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To implement the Inter-Site Network (ISN) for a Cisco ACI Multi-Site deployment, the following configuration steps are essential:

Configure OSPF on all ISN routers: OSPF (Open Shortest Path First) is a routing protocol that is used to ensure that all routers in the ISN have the necessary routing information to forward packets between sites.

Configure BIDIR-PIM on all ISN routers: BIDIR-PIM (Bidirectional Protocol Independent Multicast) is used for efficient multicast traffic forwarding across the ISN. This is particularly important for Cisco ACI Multi-Site deployments as it supports the replication of broadcast, unknown unicast, and multicast (BUM) traffic across sites.

References :=

Cisco ACI Multi-Site Configuration Guide

Cisco ACI Multi-Site Architecture White Paper

To prevent frequent MAC and IP address moves between different leaf switch ports, enabling rogue endpoint control is the recommended action. This feature helps in identifying and mitigating the movement of endpoints that could potentially cause loops or other issues within the network.

For the BGP Route Reflector policy to take effect, the components that must be configured are the leaf fabric interface overrides and profiles. These configurations are necessary to establish the route reflector relationships within the BGP protocol on the leaf switches