Users Guide
Displaying Port Extender Environment Information
To display environment details for each port extender, use the show environment pe pe-id
command.
Dell#show environment pe pe-id
To display information of hardware components of control bridge only, use the show environment
all command.
Dell#show environment all
Display Power Supply Status
To monitor the operational status of a power supply, use the show environment pem command.
Use the command output to verify the operation of installed power supplies. The current operational
status (up or down), power supply type, fan status and speed, and power usage are displayed. A switch
power supply is sometimes referred to as a power entry module (PEM).
Dell#show environment pem
-- Power Supplies --
Unit Bay Status Type FanStatus FanSpeed(rpm) Power Usage (W)
-----------------------------------------------------------------------------
0 0 down AC up 1376 0.0
0 1 up AC up 18848 666.0
0 2 down AC up 1312 0.0
0 3 up AC up 18880 643.0
When an under-voltage condition occurs on a power supply (for example, a power cable is removed):
• A Syslog message is displayed to inform you that the power supply is down. The power supply
number (for example, power supply 0) indicates the chassis bay in which it is installed; chassis bays
are numbered 0 to 4, starting from the leftmost bay 0. unit 0 refers to the switch itself.
Dell#00:20:34: %SYSTEM:CP %CHMGR-0-PS_DOWN: Major alarm: Power supply 0 in
unit 0 is down
Dell#00:20:53: %SYSTEM:CP %CHMGR-0-PS_DOWN: Major alarm: Power supply 2 in
unit 0 is down
• Use the show alarms command to display power-supply alarm messages.
Dell#show alarms
...
-- Major Alarms --
Alarm Type Duration
---------------------------------------------------------------------------
PEM 0 in unit 0 down 25 sec
PEM 2 in unit 0 down 6 sec
• Use the show environment pem command to display complete information on power supply
operation.
Dell#show environment pem
-- Power Supplies --
Unit Bay Status Type FanStatus FanSpeed(rpm) Power Usage (W)
-----------------------------------------------------------------------------
0 0 down AC up 1376 0.0
0 1 up AC up 18848 666.0
354
Debugging and Diagnostics