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New Member

Bringing Vlan interfaces up up

I've set up a 3550 switch with a trunk connection to another 3550 switch to transfer all vlans accross. On the new switch i'm trying to configure a vlan interface (let's say vlan 2) with an IP address which is unique from the original switches vlan 2 interface. I type in no shut and when I look at the interface status is says shut. I know it's probably something that I'm overlooking, but, I can't seem to get these vlan interfaces to come up. Can someone please help me on this?

Thanks in advance.


New Member

Re: Bringing Vlan interfaces up up

Make sure to enable IP routing. Otherwise you can only have one active vlan interface.

Hope this helps.



Hall of Fame Super Silver

Re: Bringing Vlan interfaces up up


On most switches there must be at least one active port in the VLAN for the VLAN interface to be up/up. Is there an active port in this VLAN on the new switch?



New Member

Re: Bringing Vlan interfaces up up

thanks for your input. I've finally figured out that the switch model that I've been working on (3548) is not a layer 3 switch. I probably should have mentioned the model number.


Re: Bringing Vlan interfaces up up

You can only have 1 SVI up at a time on a 3548 , so you apparently already have a SVI that is up/up , if so then do a shutdown on the existing SVI and bring up the new SVI . This interface is to manage the switch only and has nothing to do with any kind of routing between vlans . Also make sure the layer 2 vlan was created in the vlan database , do a show vlan and make sure vlan 2 shows active .

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