A query on OSPF

For an OSPF area0 over a classic 3-router, Frame-Relay Hub 'n Spoke network,
with the Hub router using the default network type of Non-broadcast and
having neighbor statements for both the spokes, is it at all necessary for
the Hub router to be a DR for achieving full connectivity within the area ?

It doesn't seem to be the case for the Lab i'm working on, 'coz here with
the default priority settings, the hub router does not become the DR, but
still there is full connectivity inside area 0.

I think this is because the rule that routes are to be exchanged only
between the DR and DRothers .... and not directly amongst the DRothers ...
is true only for Broadcast networks and not NBMA networks.

Can the experts kindly attest to .... or elaborate on this ?

I got my doubts because the INE solutions book mentions that the Hub needs
to be a DR mandatorily.

Note : Here we assume frame-relay spoke -to -spoke mappings 'coz without
them, there wouldn't be any connectivity either way.

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Received on Thu Sep 22 2011 - 20:08:19 ART