@fvbrasileiro, can you try some SMP config changes?
edit /etc/default/snmpd
and replace
SNMPDOPTS='-Lsd -Lf /dev/null -u snmp -g snmp -p /run/snmpd.pid'
to
SNMPDOPTS='-LSed -u snmp -g snmp -I -ipCidrRouteTable,inetCidrRouteTable -p /run/snmpd.pid'
Then restart snmp.