Dynamically controlling fair access to a system packet...

Details Dynamically controlling fair access to a system packet... Dynamically controlling fair access to a system packet...

2005-01-26

2010-11-23

Phan, Man (Department: 2475)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S360000, C370S403000, C370S412000, C709S249000

Reexamination Certificate

active

07839865

ABSTRACT:
A method for maintaining configurable and dynamically adjustable per-channel local port/bypass port access ratios in the multiple SOCs within an SPI-attached frame-based switch enclosure to improve the access fairness of devices upstream from the destination device is disclosed. A frame-based switch enclosure may include multiple SPI-attached SOCs, each SOC containing a plurality of ports, with one or more devices connected to each port and one virtual channel assigned to each port. Given a frame-based switch enclosure with N SOCs, the local port/bypass port access ratio for a particular SOC and a given virtual channel, where the particular SOC is M hops away from the SOC having a port corresponding to the given virtual channel and M>0, is 1:(N−M−1), while the local port/bypass port access ratio for the SOC (and the given virtual channel) having the port corresponding to the given virtual channel (i.e. the SOC for which M=0) is 0:0.

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