This is a draft cheat sheet. It is a work in progress and is not finished yet.
IP MulticastVTEPs within a VNI join a configured control-plane multicast group. | BUM traffic is sent to all VTEPs within the VNI over the configured multicast-group. | Arista supports multicast decapsulation to interoperate with third-party VTEP(s). | The underlay needs to be multicast capable which makes the deployment limited. | Recommended for deployments where Arista VTEPs need to interop with legacy third-party VTEPs that support only multicast underlay for BUM traffic handling. |
| | CloudVision eXchange (CVX)Locally learned MACs and VNI binding published to CVX. | CVX dynamically distributes state to remote VTEPs. | MAC address learning is via CVX control plane. | Automated provisioning of each VTEP’s flood-list. | No manual overhead for the flood-list when adding/removing VTEP(s). | Reduction in flooded traffic as there’s no flood and learning process. | OVSDB support to allow easily integrate into third-party controller in the future. | High-Availability (HA) Cluster support for resiliency. | Recommended for both small and large deployments where manual flood-list configuration could be a lot of overhead. | Recommended for cases where there’s a requirement to integrate with third-party controllers such as NSX, Nuage, OpenStack, etc. |
| | Head End Replication with static flood-set (HER)BUM traffic within a VNI is replicated and transmitted unicast to each of the VTEPs in the flood-list for that VNI. | Replication carried out on the ingress VTEP. | MAC address learning occurs via the standard flood and learn process. | Flood-list needs to be edited on all the VTEPs when adding/removing VTEP(s). | No requirement for IP multicast in the underlay. | Recommended for small deployments where there’s a handful of VLANs and VTEPs, and in cases where flood-set changes are minimal. |
| | Ethernet VPN (EVPN)MP-BGP is used to distribute local MAC address and MAC/IP bindings to VTEPs. | Reduction in flooded traffic with ARP suppression in IRB mode. This facilitates more efficient use of underlay bandwidth. | Dynamic MAC distribution and VNI learning; configuration can be BGP intensive. | Support for third-party VTEP(s) with standards-based MP-BGP approach. | Operates outside the CVX model (controller-less). | Recommended for both small and large deployments where standards-based control plane is a requirement. |
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