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  • sFlow: widely supported industry standard
  • based on virtual network and switches
  • monitors all protocols
  • captures packet path
  • senders all open source & free
  • replaces counter polling
  • allows you to do lots of things
  • IP address, URLs, app  attributes...
  • things impossible to get all together, but needed for situational analysis

sFlow now monitors more than just packets; there is also server instrumentation and it can be extended to applications

Why monitor everything with sFlow?
1. troubleshooting - always have context
2. putting network and server teams on same page
   (cloud services)
3. full observability required for automated control
     control theory 101.
     to automate closed loop, have to report all

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