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;
}
clockingclock-source;
dce;
descriptiontext;
disable;
ds0-options {
ds0-interface-options;
}
e1-options {
e1-interface-options;
}
e3-options {
e3-interface-options;
}
encapsulationtype;
es-options {
es-interface-options;
}
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);
n391dte number;
n392dce number;
n392dte number;
n393dce number;
n393dte number;
t391dte seconds;
t392dce seconds;
}
macmac-address;
mlfr-uni-nni-bundle-options{
mlfr-interface-options;
}
mtubytes;
multiservice-options{
boot-command filename;
(core-dump | no-core-dump);
(syslog | no-syslog);
}
no-gratuitous-arp-request;
no-keepalives;
no-partition {
interface-type type;
}
partitionpartition-numberoc-sliceoc-slice-rangeinterface-typetype{
timeslots time-slot-range;
}
passive-monitor-mode;
per-unit-scheduler;
ppp-options {
chap {
access-profile name;
local-name name;
passive;
}
}
receive-bucket {
overflow (discard | tag);
rate percentage;
threshold bytes;
}
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;
rate percentage;
threshold bytes;
}
(traps | no-traps);
unit {
logical-interface-statements;
}
vlan-tagging;
}
}
This chapter discusses configuration of the following physical interface properties:
- 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.
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Configure Ethernet Link Aggregation or Configure Aggregated Ethernet Interfaces |
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Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with small form-factor pluggable transceivers (SFPs) |
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Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with SFPs |
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E3, T1, T3, multichannel DS-3, channelized interfaces (DS-3, OC-12, STM-1), and channelized IQ interfaces (E1 and DS-3) |
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E1, E3, T1, T3, and channelized interfaces (DS-3, OC-3, OC-12, STM-1) |
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E1, E3, T1, T3, and channelized interfaces (DS-3, OC-12, STM-1) |
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Adaptive services, monitoring services, and collector interfaces |
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Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with SFPs |
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Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with SFPs |
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ATM2 IQ interfaces using ATM Layer 2 circuit cell-relay transport mode |
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Configure the E3 CSU Compatibility Mode and Configure the T3 CSU Compatibility Mode |
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Adaptive services, monitoring services, and collector interfaces |
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Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with SFPs |
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Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with SFPs |
Configure Gigabit Ethernet Policers, Configure MAC Address Filtering, and Stacking and Rewriting Gigabit Ethernet IQ VLAN Tags |
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Configure the E1 Frame Checksum, Configure the E3 Frame Checksum, Configure the SONET/SDH Frame Checksum, Configure the T1 Frame Checksum, and Configure the T3 Frame Checksum |
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Aggregated Ethernet, Fast Ethernet, and Gigabit Ethernet interfaces |
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Configure ATM2 IQ VC Tunnel CoS Components and Specify an Output Priority Map |
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Configure E1 Framing, Configure E3 and T3 Parameters on ATM Interfaces, and Configure T1 Framing |
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All interfaces, except aggregated SONET/SDH, GRE tunnel, and IP tunnel |
Damp Interface Transitions and Configure SONET/SDH Defect Triggers to be Ignored |
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Configure the E1 Idle Cycle Flag, Configure the E3 Idle Cycle Flag, Configure the T1 Idle Cycle Flag, and Configure the T3 Idle Cycle Flag |
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Configure Communication with Directly Attached ATM Switches and Routers |
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Aggregated SONET/SDH, DS-0, E1, E3, SONET/SDH, T1, and T3 interfaces |
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Configure Aggregated Ethernet Link Speed and Configure Aggregated SONET/SDH Link Speed |
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Configure Tunable Keepalives for Frame Relay LMI and Configure Link Services Keepalive Settings on Frame Relay LMI |
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Link services interfaces and interfaces with Frame Relay encapsulation |
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DS-0, E1, E3, T1, T3, Ethernet, SONET/SDH, and serial interfaces (EIA-530, V.35, and X.21) |
Configure Ethernet Loopback Capability, Configure E1 Loopback Capability, Configure E3 Loopback Capability, Configure SONET/SDH Loopback Capability, Configure T1 Loopback Capability, Configure T3 Loopback Capability, and Configure Serial Loopback Capability |
Aggregated Ethernet, Fast Ethernet, and Gigabit Ethernet interfaces |
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Configure the MAC Address on the Management Ethernet Interface |
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Configure the MAC Address on the Management Ethernet Interface |
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Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with SFPs |
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Remove MPLS Labels from Incoming Packets and "Remove MPLS Labels from Incoming Packets" |
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All interfaces, except management Ethernet ( |
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Adaptive services, monitoring services, and collector interfaces |
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Interfaces with PPP, Frame Relay, or Cisco HDLC encapsulation |
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All interfaces, except ATM, channelized E1, E1, Fast Ethernet, Gigabit Ethernet, and channelized IQ |
Configure Receive and Transmit Leaky Bucket Properties and "Configure Receive and Transmit Leaky Bucket Properties" |
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Configure E3 and T3 Parameters on ATM Interfaces, Configure E3 HDLC Payload Scrambling, Configure SONET/SDH HDLC Payload Scrambling, Configure T3 HDLC Payload Scrambling, and Examples: Configure T3 Interfaces |
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Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with SFPs |
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Remove MPLS Labels from Incoming Packets and "Remove MPLS Labels from Incoming Packets" |
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Configure Gigabit Ethernet Policers and Specify an Output Priority Map |
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All interfaces, except ATM, channelized E1, E1, Fast Ethernet, Gigabit Ethernet, and channelized IQ |
Configure Receive and Transmit Leaky Bucket Properties and "Configure Receive and Transmit Leaky Bucket Properties" |
All interfaces, except ATM, Fast Ethernet, and Gigabit Ethernet |
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Remove MPLS Labels from Incoming Packets and "Remove MPLS Labels from Incoming Packets" |
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JUNOS Internet Software Services Interfaces Configuration Guide |
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Aggregated Ethernet, Fast Ethernet, and Gigabit Ethernet interfaces |
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( |
Aggregated Ethernet, Fast Ethernet, Gigabit Ethernet, Gigabit Ethernet IQ, and Gigabit Ethernet interfaces with SFPs |
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Management Ethernet interface ( |
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Configure E1 Start End Flags, Configure the E3 Start End Flags, Configure T1 Start End Flags, and Configure the T3 Start End Flags |
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Unchannelized OC-3, OC-12, and OC-48 SONET/SDH interfaces on T-series platforms |
Configure Switching between the Working and Protect Circuits |
Adaptive services, monitoring services, and collector interfaces |
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Gigabit Ethernet IQ interfaces and Gigabit Ethernet interfaces with SFPs |
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All interfaces, except ATM, channelized E1, E1, Fast Ethernet, Gigabit Ethernet, and channelized IQ |
Configure Receive and Transmit Leaky Bucket Properties and "Configure Receive and Transmit Leaky Bucket Properties" |
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All interfaces, except ATM, Fast Ethernet, and Gigabit Ethernet |
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Configure Virtual Tributary Mapping of Channelized STM-1 IQ Interface |
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You specify aggregated interfaces by assigning a number for the aggregated interface. For aggregated Ethernet interfaces, configure aex as in the following example:
[edit interfaces]
ae0 {
...
}
For aggregated SONET/SDH interfaces, configure asx as in the following example:
[edit interfaces]
as0 {
...
}
The maximum number of aggregated interfaces is 16, and the assigned number can range from 0 through 15. You should not mix SONET and SDH mode on the same aggregated interface.
 |
NOTE: SONET/SDH aggregation is proprietary to the JUNOS software and might not work with other software. |
For aggregated Ethernet interfaces, you must include the vlan-tagging statement at the [edit interfaces aex] hierarchy level to complete the association.
For more information, see Configure Aggregated Ethernet Interfaces and Configure Aggregated SONET/SDH Interfaces.