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Arrillaga Alumni Center: 326 Galvez Street, Stanford, CA 94305
Sponsored by: Netronome, AT&T, Cisco, Hewlett Packard Enterprise & Barefoot Networks
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Tuesday, May 24 • 11:30am - 11:50am
Using INT to Build a Real-time Network Monitoring System @ Scale

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Inband Network Telemetry (“INT”) is a framework designed to allow the collection and reporting of network state, by the data plane, without requiring intervention or work by the control plane (http://p4.org/p4/inband-network-telemetry/).  In the INT architectural model, packets contain header fields that are interpreted as “telemetry instructions” by network devices.  These instructions tell an INT-capable device what state to collect and write into the packet as it transits the network.  SwitchID, hop latency and  queue occupancy are some of the per-packet metadata that could be collected using INT.  Connection Path and Latency Tracking (PLT)  is a novel network monitoring application that leverages INT in a scalable manner to gain real-time visibility into a network's behavior. PLT uses INT to track the path and latency encountered by every connection and uses deduplication (from within the data plane) to do this in a scalable and efficient manner . Each time a new connection is detected or a change is detected in the path/latency of an existing connection,  an "INT report" is generated and sent to a remote distributed monitoring engine. The reports enable the monitoring engine to detect a variety of anomalies in the network in real time (eg: connection/switch congestion, unused switches, flow imbalance, etc.). They also facilitate other interesting use cases such as network behavior verification, faithful reconstruction of traffic patterns and network characterization.

*This presentation also has an associated demo: Using INT to Build a Real-time Network Monitoring System @ Scale

avatar for Petr Lapukhov, Facebook

Petr Lapukhov, Facebook

Petr is a network engineer at Facebook, working on monitoring and control systems for the network infrastructure. Prior to Facebook, Petr worked at Microsoft as part of the team that built and supported the Bing data-center networks.
avatar for Jithin Thomas, Barefoot Networks

Jithin Thomas, Barefoot Networks

Jithin recently finished his MS in EE at Stanford University, where he worked on Delite, a compiler framework and runtime for parallel embedded DSLs. Prior to Stanford, he was a Research Developer at Microsoft Research India, where he worked in the field of empirical software engineering. Currently, he works as a software engineer at Barefoot, to help build advanced applications like PLT that leverage the power of programmable data... Read More →

Tuesday May 24, 2016 11:30am - 11:50am
McCaw Hall - Presentations

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