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Systemd traffic marking
Monitoring Linux services describes how the open source Host sFlow agent exports metrics from services launched using systemd, the default service manager on most recent Linux distributions. In...
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Ryu measurement based control
ONOS measurement based control describes how real-time streaming telemetry can be used to automatically trigger SDN controller actions. The article uses DDoS mitigation as an example.This article...
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Real-time visibility at 400 Gigabits/s
The chart above demonstrates real-time, up to the second, flow monitoring on a 400 gigabit per second link. The chart shows that the traffic is composed of four, roughly equal, 100 gigabit per second...
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Mininet, ONOS, and segment routing
Leaf and spine traffic engineering using segment routing and SDN and CORD: Open-source spine-leaf Fabric describe a demonstration at the 2015 Open Networking Summit using the ONOS SDN controller and a...
View ArticlesFlow to JSON
The latest version of sflowtool can convert sFlow datagrams into JSON, making it easy to write scripts to process the standard sFlow telemetry streaming from devices in the network.Download and compile...
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Loggly
Loggly is a cloud logging and and analysis platform. This article will demonstrate how to integrate network events generated from industry standard sFlow instrumentation build into network...
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Prometheus exporter
Prometheus is an open source time series database optimized to collect large numbers of metrics from cloud infrastructure. This article will explore how industry standard sFlow telemetry streaming...
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Secure forwarding of sFlow using ssh
Typically sFlow datagrams are sent unencrypted from agents embedded in switches and routers to a local collector/analyzer. Sending sFlow datagrams over the management VLAN or out of band management...
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Mininet flow analytics with custom scripts
Mininet flow analytics describes how to use the sflow.py helper script that ships with the sFlow-RT analytics engine to enable sFlow telemetry, e.g. sudo mn --custom sflow-rt/extras/sflow.py --link...
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Arista BGP FlowSpec
The video of a talk by Peter Lundqvist from DKNOG9 describes BGP FlowSpec, use cases, and details of Arista's implementation.FlowSpec for real-time control and sFlow telemetry for real-time visibility...
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sFlow-RT 3.0 released
The sFlow-RT 3.0 release has a simplified user interface that focusses on metrics needed to manage the performance of the sFlow-RT analytics software and installed applications.Applications are...
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Forwarding using sFlow-RT
The diagrams show different two different configurations for sFlow monitoring:Without Forwarding Each sFlow agent is configured to stream sFlow telemetry to each of the analysis applications. This...
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Running sflowtool using Docker
The sflowtool command line utility is used to convert standard sFlow records into a variety of different formats. While there are a large number of native sFlow analysis applications, familiarity with...
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Packet analysis using Docker
Why use sFlow for packet analysis? To rephrase the Heineken slogan, sFlow reaches the parts of the network that other technologies cannot reach. Industry standard sFlow is widely supported by switch...
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Host, Docker, Swarm and Kubernetes monitoring
The open source Host sFlow agent incorporates technologies that address the challenges of microservice monitoring; leveraging recent enhancements to Berkeley Packet Filter (BPF) in the Linux kernel to...
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Flow metrics with Prometheus and Grafana
The Grafana dashboard above shows real-time network traffic flow metrics. This article describes how to define and collect flow metrics using the Prometheus time series database and build Grafana...
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InfluxDB 2.0
Introducing the Next-Generation InfluxDB 2.0 Platform mentions that InfluxDB 2.0 will be able to scrape Prometheus exporters. Get started with InfluxDB provides instructions for running an alpha...
View ArticleObservability in Data Center Networks
Observability in Data Center Networks: In this session, you’ll learn how the sFlow protocol provides broad visibility in modern data center environments as they migrate to highly meshed topologies. Our...
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SC19 SCinet: Grafana network traffic dashboard
The Grafana sFlow-RT Countries and Networks dashboard above shows traffic on the SCinet network, described as the fastest, most powerful volunteer-built network in the world. The network is build each...
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Real-time monitoring at terabit speeds
The Flow Trend chart above shows a real-time, up to the second, view of nearly 3 terabits per second of traffic flowing across the SCinet network, described as the fastest, most powerful...
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