350-601 Network Practice Question
An engineer is configuring a new VLAN on a Nexus switch that is part of a vPC pair. Which step is mandatory to ensure the VLAN is created on both vPC peers?
⚠ Common exam trap
Many candidates assume vPC automatically synchronizes all configurations between peers, but in reality, only specific operational states are synced, while VLAN definitions must be manually created on both switches.
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
✓
Create the VLAN on both peers manually.
In a vPC domain, VLANs are not automatically synchronized between peers. The engineer must manually create the VLAN on both vPC peers to ensure it is present in the local VLAN database on each switch. This is because vPC relies on consistent local configuration on both devices for proper operation, and there is no built-in mechanism to propagate VLAN definitions from one peer to the other.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use vPC peer-gateway to propagate VLANs.
Why it's wrong here
Peer-gateway allows routing, not VLAN sync.
- ✗
Create the VLAN on the secondary peer only; the primary will learn via STP.
Why it's wrong here
Incorrect; STP does not propagate VLAN configuration.
- ✗
Create the VLAN on the primary peer only; it will sync automatically.
Why it's wrong here
VLANs are not automatically synced between vPC peers.
- ✓
Create the VLAN on both peers manually.
Why this is correct
Manual creation on both switches is required unless using config-sync.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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