Christopher D Chen

US Patent:

20200213186, Jul 2, 2020

Filed:

Mar 12, 2020

Appl. No.:

16/817174

Inventors:

- San Francisco CA, US
Anthony Roberts - San Francisco CA, US
Berk D. Demir - Menlo Park CA, US
Christopher Chen - Portland OR, US

International Classification:

H04L 12/24
H04L 12/931
H04L 12/26
H04L 12/947

Abstract:

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for detecting sources of computer network failures. One of the methods includes identifying a network flow in a computer network between a source and a destination; performing a first probe to determine whether there is end-to-end connectivity between the source and the destination; in response to determining that there is no end-to-end connectivity between the host and the destination, performing one or more additional probes including a second probe to determine whether each hop in the path of the network flow between the source and the destination is operational including requesting that the source transmit a respective first trace diagnostic packet to each hop in the path of the network flow; and determining whether at least one link of the computer network that is part of the path of the network flow has failed based on the results.

US Patent:

20190149398, May 16, 2019

Filed:

Nov 10, 2017

Appl. No.:

15/809836

Inventors:

- San Francisco CA, US
Anthony Roberts - San Francisco CA, US
Berk D. Demir - Menlo Park CA, US
Christopher Chen - Portland OR, US

International Classification:

H04L 12/24
H04L 12/26
H04L 12/947

Abstract:

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for detecting sources of computer network failures. One of the methods includes identifying a network flow in a computer network between a source and a destination; performing a first probe to determine whether there is end-to-end connectivity between the source and the destination; in response to determining that there is no end-to-end connectivity between the host and the destination, performing one or more additional probes including a second probe to determine whether each hop in the path of the network flow between the source and the destination is operational including requesting that the source transmit a respective first trace diagnostic packet to each hop in the path of the network flow; and determining whether at least one link of the computer network that is part of the path of the network flow has failed based on the results.