Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?



  • EVPN-MPLS E-LAN flow-aware transport (FAT) label load balancing (PTX10001-36MR, PTX10004, PTX10008, PTX10016) —Starting in Junos OS Evolved 22.2R1, you can configure provider edge (PE) devices to use FAT labels in an EVPN-MPLS routing instance, according to RFC 6391. Provider edge devices use these labels to load-balance EVPN-MPLS unicast packets across ECMP paths without needing to do deep packet inspection of the MPLS payload. This feature supports E-LAN with single-homing and multi-homing active/standby and active/active topologies and supports the VLAN-based, VLAN-bundle, and VLAN-aware bundle EVPN-MPLS variants.

    To enable load balancing using FAT labels in an evpn routing instance:

    • Configure the flow-label-static statement at the [edit routing-instances routing-instance-name protocols evpn hierarchy level on PE devices to insert FAT flow labels into pseudowire packets sent to remote PE devices.

    • Configure the flow-label statement at the [edit routing-instances routing-instance-name protocols evpn hierarchy level on PE devices to signal flow-label capability in the EVPN Layer 2 Attributes Extended Community by setting the flow-label (F) bit in the EVPN Type 3 route.

    [See flow-label and flow-label-static.]

  • Symmetric IRB with EVPN Type 2 routes (ACX7100, PTX10001-36MR, PTX10004, PTX10008, PTX10016, QFX5130-32CD, and QFX5700)—Starting in Junos OS Evolved Release 22.2R1, you can enable symmetric IRB EVPN Type 2 routing in an Ethernet VPN–Virtual Extensible LAN (EVPN-VXLAN) edge-routed bridging (ERB) overlay fabric. With the symmetric routing model, leaf devices can route and bridge traffic on both ingress and egress sides of a VXLAN tunnel. Leaf devices use a transit VXLAN network identifier (VNI) and Layer 3 (L3) interfaces on the associated VLAN to exchange traffic across the VXLAN tunnels.

    We support this feature with vlan-aware and vlan-based MAC-VRF instance service type configurations. To enable this feature, you must also configure EVPN Type 5 routing with L3 VRF instances to establish intersubnet reachability among the EVPN devices.

    [See Symmetric Integrated Routing and Bridging with EVPN Type 2 Routes in EVPN-VXLAN Fabrics and irb-symmetric-routing.]