When performing an snmpwalk on the ProxySG 900-20 appliance, it is shows the PSU 2 status even though the SG900-20 model does not have the second PSU installed. According to the SG900-20 datasheet, by default this model is equipped with only one PSU and the second PSU is optional.
The SYSinfo shows that the SG900-20 is equipped with a single PSU, but when you do an snmpwalk, you will will two
PSUs as shown the following example:
SNMPv2-SMI::enterprises.34188.8.131.52.184.108.40.206.35 = STRING: "PSU 1 status"
SNMPv2-SMI::enterprises.34220.127.116.11.18.104.22.168.36 = STRING: "PSU 2 status"
This is the expected behavior for the appliance. The administrator can remove the second PSU from the SNMP Manager application in order to reflect the correct number of PSUs installed by default on the SG900-20 model.