Arista Networks, Inc.

Mehran Ataee

Kumar Narayanan

Charles Melvin Aden

Shashi Kumar

Peter Parkinson

Willy Tjanaka

Mark Isfeld

Embodiments of the present disclosure include multiple DC-DC converters configured to generate multiple voltages based on one or more voltage sources. The DC-DC converters are configured to produce a first voltage and second voltage when a first power source is active, when a second power source is active, or when both the first and second power sources are active. In example embodiments, one voltage is used by a network device to power internal circuitry, and another voltage is coupled to tethered devices.

Circuits and systems for generating power from multiple sources

In some implementations, a method is provided. The method may allow a powered device to determine the maximum power available from power supply equipment. The method includes determining the length of a cable connecting the powered device to the power supply equipment based on the resistance of the cable. The method further includes determining the maximum power available to the powered device based on the length of the cable. The powered device may then be operated based on the maximum power available.

Maximum power detection for powered devices

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Santa Clara, CA, United States of America

Mehran Ataee