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Table 27. Cross-Reference of Internal Port Numbers to User Port Numbers (continued)
Internal Unit
Port Number
User Ports
from 0 to 31 on
Unit 0
User Ports
from 32 to 63
on Unit 1
User Ports
from 64 to 95
on Unit 2
User Ports
from 96 to 127
on Unit 3
No User Ports
on Unit 4
No User Ports
on Unit 5
35 Internal Internal Internal Internal Internal Internal
36 Internal Internal Internal Internal Internal Internal
37 Internal Internal Internal Internal Internal Internal
38 Internal Internal Internal Internal Internal Internal
39 Internal Internal Internal Internal Internal Internal
40 Internal Internal Internal Internal Internal Internal
41 Internal Internal Internal Internal Internal Internal
Environmental Monitoring
Switch components use environmental monitoring hardware to detect transmit power readings, receive power readings, and
temperature updates.
Use the commands described in this section to:
● Monitor the status of hardware components: power supplies, fan trays, and transceivers.
● Recognize and troubleshoot over-temperature conditions.
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 Z9500 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
282
Debugging and Diagnostics