IPv4 inter-VLAN multicast forwarding modes for EVPN

Devices can forward IPv4 multicast traffic between VLANs in EVPN-VXLAN networks with these IP fabric architectures:

• Two-layer IP fabric in which switches function as Layer 3 gateways and Layer 2 gateways. From their central location in the IP fabric, the switches on which IRB interfaces are configured can route multicast traffic from one VLAN to another. This mode of multicast forwarding is known as centrally-routed mode.
• One-layer IP fabric in which switches function as both Layer 2 and Layer 3 gateways. From their location at the edge of the IP fabric, the switches on which IRB interfaces are configured can route multicast traffic from one VLAN to another. This mode of multicast forwarding is known as edge-routed mode.

To configure the multicast forwarding mode, you can specify the irb configuration statement with the local-remote option (centrally-routed mode) or the local-only option (edge-routed mode) in the [edit forwarding-options multicast-replication evpn] hierarchy level.