A bit string describing unicast Reverse Path Forwarding (RPF)
options:
'allowDefault'
Allows the use of the default route for RPF verification.
'allowSelfPing'
Allows a router to ping its own interface or interfaces.
UnicastRpfType
enumeration
An enumerated integer-value describing the type of
unicast Reverse Path Forwarding (RPF) a system applies to
traffic received on an interface. UnicastRpfTypes 'strict' and
'loose' RPF methods are defined in RFC3704.
'disabled'
The system does not perform unicast RPF on packets received
by the interface.
'strict'
The system performs strict unicast RPF on packets received
by the interface.
'loose'
The system performs loose unicast RPF on packets received by
the interface.