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Date: Sun, 29 Apr 2012 23:33:11 +0200
From: Sascha Holzleiter <mlists+freebsd-net@daemonground.de>
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To: lev@FreeBSD.org
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Cc: freebsd-net@freebsd.org
Subject: Re: Hetzner.de IPv6 and FreeBSD -- default gateway is on other
 prefix, need to add static route before default -- how?
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On 29.04.2012 15:06, Lev Serebryakov wrote:
> Hello, Freebsd-net.
>
>   "Famous" dedicated server provider Hetzner provides native IPv6 for
> servers, but with rather strange routing configuration: you need to
> configure static interface route and make this route default.
>
>   If I add such lines in /etc/rc.conf:
>
> ifconfig_re0_ipv6="inet6 2a01:4f8:131:60a2::2 prefixlen 64 auto_linklocal accept_rtadv"
> ipv6_static_routes="ipv6defgw"
> ipv6_route_ipv6defgw="2a01:4f8:131:60a0:: -prefixlen 59 -iface re0"
> ipv6_defaultrouter="2a01:4f8:131:60a0::1"
> ipv6_default_interface="re0"
>
>    It doesn't work, because default route added first and it fails to
> be added, as route to 2a01:4f8:131:60a0::1 is not known yet.
>
>    If I replace this line in /etc/rc.d/routing:
>
> ipv6_static_routes="default ${ipv6_static_routes}"
>
>    with
>
> ipv6_static_routes="${ipv6_static_routes} default"
>
>    Everything works, but it is ugly hack -- to change system startup
> script, and I don't like it (for FreeBSD 8 I needed to change
> /etc/network.subr in similar way).
>
>    Is here any good way to configure such routing without changes in
> scripts, only with /etc/rc.conf?

Hi Lev,

just use another static route instead of the ipv6_defaultroute entry:

ipv6_static_routes="ipv6defgw ipv6defgwroute"
ipv6_route_ipv6defgw="2a01:4f8:131:60a0:: -prefixlen 59 -iface re0"
ipv6_route_ipv6defgwroute="default 2a01:4f8:131:60a0::1"

It's not pretty but works without having to modify the rc scripts.


Greetings,
   Sascha