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 {
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;
}
services-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:
- Adding an Interface Description to the Configuration
- Configuring the Link Characteristics
- Configuring the Media MTU
- Configuring Interface Encapsulation
- Configuring the PPP Challenge Handshake Authentication Protocol
- Configuring the Interface Speed
- Configuring Keepalives
- Configuring the Clock Source
- Configuring the Router as a DCE
- Configuring Receive and Transmit Leaky Bucket Properties
- Configuring Accounting for the Physical Interface
- Configuring BERT Properties
- Tracing Operations of an Individual Router Interface
- Damping Interface Transitions
- Configuring Multiservice Physical Interface Properties
- Enabling or Disabling SNMP Notifications on Physical Interfaces
- Disabling a Physical Interface
For information about interface-specific physical properties, see Interface Types.
Table 4 lists statements that you can use to configure physical interfaces.
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Configuring Ethernet Link Aggregation or Configuring Aggregated Ethernet Interfaces |
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Configuring the PPP Challenge Handshake Authentication Protocol |
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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) |
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E3 and T3 traffic over Asynchronous Transfer Mode (ATM) interfaces |
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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) |
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E3, T1, T3, multichannel DS3, channelized interfaces (DS3, OC12, and STM1), and channelized IQ interfaces (E1 and DS3) |
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E1, E3, T1, T3, and channelized interfaces (DS3, OC3, OC12, and STM1) |
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E1, E3, T1, T3, and channelized interfaces (DS3, OC12, and STM1) |
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Adaptive services, monitoring services, and collector interfaces |
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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) |
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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) |
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ATM2 IQ interfaces using ATM Layer 2 circuit cell-relay transport mode |
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Configuring the PPP Challenge Handshake Authentication Protocol |
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Configuring the E3 CSU Compatibility Mode and Configuring the T3 CSU Compatibility Mode |
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Adaptive services, monitoring services, and collector interfaces |
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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) |
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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, Configuring MAC Address Filtering, and Stacking and Rewriting Gigabit Ethernet IQ VLAN Tags |
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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 |
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Aggregated Ethernet, Fast Ethernet, and Gigabit Ethernet interfaces |
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Configuring ATM2 IQ VC Tunnel CoS Components and Specifying an Output Priority Map |
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Configuring E3 and T3 Parameters on ATM Interfaces, Configuring E1 Framing, and Configuring T1 Framing |
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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 |
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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 |
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Configuring Communication with Directly Attached ATM Switches and Routers |
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Configuring E1 Data Inversion and Configuring T1 Data Inversion |
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Aggregated SONET/SDH, DS0, E1, E3, SONET/SDH, T1, and T3 interfaces |
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Configuring Aggregated Ethernet Link Speed and Configuring Aggregated SONET/SDH Link Speed |
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Configuring Tunable Keepalives for Frame Relay LMI and Configuring 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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Configuring the PPP Challenge Handshake Authentication Protocol |
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DS0, E1, E3, T1, T3, Ethernet, SONET/SDH, and serial interfaces (EIA-530, V.35, and X.21) |
Configuring E1 Loopback Capability, Configuring E3 Loopback Capability, Configuring Ethernet Loopback Capability, Configuring Serial Loopback Capability, Configuring SONET/SDH Loopback Capability, Configuring T1 Loopback Capability, and Configuring T3 Loopback Capability |
Aggregated Ethernet, Fast Ethernet, and Gigabit Ethernet interfaces |
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Configuring the MAC Address on the Management Ethernet Interface |
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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) |
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Removing MPLS Labels from Incoming Packets and "Removing 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 High-level Data Link Control (HDLC) encapsulation |
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All interfaces, except ATM, channelized E1, E1, Fast Ethernet, Gigabit Ethernet, and channelized IQ |
Configuring Receive and Transmit Leaky Bucket Properties and "Configuring Receive and Transmit Leaky Bucket Properties" |
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Configuring the PPP Challenge Handshake Authentication Protocol |
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Configuring E3 and T3 Parameters on ATM Interfaces, Configuring E3 HDLC Payload Scrambling, Configuring SONET/SDH HDLC Payload Scrambling, Configuring T3 HDLC Payload Scrambling, and Examples: Configuring T3 Interfaces |
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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) |
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Removing MPLS Labels from Incoming Packets and "Removing MPLS Labels from Incoming Packets" |
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Configuring the PPP Challenge Handshake Authentication Protocol |
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Configuring Gigabit Ethernet Policers and Specifying an Output Priority Map |
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All interfaces, except ATM, channelized E1, E1, Fast Ethernet, Gigabit Ethernet, and channelized IQ |
Configuring Receive and Transmit Leaky Bucket Properties and "Configuring Receive and Transmit Leaky Bucket Properties" |
All interfaces, except ATM, Fast Ethernet, and Gigabit Ethernet |
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Removing MPLS Labels from Incoming Packets and "Removing MPLS Labels from Incoming Packets" |
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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 (except the 10-port Gigabit Ethernet PIC and the built-in Gigabit Ethernet port on the M7i platform) |
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Management Ethernet interface ( |
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Configuring E1 Start End Flags, Configuring the E3 Start End Flags, Configuring T1 Start End Flags, and Configuring the T3 Start End Flags |
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Unchannelized OC3, OC12, and OC48 SONET/SDH interfaces on T-series platforms |
Configuring Switching Between the Working and Protect Circuits |
Adaptive services, monitoring services, and collector interfaces |
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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) |
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All interfaces, except ATM, channelized E1, E1, Fast Ethernet, Gigabit Ethernet, and channelized IQ |
Configuring Receive and Transmit Leaky Bucket Properties and "Configuring Receive and Transmit Leaky Bucket Properties" |
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All interfaces, except ATM, Fast Ethernet, and Gigabit Ethernet |
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Enabling or Disabling SNMP Notifications on Physical Interfaces |
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Configuring ATM Cell-Relay Promiscuous Mode and Configuring the Maximum Number of ATM1 VCs on a VP |
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Configuring Virtual Tributary Mapping of Channelized STM1 Interfaces |
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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 be 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 Configuring Aggregated Ethernet Interfaces and Configuring Aggregated SONET/SDH Interfaces.