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Date: Thu, 18 Jun 2009 17:16:18 +0300
From: Nikos Vassiliadis <nvass9573@gmx.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Configuring VLANs - Why is IP address require on NIC connected
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Geoff Roberts wrote:
> I find I have to give the ext0 interface an IP address in order for routing 
> and packet filtering to work on the attached VLANs.
> 
> a) Is there a way to configure this so that I don't have to give ext0 an IP 
> address?

Yes, you just have to "up" the interface:
ifconfig_em0="up"