Below are the SNMP commands to set the Cambium ID and On-board key on ePMP-1000 Radio.
snmpset -v2c -cCOMMUNITY 1.2.3.4 .1.3.6.1.4.1.17713.21.3.20.1.0 i 1
snmpset -v2c -cCOMMUNITY 1.2.3.4 .1.3.6.1.4.1.17713.21.3.20.2.0 s https://cloud.cambiumnetworks.com
snmpset -v2c -cCOMMUNITY 1.2.3.4 .1.3.6.1.4.1.17713.21.3.20.3.0 s <Cambium ID>
snmpset -v2c -cCOMMUNITY 1.2.3.4 .1.3.6.1.4.1.17713.21.3.20.4.0 s <On-boarding Key>
snmpset -v2c -cCOMMUNITY 1.2.3.4 .1.3.6.1.4.1.17713.21.4.3.0 i 1
snmpset -v2c -cCOMMUNITY 1.2.3.4 .1.3.6.1.4.1.17713.21.4.4.0 i 1
snmpset -v2c -cCOMMUNITY 1.2.3.4 .1.3.6.1.4.1.17713.21.4.1.0 i 1
Please execute all the commands as per above sequence and the radio should on-board without any issue.