My motherboard has four Ethernet ports built in (igb0-igb3) which are disabled in the BIOS, and have no cabling plugged into them.
I've added a Chelsio 4x10Gbe NIC, and it created cxl0-cxl3
cxl* are in a LAGG setup.
On my dashboard, I see
- System Information
If I go to Network > Inferfaces.
Click on chevron next to igb0.
Click on Delete,
I get the "network connectivity will be interrupted" message.
I confirm, and click Delete.
Click test Changes.
Click Confirm, and Test Changes, again
See the Network have change temporarily...
Click Save Changes. Click Save again...
and igb0 is still there.
No errors, no indication that anything went wrong. Poked around /var/log/ and didn't find any logging to indicate anything was done...