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show interfaces (Logical Tunnel)

 

Syntax

Release Information

Command introduced before Junos OS Release 7.4.

Description

Display status information about the specified logical tunnel interface.

Options

interface-typeOn M Series and T Series routers, the interface type is lt-fpc/pic/port.
brief | detail | extensive | terse(Optional) Display the specified level of output.
descriptions(Optional) Display interface description strings.
media(Optional) Display media-specific information about network interfaces.
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 extensive (Logical Tunnel)

Output Fields

Table 1 lists the output fields for the show interfaces (logical tunnel) command. Output fields are listed in the approximate order in which they appear.

Table 1: Logical Tunnel show interfaces Output Fields

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. Software-Pseudo indicates a standard software interface with no associated hardware device.

All levels

Link-level type

Encapsulation used on the physical interface.

All levels

MTU

MTU size on the physical interface.

All levels

Clocking

Reference clock source: Internal or External when configured. Otherwise, Unspecified.

All levels

Speed

Speed at which the interface is running.

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

Type of link.

All levels

Link flags

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

All levels

Physical info

Information about the physical interface.

All levels

Hold-times

Current interface hold-time up and hold-time down, in milliseconds.

detail extensive

Current address

Configured MAC address.

detail extensive none

Hardware address

Hardware MAC address.

detail extensive none

Alternate link address

Backup link address.

detail extensive none

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

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 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

Input errors on the interface. The following paragraphs explain the counters whose meaning might not be obvious:

  • Errors—Sum of the incoming frame terminates and FCS errors.

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

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

  • Runts—Number of frames received that are smaller than the runt threshold.

  • Giants—Number of frames received that are larger than the giant threshold.

  • Policed discards—Number of frames that the incoming packet match code discarded because they were not recognized or not of interest. Usually, this field reports protocols that the Junos OS does not handle.

  • Resource errors—Sum of transmit drops.

extensive

Output errors

Output errors on the interface. The following paragraphs explain the counters whose meaning might not be obvious:

  • 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 (perhaps once every 10 seconds), the cable, the far-end system, or the PIC is malfunctioning.

  • Errors—Sum of the outgoing frame terminates 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 that is dropped by the ASIC's RED mechanism.

  • MTU errors—Number of packets larger than the MTU threshold.

  • 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

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

All levels

Encapsulation

Encapsulation on the logical interface.

All levels

Traffic statistics

Total number of bytes and packets received and transmitted on the logical interface. These statistics are the sum of the local and transit statistics. When a burst of traffic is received, the value in the output packet rate field might briefly exceed the peak cell rate. It takes awhile (generally, less than 1 second) for this counter to stabilize.

  • Input bytes—Rate of bytes received on the interface.

  • Output bytes—Rate of bytes transmitted on the interface.

  • Input packets—Rate of packets received on the interface.

  • Output packets—Rate of packets transmitted on the interface.

detail extensive

Local statistics

Statistics for traffic received from and transmitted to the Routing Engine. When a burst of traffic is received, the value in the output packet rate field might briefly exceed the peak cell rate. It takes awhile (generally, less than 1 second) for this counter to stabilize.

detail extensive

Transit statistics

Statistics for traffic transiting the router. When a burst of traffic is received, the value in the output packet rate field might briefly exceed the peak cell rate. It takes awhile (generally, less than 1 second) for this counter to stabilize.

detail extensive

Protocol

Protocol family configured on the logical interface, such as iso, inet6, mpls.

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 the 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 of the logical interface.

detail extensive none

Generation

Unique number for use by Juniper Networks technical support only.

detail extensive

Sample Output

show interfaces extensive (Logical Tunnel)

user@host> show interfaces lt-1/0/0 extensive