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 proceedure to determine
whether to set the DN bit.