I have two routers in India and two in US. They all on MPLS and we are running BGP on that. My VOIP PBX is on US and India users (total 900) has to connect VOIP phones having US call server. Now my questions are-
1. Should I configure any EIGRP GRE tunnel over BGP protocol for good voice quality & fast convergence ?
2. If any link will down, how fast BGP will recalculate/ readvertise the route on redundant link? I am looking for very fast failover.