Method and system for filtering inter-node communication in...

Multiplex communications – Pathfinding or routing – Switching a message which includes an address header

Reexamination Certificate

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Details

C709S238000, C709S223000, C370S392000

Reexamination Certificate

active

07110402

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: 6944155 (2005-09-01), Block et al.
patent: 2002/0051447 (2002-05-01), Kalkunte et al.
patent: 2002/0133620 (2002-09-01), Krause

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