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Date:      Mon, 24 Dec 2012 06:07:03 +0200
From:      Kimmo Paasiala <kpaasial@gmail.com>
To:        =?UTF-8?Q?=C5=81ukasz_W=C4=85sikowski?= <lukasz@wasikowski.net>
Cc:        Ben Morrow <ben@morrow.me.uk>, FreeBSD current <freebsd-current@freebsd.org>, freebsd-stable@freebsd.org
Subject:   Re: ipv6_addrs_IF aliases in rc.conf(5)
Message-ID:  <CA%2B7WWSdUFc1Xp-KikDjk2yRHP7S41Uxy3SdOrKZyP%2BcR7mp0KA@mail.gmail.com>
In-Reply-To: <50D5F296.9050109@wasikowski.net>
References:  <50D1C553.9060100@wasikowski.net> <CA%2B7WWSewg%2BQqcn1L508tAiBY1zLQfne6AC6w7oAco3y=efcX9w@mail.gmail.com> <CA%2B7WWSeibFGNSwtjUeK-U6irj6axGftAHJC2eYU3tQoeM0JRpA@mail.gmail.com> <20121220132750.GB99616@stack.nl> <CA%2B7WWSdqjkZq1y0dyxV9LiycNA0V%2BCyEKt9x0d%2BWJaaWC4SXSg@mail.gmail.com> <CA%2B7WWSc-VwdmYBEtZwO03x-p2o7-eUr9bWrhMhjBCUSah_0v_A@mail.gmail.com> <50D4F2E4.7020600@wasikowski.net> <CA%2B7WWSc9sR74RT=oMT8uSBmNYrK-80t7Y8KKZx9JxuVE4drXBA@mail.gmail.com> <CA%2B7WWSdM=45i5knYHUa_Nq=2dta4ek8Q%2Bp3g_Bf697d7_i__QA@mail.gmail.com> <CA%2B7WWSc9ORJQnvaVA0QVnwf4i=wEJ-%2BcYiOqQK3wDUDzL=TGTA@mail.gmail.com> <20121222171400.GA2399@anubis.morrow.me.uk> <50D5F296.9050109@wasikowski.net>

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On Sat, Dec 22, 2012 at 7:49 PM, =C5=81ukasz W=C4=85sikowski
<lukasz@wasikowski.net> wrote:
> W dniu 2012-12-22 18:14, Ben Morrow pisze:
>> Quoth =3D?UTF-8?B?xYF1a2FzeiBXxIVzaWtvd3NraQ=3D=3D?=3D <lukasz@wasikowsk=
i.net>:
>>> W dniu 2012-12-22 04:41, Kimmo Paasiala pisze:
>>>
>>>> Yeah, this is problem in network.subr. An interface is not recognized
>>>> as IPv6 capable if the interface is not in "ipv6_network_interfaces"
>>>> and there's no "ifconfig_IF_ipv6" in rc.conf(5), bummer. For IPv4 it
>>>> "just works" because the interface is always assumed to be IPv4
>>>> capable.
>>>
>>> Ok, I used ifconfig_em0_ipv6=3D"up" and it worked. So it looks like thi=
s:
>>
>> The documented way to do this is to just set the link-local address in
>> ifconfig_IF_ipv6, since an interface is required to have a link-local
>> address. Either configure an fe80:: address explicitly or set
>>
>>     ifconfig_em0_ipv6=3D"inet6 auto_linklocal"
>>
>> Alternatively, if you set ipv6_activate_all_interfaces all interfaces
>> will be considered IPv6-capable.
>
> link-local address is assigned by default, even with ifconfig_IF_ipv6=3D"=
up".
>
> root@freebsd:~ # grep -Ev '^[[:space:]]*#|^$' /etc/rc.conf ; ifconfig
> em0 | grep -E '^[[:space:]]*inet6' | head -2
> hostname=3D"freebsd"
> ifconfig_em0=3D"up"
> ipv4_addrs_em0=3D"192.168.168.20-24/24"
> defaultrouter=3D"192.168.168.1"
> ipv6_network_interfaces=3D"em0"
> ipv6_defaultrouter=3D"2001:6a0:1cb::ffff"
> ifconfig_em0_ipv6=3D"up"
> ipv6_addrs_em0=3D"2001:6a0:1cb::1-e/128"
> sshd_enable=3D"YES"
> dumpdev=3D"NO"
> named_enable=3D"YES"
>         inet6 fe80::a00:27ff:fe02:8371%em0 prefixlen 64 scopeid 0x1
>         inet6 2001:6a0:1cb::1 prefixlen 128
>
> Of course using "inet6 auto_linklocal" instead of "up" seems a better
> way to do it, thank you for this tip.
>
> --
> best regards,
> Lukasz Wasikowski


I have put up the patch at github as:

https://gist.github.com/4362018

This version should work with just the ipv6_addrs_IF in rc.conf(5). I
changed the detection of ipv6 interfaces so that just having the
ipv6_addrs_IF line is enough.

-Kimmo



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