cpu monitor with snmp

[José de F. <jo...@el...>]

Greetings to all !

Anybody can help me about how to monitor CPU LOAD with SNMP ? 
I'm trying use this OID hrProcessorLoad (.1.3.6.1.2.1.25.3.3.1.2) at
host-resoure-mib. i'm using NET-SNMP over Linux.


jose@armadeira:~$ snmpwalk -v2c -c public aracne 1.3.6.1.2.1.25.3.3.1.2
HOST-RESOURCES-MIB::hrProcessorLoad = No Such Instance currently exists
at this OID

or 
jose@armadeira:~$ snmpwalk -v2c -c public aracne hrProcessorLoad
HOST-RESOURCES-MIB::hrProcessorLoad = No Such Instance currently exists
at this OID

thanks in advance