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 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 or not the interface supports multicast traffic, DLCIs, VCIs and VPIs, and traffic shaping.

To configure logical interface properties, you include the following statements:

unit logical-unit-number {

    accept-source-mac {

        mac-address mac-address {

            policer {

                input cos-policer-name;

                output cos-policer-name;

            }

        }

    }

    accounting-profile name;

    bandwidth rate;

    cell-bundle-size cells;

    clear-dont-fragment-bit;

    disable;

    dlci dlci-identifier; 

    description text;

    drop-timeout milliseconds;

    encapsulation type;

    epd-threshold cells;

    family {

        protocol-family-statements;

    }

    fragment-threshold bytes;

    input-vlan-map {

        pop;

        push;

        swap;

        vlan-id number;

        tag-protocol-id tpid;

    }

    interleave-fragments;

    inverse-arp; 

    minimum-links number;

    mrru bytes;

    multicast-dlci dlci-identifier; 

    multicast-vci vpi-identifier.vci-identifier; 

    multipoint;

    oam-liveness {

        up-count cells;

        down-count cells;

    }

    oam-period (disable | seconds); 

    output-vlan-map {

        pop;

        push;

        swap;

        vlan-id number;

        tag-protocol-id tpid;

    }

    passive-monitor-mode;

    peer-unit unit-number;

    point-to-point;

    shaping { 

        (cbr rate | rtvbr peak rate sustained rate burst length |

                      vbr peak rate sustained rate burst length); 

        queue-length number;

    }

    short-sequence;

    transmit-weight number;

    (traps | no-traps); 

    tunnel {

        backup-destination address;

        source source-address;

        destination destination-address; 

        routing-instance {

            destination routing-instance-name;

        }

        ttl number;

    }

    vci vpi-identifier.vci-identifier; 

    vlan-id number;

    vlan-tag [ tpid.vlan-id ];

}

You can configure these statements at the following hierarchy levels:

• [edit interfaces interface-name]
• [edit logical-routers logical-router-name interfaces interface-name]

This chapter describes the configuration of the logical interface properties:

• Specify the Logical Interface Number
• Configure Logical Router Interface Properties
• Add a Logical Unit Description to the Configuration
• Configure a Point-to-Point Connection
• Configure a Multipoint Connection
• Configure Accounting for the Logical Interface
• Configure the Interface Bandwidth
• Enable or Disable SNMP Notifications on Logical Interfaces
• Configure Interface Encapsulation
• Disable a Logical Interface

For information about interface-specific logical properties, see Interface Types.

Table 10 lists statements that you can use to configure logical interfaces.

Table 10: Statements for Logical Interface Properties

Statement	Interface Types	Usage Guidelines
accept-source-mac	Gigabit Ethernet QPP interfaces	Configure Gigabit Ethernet QPP MAC Address Filtering
accounting-profile name	All	Configure Accounting for the Logical Interface
backup-destination address	Encryption interfaces	Configure IPSec Tunnel Redundancy
bandwidth rate	All interface types except multilink and aggregated	Configure the Interface Bandwidth
cell-bundle-size cells	ATM 2 interfaces	Configure the ATM 2 Layer 2 Circuit Cell-Relay Cell Maximum
clear-dont-fragment-bit	Adaptive services interfaces	Enable Fragmentation on GRE Tunnels
destination (destination-address | routing-instance-name)	Encryption GRE tunnel, and IP tunnel interfaces	Configure a Unicast Tunnel, Configure a Tunnel Interface for Routing Table Lookup, and Configure an Encryption Interface
description	All	Add a Logical Unit Description to the Configuration
disable	All	Disable a Logical Interface
dlci dlci-identifier	Point-to-point interfaces with Frame Relay encapsulation	Configure Frame Relay DLCIs
drop-timeout milliseconds	Multilink interfaces	Configure a Multilink and Link Services Drop Timeout Period
encapsulation type	All interface types except aggregated SONET/SDH and loopback	Configure the Encapsulation on a Logical Interface
epd-threshold cells	ATM 2 interfaces	Configure the ATM 2 EPD Threshold
family	All	Configure the Protocol Family
fragment-threshold bytes	Multilink interfaces	Configure a Multilink and Link Services Fragmentation Threshold
input-vlan-map	Gigabit Ethernet QPP interfaces	Stack and Rewrite Gigabit Ethernet QPP VLAN Tags
inverse-arp	Interfaces with ATM and Frame Relay encapsulation	Configure Inverse ATM 1 or ATM 2 ARP and Configure Inverse Frame Relay ARP
mac-address mac-address	Gigabit Ethernet QPP interfaces	Configure Gigabit Ethernet QPP MAC Address Filtering
minimum-links number	Multilink interfaces	Configure Multilink and Link Services Minimum Links
mrru bytes	Multilink interfaces	Configure Multilink and Link Services MRRU
multicast-dlci dlci-identifier	Point-to-multipoint Frame Relay interfaces	Configure a Multicast-Capable Frame Relay Connection
multicast-vci vpi-identifier.vci-identifier	Point-to-multipoint ATM 1 and ATM 2 interfaces	Configure the ATM OAM F5 Loopback Cell Threshold
multipoint	All	Configure a Multipoint Connection
oam-liveness	ATM 1 and ATM 2 interfaces	Configure the ATM OAM F5 Loopback Cell Threshold
oam-period (disable | seconds)	ATM 1 and ATM 2 interfaces	Define the ATM OAM F5 Loopback Cell Period
output-vlan-map	Gigabit Ethernet QPP interfaces	Stack and Rewrite Gigabit Ethernet QPP VLAN Tags
passive-monitor-mode	SONET interfaces	Enable Passive Monitoring
peer-unit unit-number	Logical tunnel interfaces	Configure a Logical Tunnel
point-to-point	All	Configure a Point-to-Point Connection
policer	Gigabit Ethernet QPP interfaces	Configure Gigabit Ethernet QPP MAC Address Filtering
pop	Gigabit Ethernet QPP interfaces	Stack and Rewrite Gigabit Ethernet QPP VLAN Tags
push	Gigabit Ethernet QPP interfaces	Stack and Rewrite Gigabit Ethernet QPP VLAN Tags
queue-length number	ATM 1 interfaces	Configure the ATM 1 Queue Length
routing-instance	GRE tunnel and IP tunnel interfaces	Configure a Unicast Tunnel and Configure a Tunnel Interface for Routing Table Lookup
shaping	ATM 1 and ATM 2 interfaces	Define the ATM Traffic-Shaping Profile
short-sequence	Multilink interfaces	Configure Multilink and Link Services Sequence Format
source address	Encryption, GRE tunnel, and IP tunnel interfaces	Configure a Unicast Tunnel, Configure a Tunnel Interface for Routing Table Lookup, and Configure an Encryption Interface
swap	Gigabit Ethernet QPP interfaces	Stack and Rewrite Gigabit Ethernet QPP VLAN Tags
tag-protocol-id tpid	Gigabit Ethernet QPP interfaces	Stack and Rewrite Gigabit Ethernet QPP VLAN Tags
transmit-weight number	ATM 2 interfaces	Configure the ATM 2 Transmission Weight
(traps | no-traps)	All	Enable or Disable SNMP Notifications on Logical Interfaces
ttl number	GRE tunnel and IP tunnel interfaces	Configure a Unicast Tunnel
tunnel	Encryption, GRE tunnel, and IP tunnel interfaces	Configure a Unicast Tunnel, Configure a Tunnel Interface for Routing Table Lookup, or Configure an Encryption Interface
vci vpi-identifier.vci-identifier	ATM 1 and ATM 2 point-to-point interfaces	Configure a Point-to-Point ATM 1 or ATM 2 Connection
vlan-id number	Fast Ethernet and Gigabit Ethernet interfaces	Configure 802.1Q VLANs
vlan-tag [ tpid.vlan-id ]	Gigabit Ethernet QPP interfaces	Stack and Rewrite Gigabit Ethernet QPP VLAN Tags