External Layer 3 multicast device for EVPN with IGMP snooping

You can connect an Ethernet VPN (EVPN) provider edge switch to an external Layer 3 device running a multicast protocol such as Protocol Independent Multicast (PIM). In this implementation, one or more provider edge switches configured with EVPN are connected to an external, that is, gateway, multicast device through a Layer 2 VLAN. To enable the PEs to forward traffic to the external domain, configure PIM-to-IGMP translation by including the pim-to-igmp-proxy upsream-interface irb-interface-name statements at the [edit routing-options multicast] hierarchy level. Additionally, this implementation supports configuring PIM on the IRB interfaces on the PE so that it functions only to forward inter-VLAN traffic within the data center. This means that you do not need to configure a PIM rendezvous point because forming PIM adjacencies is not required. The gateway device only needs to view the data center as a Layer 2 multicast domain. Include the new passive statement at the [edit protocols pim] hierarchy level to configure PIM to perform only inter-VLAN forwarding of multicast traffic.