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Verifying That Uplink Failure Detection Is Working Correctly

 

Purpose

Verify that the switch disables the downlink interface when it detects an uplink failure.

Action

  1. View the current uplink failure detection status:
    user@switch> show uplink-failure-detection
    Note

    The asterisk (*) indicates that the link is up.

  2. Disable the uplink interface:
    [edit]

    user@switch# set interface xe-0/0/0 disable
  3. Save the configuration on the switch.
  4. View the current uplink failure detection status:
    user@switch> show uplink-failure-detection

Meaning

The output in Step 1 shows that the uplink interface is up, and hence that the downlink interface is also up, and that the status of Failure Action is Inactive.

The output in Step 4 shows that both the uplink and downlink interfaces are down (there are no asterisks after the interface name) and that the status of Failure Action is changed to Active. This output shows that uplink failure detection is working.