In phase 1 of DMVPN, why do we need to disable split horizon if we are sending a defualt route from the hub? I believed either we send a defualt from the hub and specifics from the spokes OR disable split horizon on the hub.
Also if we are using RIP, why do we need to do a passive on the spoke tunnel interfaces? I was going through an article and had these doubts. Would appreciate if anyone can clear it