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How to Locate a Device or Port Using the Chassis Beacon

By default, when a network port and its associated link are active, the status LED for that port blinks green at a rate of 8 blinks per second. With the chassis beacon feature, you can use the request chassis beacon command to slow the current rate at which the status LED blinks green to 2 blinks per second. The slower and steadier green light acts as a beacon that you, as a network administrator in a remote office, can enable to guide a network installer in a busy data center or lab to a Juniper Networks device or port on the device.

You can use the following options with the chassis beacon feature:

  • Turn on the beacon for:

    • 5 minutes (default)

    • A specified number of minutes (1 through 120)

  • Turn off the beacon:

    • Immediately

    • After a specified number of minutes (1 through 120) elapses

You can use these options on all network ports on an FPC or just one network port on an FPC.

To turn the beacon on or off on a Virtual Chassis, you must:

  • Issue the request chassis beacon command on the primary switch in the Virtual Chassis.

  • When specifying the FPC slot number, use the target Virtual Chassis member number.

You can slow the rate at which the status LED blinks green to 2 blinks per second. The slower and steadier green light acts as a beacon that guides a network installer in a busy data center or lab to a Juniper Networks device or port on the device.

This topic covers the available options in the following use cases:

Turning On the Chassis Beacon For the Default Interval

You can turn on the chassis beacon for the default interval, which is 5 minutes.

  1. Turn on the chassis beacon using one of the following commands:
    1. For all network ports on a specified FPC:
    2. For a specified network port on an FPC:

    After you turn on the chassis beacon, you can expect the following behavior:

    • The chassis beacon overrides the current state of the status LED for all or the specified network port on the FPC.

    • If you turn on the beacon for only one network port, the status LEDs for the remaining network ports on the FPC are turned off.

    • Unless you issue a command to explicitly turn off the chassis beacon before the default interval is over, it turns off after 5 minutes. The state of the status LED for all ports or the specified port returns to the state it was in before you turned on the chassis beacon.

  2. If you want to turn the chassis beacon off before the 5-minute interval is over, use one of the following commands:
    1. For all network ports on a specified FPC:
    2. For a specified network port on an FPC:

Turning On the Chassis Beacon For a Specified Interval

You can turn on the chassis beacon for 1 through 120 minutes.

  1. Turn on the chassis beacon using one of the following commands:
    1. For all network ports on a specified FPC:
    2. For a specified network port on an FPC:

    After you turn on the chassis beacon, you can expect the following behavior:

    • The chassis beacon overrides the current state of the status LEDs for all or one network port on the FPC.

    • If you turn on the chassis beacon for only one network port, the status LEDs for the remaining network ports on the FPC are turned off.

    • The chassis beacon stays on until you explicitly issue a command to turn it off.

  2. You can turn off the chassis beacon immediately or after a specified time interval (1 through 120 minutes) is over.
    1. To turn off the chassis beacon immediately, use one of the following commands:

      For all network ports on a specified FPC:

      OR

      For a specified network port on an FPC:

    2. To turn off the chassis beacon after a specified time interval of 1 through 120 minutes is over, use one of the following commands:

      For all network ports on a specified FPC:

      OR

      For a specified network port on an FPC:

      After you turn off the chassis beacon, the state of the status LED for all or one port on the FPC returns to the state it was in before you turned on the chassis beacon.