From: Brian Dennis (brian@5g.net)
Date: Fri Sep 13 2002 - 01:37:33 GMT-3
Only put the OSPF neighbor statements on the hub. In a standard hub and
spoke topology the hub has the OSPF neighbor statements and the spokes
have their OSPF priority set to zero.
As far as question two goes think about it like this. If the spokes
aren't going to be the DR or BDR why would they need to communicate
directly with each other to begin with?
Brian Dennis, CCIE #2210 (R&S/ISP Dial)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Krake, Kris
Sent: Thursday, September 12, 2002 8:45 PM
To: ccielab@groupstudy.com
Subject: OSPF over NBMA - network type NMBA question
In a hub and spoke topology where you are forced to use network type
NBMA in
OSPF for a given subnet you have to configure neighbor statements
statically....I understand that part but have a few questions about
being
*precise*.
Obviously you have to configure a neighbor statement from the hub to
each of
the individual spokes but:
1) is it *correct* to leave off the reciprocal neighbor statement on the
spoke pointing to the hub - Adjacencies form without it as long as the
hub
has them configured.
and
2) Should you put in a neighbor statement on each spoke for the remote
spokes? It doesn't appear to be correct to do so because the neighbors
never form an adjacency (TTL issue?).
Anyone?
KK
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Kris A. Krake
AIT Network Engineering and Consulting
502.560.2716
kkrake@aegonusa.com
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