Configure Logical Interface Properties

For a physical interface device to function, you must configure at least one logical interface on that device. For each logical interface, you must at a minimum specify the protocol family that the interface supports. You can also configure other logical interface properties. These vary by PIC and encapsulation type, but include the IP address of the interface, whether the interface does not support multicast traffic, DLCIs, VCIs and VPIs, and traffic shaping.

To configure logical interface properties, you include the unit statement at the [edit interfaces interface-name] hierarchy level:

 [edit interfaces interface-name]
 unit logical-unit-number { 
 	 disable;
 	 dlci dlci-identifier; 
 	 encapsulation type;
 	 inverse-arp; 
 	 multicast-dlci dlci-identifier; 
 	 multicast-vci vpi-identifier.vci-identifier; 
 	 multipoint;
 	 no-traps; 
 	 oam-liveness {
 	 	 up-count cells;
 	 	 down-count cells;
 	 }
 	 oam-period seconds; 
 	 point-to-point;
 	 shaping {
 	 	 (cbr rate | vbr peak rate sustained rate burst length);
 	 	 queue-length number;
 	 }
 	 tunnel { 
 	 	 source address;
 	 	 destination address; 
 	 	 ttl number;
 	 }
 	 vci vpi-identifier.vci-identifier;
 	 vlan-id number;
 }

This chapter describes the logical interface properties that you can configure.

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