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Syntax
Description
Options
Required Privilege Level
Output Fields
Sample Output
Release Information

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monitor interface error

date_range 19-Nov-23

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Syntax

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monitor interface error

Description

You can use the monitor interface error command to display errors in packet headers that are transmitted through all network interfaces. Use the following options at the end of the command for more specific information.

Options

interface-name

(Optional) Displays packet header errors for a specified interface or interfaces. If an interface is not specified, all interfaces are monitored.

Required Privilege Level

view

Output Fields

Table 1 lists the output fields for the monitor interface error command.

Table 1: monitor interface error Output Fields
Field Name	Field Description
`CRC Errors`	Displays the number of CRC errors on the selected interfaces since you started monitoring.
`Corr errors`	Displays the number of FEC corrected errors since monitoring began.
`FEC Mode`	Displays the FEC mode configured on the interface.
`Interface Name`	Displays the interface name.
`Link Flaps`	Displays the number of link flaps observed during the current monitoring session.
`Link Status`	Displays the interface link status.
`PCS bit err sec`	Displays the PCS bit error count.
`PCS err blk sec`	Displays the number of PCS error blocks found.
`Pre-FEC BER`	Displays the pre-FEC bit error rate (BER). This is used to monitor the condition of an optical transport network (OTN) link.
`Speed`	Displays the speed of the interface.
`Since`	Displays the time since the error table was cleared/updated.
`Uncorr errors`	Displays the number of FEC uncorrected errors since monitoring began.

Sample Output

monitor interface error
monitor interface error et-1/0/1

monitor interface error

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user@host> monitor interface error

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EVOvSCAPA1-RE0-re0                  Seconds: 6          Time: 11:01:51

Interface  Speed  Link   Link   PCS bit  PCS err  CRC     FEC   Corr   Uncorr  Pre-FEC   Since
                  status flaps  err sec  blk sec  errors  mode  errors errors  BER
 et-1/0/1  400G    Up      0       0        0     0        -      -      -      -      00:25:51 ago
 et-1/0/2  400G    Up      1       0        0     0        -      -      -      -         Never
 et-1/0/3  400G    Up      1       0        0     0        -      -      -      -         Never
 et-1/0/4  400G    Up      1       0        0     0        -      -      -      -         Never
et-1/0/11  400G    Up      1       0        0     0        -      -      -      -         Never
et-1/0/12  400G    Up      1       0        0     0        -      -      -      -         Never
et-1/0/13  400G    Up      1       0        0     0        -      -      -      -         Never
et-1/0/14  400G    Up      1       0        0     0        -      -      -      -         Never

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monitor interface error et-1/0/1

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user@host>monitor interface error et-1/0/1

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EVOvSCAPA1-RE0-re0

Interface  Speed  Link   Link   PCS bit  PCS err  CRC     FEC   Corr    Uncorr  Pre-FEC   Since
                  status flaps  err sec  blk sec  errors  mode  errors  errors  BER
 et-1/0/1  400G    Up     0        0        0       0      -      -       -       -       Never

Release Information

Command introduced in Junos OS Evolved Release 22.2R1.

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