General
Connect 100G breakout cable to port 51 or 52, make sure all the breakout ports are up, unplug one of the breakout cable, all the breakout ports go down
(this defect also apply to 40G breakout cable to port 51 or 52, lane 1 has to be connected and up all the time. If not, 'no shut' on Lane 2-4 won't work. The ports will remain down after shut / no shut)
Symptom
If you shut or unplug one of the breakout ports, all of the breakout ports go down.
Conditions
100G breakout cable connected to port 51 or 52 on a Cisco N9K-C93180YC-FX switch.
