Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) v1.2InfrastructureEasy
A network engineer is configuring a new Cisco Catalyst 9300 switch. The switch needs to support multiple VLANs and provide inter-VLAN routing for these VLANs. Which of the following interface types must be configured to achieve inter-VLAN routing on the switch itself?
- ASwitched Virtual Interface (SVI)
- BLoopback interface
- CPort-channel interface
- DPhysical interface
Show answer & explanationAnswer & explanation
Correct answer: A. Switched Virtual Interface (SVI)
To enable inter-VLAN routing directly on a Layer 3 switch, a Switched Virtual Interface (SVI) must be configured for each VLAN that requires routing. SVIs act as the default gateway for devices within their respective VLANs.
Why the other options are wrong
- B. Loopback interfaces are logical interfaces primarily used for management and routing protocol stability, not for inter-VLAN routing.
- C. Port-channel interfaces aggregate multiple physical links for bandwidth and redundancy, not for inter-VLAN routing.
- D. Physical interfaces are for connecting devices, not for inter-VLAN routing on the switch itself.
Switched Virtual Interface (SVI)
A logical Layer 3 interface on a switch associated with a VLAN, allowing the switch to perform inter-VLAN routing and act as a default gateway for that VLAN.
- Enables Layer 3 routing capabilities on a Layer 2 switch.
- Configured with an IP address and subnet mask.
- Acts as the default gateway for devices in its associated VLAN.
Memory trick: SVIs Route Virtual Lanes