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From: Milan Obuch <freebsd-net@dino.sk>
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Subject: Re: How to change vlan id without destroy and recreate a new vlan
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On Wed, 18 Jan 2012 17:36:04 +0800
"Chen, Kang (NSN - CN/Hangzhou)" <kang.chen@nsn.com> wrote:

> Hello,
> 
> As you know, if I want to create a new vlan interface face, I can use
> the following command:
> ifconfig vlan0 vlan 101 vlandev fxp0
> My question is, if I want to change the vlan id 101 to 202, if there
> anyway to do this without destroy it and recreate?
> 

Hi,

I did it sometimes with following command sequence:

ifconfig vlan0 -vlandev fxp0
ifconfig vlan0 vlan 202 vlandev fxp0

(writing off top of my head, but generally that's just it)

Regards,
Milan