Implementing Cisco Application Centric Infrastructure (DCACI) — Question 6

A data center administrator is upgrading an ACI fabric. There are 3 APIC controllers in the fabric and all the servers are dual-homed to pairs of leaf switches configured in VPC mode. How should the fabric be upgraded to minimize possible traffic impact during the upgrade?

Answer options

• A. 1. Create two maintenance groups for the APIC controllers: VPC left and VPC right. 2. Upgrade the first group of controllers. 3. Upgrade the second group of controllers. 4. Upgrade the leaf switches.
• B. 1. Create two maintenance groups for APIC controllers: VPC left and VPC right. 2. Upgrade the leaf switches. 3. Upgrade the first group of controllers. 4. Upgrade the second group of controllers.
• C. 1. Create two maintenance groups for the leaf switches: VPC left and VPC right. 2. Upgrade the APIC controllers. 3. Upgrade the first group of leaf switches. 4. Upgrade the second group of leaf switches.
• D. 1. Create two maintenance groups for the leaf switches: VPC left and VPC right. 2. Upgrade the first group of switches. 3. Upgrade the second group of switches. 4. Upgrade the APIC controllers.

Correct answer: C

Explanation

The correct answer is C because it prioritizes the upgrade of the APIC controllers before the leaf switches, ensuring that the control plane is updated and stable before making changes to the data plane. Other options either upgrade the leaf switches first or do not properly separate the maintenance groups for APIC controllers and leaf switches, potentially causing traffic disruption during the upgrade process.