H3C Technologies H3C S7500E Series Switches - Manual (Page 203)

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As the default system configurations for different channels are different, you need to disable the
output of log, trap, and debugging information of all modules on the specified channel (loghost
in this example) first and then configure the output rule as needed so that unnecessary
information will not be output.
# Configure the information output rule: allow log information of all modules with severity equal
to or higher than informational to be output to the log host.
[Sysname] info-center source default channel loghost log level informational state on
2) Configure the log host
Step 1: Log in to the log host as a root user.
Step 2: Create a subdirectory named Device under directory /var/log/, and create file info.log
under the Device directory to save logs of Device.
# mkdir /var/log/Device
# touch /var/log/Device/info.log
Step 3: Edit file /etc/syslog.conf and add the following contents.
# Device configuration messages
local5.info /var/log/Device/info.log
In the above configuration, local5 is the name of the logging facility used by the log host to
receive logs. info is the information level. The Linux system will record the log information with
severity level equal to or higher than informational to file /var/log/Device/info.log.
Be aware of the following issues while editing file /etc/syslog.conf:
z Comments must be on a separate line and begin with the # sign.
z No redundant spaces are allowed after the file name.
z The logging facility name and the information level specified in the /etc/syslog.conf file
must be identical to those configured on the device using the info-center loghost and
info-center source commands; otherwise the log information may not be output properly
to the log host.
Step 4: After log file info.log is created and file /etc/syslog.conf is modified, you need to issue
the following commands to display the process ID of syslogd, kill the syslogd process, and
restart syslogd using the -r option to make the modified configuration take effect.
# ps -ae | grep syslogd
147
# kill -9 147
# syslogd -r &