True Statements About APIC Controllers in ACI Fabric Configuration

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ACI (Application Centric Infrastructure) is a data center networking solution developed by Cisco. APIC (Application Policy Infrastructure Controller) is the central management and configuration point for the ACI fabric. It is responsible for providing a single point of control and visibility for the entire network infrastructure.

The configuration of APIC controllers in the ACI fabric is a critical aspect of the ACI deployment. Let's go through each answer option to understand which two statements are true.

A. Commissioning an APIC can be done via the APIC UI, but decommissioning an APIC must be done using the CLI.

This statement is not entirely correct. Both commissioning and decommissioning of an APIC can be done using either the APIC UI or the CLI. The APIC UI provides a graphical user interface for configuration, while the CLI provides a command-line interface for configuration.

B. Cluster controllers added to the APIC must be running the same version of firmware.

This statement is true. All the cluster controllers in an APIC cluster must be running the same version of firmware. This ensures that the controllers have the same features, functionality, and bug fixes.

C. An APIC cluster is comprised of multiple controllers that provide monitoring, diagnostic, and configuration capability.

This statement is true. An APIC cluster is a group of multiple controllers that work together to provide policy-based automation, configuration, and management of the ACI fabric. The controllers provide real-time monitoring, diagnostics, and centralized management of network policies.

D. When performing planned changes to the cluster, at least one controller in the cluster must be healthy.

This statement is true. When performing planned changes to the APIC cluster, such as firmware upgrades or reboots, at least one controller in the cluster must be healthy. This ensures that the cluster remains operational and that the network policies are not disrupted.

E. APIC cluster size is set during the initial setup script, and after it is configured it requires a nondisruptive re-initialization of the APIC cluster to change.

This statement is true. The size of the APIC cluster is set during the initial setup script, and it cannot be changed without a nondisruptive re-initialization of the APIC cluster. This involves adding or removing controllers from the cluster, which requires careful planning and execution to ensure minimal disruption to the network policies.

In conclusion, the two statements that are true about the configuration of APIC controllers in the ACI Fabric are:

• Cluster controllers added to the APIC must be running the same version of firmware.
• When performing planned changes to the cluster, at least one controller in the cluster must be healthy.