It is not that you are removing  VLAN1 from the Trunk, or deleting it, but rather not including it in the Trunk. If you do something similar to this. console(config-if)# switchport mode trunk console(config-if)# switchport trunk native vlan 3 console(config-if)# switchport trunk allowed vlan add 2 Then when you do #show vlan, it should display that VLAN1 has no ports in it.
Hi, I would like disable vlan 1. I read in cli manual about  command default-vlan disable. But in my 5324 is not that option. I updated to the newest firmware but still do not have that command. Does this device recognize this command? sw3g.sh(config-vlan)#  do                   execute an EXEC-level command  end                  Exit from configure mode  exit                 Exit from current context  map                  Map protocol to group ID  no                   Negate command  vlan                 Create a new VLANsw3g.sh(config-vlan)# do show verSW version    2.0.1.4 ( date  01-Aug-2010 time  17:00:12 )Boot version    1.0.2.02 ( date  23-Jul-2006 time  16:45:47 )HW version    00.00.02sw3g.sh(config-vlan)#Thank you in advance 
5324 disable vlan 1