User's Manual

330 Troubleshooting and Recovery
Recovering the Firmware Image
The CMC enters recover mode when a normal CMC OS boot is not possible.
In recover mode, a small subset of commands are available that allow you to
reprogram the flash devices by uploading the firmware update file,
firmimg.cmc. This is the same firmware image file used for normal firmware
updates. The recovery process displays its current activity and boots to the
CMC OS upon completion.
When you type recover and then press <Enter> at the recovery prompt,
the recover reason and available sub-commands display. An example recover
sequence may be:
recover getniccfg
recover setniccfg 192.168.0.120 255.255.255.0
192.168.0.1
recover ping 192.168.0.100
recover fwupdate -g -a 192.168.0.100
NOTE: Connect the network cable to the left most RJ45
NOTE: In recover mode, you cannot ping the CMC normally because there is no
active network stack. The recover ping <TFTP server IP> command allows you to
ping to the TFTP server to verify the LAN connection. You may need to use the
recover reset command after setniccfg on some systems.
Troubleshooting Network Problems
The internal CMC Trace Log allows you to debug CMC alerting and
networking. You can access the trace log using the CMC Web interface (see
"Using the Diagnostic Console" on page 320) or RACADM (see "Using the
RACADM Command Line Interface" on page 63 and the gettracelog
command section in the Dell Chassis Management Controller Firmware
Version 2.0 Administrator Reference Guide.
The trace log tracks the following information:
• DHCP — Traces packets sent to and received from a DHCP server.
• IP — Traces IP packets sent and received.
• DDNS — Traces dynamic DNS update requests and responses.