I have a hub & spoke design in my Lab.
2 spokes, 1 hub in a partial mesh config. I am using 'ip ospf net broadcast' on the serial sub-interfaces of each router. I have full connectivity.
I have frame-relay 'map' statements on each spoke pointing to the other spoke. I am not using the broadcast keyword on the map statements but still have full connectivity ???
Doyle I, is suggesting that I need this 'broadcast' keyword to forward multicast/broadcasts on this network type.
Although Doyle is using physical interfaces not sub-interfaces.
What am I missing here ?