Barefoot Networks, Inc.

At&t Intellectual Property I, LP

Harvard College

Minlan Yu

Yuliang Li

Changhoon Kim

Aman M Shaikh

Muhammad Bilal Anwer

Junzhi Gong

Performance issues in a service function chain having a plurality of resources and a plurality of network functions each having a network function queue are diagnosed. Each network function queue is monitored and queueing information for input packets for each of the plurality of network functions is dumped to a data store. Each resource that is under contention is identified as well as which of the network functions is a contender for the resources. A diagnosing algorithm is used to diagnose performance problems and an impact graph for each victim packet is generated. A summary of results as a list of rules is then provided.

Methods, systems and computer readable media for diagnosing network function virtualization performance

The invention provides a packet loss detection system that in near-real time detects packet loss and reports the identities of the lost packets. The identities of the lost packets are based on a set of packet-specific information that includes five-tuple flow information of the packet and other unique packet identifiers. A set of meters are placed at various vantage points in the network, each meter generates digests summarizing all the traffic passing through itself. The digests are exported to a collector/analyzer, which decodes the digests and performs an analysis to detect packet losses and to determine the lost packets' identities. The collector compares between the traffic digests generated by all the meters surrounding the segment. Mismatches among the digests indicate packet losses. The collector restores the identifiers of the lost packets by further decoding the mismatches between the digests.

Fast detection and identification of lost packets

Growing community of inventors

Cambridge, MA, United States of America

Minlan Yu