Introduction; General Guidelines; Collecting Log And Operating Information - H3C S6805 Series Troubleshooting Manual

Introduction

This document provides information about troubleshooting common software and hardware issues
with the S6805, S6825, S6850, and S9850 switch series.
This document is not restricted to specific software or hardware versions.

General guidelines

IMPORTANT:
To prevent an issue from causing loss of configuration, save the configuration each time you finish
configuring a feature. For configuration recovery, regularly back up the configuration to a remote
server.
When you troubleshoot the switch, follow these general guidelines:
•
To help identify the cause of the issue, collect system and configuration information, including:
Symptom, time of failure, and configuration.

Network topology information, including the network diagram, port connections, and points

of failure.
Common log messages and diagnostic log information. For more information about

collecting this information, see
Physical evidence of failure:

−
−
Steps you have taken, such as reconfiguration, cable swapping, and reboot.

Output from the commands executed during the troubleshooting process.

•
To ensure safety, wear an ESD wrist strap when you replace or maintain a hardware
component.
•
If hardware replacement is required, use the release notes to verify the hardware and software
compatibility.

Collecting log and operating information

IMPORTANT:
To facilitate quick troubleshooting, execute the following commands:
•
info-center enable—Enables the information center. By default, the information center is enabled.
•
info-center logfile enable—Enables the log file feature so the system outputs logs to log files. By default,
the log file feature is enabled.
•
info-center diagnostic-logfile enable—Enables saving diagnostic logs to the diagnostic log file. By
default, saving diagnostic logs to the diagnostic log file is enabled.
During operation, the device generates common log messages and diagnostic log messages to
record information about routine operations and operating status.
that the system uses to store the log messages. You can export these files by using FTP, TFTP, or
USB.
In an IRF system, log files are stored on the master device. Multiple devices will have log files if
master/subordinate switchovers have occurred. You must collect log files from all member devices.
Photos of the hardware.
Status of the LEDs.
"Collecting log and operating
1
information."
Table 1 shows the types of files