Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) v1.2InfrastructureMedium
A network administrator is configuring a new Cisco Catalyst 9300 switch to support multiple VLANs. Each VLAN needs to have its own IP address and act as a default gateway for its respective subnet. Which type of interface should the administrator configure on the switch for this purpose?
- ARouted Port
- BSwitched Virtual Interface (SVI)
- CTrunk Port
- DAccess Port
Show answer & explanationAnswer & explanation
Correct answer: B. Switched Virtual Interface (SVI)
A Switched Virtual Interface (SVI) is a logical interface on a multilayer switch that is associated with a VLAN. It allows the switch to perform Layer 3 routing for all ports assigned to that VLAN, acting as the default gateway for devices in that VLAN.
Why the other options are wrong
- A. A routed port is a physical port configured for Layer 3 routing, typically used for point-to-point connections, not for routing multiple VLANs internally.
- C. A trunk port carries traffic for multiple VLANs between switches or a switch and a router, but does not provide IP addressing for VLANs itself.
- D. An access port is a Layer 2 port assigned to a single VLAN, used for connecting end devices.
Switched Virtual Interface (SVI)
A logical interface on a multilayer switch associated with a VLAN, providing Layer 3 routing capabilities for that VLAN and serving as its default gateway.
- Enables inter-VLAN routing on a multilayer switch.
- Must be configured for each VLAN that requires Layer 3 routing.
- Acts as the default gateway for devices in its associated VLAN.
Memory trick: SVI: S for Switch, V for Virtual, I for Interface - the virtual router for VLANs.