Disable SNMP v2
1. Edit /etc/snmp/snmpd.conf as sudo. Comment out rocommunity and rocummunity6 entries.
2. # Default access to basic system info
3. #rocommunity public default -V systemonly
#rocommunity6 public default -V systemonly
#rocommunity6 public default -V systemonly
4. Restart the SNMP daemon.
admin@livenx:~$ sudo systemctl restart snmpd