Vlan not going up

[Ed Lo]

Hi,

I should say I've had this problem before and it was resolved using interface Wlan-GigabitEthernet0/0 switchport mode trunk. This is on another router and it's not working this time. I've attached the config files as both would be too long. I followed the same steps as last time but the vlans won't go up with this command.

thanks

[Georg Pauwen]

Hello,

have you created the VLANs locally ? What is the output of 'show vlan-switch' ?

[Ed Lo]

I'm only using a 1941w router and it's not connected to any network switch.

[Georg Pauwen]

What I mean is: have you created the VLANs like this:

1941#conf t

1941(config)#vlan 2

1941(config)#vlan 4

[Ed Lo]

I did it by doing:

1941# conf t

1941# interface vlan 2

Doesn't this create them as well, or is this the mistake I made in making the vlan?

[Georg Pauwen · Accepted solution]

That is not sufficient. You also need to create the VLANs (as I posted before) in the local switch database.

1941#conf t

1941(config)#vlan 2

1941(config)#vlan 4

[paul driver]

Hello

You need to make sure the trunk is up and that vlan is allowed to traverse the trunk

sh int trunk

or

That you have a active port in the vlan that isnt coming up.

Sh vlan brief

res
Paul