Huawei AR Series Operating manual

Quick Maintenance
Huawei AR Series Routers
Issue: 07 (2020-06-02)

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Contents
Before You Start
How to Quickly
Maintain the AR G3
Routers
Solution to Device Login Failure
References 13
Fault Information
Collection and Feedback
Risky Operations
11
9
3
2
1

Risky Operations
Hardware-Related Risky Operations
Remove or install cables inside a cabinet.
Remove or install cards without an ESD wrist strap.
Remove the active SRU.
Press the RST button of the SRU.
Software-Related Risky Operations
Run the reboot command to restart the router.
Run the reset slot command to reset cards.
Run the power off slot command to power off cards.
Run the shutdown command to shut down physical ports.
Run the format command to format the storage device.
Run the delete command to delete files from the storage device.
Run the reset command to reset protocols.
Change the authentication method or user login password of the console port or VTY users.
1
The AR150&AR160&AR200 series, AR510 series, AR2201-48FE, and AR2202-
48FE do not support the reset slot and power off slot commands; the AR510
series do not support the format command.

Before You Start
Before you take over the maintenance of the router, you are advised to:
1Obtain the network's
topology diagram and data plans (including ports, VLANs, and IP addresses),
print them, and paste them in your equipment room for quick reference.
2Print the following
contact information and paste it nearby your workplace.
Contact method of the agent who is responsible for constructing your network and providing
service
3Prepare the
tools and cables that you may use during device maintenance.
4Visit Huawei enterprise technical support website (http://support.huawei.com/enterprise/)to
register an account . Then you can browse or download more product documents, cases, and
announcements, and receive push messages from the website.
No. Item Description
1 Cable
Maintenance terminal
Instruments and meters
An RS232 serial cable: used to log in to the device through the console port.
Serial to USB converter: used to connect the USB port of the maintenance terminal to the
console port of the router.
Two straight-through cables: used to commission the management port or other services.
Multiple fibers and SFP/eSFP/SFP+ optical modules: used to connect the router to other
network devices.
A maintenance terminal can be a portable computer with serial communication software
installed. You can log in to the AR router through the maintenance terminal.
Optical power meter: used to test optical parameters of optical ports (such as optical
power and receive sensitivity).
2
3
2
4
This document uses the command outputs of V200R005C20 as an example. If
your AR router is not running V200R005C20, the actual command outputs may
be different. This document will provide the important version differences.

How to Quickly Maintain the AR
G3 Routers
Start
Check indicators and
rectify the fault.
Check alarms on the
AR router and rectify
the fault.
Check the health
status of the router
and rectify the fault.
Check card status
and rectify the fault.
Is the fault
rectified?
Collect and report
the fault
information.
End
Yes No
The overall AR G3 router maintenance process is as follows:
3
To check the alarms, health status, card status, and record fault information,
you must log in to the router through the console port, Telnet, or STelnet. (For
how to log in to the router, see Configuration Guide - Basic Configuration .) If
you fail to log in to the router, see Solution to Device Login Failure.

Check Indicator Status
Check whether the status of each indicator is normal. If an indicator is in abnormal state, record the
fault information and find out the fault handling methods according to the indicator status and
meanings in Hardware Description .If the fault cannot be rectified, contact your agent or Huawei
enterprise technical support hotline.
The following table lists the normal status of each indicator on the router.
4
Note: For the meanings, status, and status description of each indicator, see the Hardware
Description .
Category Indicator Normal State
100 W AC PoE
power module
Power module
running
indicator
SRU
SYS
ACT
Slow blinking green
Steady green: active SRU; off: standby SRU
Steady blue
•350 W AC
power module
•350 W DC
power module
STATUS Steady green
PWR
TEMP
Steady green
Steady green
150 W RPS
power module FAN Steady green
Fan module STATUS Slow blinking green
OUTPUT Steady green: cold backup; blinking green: power supply
Interface card STAT Slow blinking green (9ES2 and 4ES2G-S cards: steady green)

Check for Critical or Major Alarms on the Router
5
Log in to the router and run the display alarm active command to view the alarm status on the
router . Check whether any critical or major alarms exist.
The alarms on the router are classified into critical, major, minor, warning, indeterminate, and
cleared alarms. The critical and major alarms must be handled immediately. Handle these alarms
according to the Alarm Handling . If the alarms cannot be cleared, contact your agent or Huawei
enterprise technical support hotline.
If a network management system (NMS) has been deployed, check the alarms
on the NMS. For details, see the NMS product documents.
<Huawei> display alarm active | include Major
A/B/C/D/E/F/G/H/I/J
A=Sequence, B=RootKindFlag(Independent|RootCause|nonRootCause)
C=Generating time, D=Clearing time
E=ID, F=Name, G=Level, H=State
I=Description information for locating(Para info, Reason info)
J=RootCause alarm sequence(Only for nonRootCause alarm)
1/Independent/2014-10-02 21:38:10/2014-10-02 21:39:00/0xff8c205c/hwCPUUtilizat
ionRising/Major/End/OID 1.3.6.1.4.1.2011.5.25.219.2.14.1 CPU utilization exceede
d the pre-alarm threshold.(Index=9, HwEntityPhysicalIndex=9, PhysicalName="SRU B
oard 0", EntityThresholdType=0, EntityThresholdWarning=80, EntityThresholdCurren
t=85, EntityTrapFaultID=144896)

Check the Health Status of the Router
6
Log in to the router and run the display health command to check the health status of the router .
1View the temperature information and check whether the temperature status of each present card
is NORMAL.
2View the power information and check whether the status of each present power supply is Supply.
<Huawei> display health
------------------------------------------------------------------------------------------------------------------
Slot Card Sensor No. SensorName Status Upper Lower Temp(C)
------------------------------------------------------------------------------------------------------------------
1 - 1 2FE TEMP NORMAL 75 0 41
2 - 1 1SA TEMP NORMAL 74 0 54
3 - 1 1CPOS-155M TEMP NORMAL 90 0 52
4 - 1 1ADSL-A/M TEMP NORMAL 70 0 49
5 - 1 8FE1GE TEMP NORMAL 85 0 57
8 - 1 1STM4 TEMP NORMAL 74 0 39
11 - 1 SRU40 TEMP NORMAL 70 0 52
If the temperature is abnormal, check whether the ambient temperature in the equipment room is
normal, whether the heat dissipation channel in the chassis is blocked, and whether all fan
modules are working properly. Take appropriate measures accordingly. If the fault cannot be
rectified, record the fault information and contact your agent or Huawei enterprise technical
support hotline.
--------------------------------------------------------------------------------------------------
PowerNo Present Mode State Current(A) Voltage(V) Power(W)
--------------------------------------------------------------------------------------------------
9 YES AC Supply N/A 12 350
10 NO N/A N/A N/A N/A N/A
If the power status is abnormal, check whether the power supply is switched on and whether the
power cable is loose, and replace the problematic power supply. If the fault cannot be rectified,
record the fault information and contact your agent or Huawei enterprise technical support
hotline.
3View the fan information and check whether the register status of each fan is YES.
----------------------------------------------------------------------------------
FanId FanNum Present Register Speed Mode
----------------------------------------------------------------------------------
12 [1-5] YES YES 35% AUTO
1 2130
2 2100
3 2100
4 2160
5 2130
If the fan status is abnormal, check whether the fan module is properly connected, whether the
fan blades are blocked, and whether dust is accumulated on the fans. If the preceding situations
occur, reinstall the fan modules or clean the fan blades. If other situations occur, replace the fan
module.
If the fault cannot be rectified, record the fault information and contact your agent or Huawei
enterprise technical support hotline.

5View the memory information. The memory usage of each present card should be lower than 60%.
System Memory Usage Information:
System memory usage at 2014-10-10 22:02:51 330 ms
---------------------------------------------------------------------------------------------------------
SlotID Total Memory(MB) Used Memory(MB) Used Percentage Upper Limit
---------------------------------------------------------------------------------------------------------
2 176 3 1% 95%
3 55 3 5% 90%
5 176 20 11% 95%
8 55 3 5% 90%
11 1400 353 25% 95%
If the memory usage is too high, observe the memory usage for 5-10 minutes. If the memory
usage is still high, contact your agent or Huawei enterprise technical support hotline.
7
4View the CPU usage information. The CPU usage of each present card should be lower than 80%.
System CPU Usage Information:
System cpu usage at 2014-10-10 22:02:50 250 ms
-------------------------------------------------------------------------------
SlotID CPU Usage Upper Limit
-------------------------------------------------------------------------------
2 4% 80%
3 3% 80%
5 4% 80%
8 4% 80%
11 16% 80%
If the CPU usage is too high, observe the CPU usage for 5-10 minutes. If the CPU usage is still high,
contact your agent or Huawei enterprise technical support hotline.
6View the storage media usage information. The storage media usage should be lower than 80%.
System Disk Usage Information:
System disk usage at 2014-10-10 22:02:51 380 ms
-------------------------------------------------------------------------------------------------
SlotID Device Total Memory(MB) Used Memory(MB) Used Percentage
-------------------------------------------------------------------------------------------------
11 sd1: 1882 1033 54%
flash: 2 0 32%
If the storage media usage exceeds 80%, delete redundant files. For details, see the Configuration
Guide - Basic Configuration .
The AR100&AR120&AR150&AR160&AR200 series , AR100-S&AR110-S&AR120-
S&AR150-S&AR160-S&AR200-S series and AR510 series do not support query of the
temperature and fan module.

Check the Card Status
8
Log in to the router and run the display device command to view card status .
<Huawei> display device
AR2240's Device status:
Slot Sub Type Online Power Register Alarm Primary
-------------------------------------------------------------
1 - 2FE Present PowerOn Registered Normal NA
2 - 1SA Present PowerOn Registered Normal NA
3 - 1CPOS-155M Present PowerOn Registered Normal NA
4 - 1ADSL-A/M Present PowerOn Registered Normal NA
5 - 8FE1GE Present PowerOn Registered Normal NA
6 - - Present PowerOff Unregistered - NA
8 - 1STM4 Present PowerOn Registered Normal NA
11 - SRU40 Present PowerOn Registered Normal Master
9 - PWR350A Present PowerOn Registered Normal NA
12 - FAN Present PowerOn Registered Normal NA
Check the following items:
Whether the Online value is Present.
Whether the Power value is PowerOn.
Whether the Register value is Registered.
Whether the Alarm value is Normal.
If the card status is abnormal, record the fault information and contact your agent or Huawei
enterprise technical support hotline.

9
Fault Information
Collection and Feedback
When you detect errors on your router, collect fault information in real time and take the
corresponding measures.
Fault information includes:
 Basic fault information : fault occurrence time, symptom, severity, impact, network topology,
measures that have been taken, and effect
 Router running status : device name, version, current configuration, and interface information
 Log information : logs recorded when faults occur
Provide the collected information to your agent or Huawei technical support engineers.
Collect Fault Basic Information
When a fault occurs, collect the following fault basic information :
No. Item Collection Method
1
5
Fault occurrence time
Symptom
Impact
Networking
Measures that have
been taken
Record the time when the fault occurs, in minutes.
Record the fault symptom and detailed information.
Record the severity of the fault and impacted services.
Draw a networking diagram, including the upstream and downstream devices
and connected ports.
Record the measures that have been taken and effect of the measures
(including command execution procedure and output).
2
3
4
Collect Router Running Information
Log in to the router and run the display diagnostic-information command to collect router running
information , including startup configuration, current configuration, port information, time, and system
version.
<Huawei> display diagnostic-information dia-info.txt
This operation will take several minutes, please wait.........................
................................................................................
........................
Info: The diagnostic information was saved to the device successfully.
The generated configuration file is saved in the default directory. You can run the dir command in
the user view to check whether the configuration file is generated.
You can transfer the configuration file to your computer through TFTP, FTP, or SFTP to facilitate
information query and feedback. For details, see the Configuration Guide - Basic Configuration .

10
Collect Logs
Device logs involve user operations, system faults, and system security issues. Logs are classified into
user logs and diagnostic logs. After logging in to the router, obtain the user logs and diagnostic logs
as follows:
<Huawei> save logfile //Collect logs of common users.
<Huawei> system-view
[Huawei] diagnose
[Huawei-diagnose] save diag-logfile //Collect diagnostic logs.
[Huawei-diagnose] terminal diag-logging //Enable diagnostic log debugging.
[Huawei-diagnose] info-center create logbook sd1:/logfile/logbook.xml //Create a data dictionary file.
You can transfer the files from sd1:/logfile to your computer through TFTP, FTP, or SFTP to facilitate
information query and feedback. For details, see the Configuration Guide - Basic Configuration .
The root directory for storing information is sd1:/ on the AR2220, AR2240, and
AR3260, and is flash:/ on other models.

11
Solution to Device Login Failure
If you fail to log in to the router through Telnet or STelnet, log in to the router through the console
(also called serial) port and check the Telnet or STelnet configuration.
If you still fail to log in to the router through the console port, you cannot perform any operations
related to CLI. In this situation, you need to perform the following operations:
Before performing the following operations, ensure that the user service
is interrupted. If the user service is not interrupted, these operations will
affect user service. Collect the fault information and contact your agent
or Huawei enterprise technical support hotline.
1Check and recover the power supply system.
If the indicators of all cards are off and the fans do not work (listening to the noise), the power
supply system fails.
1. Check the router or power supply switch. If your router has multiple power modules installed,
at least one power module must be switched on.
2. Check the PWR indicator of the power module. If the indicator is off, the power module input
is abnormal. Request the electrician to recover the power lines in the equipment room, rack,
or cabinet.
3. Check the running indicator of the power supply. If the indicator is off, the power module
output is abnormal. Replace the power supply.
4. Check the STATUS indicator of the power supply. If the indicator is on, the power module is
abnormal. Replace the power supply.
5. If the cards cannot be powered on and no error is found in the preceding checks, contact your
agent or Huawei enterprise technical support hotline.
2Check and modify the communication parameters of the COM port on your computer.
Check whether the communication parameters of the COM port are the same as the those of the
router's console port. If not, modify the communication parameters.
The default settings of the router's console port parameters include 9600 bps, 8 data bits, 1 stop
bit, no parity check, and no flow control (the actual settings may be different).

12
4Restart the router.
If the fault cannot be rectified after you remove/reinstall or replace the SRU, you can restart the
router. Power off the router, and then power on it after 3 minutes.
5Seek technical support.
If the preceding methods are ineffective, contact your agent or Huawei enterprise technical
support hotline.
3Remove/reinstall or replace the SRU.
If the power supply system and console port work properly, the SRU may be faulty. If your router
has two SRUs installed, remove/reinstall the problematic SRU. If your router has only one SRU
installed, replace it with a new one.

References
The following table lists more information about device maintenance.
Item Link
Browse or download AR
series router documents. Product Documentation
Knowledge Base - Enterprise Networking
HUAWEI CONNECT FOR ENTERPRISE
HUAWEI CONNECT FOR ENTERPRISE
Search for the
AR series router cases in
the case library.
Ask questions in the
enterprise support
community.
13
Post your questions in
the technical forum.