1. A network management system (NMS), comprising a controller to: establish between first and second customer edge (CE) routers in a packet network a first logical data tunnel; establish between the first and second CE routers a second logical data tunnel; determine which of the first and second logical data tunnels has a lower packet transmission latency; direct one or more routers associated with the determined logical data tunnel having the lower packet transmission latency to perform synchronization by buffering packet transmissions; enable packet data exchanges between the first and second CE routers over the first logical data tunnel as a primary transport; and direct the first and second CE routers to transmit the packet data exchanged between the first and second CE routers over the first logical data tunnel and the second logical data tunnel regardless of a failure condition.