vlan interface administratively down

brad.thurston · ‎05-18-2007

I just created a vlan, assigned it to a port on our 6509, assigned the vlan an ip address and when i shoot the command, show int vlan 31 it says that the vlan is administratively down. I can't figure out whats going on here? i issued a no shut, to no avail.

royalblues · ‎05-18-2007

For the VLAN interface or the SVI to come up, you should have atleast one port connected to that VLAN or you should have a trunk configured in that switch

HTH, rate if it does

Narayan

brad.thurston · ‎05-18-2007

will it not come up if stp does not exist on the vlan

guruprasadr · ‎05-18-2007

HI Brad.Thurston,

Try connecting some device/PC to the VLAN Port & can you please check the same.

Pls Rate if Helps ! !

Best Regards,

Guru Prasad R

brad.thurston · ‎05-18-2007

Thanks guys for your help, I got stp going on the port. after a few seconds for propagation im sure, it came up

royalblues · ‎05-18-2007

Brad,

You mean to say you had disabled STP on the switch?

brad.thurston · ‎05-18-2007

no, but it wasn't showing for that vlan interface

glen.grant · ‎05-18-2007

You need at least one active interface on that vlan , whether it is a user pc or just having the vlan included in a trunk in order for the layer 3 SVI come up , this due to the autostate function of the switch . Make sure the layer 2 vlan is created with the show vlan command.

malikusman301998 · ‎04-16-2024

I had the same problem and after checking the logs i came to know that the IP was getting duplicate and the logs were showing,

"Failed to configure IP address on Vlan123. IP
address overlaps with one of the address configured on Vlan321 in vrf default. Vlan123 has been shutdown. Please change the IP address to avoid overlap and perform a "no shutdown"."

So I deleted the IP from the other interface and issued the no shut command. This solved by problem. So checking the logs in any case can provide help in many cases.