How to filter logs on CE series switches


Run the info-center filter-id { id | bymodule-alias modname alias } command in the system view to filter out the specified log information.
To filter out the log "ent_config_change", run the following commands:
<HUAWEI> system-view
[~HUAWEI] info-center filter-id bymodule-alias devm ent_config_change

Other related questions:
How to collect logs of a CE series switch
Log information is save in four types of log files including the diag.log, log.log, diagnose.log (one-click logs), (memory logs) files.

To analyze software issues, collect log information in the diag.log, log.log, diagnose.log (one-click logs are the most important) files.

To analyze hardware issues, collect log information in the diag.log, log.log, (memory logs, which are the most important logs) files, and other related command lines.

Collect log information using either of the following methods:

1. Collect diagnostic logs in one click.

[~HUAWEI] diagnose
[~HUAWEI-diagnose] display diagnostic-information >> diagnose.log

1. Executing the command takes about 5 minutes. Please wait.
2. The diagnose.log file is exported to the root directory of the active MPU.

< HUAWEI >cd flash:
<~HUAWEI >dir

3. Collect log information in the diag.log, log.log, and files.

[~HUAWEI] diagnose
[~HUAWEI-diagnose] collect diagnostic information
[~HUAWEI-diagnose] return
<HUAWEI >save logfile
<HUAWEI > cd logfile:
<HUAWEI >dir

You can run the mput * command to collect all logs.
[ftp]mput *

3. Run the following command lines to collect information to analyze hardware issues.

display startup
display version
display alarm active
display alarm history verbose
display device alarm hardware
display device
display device canbus (CE12800 series switches)
display device power sy
display device elabel
display device power
display health
display device board reset all (in the diagnostic view in some versions)

How are logs of CE series switches stored
Logs generated by the system are first saved in the log buffer. The system automatically saves the logs to a log file (log.log or diag.log) every 30 minutes or when the log buffer is full. You can also manually save the logs in the log buffer to the log file using the command. User logs are saved in flash:/logfile/log.log and diagnostic logs are saved in flash:/logfile/diag.log. When the size of a log file reaches 8 MB, the system compresses the log file with the file name or Slot-id and time indicate the slot number and the generation time of the log file, respectively. The storage space for user logs and diagnostic logs is limited. You can run the display logfile storage-usage command to view its size and usage. Currently, the log storage space cannot be adjusted. If the available log storage space is less than 20%, the system will delete the earliest compressed log file to release space for the latest logs.

How are logs of CE series switches' VSs stored
VSs record only user logs in the log.log file, not diagnostic logs. Log files are saved in the logfile directory of VSs. In versions earlier than V100R006C00, the Admin-VS and VSs share the flash storage space, which is not fixed and restricted by the size of the upper-level directory. In V100R006C00 and later versions, independent flash storage space is allocated for VSs. In this case, the log storage space is restricted by the VS storage size.

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