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    Check the SCB LED Status

    Purpose

    To check the SCB status from the LEDs on the SCB faceplate.

    Action

    To check the SCB status, look at the LEDs on the SCB faceplate (see Figure 1).

    Figure 1: SCB LEDs

    SCB LEDs

    Table 1 describes the SCB LED states.

    Table 1: SCB LEDs

    Color

    Label

    State

    Description

    Green

    ACTIVE

    Flashing
    (pulsed with out-time proportional to traffic)

    I/O interrupts are occurring.

    Green

    RUN

    Blinking
    (slow and steady)

    SCB processor is running. Normally, the blinking is faint and becomes bright only when the SCB is processing many exceptions.

    Amber

    STAT1

    Flashing

    Internal diagnostics are running.

    Amber

    STAT2

    Flashing

    Internal diagnostics are running.

    If all four SCB LEDs are on, but dimly lit, the SCB is probably not seated properly. Tighten the captive screws at the top and bottom of the SCB card carrier.

    If the green RUN LED on the SCB is not blinking, the SCB processor is not functioning normally. The SCB might not be connected properly to the backplane. Tighten the screws at the top and bottom of the SCB card carrier. If that does not work, reinstall the SCB.

    The SCB has a reset switch on its faceplate above the LEDs. You normally do not use the reset switch. Pushing the reset switch results in a cold restart of the Packet Forwarding Engine, which causes a service interruption for a minute or two. To trip the reset switch, you must access it through a hole in the faceplate with a paper clip or other small probe.

     
     

    Published: 2012-08-20