Ace Your 300-630 CCNP Data Center Exam

When traffic to certain endpoints is dropped in a Cisco ACI fabric configured with hardware proxy, setting the L2 Unknown Unicast option to Flood for Layer 2 switched traffic can prevent this problem. This mode allows unknown unicast traffic to be flooded within the bridge domain, rather than being sent to the spine proxy and potentially discarded if the destination is unknown5.

References := Solved: Unknown Unicast in ACI Fabric - Cisco Community

 In an Active-Active Across Pods deployment mode, traffic is intelligently redirected to the firewall that currently owns the connection state, allowing for efficient use of network resources. Additionally, the connection state being unsynchronized means that each pod can independently manage its connections without relying on a centralized state, enhancing the resilience and scalability of the network1.

References := (Implementing Cisco Application Centric Infrastructure Official Cert Guide)

In the Cisco ACI fabric, to ensure that the IP address of Server S1 is learned and the IP addresses of BC1 and BC2 are not learned, one must limit IP learning to a specific subnet and suppress ARP responses from BC1 and BC2. By checking the “Limit IP learning to subnet” box (Option A), it ensures that only IPs within a defined subnet are learned, which would include Server S1’s IP but exclude BC1 and BC2 if they are outside of this subnet.Suppressing ARP response on BC1 and BC2 (Option D) prevents these devices from responding to ARP requests, which in turn prevents their IPs from being learned by other devices in the network. References := ( Implementing Cisco Application Centric Infrastructure Official Cert Guide )

 To prevent connectivity issues for EP1 when accessing an external L3Out network, it’s essential to enable IP data plane learning for the VRF and unicast routing in BD-BD2. IPdata plane learning allows dynamic endpoint learning within a VRF, ensuring accurate forwarding information for EP1. Unicast routing enables packet routing based on destination IP, facilitating proper traffic routing through the gateway.

References := Implementing Cisco Application Centric Infrastructure Official Cert Guide