SVI (Switched Virtual Interface)
An SVI is a virtual Layer 3 interface on a switch, often used as a VLAN gateway.
Updated: 2026-03-05
Definition
A switched virtual interface (SVI) provides Layer 3 IP connectivity for a VLAN on a Layer 3 switch.
SVIs enable inter-VLAN routing directly on the switch.
Key points
- VLAN interface with an IP address
- Acts as default gateway for hosts
- Requires L3 switching enabled
Common mistakes
- VLAN down because no active ports in VLAN.
- Forgetting to enable routing on the switch.
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