300-620 Exam Results

 To have the endpoint table learn the IP addresses of endpoints in a bridge domain, unicast routing must be enabled1. This allows the bridge domain to learn the IP addresses of endpoints through the data plane1.

When deploying a new Cisco ACI Multi-Pod setup, it’s crucial to ensure that the Tunnel Endpoint (TEP) pool of the new pod is routable across the Inter-Pod Network (IPN). This allows the TEP addresses to be reachable across the pods, facilitating communication between them. Additionally, increasing the Maximum Transmission Unit (MTU) for all IPN routers is necessary to support the larger frame size required by VXLAN encapsulation, which is typically above the standard Ethernet MTU of 1500 bytes.

References :=

Cisco ACI Multi-Pod Configuration Guide

Cisco ACI Best Practices Guide

To configure communication between the EPGs in different tenants, the subnet scope should be set to “Shared between VRFs”. This allows the subnet to be shared across different VRFs, enabling communication between EPGs that are in different tenants but within the same VRF. By marking the subnet as shared, it becomes visible to other VRFs, which is necessary for inter-tenant communication1.

References :=

Learning ACI - Part 12: Inter-VRF and Inter-Tenant Communication

The group of settings required to meet the requirements for workload migration where servers will physically terminate at the Cisco ACI, but their gateway must stay in the existing network, is:

L2 Unknown Unicast: Flood

L3 Unknown Multicast Flooding: Flood

Multi Destination Flooding: Flood in BD

ARP Flooding: Enable5

These settings ensure that the bridge domain is configured to handle unknown unicast and multicast traffic appropriately, and ARP flooding is enabled to allow for the resolution of IP addresses when the gateway is outside the fabric5.

enter/aci/apic/sw/migration_guides/migrating_existing_networks_to_aci.html