Configure Physical Interface Properties

The software driver for each network media type sets reasonable default values for general interface properties, such as the interface's maximum transmission unit (MTU) size, receive and transmit leaky bucket properties, link operational mode, and clock source. To modify any of the default general interface properties, include the appropriate statements at the [edit interfaces interface-name] hierarchy level:

interfaces {

     interface-name {

        accounting-profile name;

        aggregated-ether-options {

            aggregated-ether-interface-options;

        }

        aggregated-sonet-options {

            aggregated-sonet-interface-options;

        }

        atm-options {

            atm-interface-options;

        }

        clocking clock-source;

        dce;

        description text;

        disable; 

        ds0-options {

            ds0-interface-options;

        }

        e1-options {

            e1-interface-options;

        }

        e3-options {

            e3-interface-options; 

        }

        encapsulation type;

        fastether-options {

            fastether-interface-options;

        }

        gigether-options {

            gigether-interface-options;

        }

        hold-time up milliseconds down milliseconds;

        keepalives <down-count number> <interval seconds> <up-count number>;

        link-mode mode;

        lmi {

            lmi-type (ansi | itu);

            n391dte number;

            n392dce number;

            n392dte number;

            n393dce number;

            n393dte number;

            t391dte seconds;

            t392dce seconds;

        }

        mac mac-address;

        mtu bytes;

        multiservice-options {

            boot-command filename;

            (core-dump | no-core-dump);

            (syslog | no-syslog);

        }

        no-keepalives;

        no-partition {

            interface-type type;

        }

        partition partition-number oc-slice oc-slice-range interface-type type {

            timeslots time-slot-range;

        }

        ppp-options {

            chap {

                access-profile name;

                local-name name;

                passive;

            }

        }

        receive-bucket {

            overflow (tag | discard);

            rate percentage;

            threshold number;

        }

        serial-options {

            eia-530-interface-options;

        }

        sonet-options {

            sonet-interface-options;

        }

        speed (10m | 100m);

        t1-options {

            t1-interface-options;

        }

        t3-options {

            t3-interface-options;

        }

        traceoptions {

            flag flag <flag-modifier> <disable>;

        }

        transmit-bucket {

            overflow (discard);

            rate percentage;

            threshold number;

        }

        (traps | no-traps); 

        unit {

            logical-interface-statements;

        }

        vlan-tagging;

    }

}

This chapter discusses configuration of the following physical interface properties:

• Configure Aggregated Interfaces
• Add an Interface Description to the Configuration
• Configure the Link Characteristics
• Configure the Media MTU
• Configure Interface Encapsulation
• Configure PPP Challenge Handshake Authentication Protocol
• Configure the Interface Speed
• Configure Keepalives
• Configure the Clock Source
• Configure the Router as a DCE
• Configure Receive and Transmit Leaky Bucket Properties
• Configure Accounting
• Configure BERT Properties
• Trace Operations of an Individual Router Interface
• Damp Interface Transitions
• Configure Multiservice Physical Interface Properties
• Enable or Disable SNMP Notifications on Physical Interfaces
• Disable a Physical Interface

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

Table 2 lists statements that you can use to configure physical interfaces.

Table 2: Statements for Physical Interface Properties

Statement	Interface Types	Usage Guidelines
access-profile name	Interfaces with PPP encapsulation.	Configure PPP Challenge Handshake Authentication Protocol.
accounting-profile name	All.	Configure Accounting.
acknowledge-retries number	Link services interface.	Configure Link Services Acknowledgment Timers.
acknowledge-timer milliseconds	Link services interface.	Configure Link Services Acknowledgment Timers.
aggregated-ether-options	Aggregated Ethernet interfaces.	Configure Aggregated Ethernet Interfaces.
aggregated-sonet-options	Aggregated SONET/SDH interfaces.	Configure Aggregated SONET/SDH Interfaces.
atm-options	ATM 1 and ATM 2 interfaces.	Configure ATM 1 and ATM 2 Physical Interface Properties.
boot-command filename	Passive monitoring interfaces.	Configure Multiservice Physical Interface Properties.
chap	Interfaces with PPP encapsulation.	Configure PPP Challenge Handshake Authentication Protocol.
clocking clock-source	ATM, DS-0, E1, E3, SONET/SDH, T1, and T3 interfaces.	Configure the Clock Source.
(core-dump | no-core-dump)	Passive monitoring interfaces.	Configure Multiservice Physical Interface Properties.
dce	Interfaces with Frame Relay encapsulation.	Configure the Router as a DCE.
description text	All.	Add an Interface Description to the Configuration.
disable	All.	Disable a Physical Interface.
ds0-options	DS-0 interfaces.	Channelized Interfaces Overview.
e1-options	E1 interfaces.	Configure E1 Interfaces.
e3-options	E3 interfaces.	Configure E3 Interfaces.
encapsulation type	All interface types except aggregated Ethernet, loopback, and multicast tunnel.	Configure Interface Encapsulation.
fastether-options	Fast Ethernet interfaces.	Configure Ethernet Physical Interface Properties.
gigether-options	Gigabit Ethernet interfaces.	Configure Ethernet Physical Interface Properties.
hold-time up milliseconds down milliseconds	All interface types except aggregated SONET/SDH, GRE tunnel, and IP tunnel.	Damp Interface Transitions.
interface-type type	Channelized QPP interfaces.	Channelized Interfaces Overview.
keepalives <down-count number> <interval seconds> <up-count number>	Aggregated SONET/SDH, DS-0, E1, E3, SONET, T1, and T3 interfaces.	Configure Keepalives.
link-mode mode	Management Ethernet (fxp0) and Fast Ethernet interfaces.	Configure the Link Characteristics.
lmi	Interfaces with Frame Relay encapsulation.	Configure Frame Relay Keepalives.
lmi-type (ansi | itu)	Interfaces with Frame Relay encapsulation.	Configure Frame Relay Keepalives.
local-name name	Interfaces with PPP encapsulation.	Configure PPP Challenge Handshake Authentication Protocol.
mac mac-address	Management Ethernet interface (fxp0).	Configure the MAC Address on the Management Ethernet Interface.
minimum-links	Multilink and link services interfaces.	Configure Multilink and Link Services Interfaces.
mtu bytes	All interface types except Management Ethernet (fxp0), loopback, multilink, and multicast tunnel.	Configure the Media MTU.
multiservice-options	Passive monitoring interfaces.	Configure Multiservice Physical Interface Properties.
no-keepalives	Interfaces with PPP, Frame Relay, or Cisco HDLC encapsulation.	Configure Keepalives.
no-partition partition-number	Channelized QPP interfaces.	Channelized Interfaces Overview.
oc-slice oc-slice-range	Channelized OC-12 QPP interfaces.	Configure Channelized OC-12 Interfaces.
partition partition-number	Channelized QPP interfaces.	Channelized Interfaces Overview.
passive	Interfaces with PPP encapsulation.	Configure PPP Challenge Handshake Authentication Protocol.
ppp-options	Interfaces with PPP encapsulation.	Configure PPP Challenge Handshake Authentication Protocol.
receive-bucket	All interface types except ATM, Fast Ethernet, and Gigabit Ethernet.	Configure Receive and Transmit Leaky Bucket Properties.
sonet-options	SONET interfaces.	Configure SONET/SDH Physical Interface Properties.
speed (10m | 100m)	Management Ethernet interface (fxp0) and the Fast Ethernet 12-port and 48-port PIC.	Configure the Interface Speed.
(syslog | no-syslog)	Passive monitoring interfaces.	Configure Multiservice Physical Interface Properties.
t1-options	T1 interfaces.	Configure T1 Interfaces.
t3-options	T3 interfaces.	Configure T3 Interfaces.
timeslots time-slot-range	Channelized T1 QPP and Channelized E1 QPP interfaces.	Channelized Interfaces Overview.
traceoptions	All.	Trace Operations of an Individual Router Interface.
transmit-bucket	All interface types except ATM, Fast Ethernet, and Gigabit Ethernet.	Configure Receive and Transmit Leaky Bucket Properties.
(traps | no-traps)	All.	Enable or Disable SNMP Notifications on Physical Interfaces.
vlan-tagging	Fast Ethernet and Gigabit Ethernet interfaces.	Configure 802.1Q VLANs.