Step 1: Check the Power Supply Environmental Status

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Step 1: Check the Power Supply Environmental Status
Action

To check the power supply environmental status, use the following JUNOS command-line interface (CLI) operational mode command:
user@host> show chassis environment
Sample Output

For M5, M10, M20, and M40 routers:
user@host> show chassis environment
Class Item                   Status     Measurement
Power Power Supply A         OK
      Power Supply B         Absent
[...Output truncated...]
For M7i and M10i routers:
user@host> show chassis environment
Class Item                   Status     Measurement
Power Power Supply 0         OK
      Power Supply 1         Absent
[...Output truncated...]
For M40e, M160, M320 and T320 routers and T640 routing nodes:
user@host> show chassis environment
Class Item                   Status     Measurement
Power PEM 0                  OK        
      PEM 1                  OK        
[...Output truncated...]
What It Means

The command output displays the status of both power supplies installed in the router.

For M5, M10, M7i, M10i, M20, and M40 routers, the command output displays the power supply slot number and status. The status can be OK, Testing (during initial power-on), Failed, or Absent. A Failed condition triggers the red alarm LED on the craft interface.

For M40e, M160, M320, and T320 routers and T640 routing nodes, the output displays the power supply slot number and status for the Power Entry Modules (PEMs). The status can be OK, Absent, or Check.

Alternative Action

For the M40e, M160, M320, and T320 routers and the T640 routing node, to display the power supply status, use the following CLI command:
user@host> show chassis environment pem
user@host> show chassis environment pem
PEM 0 status:
  State                       Online
  Temperature                 OK
  DC input                    OK
  DC output                   OK
  Load                        Less than 20 percent
  Voltage:
    48.0 V input        69028 mV
    48.0 V fan supply   48839 mV
    5.0 V bias           5013 mV
    8.0 V bias           8253 mV
PEM 1 status:
  State                       Online
  Temperature                 OK
  DC input                    OK
  DC output                   OK
  Load                        Less than 20 percent
  Voltage:
    48.0 V input        69307 mV
    48.0 V fan supply   49170 mV
    5.0 V bias           4991 mV
    8.0 V bias           8263 mV
For each PEM, the command output displays the slot number, status, temperature, DC input and output, load percentage, and voltage. You can display the status of a particular power supply by specifying the slot number.

For T320 routers and T640 routing nodes, the command output displays the PEM slot number, status, temperature, DC input status, and DC output for each Flexible PIC Concentrator (FPC), SONET Clock Generator (SCG), Control Board, and Switch Interface Board (SIB). You can display the status of a particular power supply by specifying the slot number.
user@host> show chassis environment pem
PEM 1 status:
  State                           Online
  Temperature                  33 degrees C / 91 degrees F
  DC input:                       OK
  DC Output:            Voltage   Current       Power    Load
       FPC 0              53783      3368         181      24
       FPC 1                  0         0           0       0
       FPC 2                  0         0           0       0
       FPC 3                  0         0           0       0
       FPC 4              54041      3462         187      24
       FPC 5              53883      5187         279      37
       FPC 6                  0         0           0       0
       FPC 7                  0         0           0       0
  SCG/CB/SIB              54066      4031         217      18 

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