A Comparison of a few Simple Multicast Schemes for De ection Networks

Multicasting in deeection networks is more diicult than in store-and-forward networks, because of the diiculties in sending multiple copies of the same packet on several output ports. On the other hand, deeected packets stray from their optimal paths and may visit the multicast recipients \accidentally," not necessary in the order envisioned by the sender. We compare a number of natural multicast strategies for deeection networks based on a few simple rules and assumptions. In particular, we never buuer packets that cannot be relayed immediately.