It seems that after changing switch devices from SNMPV2 to SNMPv3 UDT no longer show port information. NPM info all looks good interface , hardware monitoring etc.... all good
Have you tried to get info from your device using UDT Compatibility Checker? Does it provide any L2/L3 data?
I believe i have the same problem with snmpv3 on a device.
any resolution?
I had this issue before. Kindly check on the link below. It is more how you configured your Snmpv3 on the device.
https://support.solarwinds.com/Success_Center/User_Device_Tracker_(UDT)/Knowledgebase_Articles/Layer_2_Layer_3_data_not_visible_when_using_SNMPv3