From: Alexei Monastyrnyi (alexeim@orcsoftware.com)
Date: Mon Oct 09 2006 - 13:44:09 ART
Hi.
2. You cannot configure relationships between spokes, cause they will
use a link-local multicast for hellos and adjacency via hub will not
form.. IMO.
1. well, irrelevant IMO.. though any best practice would be interesting
to know...
A.
on 10/9/2006 12:39 AM Alex De Gruiter (AU) wrote:
> Hey Guys,
>
> I have a question about OSPF neighborship requirements in an OSPF
> non-broadcast topology.
>
> Lets say you have a hub & spoke frame relay topology, with R2 and R3 the
> spokes from R1. If you are not allowed to change the OSPF network type,
> then you will need to use the default NONBROADCAST, and specify a
> neighbor relationship from R1 to the spokes.
>
> My understanding is that in this situation, we should set the OSPF
> priority on the spokes to 0, so that they can not become DR or BDR, and
> neighbor commands are required from R1. i.e.
>
> *=*=*=*=*=*=*=*=**=*=*=*=*=*=*=*=*
>
> R2/R3
>
> int serial0/0
> ip ospf priority 0
>
> R1
>
> router ospf 123
> neighbor 192.168.1.2
> neighbor 192.168.1.3
>
> *=*=*=*=*=*=*=*=**=*=*=*=*=*=*=*=*
>
> However, I have 2 questions:
>
> 1. Although not required (because they will have no impact on the
> formation of neighborships), should we also specify neighbors on the
> spoke routers? Would Cisco expect us to do this, or would the
> configuration on the hub suffice?
> 2. Should we also configure neighbor relationships between the spokes?
>
> Alex
>
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