The value of vRtrIfBfdType specifies the configured termination
of a BFD session on this interface. 'cpmNp(1)' specifies
termination on the CPM card's Network Processor. 'auto(2)'
specifies a system-selected termination other than the CPM Network
Processor.
The vRtrIfBfdType object is obsoleted and replaced with
vRtrIfBfdExtType object in 9.0 Release.