Maintaining the PTX5000 DC Power System

Purpose

For optimum performance, verify the condition of the power distribution units (PDUs), power supply modules (PSMs), DC power cables, and grounding cables.

Action

On a regular basis:

• Periodically inspect the site to ensure that the grounding and DC power cables connected to the PTX5000 are securely in place and that no moisture is accumulating near the PTX5000. To review grounding and site wiring requirements for the PTX5000, see PTX5000 Chassis Grounding Cable and Lug Specifications and Site Electrical Wiring Guidelines.

• Check the status of the PDUs by issuing the show chassis environment pdu command.

• Make sure that the DC power cables are arranged so that they do not obstruct access to other router components.

• Routinely check the status LEDs on the PDU and PSM faceplates and the craft interface to verify that the power system is functioning normally.

  During normal operation of the 60-A and 120-A DC PDU and PSM:

  • The green PDU OK LEDs light to indicate that the PDUs are functioning normally.

  • Each green DC IN LED on a 60-A DC PDU lights when the input is receiving source DC power.

  • Each green –48 V 120 A LED on a 120-A DC PDU lights when the input is receiving source DC power.

  • Each SW ON LED on a 60-A DC PDU lights when the input power switch is on.

  • Each CB ON LED on a 120-A DC PDU lights when the circuit breaker is on.

  • The green INPUT OK LED on a power supply module lights when the PSM is receiving voltage.

  • The green OUTPUT OK LED on a power supply module lights when the circuit breaker on the PDU is on.

  During normal operation of the High Capacity DC PDU and PSM:

  • The green PDU OK LEDs light to indicate that the PDUs are functioning normally.

  • Each green PSM LED, PSM_0 through PSM_7 on a PDU, lights when the input is receiving appropriate source DC power.

  • The green INPUT1 OK LED on a power supply module lights when the input 1 of the PSM is receiving voltage.

  • The green INPUT2 OK LED on a power supply module lights when the input 2 of the PSM is receiving voltage.

  • The green OUTPUT OK LED on a power supply module lights when power supply output is functioning normally.

  For more information about the PDU and PSM LEDs, see PTX5000 DC Power Distribution Unit LEDs and PTX5000 DC Power Supply Module LEDs.

• Check the red and yellow alarm LEDs and the LCD display on the craft interface. PDU and PSM failure or removal triggers an alarm that causes one or both of the LEDs to light and an error message to appear on the LCD display. You can display the associated error messages by issuing the following CLI command:

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  user@host> show chassis alarms

  For a list of possible alarm messages, see Troubleshooting the PTX5000 Power System.

• The power system requires an unobstructed airflow at both the front and rear of the chassis. Periodically check the site to ensure that both the air intake at the bottom front of the chassis and the exhaust from the PSM faceplates are unobstructed.

• To check the power usage in watts for all PDUs and PSMs, issue the show chassis power command .

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  Chassis Power        Input(V)      Used(W)
  
  Total Power                         3810
  
    PDU 0                             3810
      PSM 0
        Input 1            54          331
      PSM 1
        Input 1            54          661
      PSM 2
        Input 1            54         1432
      PSM 3
        Input 1            54         1386
  

  Issue the show chassis power detail command to check the power usage in watts for hardware components such as FPCs, fan trays, Routing Engine and Control Board, and SIB, CCG, and craft interface.

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  user@host> show chassis power detail
  Chassis Power        Used(W)
  
  Total Power            4890
  
    PDU 0                2447
      PSM 0              1292
      PSM 1               702
      PSM 2               210
      PSM 3               243
  
    PDU 1                2443
      PSM 0              1291
      PSM 1               685
      PSM 2               196
      PSM 3               271
  
  Item                 Used(W)
    Fan Tray 0            194
    Fan Tray 1            482
    Fan Tray 2            488
    RE0/CB0               107
    RE1/CB1               108
    SIB/CCG/FPD            63
    FPC 0                   0             
    FPC 1                   0
    FPC 2                   0
    FPC 3                   0
    FPC 4                   0
    FPC 5                   0
    FPC 6                   8
    FPC 7                   0