Which two statements regarding ACI Multi-Site are true? (Choose two.)
Correct Answer: A,D
Question 54
What is the effect of enabling the disable Remote EP learn feature?
Correct Answer: C
https://community.cisco.com/t5/application-centric/aci-disable-remote-ep-learn/td-p/4062054 When you enable this feature, it clears all the remote endpoints from the border leaf only. https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric- infrastructure/white-paper-c11-739989.html#DisableRemoteEPLearnonborderleaf When this feature is enabled, remote IP endpoint learning at the VRF instance is disabled on border leaf switches. However, border leaf may still learn remote IP endpoints from IP multicast routing packets
Question 55
Refer to the exhibit. The VMs called VM1 and VM2 are deployed on the ESXi Server in a Cisco ACI environment. VM1 has MAC address A and an IP address 192.168.1.1/24, and VM2 has MAC address B. VM1 has been shut down. Which set of actions must be taken to detect the movement of IP address 192.168.1.1/24 to MAC address B?
Correct Answer: D
GARP is used to update IP to MAC relation on upstream network devices. It is most relevant in case of vmotions or VMs/servers moving from one host to another, and the MAC address changes, but the IP remains the same. In the context of ACI, the leaf switches can detect MAC and IP address movement between leaf switch ports, leaf switches, bridge domains, and EPGs, but it does not detect the movement of an IP address to a new MAC address if the new MAC address is from the same interface and same EPG as the old MAC address. When the GARP based detection option is enabled (configuration available under the BD), Cisco ACI will trigger an endpoint move based on GARP packets if the move occurs on the same interface and same EPG. If a GARP packet comes from the same interface and same EPG, then endpoint learning is triggered only when Unicast Routing, ARP Flooding, and "GARP based detection" are all enabled for the bridge domain.
