350-601 Security Practice Question
A Cisco ACI fabric has contracts configured to allow traffic between two EPGs. After deployment, traffic between endpoints in these EPGs is being dropped, but contract statistics show no packets have been permitted. The administrator checks the contract configuration and it looks correct. What is the most likely cause?
⚠ Common exam trap
Cisco often tests the misconception that configuring a contract on the provider EPG alone is enough to permit traffic, when in fact the consumer EPG must also explicitly consume the contract for the policy to take effect.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The contract is configured only on the provider EPG, but the consumer EPG is not consuming the contract.
The most likely cause is that the contract is configured on the provider EPG but the consumer EPG is not configured to consume it. In Cisco ACI, a contract must be explicitly provided by one EPG and consumed by another for traffic to be permitted. If the consumer EPG does not have the contract applied, the contract will not be enforced, and traffic will be dropped even if the contract configuration appears correct. The contract statistics showing no permitted packets confirm that the contract is not being applied to the traffic flow.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The contract is configured only on the provider EPG, but the consumer EPG is not consuming the contract.
Why this is correct
The consumer EPG must also consume the contract; otherwise, traffic is denied.
- ✗
The contract is applied to the wrong VRF.
Why it's wrong here
Contracts are within a VRF, but the VRF is not the issue here.
- ✗
The filter direction is set to both, but the contract is using an incorrect filter.
Why it's wrong here
Filter direction likely not the cause if contract stats show no permits.
- ✗
The endpoints are in different VMM domains.
Why it's wrong here
VMM domains are not required for contract enforcement.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-601 exam.