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Verifying Power Configuration and Use

Purpose

Verify on an EX Series switch:

  • The power redundancy and line card priority settings
  • The PoE power budgets for line cards that support PoE
  • Whether the N+1 or N+N power requirements are being met
  • Whether the switch has sufficient power for a new line card or an N+N configuration

Action

Enter the following command:

Example output for an EX6200 switch:

        PSU  0     (EX6200-PWR-AC2500)                 :    2500 W   Online
        PSU  1     (EX6200-PWR-AC2500)                 :    2500 W   Online
        PSU  2     (EX6200-PWR-AC2500)                 :    2500 W   Online
        PSU  3     (EX6200-PWR-AC2500)                 :    2500 W   Online
        Total Power supplied by all Online PSUs  :   10000 W
        Power Redundancy Configuration           :     N+1
        Power Reserved for the Chassis           :     500 W
  Fan Tray Statistics            Base power    Power Used
  FTC  0                         :     300 W      43.04 W
  FPC Statistics                  Base power   Power Used   PoE power   Priority
  FPC  1   (EX6200-48P)          :     220 W      49.47 W      1440 W       1
  FPC  2   (EX6200-48P)          :     220 W      47.20 W       800 W       2
  FPC  3   (EX6200-48P)          :     220 W    1493.57 W      1440 W       0
  FPC  4   (EX6200-SRE64-4XS)    :     100 W      51.38 W         0 W       0
  FPC  5   (EX6200-SRE64-4XS)    :     100 W      50.28 W         0 W       0
  FPC  6   (EX6200-48P)          :     220 W      49.38 W       800 W       6
  FPC  8   (EX6200-48P)          :     220 W      61.41 W      1440 W       9
  FPC  9   (EX6200-48T)          :     150 W      12.49 W         0 W       9

        Total (non-PoE) Power allocated          :    1750 W
        Total Power allocated for PoE            :    5920 W
        Power Available (Redundant case)         :    5750 W
        Total Power Available                    :    2515 W

Example output for an EX8200 switch:

       PSU  0     (EX8200-AC2K)                  :    1200 W  Online
       PSU  1     (EX8200-AC2K)                  :    1200 W  Online
       PSU  2     (EX8200-AC2K)                  :    1200 W  Online
       PSU  3     (EX8200-AC2K)                  :    1200 W  Online
       Total Power supplied by all Online PSUs   :    4800 W
       Power Redundancy Configuration            :     N+1
       Power Reserved for the Chassis            :    1600 W
  FPC Statistics                            Base power    PoE power   Priority
  FPC  0   (EX8200-48T)                    :     350 W          0 W      2
  FPC  1   (EX8200-2XS-40P)                :     387 W        300 W      0
  FPC  2   (EX8200-48PL)                   :     267 W        350 W     15
  FPC  4   (EX8200-2XS-40P)                :     387 W        300 W      1
  FPC  5   (EX8200-48TL)                   :     230 W          0 W     15
  FPC  6   (EX8200-48TL)                   :     230 W          0 W     15

      Total (non-PoE) Power allocated          :    3451 W
      Total Power allocated for PoE            :     950 W
      Power Available (Redundant case)         :     149 W
      Total Power Available                    :     510 W

Meaning

  • Example output for an EX6200 switch —The online power supplies can supply a total of 10,000 W to the switch. The switch is configured for N+1 redundancy, which means 7500 W of redundant power can be supplied. The Power Available (Redundant case) field shows that the switch is meeting the N+1 power requirements, with an additional 5750 W available. This value is calculated by subtracting all power allocations except PoE power allocations from redundant power (7500 W).

    The total amount of power available on the switch is 2515 W. This value is calculated by subtracting all power allocations, including PoE power allocations, from the total power (10,000 W). On a switch with PoE line cards, if Total Power Available is 0, some or all of the PoE line cards might not be allocated their configured PoE power budgets, which means power to some or all PoE ports might be disabled.

    The power priority order of the line cards, from highest priority line card to the lowest priority line card, is 4, 5, 3, 1, 2, 6, 8, 9. Slots 4 and 5, which contain the Switch Fabric and Routing Engine (SRE) modules, always have highest priority, even if a lower-numbered slot, such as slot 3 in this example, has a priority of 0. Should two or more 2500 W power supplies fail, power management will remove or reduce the PoE power allocations from the PoE line cards in the following order to balance the power budget: 8, 6, 2, 1, and 3.

    The Power Used values for the fan tray and line cards shows the actual power being consumed for these components at the time the command was executed. These values are for your information only; power management uses allocated power, which is based on the maximum power the component might consume, and not actual power consumed, in determining its power budget.

  • Example output for an EX8200 switch—The online power supplies can supply a total of 4800 W to the switch. The switch is configured for N+1 redundancy, which means 3600 W of redundant power can be supplied. The Power Available (Redundant case) field shows that the switch is meeting the N+1 power requirements, with an additional 149 W available. This value is calculated by subtracting all power allocations except PoE power allocations from redundant power (3600 W). Because 149 W is insufficient power for a line card, another line card cannot be added to the switch while maintaining N+1 redundancy.

    The total amount of power available on the switch is 510 W. This value is calculated by subtracting all power allocations, including PoE power allocations, from the total power (4800 W). On a switch with PoE line cards, if Total Power Available is 0, some or all of the PoE line cards might not be allocated their configured PoE power budgets, which means power to some or all PoE ports might be disabled.

    The power priority order of the line cards, from highest priority line card to the lowest priority line card, is 1, 4, 0, 2, 5, 6. Should one or more 1200 W power supplies fail, power management will remove or reduce the PoE power allocations from the PoE line cards in the following order to balance the power budget: 2, 4, and 1.

Published: 2015-05-15