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Date:      Mon, 14 Dec 2009 11:41:53 -0800
From:      Benjamin Lee <ben@b1c1l1.com>
To:        Chris Cowart <ccowart@timesinks.net>
Cc:        Bruce Cran <bruce@cran.org.uk>, freebsd-net@freebsd.org
Subject:   Re: Running rtadvd or DHCPv6 server via if_bridge interface
Message-ID:  <4B269501.2080706@b1c1l1.com>
In-Reply-To: <20091211065141.GL88840@marvin.timesinks.net>
References:  <20091211052349.0000517a@unknown> <20091211065141.GL88840@marvin.timesinks.net>

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On 12/10/2009 10:51 PM, Chris Cowart wrote:
> Bruce Cran wrote:
>> I have a router configured using if_bridge with a 4-port NIC that's
>> serving addresses over DHCP. I'd like to add in either rtadvd or
>> DHCPv6, but neither work because the bridge interface doesn't have an
>> IPv6 link-local address. Is there a way around this, or is it not
>> possible to serve IPv6 addresses over if_bridge interfaces?
>=20
> It's totally doable; you just have to assigned a link-local address to
> the bridge. There are some reasons why one isn't defined by default,
> which somebody more knowledgeable about the challenges in the
> implementation can highlight.
>=20
> Here's my configuration from rc.conf:
>=20
> ipv6_ifconfig_bridge0=3D"2001:470:8337:10::1/64"
> ipv6_ifconfig_bridge0_alias0=3D"fe80::2%bridge0 prefixlen 64"
>=20
> Once you're doing that, rtadvd will start doing the right thing.

My workaround was to enumerate each bridge member in rc.conf:

rtadvd_interfaces=3D"vlan1 wlan0"


--=20
Benjamin Lee
http://www.b1c1l1.com/


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