Hello Salvatore
Yes you are correct that for Phase 2 with a broadcast network type, there is direct spoke-to-spoke connectivity. However, this direct connectivity is achieved AFTER the initial communication occurs with the HUB. When a spoke router wants to reach another spoke, it will send an NHRP resolution request to the hub to find the NBMA IP address of the other spoke. This means that initial connectivity must be made with the hub router.
Additionally, in order to achieve this direct spoke-to-spoke connectivity, you need two things:
* Spoke routers need to have a route for the network that they are trying to reach.
* The next hop IP address of the route has to be the remote spoke.
So really in order to achieve spoke-to-spoke connectivity, routing between the spokes must first be established. Initial communication only occurs between the Hub and each individual spoke and this is where the routing exchange must occur.
I hope this has been helpful.
Laz