Catalyst 3650 Add VLAN to Trunk

[danmand]

I'm trying to add a newly created VLAN to an existing trunk port.

Logging into the web GUI, I go to CONFIGURATION / PHYSICAL INTERFACES

I then click on port and get a pop up window called Ethernet Interface Settings

Then Port Settings tab

Here's what I see

Switch mode = trunk

Allowed Vlan = Vlan IDs

Vlan IDs = 1,10,22-25,50

When I try to add the new vlan (99) at the end of the 50 I get a message that reads "Default VLANs 1002-1005 can't be modified"

What am I doing wrong?

Thanks

[AdamF1]

Try adding it through the CLI to see if you get the same error. 

switchport mode trunk allow vlan add 99

[balaji.bandi · Accepted solution]

You can follow the below steps and let us know how it goes : (i would suggest to do this steps on command level)

config t

!

vlan 99

name VLAN99

!

interface  interface-number x/x   - make sure change this as per your interface

switchport trunk allowed vlan add 99

!

end

[danmand]

Thank you for the suggestions although I was hoping I wouldn't have to do it with the CLI.

About a year ago, I had help from a Cisco Engineer to setup this switch.  It even took him a few days to work out the issues I was having.

I wrote down the user name and password for it, but I guess It only works with the GUI.  It doesn't seem to work when I try to access the CLI.  Different user and password?

[balaji.bandi]

From the GUI it should work, Since you mentioned GUI you having issue, other alternative i was suggested to fix the issue.

depends on how you setup the device in the intially.

by any chance you can download the config from GUI, so we can look and suggest.

[danmand]

Thank you so much for you help but I was able to log into the CLI.  I was using SSH instead of Telnet.  Oops.  :)