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 Physical Interface Card (PIC) and encapsulation type, but include the IP address of the interface, and whether the interface supports multicast traffic, data-link connection identifiers (DLCIs), virtual channel identifiers (VCIs) and virtual path identifiers (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;

    allow-any-vci;

    atm-scheduler-map (map-name | default);

    bandwidth rate;

    cell-bundle-size cells;

    clear-dont-fragment-bit;

    compression { 

        rtp {

            f-max-period number;

            queues [queue-numbers];

            port {

                minimum port-number;

                maximum port-number;

            }

        }

    }

    description text;

    dial-options {

        l2tp-interface-id name {

            (dedicated | shared);

        }

    }

    disable;

    dlci dlci-identifier;

    drop-timeout milliseconds;

    encapsulation type;

    epd-threshold cells plp1 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;

    service-domain (inside | outside);

    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); 

    trunk-bandwidth rate;

    trunk-id number;

    tunnel {

        backup-destination address;

        destination destination-address; 

        routing-instance {

            destination routing-instance-name;

        }

        source source-address;

        ttl number;

    }

    vci vpi-identifier.vci-identifier; 

    vpi vpi-identifier;

    vlan-id number;

    vlan-tags inner tpid.vlan-id outer tpid.vlan-id;

}

You can include 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 intelligent queuing (IQ) interfaces	Configure MAC Address Filtering
accounting-profile name	All	Configure Accounting for the Logical Interface
allow-any-vci	Asynchronous Transfer Mode (ATM) interfaces	Configure ATM Interface Encapsulation
atm-scheduler-map (map-name | default)	ATM2 IQ interfaces	Configure ATM2 IQ VC Tunnel CoS Components
backup-destination address	Encryption interfaces	Configure IPSec Tunnel Redundancy
bandwidth rate	All interfaces, except multilink and aggregated	Configure the Interface Bandwidth
cbr rate	ATM interfaces	Define the ATM Traffic-Shaping Profile
cell-bundle-size cells	ATM2 IQ interfaces	Configure the Layer 2 Circuit Cell-Relay Cell Maximum
clear-dont-fragment-bit	Adaptive services interfaces	Enable Fragmentation on GRE Tunnels
compression	Voice services interfaces	Configure Compression
description	All	Add a Logical Unit Description to the Configuration
destination (destination-address | routing-instance-name)	Encryption generic routing encapsulation (GRE) tunnel, and IP tunnel interfaces	Configure an Encryption Interface, Configure a Unicast Tunnel, and Configure a Tunnel Interface for Routing Table Lookup
dial-options	Adaptive services interfaces on M7i routing platforms	Configure L2TP Dialup Properties
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 Drop Timeout Period
encapsulation type	All interfaces, except aggregated SONET/SDH and loopback	Configure the Encapsulation on a Logical Interface
epd-threshold cells	ATM2 IQ interfaces	Configure the ATM2 IQ EPD Threshold
f-max-period number	Voice services interfaces	Configure Compression
family	All	Configure the Protocol Family
fragment-threshold bytes	Multilink interfaces	Configure a Fragmentation Threshold
input-vlan-map	Gigabit Ethernet IQ interfaces	Stacking and Rewriting Gigabit Ethernet IQ VLAN Tags
interleave-fragments	Link services interfaces	Configure Link Services Delay-Sensitive Packet Interleaving
inverse-arp	Interfaces with ATM and Frame Relay encapsulation	Configure Inverse ATM1 or ATM2 ARP and Configure Inverse Frame Relay ARP
l2tp-interface-id name (dedicated | shared)	Adaptive services interfaces on M7i routing platforms	Configure L2TP Dialup Properties
mac-address mac-address	Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with small form-factor pluggable transceivers (SFPs)	Configure MAC Address Filtering
minimum-links number	Multilink interfaces	Configure Minimum Links
mrru bytes	Multilink interfaces	Configure 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 ATM1 and ATM2 IQ interfaces	Configure the ATM OAM F5 Loopback Cell Threshold
multipoint	All	Configure a Multipoint Connection
oam-liveness	ATM1 and ATM2 IQ interfaces	Configure the ATM OAM F5 Loopback Cell Threshold
oam-period (disable | seconds)	ATM1 and ATM2 IQ interfaces	Define the ATM OAM F5 Loopback Cell Period
output-vlan-map	Gigabit Ethernet IQ interfaces	Stacking and Rewriting Gigabit Ethernet IQ VLAN Tags
passive-monitor-mode	SONET/SDH interfaces	Enable Passive Monitoring on SONET/SDH Interfaces
peer-unit unit-number	Logical tunnel interfaces	Configure a Logical Tunnel
plp1 cells	ATM2 IQ interfaces	Configure the ATM2 IQ EPD Threshold
point-to-point	All	Configure a Point-to-Point Connection
policer	Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with SFPs	Configure MAC Address Filtering
pop	Gigabit Ethernet IQ interfaces	Stacking and Rewriting Gigabit Ethernet IQ VLAN Tags
port	Voice services interfaces	Configure Compression
push	Gigabit Ethernet IQ interfaces	Stacking and Rewriting Gigabit Ethernet IQ VLAN Tags
queue-length number	ATM1 interfaces	Configure the ATM1 Queue Length
queues [ queue-numbers ]	Voice services interfaces	Configure Compression
routing-instance	GRE tunnel and IP tunnel interfaces	Configure a Unicast Tunnel and Configure a Tunnel Interface for Routing Table Lookup
rtp	Voice services interfaces	Configure Compression
rtvbr peak rate sustained rate burst length	ATM2 interfaces	Configure ATM2 IQ Real-Time VBR
service-domain (inside | outside)	Adaptive services interfaces	Configure the Interface Address and Domain
shaping	ATM1 and ATM2 IQ interfaces	Define the ATM Traffic-Shaping Profile
short-sequence	Multilink interfaces	Configure Sequence Format
source source-address	Encryption, GRE tunnel, and IP tunnel interfaces	Configure an Encryption Interface, Configure a Unicast Tunnel, and Configure a Tunnel Interface for Routing Table Lookup
swap	Gigabit Ethernet IQ interfaces	Stacking and Rewriting Gigabit Ethernet IQ VLAN Tags
tag-protocol-id tpid	Gigabit Ethernet IQ interfaces	Stacking and Rewriting Gigabit Ethernet IQ VLAN Tags
transmit-weight number	ATM2 IQ interfaces	Configure the ATM2 IQ Transmission Weight
(traps | no-traps)	All	Enable or Disable SNMP Notifications on Logical Interfaces
trunk-bandwidth rate	ATM2 IQ interfaces	Configure Layer 2 Circuit Trunk Mode Scheduling
trunk-id number	ATM2 IQ interfaces	Configure Layer 2 Circuit Transport Mode
ttl number	GRE tunnel and IP tunnel interfaces	Configure a Unicast Tunnel
tunnel	Encryption, GRE tunnel, and IP tunnel interfaces	Configure an Encryption Interface, Configure a Unicast Tunnel, or Configure a Tunnel Interface for Routing Table Lookup
vbr peak rate sustained rate burst length	ATM interfaces	Define the ATM Traffic-Shaping Profile
vci vpi-identifier.vci-identifier	ATM1 and ATM2 IQ point-to-point interfaces	Configure a Point-to-Point ATM1 or ATM2 IQ Connection
vpi vpi-identifier	ATM1 and ATM2 IQ point-to-point interfaces	Configure a Point-to-Point ATM1 or ATM2 IQ Connection
vlan-id number	Fast Ethernet and Gigabit Ethernet interfaces	Configure 802.1Q VLANs
vlan-tags inner tpid.vlan-id outer tpid.vlan-id	Gigabit Ethernet IQ interfaces	Stacking and Rewriting Gigabit Ethernet IQ VLAN Tags