Patent ID: 7877471

Claim:
A clustered computer system comprising: a first power domain manager comprising a first processor coupled to a first memory, a second power domain manager comprising a second processor coupled to a second memory, and a plurality of nodes all coupled together via a plurality of buses in a loop network, wherein the first power domain manager can individually power on and power off any of a first plurality of nodes in the loop network and the second power domain manager can individually power on and off any of a second plurality of nodes in the loop network; and a bus number manager in the first power domain manager, the bus number manager determining at least one logical neighbor for each of the first plurality of nodes, the bus number manager ignoring any nodes in the loop network that are in the second power domain in determining the at least one logical neighbor for each of the first plurality of nodes, the bus number manager writing to non-volatile memory in each of the first plurality of nodes bus numbering information for at least one bus in each node and bus numbering information for at least one bus in each logical neighbor node.