
There are three requirements for an [SVI](/vlans-svi) to be in a state of up/up:

-   The [VLAN](/vlan) must exist and be active in the VLAN database.
-   At least one interface should be active for the VLAN.
-   That interface has to be in [Spanning Tree Protocol (STP)](/spanning-tree-protocol-stp) forwarding state.

The **switchport autostate exclude** command on the interface can be used to exclude interfaces from this check. The **no autostate exclude** command on the VLAN can be used to disable all checks completely. 

The result is that an SVI would have the up/up state even if the requirements above are not met.

Links:

https://forum.networklessons.com/t/intervlan-routing/1147/26?u=lagapides

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/15-2_2_e/command/reference/CR_3750X/cli3.html#pgfId-3120403

Switching - switchport autostate command

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