An organization expands a Cisco ACI Multi-Pod from two to six pods and must ensure...

 In a Cisco ACI Multi-Pod environment that is expanding, spine headend replication should be configured to ensure efficient forwarding of BUM (Broadcast, Unknown unicast, Multicast) traffic across the IPN (Inter-Pod Network). This configuration optimizes the control plane scaling and ensures that BUM traffic is handled effectively, maintaining network performance and stability.

References: Implementing Cisco Application Centric Infrastructure Official Cert Guide