350-601 Network Practice Question
An engineer is designing a Cisco ACI multi-site solution. Which two considerations are critical for inter-site connectivity? (Choose two.)
⚠ Common exam trap
Cisco often tests the misconception that a single APIC cluster can manage multiple sites, but in reality, each site requires its own APIC cluster for independent operation and fault isolation.
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
✓
Deploy a L3Out at each site for external connectivity.
In Cisco ACI Multi-Site, each site operates with its own APIC cluster and independent fabric. A L3Out at each site is critical because it provides external connectivity for that site's endpoints, allowing traffic to exit locally rather than being hair-pinned across the inter-site network. This design optimizes traffic flow and aligns with the Multi-Site architecture where sites are managed separately but interconnected via the Inter-Site Network (ISN).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure a stretch VLAN across sites.
Why it's wrong here
ACI multi-site uses stretched EPGs, not VLANs.
- ✗
Use a separate OSPF process per site.
Why it's wrong here
Not a requirement for inter-site connectivity.
- ✓
Deploy a L3Out at each site for external connectivity.
Why this is correct
Each site typically has its own L3Out.
- ✗
Use a single APIC cluster for both sites.
Why it's wrong here
Each site has its own APIC cluster; multi-site controller is separate.
- ✓
Ensure IP connectivity between the sites for the underlay.
Why this is correct
Inter-site links require IP reachability.
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