[link_fwd]   Starting test [ node(s): x1 ]
[PASS]       Validation succeeded on x1
[PASS]       Port X1 => DUT the root port; DUT is STP root

[link_block] Starting test [ node(s): x1 ]
[PASS]       Validation succeeded on x1
[PASS]       Link X1-X2 is blocking; DUT is STP root

[SUCCESS]    Tests passed: 2