The interval at which NCDP configuration PDUs are to be
generated.
The message interval directly affects the convergence time
of the NCDP algorithm. Convergence time is equal to the max
network diameter * message interval + transmission delays +
the time a configuration PDU is spent being processed in
each device. Thus if transmission delays and processing
delays are both close to 0, the convergence time is
approximately ( max network diameter * message interval )
milliseconds.
The value of cncNcdpHoldTime should normally match the value
of this object.
This object is only used by the NCDP protocol entity.