User's Manual

312 Troubleshooting and Recovery
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 306) or RACADM (see "Using the
RACADM Command Line Interface" on page 69 and "gettracelog" on
page 359).
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.
The trace log may also contain CMC firmware-specific error codes that are
related to the internal CMC firmware, not the managed system’s operating
system.
NOTE: The CMC will not echo an ICMP (ping) with a packet size larger than
1500 bytes.
Disabling a Forgotten Password
CAUTION: Many repairs may only be done by a certified service technician. You
should only perform troubleshooting and simple repairs as authorized in your
product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered
by your warranty. Read and follow the safety instructions that came with the
product.