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Home Documentation Junos OS Junos CLI Reference CLI Reference D

Junos CLI Reference

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Junos CLI Reference
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df-election-granularity

date_range 03-Jun-24
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Syntax

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df-election-granularity {
    per-esi {
        lacp-oos-on-ndf;
    }
    per-esi-vlan;
    per-evi;
}

Hierarchy Level

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[edit interfaces name esi],
[edit interfaces name unit number esi]

Description

Configure the designated forwarder (DF) election granularity per member link for an aggregated Ethernet interface in an EVPN multihoming configuration.

The per-esi lacp-oos-on-ndf setting enables EVPN multihoming when:

  • The peer provider edge (PE) devices in the multihomed Ethernet segment (ES) operate in active-standby (single-active) mode.

  • The connection to the multihomed CE device is an aggregated Ethernet (AE) link with member links that connect to more than one of the peer PE devices.

When an aggregated Ethernet interface connects to the DF and you enable this option with single-active multihoming, the aggregated Ethernet interface emulates the behavior of an MC-LAG configuration (without requiring you to configure an ICCP or ICL interface). This behavior is different from in a standard EVPN multihoming configuration, where the logical interfaces you configure on an aggregated Ethernet interface can take different designated forwarder election roles.

In an EVPN single-active configuration, the provider edge (PE) device that is not the DF (the non-DF) sends LACP out-of-sync packets to the CE device. As a result, LACP goes down on the CE device, and the CE device doesn't send traffic on the links connected to the non-DF.

If the connection between a multihomed 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.

Note:

You can't configure both the per-esi option and the per-esi-vlan option with this 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 you've configured.

Options

The options are explained separately. You can click the linked statements in the Syntax section or search for a statement in CLI Explorer.

Required Privilege Level

interface

Release Information

Statement introduced in Junos OS Release 20.4R1.

Related Documentation

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