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To allow IP mobility between Site1 and Site2 in a Cisco ACI Multi-Site orchestrator while meeting the disaster recovery (DR) requirements and avoiding broadcast storms, the following actions should be taken:

Disable Inter-site BUM Traffic: Disabling Broadcast, Unknown unicast, and Multicast (BUM) traffic between sites helps to avoid broadcast storms that can occur when extending Layer 2 domains across multiple sites1.

Apply the L2 Stretch feature: The Layer 2 Stretch feature allows subnets to be extended across multiple sites without the need to re-IP the application servers. This supports IP mobility and enables applications to be started at a DR site using the same IP address space1.

These actions ensure that the design supports a DR solution without requiring vMotion support, allows applications to be started at a DR site without re-IPing servers, and avoids broadcast storms between the sites.

References :=

Cisco ACI Multi-Site Architecture White Paper1

Cisco Nexus Dashboard Orchestrator Overview2

When designing two data centers based on Cisco ACI technology that can extend L2/L3, VXLAN, and network policy across locations with ACI Multi-Pod, the two requirements that must be considered are:

A single APIC Cluster is required in a Multi-Pod design4.

ACI Multi-Pod requires an IP Network supporting PIM-Bidir2.

 The statement about the MTU value of MP-BGP EVPN control plane packets in Cisco ACI that is true for communication between spine nodes in different sites is that by default, spine nodes generate 9000-bytes packets to exchange endpoints routing information. As a result, the Inter-Site network should be able to carry 9000-bytes packets2. This ensures that the control plane traffic, which is not VXLAN encapsulated, can be properly handled across the sites2.

The true statement regarding ACI Multi-Pod and TEP pool is that the same TEP pool is used in all Pods. This shared TEP pool ensures consistent addressing and simplifies the management of the overlay network across multiple Pods.