Management Vlan only one device SVI Down

[mark.hayes]

Is it possible to change the default state of an SVI with no devices in layer 2 vlan?

"An SVI must have at least one device connected to a Layer 2 interface within the VLAN, otherwise the interface line protocol will be down."

I have configured a management Vlan and a Management IP address for every switch on Vlan 2.

This works fine when there is more than one switch in the VTP domain.

The problem I have now is when I have only one switch in the domain the SVI for that switch goes down. (or 1 stack of switches)

Only when I have seperate switch in the same VTP domain does the SVI go up.

I want the SVI to stay up on the main VTP server (the L3 Switch) regardless of weather there is any other switches in the domain.

I have read in other forums to use

>no keepalive

or

>no switch autostate.

But neither of these commands are available under >interface vlan 2

I am using and have the same issue on 2960X, 3750X, 4507E VSS pairs regardless of code version.

Thanks for your help

[Martin Moran]

Hi @mark.hayes@mytr...,

The "autostate" command is only available in some Cisco routers (running 12.4T atleast), not in Catalyst Switches (Where I personally think it's hardly required).

The SVI remains Up/Up when you have more switches in your VTP domain because the trunk ports between those switches allows all VLANs by default (including VLAN 2). That's why VLAN 2 keeps up in that environment.

Test: If you remove the VLAN 2 from the trunk ports between the switches with the "switch trunk vlan allowed remove vlan 2", the VLAN 2 will go down although you have multiple switches in the VTP enviroment.

Conclusion: It's not possible to keep an SVI Up/Up in a switch without associate it with a port (access or trunk).

Sorry bro.

HTH.

Don't forget to rate.

Rgrds,

Martin, IT Specialist