802.1Q Trunking, Native VLAN, and Allowed VLAN Lists
Carry multiple VLANs across a switch-to-switch link while controlling what is allowed to traverse.
Lab challenge
Build a trunk that is functional, clean, and not lazily carrying every VLAN in sight.
Progression
Stand up the trunk, align native VLAN settings, restrict the allowed list, and verify host connectivity across switches.
Catalog metadata
- Bundle
- CCNA 200-301 v1.1 Foundation Lab Catalog
- Blueprint domain
- Network Access
- Blueprint objective
- Configure and verify trunk ports between switches
- Focus
- switching • trunking • vlans
- Platform
- Packet Tracer-friendly • CML-friendly • platform-neutral
- Device count
- 4
- Reference source
- Cisco CCNA 200-301 v1.1 blueprint → Configure and verify trunk ports between switches
Prerequisites
- • VLAN basics
- • access port behavior
Skills practiced
- • configure 802.1Q trunks
- • set native VLAN
- • prune allowed VLANs
- • verify encapsulation and forwarding
Validation checklist
- • trunk state is operational
- • native VLAN matches on both ends
- • allowed VLAN list permits only intended segments
Task sequence
- 1Configure a trunk on the inter-switch link.
- 2Set and verify the native VLAN.
- 3Restrict the allowed VLAN list.
- 4Verify trunk state with show commands.
- 5Test host communication for allowed VLANs only.
Free catalog + advanced practice
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Grab the learner pack for this lab with the workbook, task sequence, validation checklist, reflection template, metadata, and reusable planning assets.