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    Powering On a DC-Powered EX9208 Switch

    Before you power on the switch, ensure that:

    Ensure that you have the following parts and tools available to power on the switch:

    To power on the switch:

    1. Connect the external management device to the master RE module's Ethernet management (<...>) port.
    2. Turn on the power to the external management device.
    3. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
    4. Verify that the power supplies are fully inserted in the chassis and that each of their handles is flush against the faceplate.
    5. Verify that the source power cables are connected to the appropriate terminal: the positive (+) source cable to the return terminal (labeled RETURN ) and the negative (–) source cable to the input terminal (labeled –48V).
    6. Switch on the dedicated customer site circuit breakers to provide power to the DC power cables.
    7. Check the INPUT OK LED is lit steadily green to verify that power is present.
    8. If power is not present:
      • Verify that the fuse is installed correctly and turn on the breaker at the battery distribution fuse board or fuse bay.
      • Check the voltage with a meter at the terminals of the power supply for correct voltage level and polarity.
    9. On each of the DC power supplies, switch the DC circuit breaker to the center position before moving it to the on () position.

      Note: The circuit breaker may bounce back to the off (O) position if you move the breaker too quickly.

      If any of the status LEDs indicates that the power supply is not functioning normally, repeat the installation and cabling procedures described in DC Power Supply Specifications for EX9208 Switches.

    10. Verify that the BREAKER ON LED glows steady green.
    11. Verify that the PWR OK LED glows steady green, indicating the power supply is correctly installed and functioning normally.

      If the power supply is not functioning normally, repeat the installation and cabling procedures described in DC Power Supply Specifications for EX9208 Switches.

      Note: After powering off a power supply, wait for at least 60 seconds before turning it back on. After powering on a power supply, wait for at least 60 seconds before turning it off.

      If the system is completely powered off when you power on the power supply, the Routing Engine boots as the power supply completes its startup sequence. If the Routing Engine finishes booting and you need to power off the system again, first issue the CLI request system halt command.

      After a power supply is powered on, it can take up to 60 seconds for status indicators—such as the status LEDs on the power supply and the show chassis command display—to indicate that the power supply is functioning normally. Ignore error indicators that appear during the first 60 seconds.

    12. On the external management device connected to the Routing Engine, monitor the startup process to verify that the system has booted properly.

    Published: 2013-04-02