Keyun Cheng

Reading Notes: SDN Textbook

Title: Software-Defined-Networks: A Systems Approach (Chapter 5)

Book (SDN): Link

Summary

Switch OS (with Stratum as an example); only high-level ideas are covered.

Details

• Most popular: Open Network Linux (ONL), Stratum, SONiC

• Focus: the Northbound Interface (NBI) exported by the Switch OS to the control plane

• NBI for Stratum
  • P4Runtime, gNMI, gNOI
  • P4Runtime is used to control the switch’s forwarding behaviors
  • gNMI is used to configure the switch
  • gNOI is to access other operational variables on the switch
• Another Switch OS example: SONiC
  • Vendor-agnostic getting attention in the industry
  • NBI: gNMI, gNOI