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Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
Chapter 35 Troubleshooting
Using On-Board Failure Logging
Using On-Board Failure Logging
You can use the on-board-failure logging (OBFL) feature to collect information about the switch. The
information includes uptime, temperature, and voltage information and helps Cisco technical support
representatives to troubleshoot switch problems.
This section has this information:
• Understanding OBFL, page 15
• Configuring OBFL, page 15
• Displaying OBFL Information, page 16
Understanding OBFL
By default, OBFL is enabled and is automatically activated five minutes after the switch boots up. It
collects information about the switch and small form-factor pluggable (SFP) modules. The switch stores
this information in the flash memory:
• CLI commands—Record of the OBFL CLI commands that are entered on a switch
• Environmental data—Unique device identifier (UDI) information for a switch and for all the
connected devices: the product identification (PID), the version identification (VID), and the serial
number
• Message—Record of the hardware-related system messages generated by a switch
• Temperature—Temperature of a switch
• Uptime data—Time when a switch starts, the reason the switch restarts, and the length of time the
switch has been running since it last restarted
• Voltage—System voltages of a switch
You should manually set the system clock, or configure it by using Network Time Protocol (NTP).
When the switch is running, you can retrieve the OBFL data by using the show logging onboard
privileged EXEC commands. If the switch fails, contact your Cisco technical support representative to
find out how to retrieve the data.
When an OBFL-enabled switch is restarted, there is a 10-minute delay before logging of new data
begins.
Configuring OBFL
To enable OBFL, use the hw-module module logging onboard [message level level] global
configuration command. Use the message level level parameter to specify the severity of the
hardware-related messages that the switch generates and stores in the flash memory.
To copy the OBFL data to the local network or a specific file system, use the copy logging onboard
module 1 destination privileged EXEC command.
Caution We recommend that you keep OBFL enabled and that you do not remove the data stored in the flash
memory.
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