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::::{cfgcmd} set interfaces {{ var0 }} \<interface\> evpn uplink

::::

  When all the underlay links go down the PE no longer has access
  to the VxLAN +overlay. To prevent blackholing of traffic the
  server/ES links are protodowned on the PE.

  A link can be setup for uplink tracking via the following example:

  .. code-block:: none

    set interfaces {{ var0 }} {{ var1 }} evpn uplink