Please refer to attached frame relay network diagram and associated router configs.
The 4 routers are interconnected with hub-and-spoke PVCs with R4 as the hub router. All config is done at physical interfaces (no subinterfaces). I disabled FR Inverse ARP and configured static maps, in a full-mesh fashion. i.e. all 4 routers can ping to each others' serial interface IP addresses.
(1) For spoke routers, what's the difference if the "frame-relay map" statements to other spokes contain the "broadcast" keyword and without the "broadcast" keyword. I believe it has something to do with the routing protocol we gonna run on the FR network.
(2) Given my configurations with so-called full-mesh static maps between routers, how does it affect routing protocol neighbor adjacencies? For e.g. EIGRP, are adjacencies formed between R4-R2, R4-R5 & R4-R6 or any-to-any kind of adjacencies, just like in LAN environment?