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High Availability

  • MC-LAG emulation in an EVPN deployment (ACX7024, ACX7100-32C, ACX7100-48C, ACX7348 and ACX7509)—Starting in Junos OS Evolved Release 23.4R1, you can emulate the function of an MC-LAG in active-standby mode in an EVPN configuration without having to configure an ICCP or ICL interface. In a standard EVPN configuration, logical interfaces configured on an aggregated Ethernet interface can have different designated forwarder (DF) election roles. To emulate an MC-LAG configuration, the designated forwarder takes on the role of the aggregated Ethernet interface. The provider edge (PE) device that is the non-DF device sends LACP unsynchronized packets to the CE device. This causes LACP to go down on the CE device, and the CE device does not use the links connected to the non-DF device for sending traffic.

    To emulate MC-LAG functionality, enable the lacp-oos-on-ndf statement at the [edit interfaces interface name esi df-election-granularity per-esi] hierarchy level.

    [See per-esi.]