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 interfacesinterface-name]hierarchy level:interfaces {interface-name{accounting-profilename;aggregated-ether-options {aggregated-ether-interface-options;}aggregated-sonet-options {aggregated-sonet-interface-options;}atm-options{atm-interface-options;}clockingclock-source;dce;descriptiontext;disable;ds0-options {ds0-interface-options;}e1-options {e1-interface-options;}e3-options{e3-interface-options;}es-options{es-interface-options;}encapsulationtype;fastether-options{fastether-interface-options;}gigether-options{gigether-interface-options;}(gratuitous-arp-reply| no-gratuitous-arp-reply);hold-timeupmillisecondsdownmilliseconds;keepalives <down-countnumber> <intervalseconds> <up-countnumber>;link-modemode;lmi{lmi-type (ansi | itu);n391dtenumber;n392dcenumber;n392dtenumber;n393dcenumber;n393dtenumber;t391dteseconds;t392dceseconds;}macmac-address;mtubytes;multiservice-options{boot-commandfilename;(core-dump | no-core-dump);(syslog | no-syslog);}no-gratuitous-arp-request;no-keepalives;no-partition {interface-typetype;}partitionpartition-numberoc-sliceoc-slice-rangeinterface-typetype{timeslotstime-slot-range;}passive-monitor-mode;per-unit-scheduler;ppp-options {chap {access-profilename;local-namename;passive;}}receive-bucket{overflow (tag | discard);ratepercentage;thresholdbytes;}serial-options {serial-interface-options;}service-options {service-interface-options;}sonet-options{sonet-interface-options;}speed(10m | 100m);stacked-vlan-tagging;t1-options {t1-interface-options;}t3-options{t3-interface-options;}traceoptions{flagflag<flag-modifier> <disable>;}transmit-bucket{overflow discard;ratepercentage;thresholdbytes;}(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 for the Physical Interface
- 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
clocking-mode(dce | dte | loop)control-polarity(positive | negative)cts-polarity(positive | negative)dcd-polarity(positive | negative)dsr(ignore | normal | require)dsr-polarity(positive | negative)dtrsignal-handling-optiondtr-circuit(balanced | unbalanced)dtr-polarity(positive | negative)encoding(nrz | nrzi)ignore-allindication(ignore | normal | require)indication-polarity(positive | negative)line-protocolprotocolloopbackmoderts(assert | de-assert | normal)rts-polarity(positive | negative)tm(ignore | normal | require)tm-polarity(positive | negative)transmit-clockinvert