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Hierarchy Level


Ensure that all the member links in an aggregated Ethernet (AE) interface between a multihomed customer edge (CE) device and its multihoming peer provider edge (PE) devices take the same designated forwarder (DF) election role per Ethernet segment (ES). The behavior with this option is called port-based DF election with EVPN multihoming.

You can't configure this statement and the df-election-granularity per-esi-vlan statement at the same time. If you configure one of these statements when the other is already set, the CLI replaces the existing setting with the new one.

With active-standby multihoming, if the CE device has an AE interface that shares member links with both the active and standby peer PE devices, you must include the lacp-oos-on-ndf option with this statement. By default, the multihomed CE device load balances traffic toward the peer PE devices among all the AE links on the ES. The lacp-oos-on-ndf option ensures that the member link to the PE device that isn't the DF (the non-DF) remains in LACP Waiting state so the device only sends traffic on the link to the DF PE device. Otherwise, if the CE device sends part of the traffic to the non-DF, the non-DF doesn't forward it and the network loses some traffic.


You cannot enable the sync-reset statement at the [edit interfaces name aggregated-ether-options lacp] level when you have the lacp-oos-on-ndf statement enabled.



In an EVPN single-active configuration, the PE device that is the non-DF will send LACP out-of-sync packets to the multihomed CE device. As a result, LACP goes down on the CE device, and the CE device does not send traffic on the links connected to the non-DF.

If the connection between a CE device and the DF PE device fails, the DF election process selects a new DF. If the connection between the CE device and a non-DF PE device fails, the current DF assignment remains the same.

This option only applies to single-active multihoming where the CE device has an AE interface with member links to multiple peer PE devices associated with an ESI. The CLI doesn't allow you to configure this option if:

  • You configure an ES with active-active (all-active) multihoming.

  • The interface is not an AE interface.

  • You didn't enable LACP on the AE interface.

Search for a statement in CLI Explorer or click a linked statement in the Syntax section for details.

Required Privilege Level


Release Information

Statement introduced in Junos OS Release 20.4R1