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Configuring Interfaces for Uplink Failure Detection (CLI Procedure)

 

You can configure uplink failure detection on EX Series switches to help ensure balanced traffic flow. Using this feature, switches can monitor and detect link failure on uplink interfaces and can propagate the failure to downlink interfaces so that servers connected to those downlink interfaces can switch over to secondary interfaces.

Follow these configuration guidelines:

  • You can configure a maximum of 48 groups for each switch.

  • You can configure a maximum of 48 uplink interfaces and 48 downlink interfaces in each group.

  • You can configure physical links and logical links in separate groups.

  • Ensure that all the interfaces in the group are up. If the interfaces are down, uplink failure detection does not work.

Note

Routed VLAN interfaces (RVIs) cannot be configured as uplink interfaces to be monitored.

To configure uplink failure detection on a switch:

  1. Specify a name for the group:
    [edit protocols]

    user@switch# set uplink-failure-detection group group-name
  2. Add an uplink interface to the group:
    [edit protocols]

    user@switch# set uplink-failure-detection group group-name link-to-monitor interface-name
  3. Repeat Step 2 for adding each uplink interface to the group.Note

    An interface can be configured as link-to-monitor in multiple groups.

  4. Add a downlink interface to the group:
    [edit protocols]

    user@switch# set uplink-failure-detection group group-name link-to-disable interface-name
  5. Repeat Step 4 for adding each downlink interface to the group.
Note

After you have configured a group, use the show uplink-failure-detection group group-name command to verify that all interfaces in the group are up.