ENABLING INSTANTANEOUS SWITCH FROM DEFAULT MULTICAST DISTRIBUTION TREE TO DATA MULTICAST DISTRIBUTION TREE FOR MOBILITY AND MULTIHOMING IN ETHERNET VIRTUAL PRIVATE NETWORK TENANT ROUTED MULTICAST

Techniques are described for providing an optimized way of switching from a default Multicast Distribution Tree (MDT) to a data MDT to handle two key use-cases in Ethernet Virtual Private Network (EVPN) / Tenant Routed Multicast (TRM). The first key use-case is an Ethernet Segment Identifier (ESI) failover case over a multihomed network in an EVPN fabric. The second use-case is host mobility