I have an OSPF FR network of one hub and two spokes. The FR is non-broadcast as broadcast is not defined on the layer 3 to layer 2 mapping. So I configured neigbour statement on the Hub to have OSPF adjaceny. It worked. I notice that when I remove the neighbour statement, the adjaceny did not go down btw the hub and spoke, even after clearing the OSPF process.
1. How did the adj continue to from on the FR (without broadcast statement on the Layer 3 to layer 2 mapping), even after removing the neighbour statement on the hub.
2.In a NBMA FR network like this with broadcast statement on the layer 3 to layer mapping, apart fron defining neighbour statement under ospf process, what can be done to achieve ospf adjaceny.
3.Does OSPF sends hello and update through multicast.