All enterprise-specific SNMP traps are defined twice in the MIBs. Once in
CERENT-454-MIB and then in CERENT-GENERIC-MIB. By default, the ONS 15454 SONET uses SNMP trap definitions from CERENT-454-MIB.
When you check the Use Generic Mib box on an ONS 15454 SONET, the node uses
SNMP trap definitions from CERENT-GENERIC-MIB instead of the ones specified by the CERENT-454-MIB to prepare and send SNMP traps. ONS 15454 M6 and ONS 15454 M2 nodes use SNMP trap definitions from CERENT-454-MIB and can not set to the CERENT-GENERIC-MIB.