300-630 Cisco Implementing Cisco Application Centric Infrastructure - Advanced (DCACIA) Free Practice Exam Questions (2025 Updated)

 For a full mesh Cisco ACI Multi-Site architecture, configuring the BGP-EVPN Router-ID on each spine is essential. This configuration ensures unique identification and proper routing of traffic within the overlay network1

Within Cisco ACI, when a Topology Change Notification (TCN) BPDU is received in a VLAN, the system flushes the endpoints for the associated encapsulation to ensure network stability. Additionally, BPDU filter and BPDU guard can be configured on Cisco ACI leaf edge ports to protect against potential STP issues2.

 In Cisco ACI fabric, STP BPDUs are flooded in the bridge domain VLAN. This allows the BPDUs to be propagated throughout the fabric, maintaining the STP topology2.

References := Implementing Cisco Application Centric Infrastructure Official Cert Guide

Removing pre-existing Fibre Channel over Ethernet (FCoE) configurations from Nexus devices is necessary to ensure compatibility with Cisco ACI mode. FCoE configurations are not supported in ACI mode, and their presence can hinder the migration process2.

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In a Cisco ACI Multi-Site deployment, proper configuration of the inter-site link is crucial for traffic to pass between different sites. The MTU size is particularly important; if it’s not set correctly, packets may be dropped or fragmented, leading to connectivity issues. By configuring the MTU on the link to be at least 100 bytes larger than that of the ACI fabrics, you allow for encapsulation overhead without packet drops due to exceeding MTU limits. Additionally, configuring the link as a routed subinterface using VLAN-4 is necessary for routing across different broadcast domains, which is essential for inter-site communication in an ACI fabric. References: Implementing Cisco Application Centric Infrastructure Official Cert Guide

 To advertise routes from border leaf switches to compute leaf switches in a shared services scenario, the shared L3Out should be defined in the common tenant. This allows all tenants to access the shared services provided by the L3Out. By configuring the L3Out in the common tenant, routes can be advertised to the compute leaf switches, ensuring that the services are available across the ACI fabric.

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

 The output shows details of tunnel 6 within a Cisco ACI fabric. The transport protocol is listed as “isvlan,” which is typically associated with the GRE protocol in Cisco ACIterminology. GRE, a tunneling protocol developed by Cisco, encapsulates various network layer protocols inside virtual point-to-point links over an IP internetwork. References: Implementing Cisco Application Centric Infrastructure Official Cert Guide

The control plane TEP (Tunnel Endpoint) IP address is a unique IP address assigned to each spine node within a Cisco ACI fabric. This IP address is used to establish MP-BGP EVPN (Multiprotocol Border Gateway Protocol Ethernet VPN) and VPNv4 (VPN version 4) adjacencies with the spine nodes in remote sites when configuring Cisco ACI Multi-Site. The control plane TEP IP enables the spine nodes to exchange routing information and network reachability for seamless integration of multiple sites into a single ACI fabric. References := Implementing Cisco Application Centric Infrastructure Official Cert Guide

 In a Cisco ACI fabric, when configuring a Layer 4 to Layer 7 device for routing traffic through an external firewall connected to the inside of the fabric, the appropriate Function Type in the service graph must be selected to ensure that traffic from both POD-1 and POD-2 passes through the routed firewall when using L3Out. The “GoTo” Function Type is used in scenarios where all traffic destined for L3Out needs to be redirected through a service node like a firewall. This ensures that regardless of the source pod, traffic will traverse the service node before exiting the fabric. References: Implementing Cisco Application Centric Infrastructure Official Cert Guide

The L2 Stretch feature allows for the extension of a Layer 2 network across multiple sites without changing the IP addressing scheme, which satisfies the requirement for starting an application at a DR site without re-IPing servers. Disabling inter-site BUM (Broadcast, Unknown unicast, and Multicast) traffic prevents broadcast storms between sites while still allowing IP mobility, meeting both specified criteria. References := (Implementing Cisco Application Centric Infrastructure Official Cert Guide)

Configuring the Attachable Entity Profile (AEP) on a physical domain is necessary to ensure server ports can migrate to a different leaf switch in the event of a catastrophic failure. This configuration associates server ports with specific leaf switches and allows for seamless migration of connections without relying on Link Aggregation Control Protocol (LACP), which the server NICs do not support. References := ( Implementing Cisco Application Centric Infrastructure Official Cert Guide )

 In a Cisco ACI Multi-Site setup, the ISN (Inter-Site Network) connects different ACI sites. For efficient multicast traffic routing, BIDIR-PIM (Bidirectional Protocol Independent Multicast) is configured throughout the ISN, which is why option B is correct. Increasing the ISN MTU (Maximum Transmission Unit) to support the maximum MTU sent by endpoints is crucial to prevent packet fragmentation or loss, making option C correct.

Options A, D, and E are not typically required for an ACI Multi-Site setup. Direct connectivity between Spine switches and ISN routers, as mentioned in options A and D, is usually established through leaf switches. Option E, enabling IGMPv3 on ISN routers, is more relevant for managing multicast subscriptions within a single site.

References: = Implementing Cisco Application Centric Infrastructure Official Cert Guide