I have to say thank you to Aviad.
We have been working with him and he provided a special Hotfix for R80.40/HFA_156, that has allowed us to move dplane OIDs/MIBs to be proxied via the mplane. This way our tools work now. Our tools with SNMPv3 doesn't allow the "-d plane" option. So this fix was a must. We are still in EA testing.
After installing the fix we ran these commands to:
/etc/snmp/vsx-proxy/snmp_vs_do.sh mdps_proxy add .1.3.6.1.2.1.10
/etc/snmp/vsx-proxy/snmp_vs_do.sh mdps_proxy add TCP-MIB
/etc/snmp/vsx-proxy/snmp_vs_do.sh mdps_proxy add UDP-MIB
/etc/snmp/vsx-proxy/snmp_vs_do.sh mdps_proxy add etherStatsTable
/etc/snmp/vsx-proxy/snmp_vs_do.sh mdps_proxy add IP-MIB
/etc/snmp/vsx-proxy/snmp_vs_do.sh mdps_proxy add IF-MIB
/etc/snmp/vsx-proxy/snmp_vs_do.sh mdps_proxy add dot3
/etc/snmp/vsx-proxy/snmp_vs_do.sh mdps_proxy add ifMIB
/etc/snmp/vsx-proxy/snmp_vs_do.sh mdps_proxy add ip
/etc/snmp/vsx-proxy/snmp_vs_do.sh mdps_proxy add rmon
so far so good.