You must have error detect feature enable on the switch.
Please check and paste the output of " show log " it will tell you why the port is going in error disable state.
If you find the cause you can have error disable recovery feature enabled on the switch and it will bring the interface up automatically. You can also disable the error detection feature on the switch.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...