The value of vRtrIfBfdMultiplier specifies the the number of
consecutive BFD messages that must be missed from the peer before
the BFD session state is changed to down and the upper level
protocols (OSPF, IS-IS or PIM) are notified of the fault.
The vRtrIfBfdMultiplier object is obsoleted and replaced with
vRtrIfBfdExtMultiplier object in 9.0 Release.