Switch Virtual Interfaces; Svi Autostate Exclude - Cisco Catalyst 2960-XR Configuration Manual

Interface Types
Entering a no switchport interface configuration command shuts down the interface and then re-enables
Note
it, which might generate messages on the device to which the interface is connected. When you put an
interface that is in Layer 2 mode into Layer 3 mode, the previous configuration information related to the
affected interface might be lost.
The number of routed ports that you can configure is not limited by software. However, the interrelationship
between this number and the number of other features being configured might impact CPU performance
because of hardware limitations.
The IP base feature set supports static routing and the Routing Information Protocol (RIP). For full Layer 3
Note
routing or for fallback bridging, you must enable the IP services feature set on the standalone switch, or
the active switch.

Switch Virtual Interfaces

A switch virtual interface (SVI) represents a VLAN of switch ports as one interface to the routing or bridging
function in the system. You can associate only one SVI with a VLAN. You configure an SVI for a VLAN
only to route between VLANs or to provide IP host connectivity to the switch. By default, an SVI is created
for the default VLAN (VLAN 1) to permit remote switch administration. Additional SVIs must be explicitly
configured.
You cannot delete interface VLAN 1.
Note
SVIs provide IP host connectivity only to the system.
Although the switch stack or switch supports a total of 1005 VLANs and SVIs, the interrelationship between
the number of SVIs and routed ports and the number of other features being configured might impact CPU
performance because of hardware limitations.
SVIs are created the first time that you enter the vlan interface configuration command for a VLAN interface.
The VLAN corresponds to the VLAN tag associated with data frames on an ISL or IEEE 802.1Q encapsulated
trunk or the VLAN ID configured for an access port. Configure a VLAN interface for each VLAN for which
you want to route traffic, and assign it an IP address.
When you create an SVI, it does not become active until it is associated with a physical port.
Note

SVI Autostate Exclude

The line state of an SVI with multiple ports on a VLAN is in the up state when it meets these conditions:
• The VLAN exists and is active in the VLAN database on the switch
• The VLAN interface exists and is not administratively down.
Catalyst 2960-XR Switch Interface and Hardware Component Configuration Guide, Cisco IOS Release 15.0(2)EX1
16
Configuring Interface Characteristics
OL-29420-01