For Cisco ACI IPN (Inter-Pod Network) to manage multidestination traffic, multicast routing is a requirement. This is because multidestination traffic includes broadcast, unknown unicast, and multicast (BUM) traffic, which needs to be efficiently transported across different pods in a Cisco ACI Multi-Pod environment. Multicast routing protocols like Bidirectional Protocol-Independent Multicast (Bidir PIM) are used to handle this type of traffic1.
References :=
Cisco Application Centric Infrastructure Multi-Pod Configuration White Paper1
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