Huawei S1720 Operating manual

Quick Maintenance
Issue: 02 (2017-04-30)
S1720&S2700&S3700&S5700&S6700
Series Ethernet Switches

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Contents
Before You Start 1
How to Quickly Maintain the
S1720&S2700&S3700&S5700&S6700
2
Solution to Device Login Failure 10
Risky Operations 11
References 12
Fault Information Collection and
Feedback
8

Before You Start
Before you take over the maintenance of the switch, 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 switch.
Two straight-through cables: used to commission the management port or other services.
Multiple fibers and SFP/eSFP/SFP+/QSFP+ optical modules: used to connect the switch to
other network devices.
A maintenance terminal can be a portable computer with serial communication software installed.
You can log in to the switch through the maintenance terminal.
Optical power meter: used to test optical parameters of optical ports
(such as optical power and receive sensitivity).
2
3
1
4
5This document uses the command outputs of V200R003 as an example. If your switch is not running
V200R003, the actual command outputs may be different. This document will provide the important
version differences.

How to Quickly Maintain the
S1720&S2700&S3700&S5700&S6700
Start
Check indicators
and rectify the fault.
Check alarms on
the switch and
rectify the fault.
Check the health
status of the switch
and rectify the fault.
Check the component
status of the switch and
rectify the fault.
Is the fault
rectified?
Collect and report
the fault information.
End
Yes No
The overall S1720&S2700&S3700&S5700&S6700 maintenance process is as follows:
2
To check the alarms, health status, component status, and record fault
information, you must log in to the switch through the Console port, Telnet, or
STelnet. (For how to log in to the switch, see Configuration Guide-Basic
Configuration.) If you fail to log in to the switch, 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 or the troubleshooting procedures in Troubleshooting.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 switch.
3
Note: For the meanings, status, and status description of each indicator, see the Hardware Description.
For S1720 series switches , see the Product Description.
Category Indicator Normal State
Panel
Fan module
PWR
SYS
STATUS
Steady green
Slow blinking green
Slow blinking green
Subcards STAT
Power supply Input
Output
STATUS
Steady green
Steady green
Steady green
Slow blinking green

Check for Critical or Major Alarms on the Switch
4
Log in to the switch and run the display alarm active command to view the alarm status on the switch.
Check whether any critical or major alarms exist.
<HUAWEI> display alarm active | include Critical
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)
3/Independent/2014-04-18 16:59:13-05:13/2014-04-18 16:59:17-05:13/0x502001/lin
kDown/Critical/End/OID 1.3.6.1.6.3.1.1.5.3 Interface 28 turned into DOWN state.(
AdminStatus 1,OperStatus 2,InterfaceName GigabitEthernet0/0/24)
4/Independent/2014-04-18 16:59:13-05:13/2014-04-18 16:59:17-05:13/0x502001/lin
kDown/Critical/End/OID 1.3.6.1.6.3.1.1.5.3 Interface 57 turned into DOWN state.(
AdminStatus 1,OperStatus 2,InterfaceName Vlanif4094)
The alarms on the switch are classified into critical, major, minor, and warning alarms. The critical and
major alarms must be handled immediately. Handle these alarms according to the Alarm Reference. If
the alarms cannot be cleared, contact your agent or Huawei enterprise technical support hotline.
If you have a network management system (NMS), check the alarms on the NMS.
For details, see the NMS product documents.

Check the Health Status of the Switch
5
Log in to the switch and check the health status of the switch as follows:
1Check the temperature information. The temperature (CurrentTemperature) should be between
LowLimit and HighLimit(The command changed into display temperature all in V200R005 and later
versions).
2View the power information and check whether the status of each present power supply is Normal(No
information is displayed for built-in power supplies).
3
Check fan status. The fan status should be Normal (The command changed into display fan in
V200R005 and later versions).
<HUAWEI> display environment
Environment information:
Temperature information:
SlotID CurrentTemperature LowLimit HighLimit
(deg c ) (deg c) (deg c )
0 38 0 60
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.
<HUAWEI> display power
------------------------------------------------------------
SlotID PowerNo Present Mode State Power(W)
------------------------------------------------------------
0 PWRI YES AC Normal 150
0 PWRII NO N/A N/A N/A
<HUAWEI> display fan verbose
Slot # FAN # Status Speed Rate Mode Airflow Direction
-------------------------------------------------------------------------
0 1 Normal 30 % AUTO Side-to-Back
4Check memory usage information. The memory usage should be lower than 60%.
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.
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.
<HUAWEI> display memory-usage
Memory utilization statistics at 2009-03-29 06:44:59+00:00
System Total Memory Is: 159457152 bytes
Total Memory Used Is: 85775432 bytes
Memory Using Percentage Is: 53%
If the memory usage is too high, observe the memory usage for 5-10 minutes. If the usage is still high,
contact your agent or Huawei enterprise technical support hotline.

5Check the CPU usage. The CPU usage should be lower than 80%.
<HUAWEI> display cpu-usage
CPU Usage Stat. Cycle: 60 (Second)
CPU Usage : 4% Max: 100%
CPU Usage Stat. Time : 2009-03-29 07:06:09
CPU utilization for five seconds: 4%: one minute: 4%: five minutes: 4%
Max CPU Usage Stat. Time : 2009-03-03 01:40:45.
TaskName CPU Runtime(CPU Tick High/Tick Low) Task Explanation
BOX 0% 0/ 19345c BOX Output
_TIL 0% 0/ 0 Infinite loop event task
_EXC 0% 0/ 0 Exception Agent Task
VIDL 96% 0/e606b800 DOPRA IDLE
If the usage is too high, observe the usage for 5-10 minutes. If the usage is still high, contact your
agent or Huawei enterprise technical support hotline.
6
6View the storage media usage information. The storage media usage should be lower than 80%.
<HUAWEI> dir
Directory of flash:/
Idx Attr Size(Byte) Date Time FileName
0 -rw- 14,083,796 Mar 03 2009 01:37:24 s5700ei-v200r003c00spc300.cc
1 -rw- 1,704 Mar 03 2009 01:42:07 private-data.txt
2 drw- - Oct 01 2008 00:19:13 syslogfile
3 drw- - Oct 01 2008 00:19:22 resetinfo
......
43 -rw- 12,037,660 Jan 04 2009 07:35:42 s5700ei-v100r006c00spc800.cc
44 -rw- 1,116 Mar 24 2009 09:25:15 vrpcfg_v1r6_53ei.zip
30,008 KB total (1,940 KB free)
If the storage media usage exceeds 80%, delete redundant files. For details, see the Configuration
Guide-Basic Configuration.

Check the Component Status
7
Log in to the switch and run the display device command to view component status.
<HUAWEI> display device
S5700-52C-EI's Device status:
Slot Sub Type Online Power Register Status Role
---------------------------------------
0 - 5752C Present PowerOn Registered Normal Master
3 FAN Present PowerOn Registered Normal NA
4 POWER Present PowerOn Registered Normal NA
Check the following items for each component:
Whether the Online value is Present.
Whether the Power value is PowerOn.
Whether the Register value is Registered.
Whether the Status value is Normal.
If the card status is abnormal, record the fault information and handle the fault according to the
Troubleshooting. If the fault cannot be rectified, contact your agent or Huawei enterprise technical
support hotline.

8
Fault Information Collection
and Feedback
When you detect errors on your switch, 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
Switch 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 Switch Running Information
Log in to the switch and run the display diagnostic-information command to collect switch running
information, including startup configuration, current configuration, port information, time, and system
version.
<HUAWEI> display diagnostic-information dia-info.txt
Now saving the diagnostic information to the device.............................
................................................................................
..............
Info: The diagnostic information was saved to the device successfully.
The generated configuration file is saved in the flash:/ directory by default. 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.

9
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 switch, obtain the user logs and diagnostic logs as
follows:
You can transfer the files from flash:/syslogfile/, flash:/logfile/, and flash:/resetinfo/ to your computer
through TFTP, FTP, or SFTP to facilitate information query and feedback. For details, see the
Configuration Guide - Basic Configuration.
<HUAWEI> save logfile //Collect common user logs.
<HUAWEI> system-view
[HUAWEI] diagnose
[HUAWEI-diagnose] save diag-logfile //Collect device diagnostic logs.
[HUAWEI-diagnose] terminal diag-logging //Enable diagnostic log debugging.
In V200R009 and later versions, you can only run save logfile all command to save the
logs in the user log buffer area and diagnostic log buffer area to the user log file and
diagnostic log file, respectively.

10
Solution to Device Login Failure
If you fail to log in to the switch through Telnet or STelnet, log in to the switch through the Console (also
called serial) port and check the Telnet or STelnet configuration.
If you still fail to log in to the switch through the Console port, you cannot perform any operations related
to CLI. In this situation, you need to perform the following operations:
Perform the following operations only when you confirm that the user
service has been interrupted, because 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 all indicators on the switch are off and the fans do not work (listening to the noise), the power supply
system fails.
1.Check the power supply switches. If your switch has multiple power supplies installed, at least one
power supply must be switched on.
2.Check the Input or STATUS indicator of the power supply. If the indicator is off, the power supply
input is abnormal. Request the electrician to recover the power lines in the equipment room, rack, or
cabinet.
3.Check the Output indicator of the power supply. If the indicator is off, the power supply is abnormal.
Replace the power supply.
4.If the switch 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
switch's Console port. If not, modify the communication parameters.
The default settings of the switch'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).
3Restart the switch.
Power off the switch, and then power on it.
4Seek technical support.
If the preceding methods are ineffective, contact your agent or Huawei enterprise technical support
hotline.

Risky Operations
Hardware-Related Risky Operations
Remove or install cables inside a cabinet.
Remove or install subcards when the switch is running. The subcards of some types are not hot
swappable.
Remove or install subcards without an ESD wrist strap.
Software-Related Risky Operations
Run the reboot command to restart the switch.
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.
11

References
The following table lists more information about device maintenance.
Information Link
Browse or download the
product documents. http://support.huawei.com/enterprise/productsupport?lang=zh&pid=6691593
http://support.huawei.com/enterprise/productsupport?lang=zh&pid=6691593
http://support.huawei.com/ecommunity/bbs/list_4355.html
http://support.huawei.com/ecommunity/ask/list_4355.html
Search for the cases in
the case library.
Ask questions in the enterprise
support community.
12
Post your questions in the
technical forum.