Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2005-09-13
2005-09-13
Duong, Frank (Department: 2666)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C709S238000, C709S223000
Reexamination Certificate
active
06944155
ABSTRACT:
A method and system for communication in a system area network (SAN) data processing system are described. The SAN includes a plurality of interconnected nodes that each have at least one port for communication. To avoid communication-induced errors that may arise, for example, if multiple nodes share the same node ID, the port of a node in the SAN is marked as “fenced” to prevent transmission of packets of a first traffic type while permitting transmission of packets of a second traffic type. The marking of the port may be recorded, for example, in a configuration register of the port. While the port is fenced, only packets of other than the first traffic type are routed via the port. In one preferred embodiment, the second traffic type represents SAN configuration traffic, and the first traffic type represents non-configuration traffic. In this preferred embodiment, the marking of the port may be removed following communication of configuration traffic utilized to negotiate unique node ID throughout the SAN.
REFERENCES:
patent: 6272133 (2001-08-01), Bialkowski et al.
patent: 6694361 (2004-02-01), Shah et al.
patent: 6718379 (2004-04-01), Krishna et al.
patent: 2002/0051448 (2002-05-01), Kalkunte et al.
patent: 2002/0133620 (2002-09-01), Krause
Block Timothy Roy
Booth Richard Charles
Engebretsen David Robert
Sand Thomas Rembert
Valk Kenneth Micheal
Dillon & Yudell LLP
Duong Frank
Moore Michael J.
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