CCNAintermediate55 minfree
Router-on-a-Stick Inter-VLAN Routing
Route between VLANs with a single router interface and explicit 802.1Q subinterfaces.
Lab challenge
Make isolated VLANs talk through the router without breaking the access layer design.
Progression
Confirm the trunk first, build subinterfaces, assign gateways, then test inter-VLAN traffic flow.
Catalog metadata
- Bundle
- CCNA 200-301 v1.1 Foundation Lab Catalog
- Blueprint domain
- Network Access
- Blueprint objective
- Configure inter-VLAN routing using router subinterfaces
- Focus
- inter-vlan • router-on-a-stick • subinterfaces
- Platform
- Packet Tracer-friendly • CML-friendly • platform-neutral
- Device count
- 5
- Reference source
- Cisco CCNA 200-301 v1.1 blueprint → Configure inter-VLAN routing using router subinterfaces
Prerequisites
- • VLANs
- • trunks
- • default gateway basics
Skills practiced
- • create subinterfaces
- • assign gateway IPs
- • tag VLAN traffic
- • verify inter-VLAN forwarding
Validation checklist
- • subinterfaces are up
- • hosts use the correct default gateway
- • cross-VLAN pings succeed via the router
Task sequence
- 1Configure the switch trunk to the router.
- 2Create one subinterface per VLAN.
- 3Assign gateway addresses and encapsulation values.
- 4Set host default gateways.
- 5Verify cross-VLAN communication.
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