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Cisco 2950 VLAN shutting down


i have got cisco 2950T-24, in that vlan 2 has got ip address of /24, it is up & running, now when i create vlan 3 interface & type "no shutdown", vlan 2 interface goes down, why is that so? how to i make both the interface up & running?

VIP Purple

Re: Cisco 2950 VLAN shutting down


since the 2950 switch is a Layer 2 switch only, you cannot have more than one VLAN interface up and active at the same time. So, effectively you cannot create two VLAN interfaces at the same time...



Re: Cisco 2950 VLAN shutting down

Hi Anand

You cant have more than one L3 interface configured in ur 2950 series switches which is again a L2 switch and doesnt hve the support for more than one SVI.

But in case of 3550 or 3750 u can have more L3 interfaces based on the no of vlans supported by them.

But u can enable L2 Vlan in 2950 by enabling the vlan under the vlan database mode..


Re: Cisco 2950 VLAN shutting down

k fine, i clearly understood, thanks a lot


Re: Cisco 2950 VLAN shutting down

As others have said you are not creating a vlan , you are creating a layer 3 SVI . This is used to manage the switch only and thus you only need one address to do this , thus the switch shuts down the other SVI. To create a layer 2 vlan just do a "conf t" enter, type vlan XX where XX is the vlan number you want to create, enter . Verify with the "show vlan" command , should show the vlan you just created and it should show active .