Description: NAME = ; DESC = ifIndex value of an interface the peer will have to be \ called on. For example, on an ISDN interface, this can be \ the ifIndex value of a D channel or the ifIndex value of a \ B channel, whatever is appropriate for a given peer. \ As an example, for Basic Rate leased lines it will be \ necessary to specify a B channel ifIndex, while for \ semi-permanent connections the D channel ifIndex has \ to be specified. \ If the interface can be dynamically assigned, this object \ has a value of zero. (Configuration); HELP = The LowerIf is the ifIndex value of a D channel index \ (primary or backup port for a semi-permanent connection), \ or the ifIndex value of a B channel for a leased line.; CAPABILITIES = ;