Replacing VMs in Cisco ACI VPC Interface Policy Group
A VM called App_1 belongs to VLAN 10. VM App_2 belongs to VLAN 20. Pool_1 contains VLAN 10 and Pool_2 contains VLAN 20. Currently, AP_1 is located on Server 1. The Cisco ACI fabric has these configurations: • The two physical domains are called Phys_1 and Phys_2. • The two VLAN pools are called Pool_1 and Pool_2. • The two AAEPs are called AAEP_1 and AAEP_2. An engineer must replace App_1 with App_2. Which action under the VPC interface policy group accomplishes this goal?
Community Votes
100% of anonymous learners picked answer C. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
The exam tests the hierarchy of ACI policies, specifically that an AAEP must be attached to an interface policy group to inherit its associated VLAN pools and domains, rather than mapping entities directly.
This question addresses how to migrate a virtual machine between VLANs in a Cisco ACI fabric by modifying the VPC interface policy group. It establishes that attaching the correct Attachable Access Entity Profile (AAEP) is the necessary action to apply the new VLAN pool and physical domain.
Learners often select 'Map VM' or 'Assign Pool', mistakenly believing they can directly assign a VLAN pool or VM to an interface policy group without the intermediate AAEP step.
Community Discussion (3 comments)
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Expert Analysis
Why the Answer Is Correct
In Cisco ACI, the Attachable Access Entity Profile (AAEP) acts as the bridge between infrastructure policies and endpoint connectivity. To replace App_1 with App_2, which resides in a different VLAN (20 vs 10), the engineer must attach AAEP_2 to the VPC interface policy group. AAEP_2 is configured to use Pool_2 and Phys_2, thereby correctly configuring the interface for the new VLAN environment.Why the Other Options Are Wrong
Options A, B, and D are incorrect because you cannot directly map a VM or assign a VLAN Pool to an interface policy group. Physical domains (Option A) are referenced by the AAEP, not attached directly to the interface. Mapping a VM (Option B) is typically done via EPG associations or direct port binding in specific contexts, not through the interface policy group itself. Assigning a pool (Option D) is also invalid syntax for this policy level; the pool is linked via the AAEP.Community Comment Notes
Community consensus strongly supports Option C. Users noted that while one might think to assign the pool directly, the architecture requires attaching the AAEP first. Comments highlight that 'Attach the AAEP_2 to vPC' is the standard procedure to ensure the correct VLAN pool and physical domain are applied to the interface.Exam Strategy
When dealing with ACI interface policies, always check if an AAEP is required to link the VLAN pool and physical domain. Remember that interfaces get their connectivity properties from the AAEP attached to them, not from direct pool assignments.
Frequently Asked Questions
Can I assign a VLAN pool directly to a VPC interface?
No, VLAN pools are not assigned directly to interface policy groups. They must be associated with an AAEP, which is then attached to the interface.
What is the role of AAEP in ACI interface configuration?
The AAEP maps the interface to a specific VLAN pool and physical domain, enabling the correct network connectivity for endpoints.