Ok, I have been struggling trying to get the management port to be enabled. Port is connected to my UDM pro. Either DHCP or manual address works, but the port state doesn't change:
GigEthernetmgmt1 is down, line protocol is down
Port down for 2 second(s)
Hardware is GigEthernet, address is 748e.f8de.9f66 (bia 748e.f8de.9f96)
Configured speed auto, actual unknown, configured duplex fdx, actual unknown
Configured mdi mode AUTO, actual unknown
Not a Member of any VLAN , port is untagged, port state is NONE
No port name
Internet address is 10.0.5.10/24, MTU 1500 bytes, encapsulation ethernet
300 second input rate: 0 bits/sec, 0 packets/sec, 0.00% utilization
300 second output rate: 0 bits/sec, 0 packets/sec, 0.00% utilization
1948949 packets input, 566159765 bytes, 0 no buffer
Received 23063 broadcasts, 1925770 multicasts, 116 unicasts
0 input errors, 0 CRC, 0 frame, 0 ignored
0 runts, 0 giants
6 packets output, 384 bytes, 0 underruns
Transmitted 0 broadcasts, 0 multicasts, 6 unicasts
0 output errors, 0 collisions