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  • SVI configuration (Cisco)

    Design & Configure

    SVI configuration (Cisco)

    Technology: Network
    Area: Networking General
    Vendor: Cisco
    Software: 12.X , 15.X
    Platform: Catalyst 9200, Catalyst switches, Nexus Switches

    A Switched Virtual Interface (SVI) is a routed interface in IOS representing the IP addressing space for a particular VLAN connected to this interface. There is no physical interface for the VLAN and the SVI provides the Layer 3 processing for packets from all switch ports associated with the VLAN.

    With SVIs the switch will use a virtual Layer 3 interface to route traffic to other Layer 3 interfaces thus eliminating the need for a physical router. VLANs reduce the load on a network by dividing a LAN into smaller segments and keeping local traffic within a VLAN. However, because each VLAN has its own domain, a mechanism is needed for VLANs to pass data to other VLANs without passing the data through a router.


    To configure the SVI, ensure your switch has a VLAN represented by the SVI you want to create:

    Switch#vlan database
    Switch(vlan)#vlan 2

    Configuring the VLAN interfaces with the IP address:

    Switch#configure terminal
    Enter configuration commands, one per line.  End with CNTL/Z.
    Switch(config)#interface Vlan2
    Switch(config-if)#ip address
    Switch(config-if)#no shutdown



    Author: Marcin Bialy

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