Monday, April 4, 2022

Real-time flow telemetry for routers

The last few years have seen leading router vendors add support for sFlow monitoring technology that has long been the industry standard for switch monitoring. Router implementations of sFlow include:
  • Arista 7020R Series Routers, 7280R Series Routers, 7500R Series Routers, 7800R3 Series Routers
  • Cisco 8000 Series Routers, ASR 9000 Series Routers, NCS 5500 Series Routers
  • Juniper ACX Series Routers, MX Series Routers, PTX Series Routers
  • Huawei NetEngine 8000 Series Routers
Broad support of sFlow in both switching and routing platforms ensures comprehensive end-to-end monitoring of traffic, see Network Equipment for a list of vendors and products.
Note: Most routers also support Cisco Netflow/IPFIX. Rapidly detecting large flows, sFlow vs. NetFlow/IPFIX describes why you should choose sFlow if you are interested in real-time monitoring and control applications.
DDoS mitigation is a popular use case for sFlow telemetry in routers. The combination of sFlow for real-time DDoS detection with BGP RTBH / Flowspec mitigation on routing platforms makes for a compelling solution.
DDoS protection quickstart guide describes how to deploy sFlow along with BGP RTBH/Flowspec to automatically detect and mitigate DDoS flood attacks. The use of sFlow provides sub-second visibility into network traffic during the periods of high packet loss experienced during a DDoS attack. The result is a system that can reliably detect and respond to attacks in real-time.

The following links provide detailed configuration examples:

The examples above make use of the sFlow-RT real-time analytics platform, which provides real-time visibility to drive Software Defined Networking (SDN), DevOps and Orchestration tasks.

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