Mellanox Technologies, Ltd.

Yonatan Piasetsky

Matty Kadosh

Marian Pritsak

Alan Lo

Aviv Kfir

Yuval Shpigelman

Omer Shabtai

In one embodiment, a system includes a first data communication device including packet processing circuitry to provide a probe packet including an egress timestamp TSindicating a time at which the probe packet egresses the first data communication device, and a network interface to send the probe packet via at least one network connection to a second data communication device, and receive from the second data communication device a response packet including the egress timestamp TS, wherein the packet processing circuitry is configured to associate with the response packet an ingress timestamp TSindicating a time at which the response packet ingresses the first data communication device, and a network metric processor to compute a data latency in the at least one network connection responsively to TS, TS, and an indication of an internal latency of the probe packet in the second data communication device.

Cable latency measurement

A network device includes processing circuitry and a plurality of ports. The ports connect to a communication network. The processing circuitry is configured to receive, via an input port, data packets and probe packets that are addressed to a common output port, to store the data packets in a first queue and the probe packets in a second queue, both the first queue and the second queue are served by the output port, to produce telemetry data indicative of a state of the network device, based on a processing path that the data packets traverse within the network device, to schedule transmission of the data packets from the first queue at a first priority, and schedule transmission of the probe packets from the second queue at a second priority higher than the first priority, and to modify the scheduled probe packets so as to carry the telemetry data.

Low-latency delivery of in-band telemetry data

In one embodiment, a network flow sampling system includes packet processing circuitry to process data packets of multiple network flows, and an adaptive policer to, for each one network flow of the multiple network flows compute a quantity of flow-specific sampling credits to be assigned to the one network flow responsively to a quantity of the network flows currently being processed by the packet processing circuitry, assign the flow-specific sampling credits to the one network flow, sample at least one of the data packets of the one network flow responsively to availability of the flow-specific sampling credits of the one network flow yielding sampled data, while applying sampling fairness among the network flows, and remove at least one of the flow-specific sampling credits of the one network flow from availability responsively to sampling the at least one data packet of the one network flow.

Network flow sampling fairness

In one embodiment, a network flow sampling system includes data communication apparatus, which includes packet processing circuitry configured to process data packets of multiple network flows, and an adaptive policer configured to sample respective ones of the data packets of respective ones of the network flows yielding sampled data, while applying sampling fairness among the respective network flows, wherein at least one of the data packets from each of the respective network flows is sampled.

Growing community of inventors

Tel Aviv, Israel

Yonatan Piasetsky