All enterprise-specific SNMP traps are defined twice in the MIBs, once in
CERENT-454-MIB and then again in CERENT-GENERIC-MIB. By default, the ONS 15454 SDH uses SNMP trap definitions from CERENT-454-MIB and does not use the CERENT-GENERIC-MIB. Other ONS nodes use SNMP trap definitions from CERENT-GENERIC-MIB and do not use the CERENT-454-MIB.
When you check the Use Generic Mib box on an ONS 15454 SDH, the node will
start using SNMP trap definitions from CERENT-GENERIC-MIB instead of the SNMP trap definitions specified by the CERENT-454-MIB to prepare and send SNMP traps.