 Myrinet includes a number of fault-tolerance features, mostly backed by the switches.These include flow control, error control, and "heartbeat" monitoring on every link.The "fourth-generation" Myrinet, called Myri-10G, supported a 10 Gbit/s data rate and can use 10 Gigabit Ethernet on PHY, the physical layer (cables, connectors, distances, signaling).