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| Section | Objectives |
|---|---|
| Topic 1: Cisco ACI Architecture | - ACI Fabric Components
|
| Topic 2: Policy Model and Endpoint Groups | - Policy Constructs
|
| Topic 3: Automation and Programmability | - API and Integration
|
| Topic 4: Operations and Troubleshooting | - Monitoring and Management
|
| Topic 5: ACI Fabric Infrastructure | - Fabric Access Configuration
|
| Topic 6: Integration and External Connectivity | - L2/L3 Outside Connectivity
|
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NEW QUESTION # 109
An engineer is extending EPG connectivity to an external network. The external network houses the Layer 3 gateway and other end hosts. Which ACI bridge domain configuration should be used?
Answer: B
NEW QUESTION # 110
An Cisco ACI leaf switch learns the source IP address of a packet that enters the front panel port of the switch. Which bridge domain setting is used?
Answer: C
Explanation:
The "Hardware Proxy" setting optimizes unicast traffic by using a proxy to respond to ARP requests, reducing flooding. While it aids in endpoint management, it is not the setting that directly enables learning the source IP address from incoming packets.
Explanation:
The question asks which bridge domain setting is used when a Cisco ACI leaf switch learns the source IP address of a packet entering the front panel port. This involves understanding how ACI handles endpoint learning and IP address association within a bridge domain.
Requirement Analysis
When a packet enters a leaf switch's front panel port, ACI learns the source IP and MAC address of the endpoint to populate its endpoint table.
The bridge domain settings control how IP addresses are learned and routed, especially for Layer 3 traffic.
The correct setting must enable the leaf switch to associate the source IP with the endpoint.
Option Evaluation
A . Unicast Routing:
The "Unicast Routing" setting in a bridge domain enables Layer 3 routing and allows the leaf switch to learn the source IP address of a packet by associating it with the MAC address and VLAN. When enabled, the switch performs IP-to-MAC mapping and updates the endpoint database, which is the standard mechanism for learning source IP addresses from incoming traffic.
Reference:
B . L3 Unknown Multicast Flooding - Flood:
This setting controls how unknown multicast traffic is handled at Layer 3 (e.g., flooding or dropping). It is unrelated to learning the source IP address of a unicast packet entering the front panel port.
C . ARP Flooding:
ARP Flooding allows ARP requests to be flooded within the bridge domain, which helps resolve IP-to-MAC mappings for silent hosts or external devices. However, it is not the primary setting for learning the source IP of an active packet; it is a supplementary mechanism.
Final Answer Justification
A is correct because enabling "Unicast Routing" in the bridge domain allows the leaf switch to learn the source IP address of a packet entering the front panel port by associating it with the source MAC address and VLAN. This is the foundational setting for Layer 3 endpoint learning in ACI.
Primary Cisco Reference:
Cisco APIC Layer 3 Networking Configuration Guide, "Bridge Domain Unicast Routing." Cisco ACI Endpoint Group Configuration Guide, "IP Address Learning."
NEW QUESTION # 111
A Solutions Architect is asked to design two data centers based on Cisco ACI technology that can extend L2/ L3, VXLAN, and network policy across locations. ACI Multi-Pod has been selected. Which two requirements must be considered in this design? (Choose two.)
Answer: B,D
Explanation:
Section: ACI Anywhere
Explanation/Reference:
NEW QUESTION # 112
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?
Answer: D
Explanation:
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.
NEW QUESTION # 113
Refer to the exhibit. An engineer wants to initiate an ICMP ping from Server1 to Server2. The requirement is for the BD1 to enforce ICMP replies that follow the expected path. The packets must be prevented from taking the direct path from Leaf1 to Server1.
Which action must be taken on BD1 to meet these requirements?
Answer: C
Explanation:
In this topology the gateway for Server1 is outside of the ACI fabric.
NEW QUESTION # 114
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