on the hub and spoke routers rather than setting neighbors up
>and setting the hub "ip ospf priority 255" and the spokes as "ip ospf
>priority 0"
>
>I personally do not like the way the configuration in NVRAM changes so that
>you don't see the neighbor commands in the hub router configuration when
>you
>set the spoke routers ospf priority to zero and so forth.
>
>The question is (well two actually), 1. what is the preferred method and,
>2. why would you use the neighbor/priority method as to the
>point-to-multipoint method.
>
>I fell that this is quite important to get right and study further before I
>move forward :)
>
>Many thx as always,
>
> ________________________________________________________________
> Ken Farrington
> Global Networks, Barclays Capital, 5 The North Colonnade, Canary
>Wharf, London, E14 4BB
> * Tel : 020 7773 3550
> * Mob : 07768-866655
> * ken.farrington@barcap.com
>
>
>
>
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