350-601 Network Practice Question
Exhibit
interface port-channel1 description VPC Peer-Link switchport mode trunk switchport trunk allowed vlan 1-100 vpc peer-link
Refer to the exhibit. Which VLANs are allowed on the VPC peer-link?
⚠ Common exam trap
Cisco often tests the misconception that the vPC peer-link allows all VLANs or includes the native VLAN, when in fact it defaults to VLANs 1-100 and explicitly excludes the native VLAN to maintain control plane 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
✓
VLANs 1-100 only
In a vPC domain, the peer-link carries only specific VLANs that are allowed on the trunk. By default, the peer-link is configured as a trunk allowing VLANs 1-100, and the native VLAN is not included in this allowed list because the peer-link uses a dedicated VLAN for control traffic (typically VLAN 4094) and does not forward native VLAN traffic. Option C is correct because the default allowed VLAN list on a vPC peer-link is VLANs 1-100, as shown in the exhibit.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
VLANs 1-100 and native VLAN
Why it's wrong here
The native VLAN is not shown and not necessarily included.
- ✗
Only VLAN 1
Why it's wrong here
The range includes VLANs 1 through 100.
- ✓
VLANs 1-100 only
Why this is correct
The allowed VLAN range is 1-100.
- ✗
All VLANs (1-4094)
Why it's wrong here
The allowed list is restricted to 1-100.
Visual reference
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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.