Available bandwidth detector for SAN switch ports

Details Available bandwidth detector for SAN switch ports Available bandwidth detector for SAN switch ports

2008-03-04

2008-03-04

Kelley, Chris (Department: 2609)

Multiplex communications

Diagnostic testing

Determination of communication parameters

C370S463000, C370S468000, C370S395410, C709S223000, C709S229000

Reexamination Certificate

active

07339896

ABSTRACT:
A system and method for measuring data transmission activity through a port of a switch device interconnecting nodes of a storage area network, the port transmitting data as words of predetermined length, one data word indicating idle port activity. The method includes steps of: counting a number of transmitted words received from the port in a first counter device; and, for each word counted, comparing that word with a predetermined word indicating no (idle) port transmission activity. In response to the comparing, a number of matches are counted in a second counter device. In this manner, a ratio of a number of counted matches with a total amount of words counted indicates available bandwidth for transmitting additional data over that link. Preferably, this value is communicated to a processor device for controlling bandwidth over the link.

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