False Loop Detection in the IEEE 1394 Tree Identify Phase
Judi Romijn · Formal Aspects of Computing · 2003
Abstract. The physical layer of the IEEE 1394 (FireWire, i-Link) architecture contains a protocol for spanning a tree in the network topology, which fails if the topology contains a loop. We show that the timing requirements for both the 1394-1995 and 1394a-2000 standards are too lenient: these allow for scenarios in which there is no loop in the topology, but the tree-spanning protocol does detect one. The scenarios are found by the model checker U PPAAL .