From owner-freebsd-net@freebsd.org  Sun May 21 23:05:35 2017
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Date: Mon, 22 May 2017 02:05:24 +0300
From: Lev Serebryakov <lev@FreeBSD.org>
Organization: FreeBSD
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Message-ID: <13310414754.20170522020524@serebryakov.spb.ru>
To: freebsd-net@freebsd.org
Subject: How to bring up interface without address?
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Hello Freebsd-net,

  I have "em1" interface which is container for several vlans, but it doesn't
need any special configuration and it doesn't need IPv4 or IPv6 address.

 If I write this in /etc/rc.conf:

ifconifg_em1=""
vlans_em1="isp1 isp2"
create_args_isp1="vlan 10"
create_args_isp2="vlan 20"

ifconfig_isp1="DHCP"
ifconfig_isp2="DHCP"


 Startup script will not bring em1 UP automatically. So, I need some no-op
option for ifconifg_em1 variable. What should I use?

-- 
Best regards,
 Lev                          mailto:lev@FreeBSD.org