Do you knwo why I receive snmp trap from Idrac 7 but not from Idrac 6 to my OpManager ? 

When I use the TrapViewer tool (..\ManageEngine\OpManager\bin\MibBrowser.bat), I have no problem and I receive all the trap from Idrac 6 and 7. 

PS:  Unfortunately,  I can't upgrade the Idrac 6 to Idrac 7.

Regards