Administrator Guide

Auto reboot : Enabled
When a temperature threshold is crossed (either below or above the pre-configured value), the system logs an event that
contains information about the time when the event occurred, the type of event (minor, major, or shutdown), the current
temperature of the sensor, and the identity of the sensor. The system also logs events when the fan speeds change (increase or
decrease) as a result of changes in sensor temperature. To display the event log, use the show logging command.
The following examples display over-temperature event messages. Note that although the minimum speed for system fans is
40% of full speed, the corresponding power-supply fan speed is 60% of full speed.
00:21:47: %SYSTEM:LP %CHMGR-2-FAN_SPEED_CHANGE: Fan speed changed to 40 % of the full
speed
00:21:47: %SYSTEM:LP %CHMGR-2-PSU_FAN_SPEED_CHANGE: PSU_Fan speed changed to 60 % of the
full speed
00:27:35: %SYSTEM:LP %POLLMGR-2-SENSOR_TEMP_CHANGE: Switching Core Sensor S2,
temperature 52C, changed to Major state
When the system experiences a high temperature on any temperature sensor that exceeds the Critical threshold, a shutdown
log event is generated; for example:
Dell#Jun 18 01:57:03: %RPM1-P:CP %CHMGR-2-TEMP_SHUTDOWN_WARN: WARNING! linecard 11
temperature is 110C; approaching shutdown threshold of 110C)
Dell#Jun 18 01:57:04: %RPM1-P:CP %CHMGR-0-TEMP_SHUTDOWN_WARN: linecard 11 temperature
exceeded or equal to shutdown temperature 110C; Unit will shutdown now.Power cycle the
unit to power it on.
The identity of the sensor which caused the shutdown can be determined by displaying the system log for temperature-crossing
events (show environment thermal-sensors command).
00:16:08: %SYSTEM:LP %CHMGR-0-TEMP_SHUTDOWN_WARN: Unit 0 a temperature sensor has
exceeded its critical shutdown temperature; Unit will shutdown now. Power cycle the unit
to power it on.
After the system shuts down, it is not possible to operate the console until you reload (power cycle) the system.
NOTE:
The systems fan trays and power supplies always blow air from the front (I/O side) to the back (Utility/power
supply and fan side) of the switch. Ensure the air ducts are clean and that all fans (system fans and power-supply fans) are
working correctly. Ensure that there are fan alarms, including fan-tray and power-supply fan alarms. Use the show
alarms command to display alarm information and the show environment command to display the current operational
status of power supplies and fan-tray components.
Troubleshooting Packet Loss
Use show hardware linecard commands to troubleshoot packet loss.
● show hardware linecard cpu data-plane statistics
● show hardware party-bus port {{0-7} | all} statistics
● show hardware linecard {0-2} drops unit {0-3} port {1-104}
● show hardware linecard {0-2} unit {0-3} {counters | details | port-stats [detail] |
register | execute-shell-cmd | ipmc-replication | table-dump}
● show hardware {layer2| layer3} {e.g. acl |in acl} linecard {0-2} port—set {0-3}
● show hardware layer3 qos linecard {0-2} port—set {0-3}
● show hardware ipv6 {e.g.-acl |in-acl} linecard {0-2} port—set {0-3}
● show hardware system-flow layer2 linecard {0-2} port—set {0-3} [counters]
● clear hardware linecard {0-2} counters
● clear hardware linecard {0-2} unit {0-3} counters
● clear hardware linecard {0-2} cpu data-plane statistics
● clear hardware party-bus port {{0-7} | all} statistics
● clear hardware cp cpu {data-plane | i2c | sata-interface} statistics
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Debugging and Diagnostics