3com MSR 20-20 참조 매뉴얼

By default, information output to the log buffer is enabled with channel 4 
(logbuffer) as the default channel and a maximum buffer size of 512.

Note that the info-center logbuffer command takes effect only after the 
information center is enabled with the info-center enable command.

# Enable the system to output information to the log buffer with a default buffer 
size of 50.

<Sysname> system-view

[Sysname] info-center logbuffer size 50 

System view

None

Use the info-center logfile enable command to enable the output of system 
information to the log file.

Use the undo info-center logfile enable command to disable the output of 
system information to the log file.

By default, the output of system information to the log file is enabled.

n

# Enable the log file feature.

<Sysname> system-view

[Sysname] info-center logfile enable 

info-center logfile frequency freq-sec

System view

freq-sec: Frequency with which the system saves the log file, in the range 1 to 
86,400 seconds. The value is with devices.