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Configuring 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 {
traceoptions {
file filename <files number> <size size> <world-readable | no-world-readable>
<match regexp>;
flag flag <disable>;
}
interface-name {
accounting-profile name;
aggregated-ether-options {
(flow-control | no-flow-control);
lacp mode {
periodic interval;
}
link-protection {
(enable | disable);
revert;
}
link-speed speed;
(loopback | no-loopback);
minimum-links number;
source-address-filter {
mac-address
}
(source-filtering | no-source-filtering);
}
aggregated-sonet-options {
link-speed speed | mixed;
minimum-links number;
}
atm-options {
cell-bundle-size cells;
ilmi;
linear-red-profiles profile-name {
high-plp-max-threshold percent;
low-plp-max-threshold percent;
queue-depth cells high-plp-threshold percent low-plp-threshold percent;
}
mpls {
pop-all-labels {
required-depth number;
}
}
pic-type (atm1 | atm2);
plp-to-clp;
promiscuous-mode {
vpi vpi-identifier;
}
scheduler-maps map-name {
forwarding-class class-name {
epd-threshold cells plp1 cells;
linear-red-profile profile-name;
priority (high | low);
transmit-weight (cells number | percent number);
}
vc-cos-mode (alternate | strict);
}
vpi vpi-identifier {
maximum-vcs maximum-vcs ;
oam-liveness {
up-count cells;
down-count cells;
}
oam-period (seconds | disable);
shaping {
(cbr rate | rtvbr peak rate sustained rate burst length | vbr peak rate sustained rate burst length);
queue-length number ;
}
}
}
clocking clock-source;
data-input (system | interface interface-name);
dce;
serial-options {
clock-rate rate;
clocking-mode (dce | dte | loop);
control-polarity (negative | positive);
cts-polarity (negative | positive);
dcd-polarity (negative | positive);
dce-options {
control-signal (assert | de-assert | normal);
cts (ignore | normal | require);
dcd (ignore | normal | require);
dsr (ignore | normal | require);
dtr signal-handling-option;
ignore-all;
indication (ignore | normal | require);
rts (assert | de-assert | normal);
tm (ignore | normal | require);
}
dsr-polarity (negative | positive);
dte-options {
control-signal (assert | de-assert | normal);
cts (ignore | normal | require);
dcd (ignore | normal | require);
dsr (ignore | normal | require);
dtr signal-handling-option;
ignore-all;
indication (ignore | normal | require);
rts (assert | de-assert | normal);
tm (ignore | normal | require);
}
dtr-circuit (balanced | unbalanced);
dtr-polarity (negative | positive);
encoding (nrz | nrzi);
indication-polarity (negative | positive);
line-protocol protocol;
loopback mode;
rts-polarity (negative | positive);
tm-polarity (negative | positive);
transmit-clock invert;
}
description text;
dialer-options {
pool pool-name <priority priority>;
modem-options {
init-command-string initialization-command-string;
}
}
disable;
ds0-options {
bert-algorithm algorithm;
bert-error-rate rate;
bert-period seconds;
byte-encoding (nx56 | nx64);
fcs (16 | 32);
idle-cycle-flag (flags | ones);
invert-data;
loopback payload;
start-end-flag (filler | shared);
}
e1-options {
bert-error-rate rate;
bert-period seconds;
fcs (16 | 32);
framing (g704 | g704-no-crc4 | unframed);
idle-cycle-flag (flags | ones);
invert-data;
loopback (local | remote);
start-end-flag (filler | shared);
timeslots time-slot-range;
}
e3-options {
atm-encapsulation (direct | plcp);
bert-algorithm algorithm;
bert-error-rate rate;
bert-period seconds;
buildout feet;
compatibility-mode (digital-link | kentrox | larscom) <subrate value>;
fcs (16 | 32);
framing (g.751 | g.832);
idle-cycle-flag (filler | shared);
loopback (local | remote);
(payload-scrambler | no-payload-scrambler);
start-end-flag (filler | shared);
(unframed | no-unframed);
}
encapsulation type;
es-options {
backup-interface es-fpc/pic/port;
}
fastether-options {
802.3ad aex;
(flow-control | no-flow-control);
ingress-rate-limit rate;
(loopback | no-loopback);
source-address-filter {
mac-address;
}
(source-filtering | no-source-filtering);
}
flexible-vlan-tagging;
gigether-options {
802.3ad aex;
(asynchronous-notification | no-asynchronous-notification);
(auto-negotiation | no-auto-negotiation) remote-fault <local-interface-online | local-interface-offline>;
auto-reconnect seconds;
(flow-control | no-flow-control);
(loopback | no-loopback);
source-address-filter {
mac-address;
}
(source-filtering | no-source-filtering);
ethernet-switch-profile {
(mac-learn-enable | no-mac-learn-enable);
tag-protocol-id [ tpids ];
ethernet-policer-profile {
input-priority-map {
ieee802.1p premium [ values ];
}
output-priority-map {
classifier {
premium {
forwarding-class class-name {
loss-priority (high | low);
}
}
}
}
policer cos-policer-name {
aggregate {
bandwidth-limit bps;
burst-size-limit bytes;
}
premium {
bandwidth-limit bps;
burst-size-limit bytes;
}
}
}
}
}
(gratuitous-arp-reply | no-gratuitous-arp-reply);
hold-time up milliseconds down milliseconds;
isdn-options {
bchannel-allocation (ascending | descending);
calling-number number;
pool pool-name <priority priority>'
spid1 spid-string;
spid2 spid-string;
static-tei-val value;
switch-type (att5e | etsi | ni1 | ntdms100 | ntt);
t310 seconds;
tei-option (first-call | power-up);
}
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;
}
lsq-failure-options {
no-termination-request;
[ trigger-link-failure interface-name];
}
mac mac-address;
mlfr-uni-nni-bundle-options {
acknowledge-retries number;
acknowledge-timer milliseconds;
action-red-differential-delay (disable-tx | remove-link);
drop-timeout milliseconds;
fragment-threshold bytes;
cisco-interoperability send-lip-remove-link-for-link-reject;
hello-timer milliseconds;
link-layer-overhead percent;
lmi-type (ansi | itu);
minimum-links number;
mrru bytes;
n391 number;
n392 number;
n393 number;
red-differential-delay milliseconds;
t391 seconds;
t392 seconds;
yellow-differential-delay milliseconds;
encapsulation type;
}
mtu bytes;
multiservice-options {
(core-dump | no-core-dump);
(syslog | no-syslog);
}
native-vlan-id number;
no-gratuitous-arp-request;
no-keepalives;
no-partition {
interface-type type;
}
optics-options {
wavelength nm;
}
partition partition-number oc-slice oc-slice-range interface-type type
timeslots time-slot-range;
passive-monitor-mode;
per-unit-scheduler;
ppp-options {
chap {
access-profile name;
default-chap-secret name;
local-name name;
passive;
}
compression {
acfc;
pfc;
}
no-termination-request;
pap {
access-profile name;
local-name name;
local-password password;
passive;
}
}
receive-bucket {
overflow (discard | tag);
rate percentage;
threshold bytes;
}
redundancy-options {
primary sp-fpc/pic/port;
secondary sp-fpc/pic/port;
}
schedulers number;
serial-options {
clock-rate rate;
clocking-mode (dce | dte | loop);
control-polarity (negative | positive);
cts-polarity (negative | positive);
dcd-polarity (negative | positive);
dce-options {
control-signal (assert | de-assert | normal);
cts (ignore | normal | require);
dcd (ignore | normal | require);
dsr (ignore | normal | require);
dtr signal-handling-option;
ignore-all;
indication (ignore | normal | require);
rts (assert | de-assert | normal);
tm (ignore | normal | require);
}
dsr-polarity (negative | positive);
dte-options {
control-signal (assert | de-assert | normal);
cts (ignore | normal | require);
dcd (ignore | normal | require);
dsr (ignore | normal | require);
dtr signal-handling-option;
ignore-all;
indication (ignore | normal | require);
rts (assert | de-assert | normal);
tm (ignore | normal | require);
}
dtr-circuit (balanced | unbalanced);
dtr-polarity (negative | positive);
encoding (nrz | nrzi);
indication-polarity (negative | positive);
line-protocol protocol;
loopback mode;
rts-polarity (negative | positive);
tm-polarity (negative | positive);
transmit-clock invert;
}
services-options {
inactivity-timeout seconds;
open-timeout seconds;
syslog {
host hostname {
facility-override facility-name;
log-prefix prefix-number;
services priority-level;
}
}
}
shdsl-options {
annex (annex-a | annex-b);
line-rate line-rate;
loopback (local | remote);
snr-margin {
current margin;
snext margin;
}
}
sonet-options {
aggregate asx;
aps {
advertise-interval milliseconds;
authentication-key key;
force;
hold-time milliseconds;
lockout;
neighbor address;
paired-group group-name;
preserve-interface;
protect-circuit group-name;
request;
revert-time seconds;
switching-mode (bidirectional | unidirectional);
working-circuit group-name;
}
bytes {
c2 value;
e1-quiet value;
f1 value;
f2 value;
s1 value;
z3 value;
z4 value;
}
fcs (16 | 32);
loopback (local | remote);
mpls {
pop-all-labels {
required-depth number;
}
}
path-trace trace-string;
(payload-scrambler | no-payload-scrambler);
rfc-2615;
trigger {
defect ignore;
hold-time up milliseconds down milliseconds;
}
vtmapping (itu-t | klm);
(z0-increment | no-z0-increment);
}
speed (10m | 100m | 1g | oc3 | oc12 | oc48);
stacked-vlan-tagging;
t1-options {
bert-algorithm algorithm;
bert-error-rate rate;
bert-period seconds;
buildout value;
byte-encoding (nx56 | nx64);
fcs (16 | 32);
framing (esf | sf);
idle-cycle-flag (flags | ones);
invert-data;
line-encoding (ami | b8zs);
loopback (local | payload | remote);
remote-loopback-respond;
start-end-flag (filler | shared);
timeslots time-slot-range;
}
t3-options {
atm-encapsulation (direct | plcp);
bert-algorithm algorithm;
bert-error-rate rate;
bert-period seconds;
buildout feet;
(cbit-parity | no-cbit-parity);
compatibility-mode (adtran | digital-link | kentrox | larscom | verilink) <subrate value>;
fcs (16 | 32);
(feac-loop-respond | no-feac-loop-respond);
idle-cycle-flag value;
(long-buildout | no-long-buildout);
(loop-timing | no-loop-timing);
loopback (local | payload | remote);
(mac | no-mac);
(payload-scrambler | no-payload-scrambler);
start-end-flag (filler | shared);
}
traceoptions {
flag flag <flag-modifier> <disable>;
}
transmit-bucket {
overflow discard;
rate percentage;
threshold bytes;
}
(traps | no-traps);
unit logical-unit-number {
logical-interface-statements;
}
vlan-tagging;
}
}

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

Table 8 lists statements that you can use to configure physical interfaces.

Table 8: Statements for Physical Interface Properties

Statement

Interface Types

Usage Guidelines
802.3ad aex

Aggregated Ethernet interfaces

Configuring Ethernet Link Aggregation or Configuring Aggregated Ethernet Interfaces

access-profile name

Interfaces with Point-to-Point Protocol (PPP) encapsulation

 Configuring the PPP Challenge Handshake Authentication Protocol

accounting-profile name

All

 Configuring Accounting for the Physical Interface

acfc

Interfaces with PPP encapsulation

 Configuring a PPPoE Interface

acknowledge-retries number

Link services and voice services interfaces

JUNOS Services Interfaces Configuration Guide

acknowledge-timer milliseconds

Link services and voice services interfaces

JUNOS Services Interfaces Configuration Guide

action-red-differential-delay (disable-tx | remove-link)

Link services and voice services interfaces

JUNOS Services Interfaces Configuration Guide

advertise-interval milliseconds

SONET/SDH interfaces

 Configuring APS and MSP

aggregate

Gigabit Ethernet intelligent queuing (IQ) interfaces and Gigabit Ethernet interfaces with small form-factor pluggable transceivers (SFPs) (except the 10-port Gigabit Ethernet PIC and the built-in Gigabit Ethernet port on the M7i platform)

 Configuring Gigabit Ethernet Policers

aggregate asx

Aggregated SONET/SDH interfaces

 Configuring Aggregated SONET/SDH Interfaces

aggregated-ether-options

Aggregated Ethernet interfaces

 Configuring Aggregated Ethernet Interfaces

aggregate-ports

SONET/SDH interfaces

 Specifying OC768-over-OC192 Mode

aggregated-sonet-options

Aggregated SONET/SDH interfaces

 Configuring Aggregated SONET/SDH Interfaces

annex (annex-a | annex-b)

ATM interfaces on J-series Services Routers

 Configuring SHDSL Operating Mode on an ATM Physical Interface

aps

SONET/SDH interfaces

 Configuring APS and MSP

atm-encapsulation (direct | plcp)

E3 and T3 traffic over Asynchronous Transfer Mode (ATM) interfaces

 Configuring E3 and T3 Parameters on ATM Interfaces

atm-options

ATM1 and ATM2 IQ interfaces

 Configuring ATM Interfaces

authentication-key key

SONET/SDH interfaces

 Configuring APS and MSP

backup-interface

E1, E3, T1, T3 and Fast Ethernet

 Configuring an ISDN Dialer Interface as a Backup Interface

bandwidth-limit bps

Gigabit Ethernet IQ and Gigabit Ethernet PICs with SFPs (except the 10-port Gigabit Ethernet PIC and the built-in Gigabit Ethernet port on the M7i platform)

 Configuring Gigabit Ethernet Policers

bchannel-allocation (ascending | descending)

J-series Services Routers equipped with a Dual-Port Channelized T1/E1 PIM; for Integrated Services Digital Network Primary Rate Interfaces (ISDN PRI)

 Allocating B-Channels for Dialout

bert-algorithm algorithm

E3, T1, T3, multichannel DS3, channelized interfaces (DS3, OC12, and STM1), and channelized IQ interfaces (E1 and DS3)

 Interface Diagnostics

bert-error-rate rate

E1, E3, T1, T3, and channelized interfaces (DS3, OC3, OC12, and STM1)

 Interface Diagnostics

bert-period seconds

E1, E3, T1, T3, and channelized interfaces (DS3, OC12, and STM1)

 Interface Diagnostics

buildout value

T1 interfaces

 Configuring the T1 Buildout

buildout feet

E3 and T3 traffic over ATM interfaces

 Configuring E3 and T3 Parameters on ATM Interfaces

burst-size-limit bytes

Gigabit Ethernet IQ and Gigabit Ethernet PICs with SFPs (except the 10-port Gigabit Ethernet PIC and the built-in Gigabit Ethernet port on the M7i platform)

 Configuring Gigabit Ethernet Policers

byte-encoding (nx56 | nx64)

DS0 and T1 interfaces

 Configuring T1 Byte Encoding

bytes [ values

SONET/SDH interfaces

 Configuring SONET/SDH Header Byte Values

cbit-parity | no-cbit-parity)

T3 interfaces

 Disabling T3 C-Bit Parity Mode

cbr rate

ATM interfaces

 Defining the ATM Traffic-Shaping Profile

cell-bundle-size cells

ATM2 IQ interfaces using ATM Layer 2 circuit cell-relay transport mode

 Configuring the Layer 2 Circuit Cell-Relay Cell Maximum

chap

Interfaces with PPP encapsulation

 Configuring the PPP Challenge Handshake Authentication Protocol

cisco-interoperability send-lip-remove-link-for-link-reject

link services IQ (lsq) interfaces

JUNOS Services Interfaces Configuration Guide

classifier

Gigabit Ethernet IQ interfaces

 Specifying an Output Priority Map

clocking clock-source

ATM, DS0, E1, E3, SONET/SDH, T1, and T3 interfaces

 Configuring the Clock Source

clocking-mode (dce | dte | loop)

Serial interfaces (EIA-530 and V.35)

 Configuring the Serial Clocking Mode

clock-rate rate

Serial interfaces (EIA-530 and V.35)

 Configuring the DTE Clock Rate

compatibility-mode mode

E3 and T3 interfaces

Configuring the E3 CSU Compatibility Mode and Configuring the T3 CSU Compatibility Mode

compression

Interfaces with PPP encapsulation.

 Configuring the PPP Protocol Field Compression

control-polarity (negative | positive)

Serial interfaces (X.21)

 Configuring Serial Signal Polarities

control-signal (assert | de-assert | normal)

Serial interfaces (X.21)

 Configuring the Serial Signal Handling

core-dump | no-core-dump)

Adaptive services, monitoring services, and collector interfaces

 Configuring Multiservice Physical Interface Properties

cts (ignore | normal | require)

Serial interfaces (EIA-530 and V.35)

 Configuring the Serial Signal Handling

cts-polarity (negative | positive)

Serial interfaces (EIA-530 and V.35)

 Configuring Serial Signal Polarities

current margin

ATM interfaces on J-series Services Routers

 Configuring SHDSL Operating Mode on an ATM Physical Interface

dcd (ignore | normal | require)

Serial interfaces (EIA-530 and V.35)

 Configuring the Serial Signal Handling

dcd-polarity (negative | positive)

Serial interfaces (EIA-530 and V.35)

 Configuring Serial Signal Polarities

dce

Interfaces with Frame Relay encapsulation

 Configuring the Router as a DCE

dce-options

Serial interfaces (EIA-530, V.35, and X.21) on J-series Services Routers.

 Configuring the Serial Signal Handling

default-chap-secret name

Interfaces with Point-to-Point Protocol (PPP) encapsulation

 Configuring a Default CHAP Secret

description text

All

 Adding an Interface Description to the Configuration

dialer-options

ISDN interfaces

 Configuring ISDN Physical Interface Properties

disable

All

Disabling a Physical Interface, Tracing Operations of an Individual Router Interface, and Tracing Operations of an Individual Router Interface

down-count

ATM interfaces

 Configuring ATM Interfaces

drop-timeout milliseconds

Multilink, link services, and voice services interfaces

JUNOS Services Interfaces Configuration Guide

ds0-options

DS0 interfaces

 Channelized Interfaces Overview

dsr (ignore | normal | require)

Serial interfaces (EIA-530 and V.35)

 Configuring the Serial Signal Handling

dsr-polarity (negative | positive)

Serial interfaces (EIA-530 and V.35)

 Configuring Serial Signal Polarities

dte-options

Serial interfaces (EIA-530, V.35, and X.21) on M-series and T-series routing platforms.

 Configuring the Serial Signal Handling

dtr signal-handling-option

Serial interfaces (EIA-530 and V.35)

 Configuring the Serial Signal Handling

dtr-circuit (balanced | unbalanced)

Serial interfaces (EIA-530 and V.35)

 Configuring the Serial DTR Circuit

dtr-polarity (negative | positive)

Serial interfaces (EIA-530 and V.35)

 Configuring Serial Signal Polarities

e1-options

E1 interfaces

 Configuring E1 Interfaces

e3-options

E3 interfaces

 Configuring E3 Interfaces

encapsulation type

All interfaces, except loopback and multicast tunnel

 Configuring Interface Encapsulation

encoding (nrz | nrzi)

Serial interfaces (EIA-530, V.35, and X.21)

 Configuring Serial Line Encoding

epd-threshold cells

ATM2 interfaces

 Configuring ATM2 IQ VC Tunnel CoS Components

es-options

ES interfaces

JUNOS Services Interfaces Configuration Guide

ethernet-policer-profile

Gigabit Ethernet IQ and Gigabit Ethernet PICs with SFPs (except the 10-port Gigabit Ethernet PIC, and the built-in Gigabit Ethernet port on the M7i platform)

 Configuring Gigabit Ethernet Policers

ethernet-switch-profile

Gigabit Ethernet IQ and Gigabit Ethernet PICs with SFPs (except the 10-port Gigabit Ethernet PIC, Aggregated Ethernet with Gigabit Ethernet IQ interfaces, and the built-in Gigabit Ethernet port on the M7i platform)

Configuring Gigabit Ethernet Policers, Configuring MAC Address Filtering, and Configuring the Management Ethernet Interface

facility-override facility-name

Adaptive services interfaces

JUNOS Services Interfaces Configuration Guide

fastether-options

Fast Ethernet interfaces

 Configuring Ethernet Physical Interface Properties

fcs (16 | 32)

E1/E3, SONET/SDH, and T1/T3 interfaces

Configuring the E1 Frame Checksum, Configuring the E3 Frame Checksum, Configuring the SONET/SDH Frame Checksum, Configuring the T1 Frame Checksum, and Configuring the T3 Frame Checksum

feac-loop-respond | no-feac-loop-respond)

T3 interfaces

 Configuring the T3 FEAC Response

flow-control | no-flow-control)

Aggregated Ethernet, Fast Ethernet, and Gigabit Ethernet interfaces

 Configuring Flow Control

force

SONET/SDH interfaces

 Configuring APS and MSP

forwarding-class class-name

Gigabit Ethernet IQ and ATM2 interfaces

Configuring ATM2 IQ VC Tunnel CoS Components and Specifying an Output Priority Map

fragment-threshold bytes

Multilink, link services, and voice services interfaces

JUNOS Services Interfaces Configuration Guide

framing framing-type

10-gigabit Ethernet, SONET, E1, E3, and T1 interfaces

Configuring E3 and T3 Parameters on ATM Interfaces, Configuring E1 Framing, and Configuring T1 Framing, Configuring 10-Gigabit Ethernet Framing, and Configuring SONET Options for 10-Gigabit Ethernet Interfaces.
gigether-options

Gigabit Ethernet interfaces

 Configuring Ethernet Physical Interface Properties

(gratuitous-arp-reply | no-gratuitous-arp-reply)

Ethernet interfaces

 Configuring Gratuitous ARP

hello-timer milliseconds

Link services and voice services interfaces

JUNOS Services Interfaces Configuration Guide

high-plp-max-threshold

ATM2 interfaces

 Configuring Linear RED Profiles

high-plp-threshold percent

ATM2 interfaces

 Configuring ATM2 IQ VC Tunnel CoS Components

hold-time milliseconds

SONET/SDH interfaces

 Configuring APS and MSP

hold-time up milliseconds down milliseconds

All interfaces, except aggregated SONET/SDH, generalized routing encapsulation (GRE) tunnel, and IP tunnel

Damping Interface Transitions and Configuring SONET/SDH Defect Triggers to Be Ignored

host hostname

Adaptive services interfaces

JUNOS Services Interfaces Configuration Guide

ieee802.1p premium [values]

Gigabit Ethernet IQ interfaces

 Specifying an Input Priority Map

idle-cycle-flag value

E1, E3, T1, and T3 interfaces

Configuring the E1 Idle Cycle Flag, Configuring the E3 Idle Cycle Flag, Configuring the T1 Idle Cycle Flag, and Configuring the T3 Idle Cycle Flag

ignore-all

Serial interfaces (EIA-530, V.35, and X.21)

 Configuring the Serial Signal Handling

ilmi

ATM interfaces

 Configuring Communication with Directly Attached ATM Switches and Routers

inactivity-timeout seconds

Adaptive services interfaces

JUNOS Services Interfaces Configuration Guide

indication (ignore | normal | require)

Serial interfaces (X.21)

 Configuring the Serial Signal Handling

indication-polarity (negative | positive)

Serial interfaces (X.21)

 Configuring Serial Signal Polarities

ingress-rate-limit rate

8-port, 12-port, and 48-port Fast Ethernet interfaces

 Configuring the Ingress Rate Limit

init-command-string initialization-command-string;

For USB ports (umd0) on J4350 and J6350 Services Routers.

 Specifying a USB Modem Interface

input-priority-map

Gigabit Ethernet IQ interfaces

 Specifying an Input Priority Map

interface-type type

Channelized IQ interfacesISDN interfaces

 Channelized Interfaces Overview

 Configuring ISDN Physical Interface Properties

invert-data

DS0, E1, and T1 interfaces

Configuring E1 Data Inversion and Configuring T1 Data Inversion

isdn-options

ISDN interfaces

 Configuring ISDN Logical Interface Properties

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

Aggregated SONET/SDH, DS0, E1, E3, SONET/SDH, T1, and T3 interfaces

 Configuring Keepalives

lacp mode

Aggregated Ethernet interfaces

 Configuring Aggregated Ethernet LACP

line-encoding (ami | b8zs)

T1 interfaces

 Configuring T1 Line Encoding

line-protocol protocol

Serial interfaces (EIA-530, V.35, and X.21)

 Configuring the Serial Line Protocol

line-rate line-rate

ATM interfaces on J-series Services Routers

 Configuring SHDSL Operating Mode on an ATM Physical Interface

linear-red-profile profile-name

ATM2 interfaces

 Configuring ATM2 IQ VC Tunnel CoS Components

linear-red-profiles profile-name

ATM2 interfaces

 Configuring ATM2 IQ VC Tunnel CoS Components

link-layer-overhead percent

AS PIC link services IQ interfaces (lsq)

JUNOS Services Interfaces Configuration Guide

link-mode mode

Management Ethernet (fxp0) and Fast Ethernet interfaces

 Configuring the Link Characteristics

link-speed speed

Aggregated Ethernet and aggregated SONET/SDH interfaces

Configuring Aggregated Ethernet Link Speed and Configuring Aggregated SONET/SDH Link Speed

lmi lmi-options

Interfaces with Frame Relay encapsulation

Configuring Tunable Keepalives for Frame Relay LMI and JUNOS Services Interfaces Configuration Guide

lmi-type (ansi | itu)

Link services interfaces and interfaces with Frame Relay encapsulation

 Configuring Frame Relay Keepalives

local-name name

Interfaces with PPP encapsulation

 Configuring the PPP Challenge Handshake Authentication Protocol

lockout

SONET/SDH interfaces

 Configuring APS and MSP

log-prefix prefix-number

Adaptive services interfaces

JUNOS Services Interfaces Configuration Guide

(long-buildout | no-long-buildout)

T3 interfaces

 Configuring the T3 Line Buildout

(loop-timing | no-loop-timing)

Channelized IQ interfaces

 Configuring the Channelized T3 Loop Timing

loopback mode

DS0, E1, E3, T1, T3, Ethernet, SONET/SDH, ATM interfaces on J-series Services Routers, serial interfaces (EIA-530, V.35, and X.21), and 10-gigabit Ethernet interfaces in WAN PHY mode

Configuring E1 Loopback Capability, Configuring E3 Loopback Capability, Configuring Ethernet Loopback Capability, Configuring Serial Loopback Capability, Configuring Channelized IQ SONET/SDH Loop Timing, Configuring T1 Loopback Capability, Configuring T3 Loopback Capability, Configuring SHDSL Operating Mode on an ATM Physical Interface, and Configuring SONET Options for 10-Gigabit Ethernet Interfaces

(loopback | no-loopback)

Aggregated Ethernet, Fast Ethernet, and Gigabit Ethernet interfaces