The value of tmnxOspfSuppressDNBit specifies whether to suppress the setting of the DN bit for OSPF LSA packets generated by this instance of OSPF on the router. When tmnxOspfSuppressDNBit has a value of 'true' the DN bit for OSPF LSA packets generated by this instance of the OSPF router will not be set. When it has a value of 'false' this instance of the OSPF router will follow the normal procedure to determine whether to set the DN bit.
Sources for this description
Netdisco MIB archive copiesNokia networking MIB copies (LibreNMS/Observium Community)