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Additional configuration is necessary to enable ARP/ND suppression, provision such as the provision of inter-subnet routing, and so on. The configuration depends on the deployment scenario. You can also configure various other BGP parameters depending on your network requirements.
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EVPN MAC Learning Process
Traditionally, MAC address learning in VXLANs is achieved through flooding. In EVPN where BGP is used as the control plane for VXLANs, the problem of flooding can be eliminated through sending EVPN Type-2 advertisement between VTEPs assuming the ARP and ND suppression is enabled. In Figure 2, when Host 1 is first plugged into R1, Host 1 will start sending ARP and other basic networking traffic like DHCP. When R1 receives a packet from Host 1 for the first time, it will record its MAC address in its local MAC address table. Also, R1 will advertise an EVPN Type-2 route to R2. The route includes the local EVPN instance of R1, the VTEP IP address, the Host 1 MAC address and the L2VNI.
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