Using SNMP to monitor SP CPU load

Hi! I've enabled SNMP service of VNX5200 SPA:

[nasadmin@vnx2-cs0 ~]$ navicli -h SPA networkadmin -mib

Storage Processor:                  SP A

SNMP MIB Status:                    Enabled

Community:                          public

[nasadmin@vnx2-cs0 ~]$ snmpwalk -v 2c -c public -O n SPA .1.3.6.1.2.1.1

.1.3.6.1.2.1.1.1.0 = STRING: VNX5200 - Flare 5.33.0.9.5.155

.1.3.6.1.2.1.1.2.0 = OID: .1.3.6.1.4.1.1981.1.1

.1.3.6.1.2.1.1.3.0 = Timeticks: (608615) 1:41:26.15

.1.3.6.1.2.1.1.4.0 = STRING:

.1.3.6.1.2.1.1.5.0 = STRING: vnx2

.1.3.6.1.2.1.1.6.0 = STRING:

.1.3.6.1.2.1.1.7.0 = INTEGER: 72

How can I monitor SPA CPU load with SNMP? SPA SNMP service does not seem to return anything for OIDs .1.3.6.1.2.1.25.3.3, .1.3.6.1.4.1.2021.10 or .1.3.6.1.4.1.2021.11:

[nasadmin@vnx2-cs0 ~]$ snmpwalk -v 2c -c public -O n SPA .1.3.6.1.2.1.25.3.3

.1.3.6.1.2.1.25.3.3 = No Such Object available on this agent at this OID

[nasadmin@vnx2-cs0 ~]$ snmpwalk -v 2c -c public -O n SPA  .1.3.6.1.4.1.2021.10

.1.3.6.1.4.1.2021.10 = No more variables left in this MIB View (It is past the end of the MIB tree)

[nasadmin@vnx2-cs0 ~]$ snmpwalk -v 2c -c public -O n SPA  .1.3.6.1.4.1.2021.11

.1.3.6.1.4.1.2021.11 = No more variables left in this MIB View (It is past the end of the MIB tree)

Harri