[pim] Question about PIM Trap pimNeighborLoss

["Xiangrong Cai" <kcai at nortel.com>]

In PIM MIB RFC2934, PIM Traps section, there is this pimNeighborLoss trap:

======================================================
-- PIM Traps   

pimNeighborLoss NOTIFICATION-TYPE
   OBJECTS {
      pimNeighborIfIndex
   }
   STATUS             current
   DESCRIPTION
           "A pimNeighborLoss trap signifies the loss of an adjacency
           with a neighbor.  This trap should be generated when the
           neighbor timer expires, and the router has no other
           neighbors on the same interface with a lower IP address than
           itself."
   ::= { pimTraps 1 }
=======================================================

Can somebody tell me why this trap needs to be raised? From the text, it 
seems to me that if I have the lowest ip (either because I had and still 
have or because the dead one is the only one that had lower ip than I 
do), and I detected a neighbor loss, then I should raise this trap. Why 
this way? To me the only place that deal with neighbor IP address in PIM 
is DR election, but DR election involves with Priority also, and if 
priority is the same, the highest ip, not the lowest ip, becomes the new DR.

Thanks.

-- Karl


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