Use the HTML interface to enable SNMP, NMS community hosts, and SNMP users.
See Login Information.
If desired, you can disable HTTP access to the PDU by deselecting the HTTP enable checkbox on the HTTP-Access tab of the Net Configuration page.
The enhanced PDU is the default MIB setting.
A network management station (NMS) host runs network management applications that monitor and control SNMP-managed devices. NMS hosts provide the resources required for network management.
For each user select security level, auth algorithm, privacy algorithm, access type, and then check the enable box to enable this user.
See Step 4 in Add Users and Change Passwords (Enhanced PDU).