Switch virtual interface
A switch virtual interface is a virtual Layer 3 interface on a switch that provides an IP interface for a VLAN, management, or routing.
Acing the CCNA Exam: Volume 1 Fundamentals and Protocols
A switch virtual interface is a virtual Layer 3 interface on a multilayer switch associated with a VLAN and configured with an IP address.
- How it is used
- Performs inter-VLAN routing on a multilayer switch by providing each VLAN with a Layer 3 gateway interface.
- How deep it goes
- Defines SVIs, explains packet forwarding, gives configuration commands, and verifies routes and status; it stops short of deeper implementation internals.
- Examples
- Uses VLANs 10, 20, and 30 with assigned IP addresses, packet forwarding from PC1 to PC5, and Cisco show-command verification.
- What you can do after
- Operate/configure SVIs, enable multilayer switching, assign gateway addresses, and verify connected routes and interface status.
Acing the CCNA Exam: Volume 2 Advanced Networking and Security
A switch virtual interface, or SVI, is a virtual Layer 3 interface on a switch that provides an IP interface for a VLAN, management, or routing.
- How it is used
- Provides IP management access, VLAN default gateways, and routed interfaces on multilayer switches.
- How deep it goes
- Defines behavior, configuration, verification, and the Layer 2 routing limitation without extending beyond Cisco IOS operations.
- Examples
- Uses VLAN 1 management configuration and management, internal, and guest SVIs on a wireless LAN switch.
- What you can do after
- Operate/configure SVIs, assign addresses, set a Layer 2 default gateway, enable routing, and verify interface status.
Related concepts
- layer 3 switchused by · A Layer 3 switch is a network switch that performs both data-link-layer switching and network-layer packet routing.
- inter-vlan routingimplements · Inter-VLAN routing is the forwarding of traffic between subnets associated with different VLANs in a segmented local network.
- network switchused by · A network switch is a device that connects devices within a local network and selectively forwards data-link-layer frames to their intended destinations.
- Hot Standby Router Protocolused by · Hot Standby Router Protocol is Cisco’s first-hop redundancy protocol, which provides a resilient virtual default gateway through coordinated routers.
- vlanconfigures · A VLAN is a logically isolated Layer 2 network segment implemented within shared physical network infrastructure, typically forming a separate broadcast domain.
- dynamic interfaceequivalent to · A dynamic interface is a logical wireless LAN controller interface associated with a WLAN and VLAN and configured with network parameters and a DHCP forwarding destination.
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