The value of vRtrPimNgGenCreateInterfaces specifies the PIM
interfaces with default parameters. Setting the value of this
object to 'ies' creates all IES interfaces in PIM.
When the value of vRtrPimNgGenCreateInterfaces is set to 'all',
all IES and non IES interfaces are created in PIM.
When the value of vRtrPimNgGenCreateInterfaces is set to 'none',
all interfaces that are not manually created or modified are
removed.