1. A method, comprising: determining a packet to be transmitted along a communication path in a network from a source to a destination, the communication path having one or more hops between the source and the destination; sending an instruction to one or more tracking nodes along the communication path to track a number of local retransmissions required to successfully transmit the packet from each tracking node to a respective next-hop destination; and receiving, from the one or more tracking nodes, reports indicating the number of local retransmissions.