A dvmrpNeighborLoss trap signifies the loss of a 2-way
adjacency with a neighbor.  This trap should be generated
when the neighbor state changes from active to one-way,
ignoring, or down.  The trap should be generated only if the
router has no other neighbors on the same interface with a
lower IP address than itself.

A dvmrpNeighborNotPruning trap signifies that a non-pruning
neighbor has been detected.  This trap should be generated
at most once per generation ID of the neighbor.  For
example, it may be generated at the time a neighbor is first
heard from if the prune bit is not set in its capabilities.
The trap should be generated only if the router has no other
neighbors on the same interface with a lower IP address than
itself.