User's Manual

364 Troubleshooting and Recovery
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") or RACADM (see "Using the RACADM
Command Line Interface" and the gettracelog command section in the Dell
Chassis Management Controller Administrator Reference Guide.
The trace log tracks the following information:
• DHCP — Traces packets sent to and received from a DHCP server.
• DDNS — Traces dynamic DNS update requests and responses.
• Configuration changes to the network interfaces.
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.
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.
To perform management actions, a user with Administrator privileges is
required. The CMC software has a user account password protection security
feature that may be disabled if the administrator account password is
forgotten. If the administrator account password is forgotten, it can be
recovered using the PASSWORD_RSET jumper on the CMC board.
The CMC board has a two-pin password reset connector as shown in
Figure 11-1. If a jumper is installed in the reset connector, the default
administrator account and password is enabled and set to the default
values of username: root and password: calvin. The administrator
account will be reset regardless if the account has been removed, or if
the password was changed.
NOTE: Ensure the CMC module is in a passive state before you begin.