Shutting down default VLAN1, Possible?

Hi
I have been told that VLAN 1 carries CDP and VTP info, is this correct? Is it possible to change the VLAN witch these protocols use? What is the effect of shutting down VLAN1? Can this be done?
Thanks in advance.

Ankur,
you are not 100% correct, I'm afraid.
What you are talking about is changing the management VLAN (i.e. virtual mangement interface with IP address assigned).
But it has nothing to do with CDP and VTP protocols running.
It should be possible to disable VLAN1 on trunks (CDP, VTP and other Cisco control plane protocols would stay running, disabling VLAN1 means only disabling user data and STP), see VLAN1 part of http://www.cisco.com/warp/customer/473/103.html#cat_control , e.g.
But on low-end switches (like 2900XLs), disabling VLAN1 on trunks doesn't work.
I've presonally noticed that
sw(config-if)#switchport trunk allowed vlan remove 1
command is allowed, gives no error message, but doesn't remove VLAN1 from trunk.
Regards,
Milan

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