When the object vRtrType has a value of 'vprn', the value of
vRtrInterASMvpn indicates whether the VPRN service is used for inter-AS
MVPN or not.
If the value of the object is 'true', it indicates that the vprn
service is used for inter-AS MVPN only. If the value of the object is
'false', it indicates that the vprn service is not used for inter-AS
MVPN.