Using On-Board Failure Logging; Understanding Obfl; Configuring Obfl - Cisco 3845 - Security Bundle Router Software Manual
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Chapter 35
Troubleshooting
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:
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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:
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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.
OL-23400-01
Understanding OBFL, page 15
Configuring OBFL, page 15
Displaying OBFL Information, page 16
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
Cisco ME 3800X and 3600X Switch Software Configuration Guide
Using On-Board Failure Logging
35-15
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Troubleshooting
