Timestamping packets in a network

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United States of America Patent

PATENT NO RE49806
SERIAL NO

16400117

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Abstract

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Techniques are presented herein to facilitate latency measurements in a networking environment. A first network device receives a packet for transport within a network domain that comprises a plurality of network devices. The plurality of network devices have a common time reference, that is, they are time synchronized. The first network device generates timestamp information indicating time of arrival of the packet at the first network device. The first network device inserts into the packet a tag that comprises at least a first subfield and a second subfield. The first subfield comprising a type indicator to signify to other network devices in the network domain that the tag includes timestamp information, and the second subfield includes the timestamp information. The first network device sends the packet from to into the network domain to another network device. Other network devices which receive that packet can make latency measurements.

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Patent Owner(s)

Patent OwnerAddress
CISCO TECHNOLOGY INC170 WEST TASMAN DRIVE SAN JOSE CA 95134

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Edsall, Thomas J Los Gatos, US 100 4266
Huang, Chih-Tsung Burlingame, US 63 565
Huang, Wei-Jen Burlingame, US 89 1321
Lin, Yichou San Jose, US 7 59

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