A circuit arrangement, node, clustered computer system, and method incorporate a primitive communication mechanism for use in exchanging data between adjacent nodes coupled via a point-to-point network. A plurality of network ports are used to couple a node to other nodes in the clustered computer system...http://www.google.se/patents/US20020174168?utm_source=gb-gplus-sharePatent US20020174168 - Primitive communication mechanism for adjacent nodes in a clustered computer system