From owner-freebsd-stable@FreeBSD.ORG  Fri Jun  1 09:29:41 2012
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Date: Fri, 01 Jun 2012 11:29:41 +0200
From: Thomas Krause <freebsd-stable@chef-ingenieur.de>
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Subject: Config ipv4 and ipv6 aliases
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Hi,

(I'm using FreeBSD 9.0-REL).

ifconfig_em0_ipv6_alias0 doesn't work. I've to use
ifconfig_em0_alias0 for both ipv4 and ipv6.
This is not consequent. My working config
looks like this:

ifconfig_em0="inet 192.168.100.50/28"
ifconfig_em0_ipv6="inet6 2a00:abcd:0:405::2/64"

ifconfig_em0_alias0="inet 192.168.100.51/32"
ifconfig_em0_alias1="inet6 2a00:abcd:0:405::3/64"

defaultrouter="192.168.100.49"
ipv6_defaultrouter="2a00:abcd:0:405::1"

Please correct me, if there is a better solution.

Regards,
Thomas.