Setting this object to an interface name prior to starting a remote
traceRoute operation directs the traceRoute probes to be transmitted
over the specified interface. To specify the interface index instead,
see traceRouteCtlIfIndex. The interface name must be specified under
interfaces statement of the JUNOS configuration. A zero length string
value for this object means that this option is not enabled. The
following values may be set simultaneously, however, only one value is
used. The precedence order is a follows:
traceRouteCtlIfIndex (see traceRouteCtlTable in traceRouteMIB)
jnxTRCtlIfName
jnxTRCtlRoutingInstanceName