Hi,
Yes, I see this on my 9.1 Filers as well, looks like you can do nothing about it unless you upgrade to 9.4 as per this kb. We also have ports which are un-used but purposely administratively down but they still show up as down.
OnCommand System Manager 9.0 and newer report administratively down interfaces under the Dashboard:
https://kb.netapp.com/app/answers/answer_view/a_id/1070568
Symptom:
In OnCommand System Manager 9.0 and later, the UI is changed. As part of this change, when a user logs into OnCommand System Manager, it will take them to the dashboard for the cluster. The dashboard will display warning level and critical alerts and notifications. As part of this, it can report ports that are down. This issue will be seen under the Alerts and Notifications section in the OnCommand System Manager Dashboard. Here you will see where it reports X ports down under the critical section.
Cause: BUG-956352
This is caused by OnCommand System Manager not checking the administrative status of the port and only checking if it is up or down.
Solution
Upgrade to Ontap 9.4 or later to resolve this issue.
Thanks!