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show interfaces (M Series, MX Series, T Series Routers, and PTX Series Management and Internal Ethernet)

 

List of Syntax

Syntax (M Series, MX Series, T Series, and PTX Series Routers Management Ethernet Interface)

Syntax (M Series, MX Series, T Series, and PTX Series Routers Internal Ethernet Interface)

Syntax (M Series, MX Series, T Series, and PTX Series Routers Management Ethernet Interface)

Syntax (M Series, MX Series, T Series, and PTX Series Routers Internal Ethernet Interface)

Release Information

Command introduced before Junos OS Release 7.4.

Command introduced on PTX Series Packet Transport Routers for Junos OS Release 12.1.

Description

(M Series, T Series, TX Matrix Plus, and PTX Series devices only) Display status information about the management Ethernet and internal Ethernet interfaces.

Options

em0 | fxp0 | mgmtre0(M Series, MX Series, T Series, and PTX Series) Display standard information about the management Ethernet interface. For supported Ethernet interface by chassis and Routing Engine, see Supported Routing Engines by Router.
bcm0 | em0 | em1 | fxp1 | fxp2 | ixgbe0 | ixgbe1(M Series, MX Series, T Series, and PTX Series) Display standard information about the internal Ethernet interfaces. See Supported Routing Engines by Router for the internal Ethernet interface names for each Routing Engine by hardware platform.
Note

On Junos OS Evolved, the ixgbe0 and ixgbe1 internal interfaces are deprecated.

brief | detail | extensive | terse(Optional) Display the specified level of output.
descriptions(Optional) Display interface description strings.
media(Optional) Display media-specific information.
snmp-index snmp-index(Optional) Display information for the specified SNMP index of the interface.
statistics(Optional) Display static interface statistics.

Required Privilege Level

view

List of Sample Output

show interfaces brief (Management Ethernet)

show interfaces (Management Ethernet)

show interfaces (Management Ethernet [TX Matrix Plus Router])

show interfaces (Management Ethernet [PTX Series Packet Transport Routers])

show interfaces detail (Management Ethernet)

show interfaces detail (Management Ethernet [TX Matrix Plus Router])

show interfaces detail (Management Ethernet [PTX Packet Transport Routers])

show interfaces extensive (Management Ethernet)

show interfaces extensive (Management Ethernet [TX Matrix Plus Router])

show interfaces extensive (Management Ethernet [PTX Series Packet Transport Routers])

show interfaces mgmtre0 (Management Ethernet [PTX5000 Router])

show interfaces brief (Management Ethernet)

show interfaces brief (Management Ethernet [TX Matrix Plus Router])

show interfaces brief (Management Ethernet [PTX Series Packet Transport Routers])

show interfaces (Internal Ethernet)

show interfaces (Internal Ethernet [TX Matrix Plus Router])

show interfaces detail (Internal Ethernet)

show interfaces detail (Internal Ethernet [TX Matrix Plus Router])

show interfaces extensive (internal Ethernet)

show interfaces extensive (internal Ethernet [TX Matrix Plus Router])

Output Fields

Table 1 lists the output fields for the show interfaces (management) command on the M Series routers, T Series routers, TX Matrix Plus routers, and PTX Series. Output fields are listed in the approximate order in which they appear.

Table 1: show interfaces Output Fields for M Series, MX Series, T Series, and PTX Series Routers Management Ethernet Interface

Field Name

Field Description

Level of Output

Physical Interface 

Physical interface

Name of the physical interface.

All levels

Enabled

State of the interface. Possible values are described in the “Enabled Field” section under Common Output Fields Description.

All levels

Interface index

Physical interface index number, which reflects its initialization sequence.

detail extensive none

SNMP ifIndex

SNMP index number for the physical interface.

detail extensive none

Generation

Unique number for use by Juniper Networks technical support only.

detail extensive

Type

Type of interface.

All levels

Link-level type

Encapsulation type used on the physical interface.

All levels

MTU

Maximum transmission unit (MTU)—Size of the largest packet to be transmitted.

All levels

Clocking

Reference clock source of the interface.

All levels

Speed

Network speed on the interface.

All levels

Device flags

Information about the physical device. Possible values are described in the “Device Flags” section under Common Output Fields Description.

All levels

Interface flags

Information about the interface. Possible values are described in the “Interface Flags” section under Common Output Fields Description.

All levels

Link type

Data transmission type.

detail extensive none

Link flags

Information about the link. Possible values are described in the “Link Flags” section under Common Output Fields Description.

detail extensive

Physical info

Information about the physical interface.

detail extensive

Hold-times

Current interface hold-time up and hold-time down. Value is in milliseconds.

detail extensive

Current address

Configured MAC address.

detail extensive none

Hardware address

Media access control (MAC) address of the interface.

detail extensive none

Alternate link address

Backup link address.

detail extensive

Last flapped

Date, time, and how long ago the interface went from down to up. The format is Last flapped: year-month-day hour:minute:second timezone (hour:minute:second ago). For example, Last flapped: 2002-04-26 10:52:40 PDT (04:33:20 ago).

detail extensive none

Input packets

Number of packets received on the physical interface.

None specified

Output packets

Number of packets transmitted on the physical interface.

None specified

Statistics last cleared

Time when the statistics for the interface were last set to zero.

detail extensive

Traffic statistics

Number and rate of bytes and packets received and transmitted on the logical and physical interface.

  • Input bytes, Output bytes—Number of bytes received and transmitted on the interface.

  • Input packets, Output packets—Number of packets received and transmitted on the interface.

detail extensive

Input errors

  • Errors—Input errors on the interface.

  • Drops—Number of packets dropped by the output queue of the I/O Manager ASIC.

  • Framing errors—Number of packets received with an invalid frame checksum (FCS).

  • Runts—Frames received smaller than the runt threshold.

  • Giants—Frames received larger than the giant threshold.

  • Policed Discards—Frames that the incoming packet match code discarded because they were not recognized or were not of interest. Usually, this field reports protocols that Junos does not support.

  • Resource errors—Sum of transmit drops.

extensive

Output errors

  • Carrier transitions—Number of times the interface has gone from down to up. This number does not normally increment quickly, increasing only when the cable is unplugged, the far-end system is powered down and then up, or another problem occurs. If the number of carrier transitions increments quickly, possibly once every 10 seconds, the cable, the remote system, or the interface is malfunctioning.

  • Errors—Sum of outgoing frame aborts and FCS errors.

  • Drops—Number of packets dropped by the output queue of the I/O Manager ASIC. If the interface is saturated, this number increments once for every packet dropped by the ASIC RED mechanism.

  • Resource errors—Sum of transmit drops.

extensive

Logical Interface 

Logical interface

Name of the logical interface

All levels

Index

Logical interface index number, which reflects its initialization sequence.

detail extensive none

SNMP ifIndex

Logical interface SNMP interface index number.

detail extensive none

Generation

Unique number for use by Juniper Networks technical support only.

detail extensive

Flags

Information about the logical interface; values are described in the “Device Flags” section under Common Output Fields Description.

All levels

Encapsulation

Encapsulation on the logical interface.

detail extensive none

inet

IP address of the logical interface.

brief

Protocol

Protocol family configured on the logical interface (such as iso or inet6).

detail extensive none

MTU

MTU size on the logical interface.

detail extensive none

Generation

Unique number for use by Juniper Networks technical support only.

detail extensive

Route table

Route table in which this address exists. For example, Route table:0 refers to inet.0.

detail extensive

Flags

Information about the protocol family flags. Possible values are described in the “Family Flags” section under Common Output Fields Description.

detail extensive none

Addresses, Flags

Information about address flags. Possible values are described in the “Addresses Flags” section under Common Output Fields Description.

detail extensive none

Destination

IP address of the remote side of the connection.

detail extensive none

Local

IP address of the logical interface.

detail extensive none

Broadcast

Broadcast address.

detail extensive none

Generation

Unique number for use by Juniper Networks technical support only.

detail extensive

Sample Output

show interfaces brief (Management Ethernet)

user@host> show interfaces fxp0 brief

show interfaces (Management Ethernet)

user@host> show interfaces fxp0

show interfaces (Management Ethernet [TX Matrix Plus Router])

user@host> show interfaces em0

show interfaces (Management Ethernet [PTX Series Packet Transport Routers])

user@host> show interfaces em0

show interfaces detail (Management Ethernet)

user@host> show interfaces fxp0 detail

show interfaces detail (Management Ethernet [TX Matrix Plus Router])

user@host> show interfaces em0 detail

show interfaces detail (Management Ethernet [PTX Packet Transport Routers])

user@host> show interfaces detail em0

show interfaces extensive (Management Ethernet)

user@host> show interfaces fxp0 extensive

show interfaces extensive (Management Ethernet [TX Matrix Plus Router])

user@host> show interfaces em0 extensive

show interfaces extensive (Management Ethernet [PTX Series Packet Transport Routers])

user@host> show interfaces extensive em0

show interfaces mgmtre0 (Management Ethernet [PTX5000 Router])

user@host> show interfaces mgmtre0 extensive

show interfaces brief (Management Ethernet)

user@host> show interfaces fxp1 brief

show interfaces brief (Management Ethernet [TX Matrix Plus Router])

user@host> show interfaces em0 brief

show interfaces brief (Management Ethernet [PTX Series Packet Transport Routers])

user@host> show interfaces em0 brief

show interfaces (Internal Ethernet)

user@host> show interfaces fxp1

show interfaces (Internal Ethernet [TX Matrix Plus Router])

user@host> show interfaces ixgbe0

show interfaces detail (Internal Ethernet)

user@host> show interfaces fxp1 detail

show interfaces detail (Internal Ethernet [TX Matrix Plus Router])

user@host> show interfaces ixgbe0 detail

show interfaces extensive (internal Ethernet)

user@host> show interfaces fxp1 extensive

show interfaces extensive (internal Ethernet [TX Matrix Plus Router])

user@host> show interfaces ixgbe0 extensive