C-Series Debugging and Diagnostics | 11752. Check air flow through the system. On the C-Series, air flows sideways from right to left. Ensure theair ducts are clean and that all fans are working correctly.3. Once the software has determined that the temperature levels are within normal limits, the card can bere-powered safely. Use the power-on command in EXEC mode to bring the line card back online.In addition, Dell Force10 requires that you install blanks in all slots without a line card to control airflowfor adequate system cooling.Recognize an under-voltage conditionIf the system detects an under-voltage condition and declares an alarm. To recognize this condition, lookfor the system messages in Message 8.This message in Message 8 indicates that the specified card is not receiving enough power. In response, thesystem first shuts down Power over Ethernet (PoE). If the under-voltage condition persists, line cards areshut down, then RPMs.Troubleshoot an under-voltage conditionTo troubleshoot an under-voltage condition, check that the correct number of power supplies are installedand their Status LEDs are lit.Trace logsIn addition to the syslog buffer, FTOS buffers trace messages which are continuously written by variousFTOS software tasks to report hardware and software events and status information. Each trace messageprovides the date, time, and name of the FTOS process. All messages are stored in a ring buffer and can besaved to a file either manually or automatically upon failover.Some trace files are automatically saved and stored in the flash:/TRACE_LOG_DIR directory for SW andHW Traces of the CP and for all Linecards. This directory contains the TRACE_CURR_BOOT directorywhich in turn contains the saved trace buffer files.Note: Exercise care when removing a card; if it has exceeded the major or shutdown thresholds, the cardcould be hot to the touch!Message 8 Under-voltage Condition System Messages%CHMGR-1-CARD_SHUTDOWN: Major alarm: Line card 2 down - auto-shutdown due to under voltage
