01-10-2018 11:30 AM - edited 03-08-2019 01:22 PM
VXLAN Support Multicast Service overlay (L2 vxlan, and inter Vxlan)or not ?, if support please explain configuration Multicast source Vxlan xx to Receiver Vxlan YY & Vxlan XX
Thank you.
03-16-2018 04:51 AM
Hello Saringkarn,
VXLAN support Multicast Service overlay (L2 vxlan, and inter vxlan)or not
VXLAN does support L2 VXLAN and inter VXLAN and the configuration usually takes place between two VTEP's when the communication needs to take place with the VNI segment , between two VNI spread across the overlay network.
07-17-2018 08:15 PM
The abstraction by using a VXLAN-like overlay does not inherently change the Flood & Learn behavior introduced by Ethernet. In typical deployments of VXLAN, BUM (Broadcast, Unicast, Multicast) traffic is forwarded via layer-3 multicast in the underlay that in turn aids in the learning process so that subsequent traffic need not be subjected to this “flood” semantic. A control-plane is required to minimize the flood behavior and proactively distribute End-Host information to participating entities (typically called Virtual Tunnel End Points aka VTEPs) in the same segment – learning.
Control-plane protocols are mostly employed in the layer-3 routing space where predominantly IP prefix information is exchanged. Over the past years, some of the well-known routing protocols have been extended to also learn and exchange Layer-2 MAC addresses. An early technology adoption with MAC addresses in a routing-protocol was Cisco’s OTV (Overlay Transport Virtualization), which employed IS-IS to significantly reduce flooding across Data Center Interconnects (DCI).
Multi-Protocol BGP (MP-BGP) introduced a new Network Layer Reachability Information (NLRI) to carry both, Layer-2 MAC and Layer-3 IP information at the same time. By having the combined set of MAC and IP information available for forwarding decisions, optimized routing and switching within a network becomes feasible and the need for flood to do learning get minimized or even eliminated. This extension that allows BGP to transport Layer-2 MAC and Layer-3 IP information is called EVPN – Ethernet Virtual Private Network.
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