04-04-2007 07:45 PM - edited 03-05-2019 03:18 PM
hello there...i need your help.. i heard that we should change native vlan number.. why? and what the consequences to change that native vlan1. ex:cdp,vtp,etc... tx anyway :)
04-09-2007 07:56 AM
the native vlan is vlan 1 by default.
But if you are configuring the trunk interface, you could change this problem by the command.
switch(config-if)#switchport trunk native vlan [vlan-id]
the untagged data traffic will be forwarding to the new native vlan.
04-09-2007 09:39 AM
Hi
Attached is a link to a vlan security doc from cisco which explains the use of the native vlan and why it should be changed from vlan 1 which is the default.
We use a non-routable vlan as our native vlan on all our switches. This vlan also never has any switch ports in it.
Vlan 1 will still be used to send cdp, vtp pagp between switches.
HTH
Jon
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