The name of the virtual router (Juniper-ROUTER-MIB.juniRouterName) to
be used for authentication on the PPP interface. Setting this object
statically binds the authenticating virtual router with the link
interface. If this object is not explicitly set or it is set to null
string, then this object is ignored and the virtual router used for
authentication is determined by other means. On a Set operation, if the
value of this object is not null and does not correspond to an existing
virtual router, then an inconsistentValue error is returned.