Rajesh Mangal, 57Gilbert, AZ

2004003, Feb 19, 2004

Aug 15, 2002

10/222733

Charles Hill - Gilbert AZ, US
Rajesh Mangal - Chandler AZ, US
Ralph Snowden - Gilbert AZ, US
Harold Williamson - Tempe AZ, US
James Holbrook - Tempe AZ, US

G01R031/08
H04L012/28

370/229000, 370/412000, 709/235000

Flow control in a distributed switch fabric () includes detecting at least one of a congestion condition () in a downstream transceiver port () and an oversubscribing condition () of a channel buffer (), where the downstream transceiver port () and the channel buffer () both correspond to a channel () of a traffic manager (). Packets begin accumulating in the channel buffer (). Per-flow flow control () operates to modify transmission of the packets over the channel () to the channel buffer () if the channel buffer () reaches a threshold value (). Link level flow control () operates transparently to the traffic manager () if the congestion condition () is detected and the channel buffer () fails to reach the threshold value ().

2018026, Sep 13, 2018

Mar 10, 2017

15/456034

- Tempe AZ, US
Malcolm J. RUSH - Phoenix AZ, US
Martin Peter John CORNES - Phoenix AZ, US
Andrew PORTER - Phoenix AZ, US
Rajesh MANGAL - Gilbert AZ, US

G06F 11/07
G06F 11/16

A system includes a first fail-safe chassis (FSC) receives module health signals from a plurality of modules and generates a first chassis health signal. The chassis health signal includes first and second portions. A plurality of modules receives the chassis health signal. The FSC determines whether one or more of the module heals signals indicates an associated module is unhealthy by comparing the module health signals and a predetermined health value. The FSC selectively de-asserts the first chassis health signal based on the comparison. A second FSC operates similarly. A safety relay box determines the health of the system in accordance with the first and second chassis health signals.