While performing upgrades for Edges deployed in Hub and Spoke configurations:

  • The Edges configured as a Hub should be upgraded to 3.X before upgrading the Edges configured as Spokes.
  • Tunnel formation will not occur if the Hub is in a 3.X based profile and all the Spokes are running in a 2.X based profile.
  • In order to overcome the above-mentioned restriction, each Spoke profile should have at least one Spoke running in the 3.2.1 based profile.