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Spirent TestCenter: How to test Spanning Tree Protocol (STP) blocked port?

  • Spirent TestCenter
  • Spanning Tree
    • Blocking state
    • Loop
  • See attached STP document for a simple setup.
  • Screen shots in doc is from older Spirent TestCenter GUI but should still be able to follow the information given.
  • Additional question is how to test an STP ring topology.
    • The information about Custom below will help understand how to set this up.
      • Setup 2 Devices one per port to run STP and have 1 device advertise the root bridge with “Custom” rather than Self ( this way it will look like it is advertising the Root which is behind the device). 
      • Then set the Root MAC address to the desired address with a Root Priority of 4096 and Root Path Cost to the desired value.
      • The DUT (Switch) should see the Root Bridge out this port and then set the root port accordingly.



Product : Spirent TestCenter,STP