FreeBSD ipv6 rc.conf settings issue

Matthew Seaman m.seaman at
Thu Jan 7 15:48:08 UTC 2010

Steve Bertrand wrote:
> Bogdan Webb wrote:
>> I'm having problems with the /etc/rc.conf setup of a ipv6 tunnel on my
>> FreeBSD 7.2-RELEASE-p6
>> It`s a particular issue on the ipv6_defaultrouter config, it jost does not
>> work...
>> Upon network and routing restart ipv6 is enabled the gif interface are given
>> ip's and everything but the defaultrouter does not.
>> Researching a bit i found some say that gif1 sould work and tried both
>> ipv6_defaultrouter="-interface gif1"
>> and
>> ipv6_defaultrouter="2001:0470:1f0a:d40::1"
> This issue is not limited to gif interfaces...
> I've had this exact same problem on ALL of my FreeBSD hosts for, well,
> since ever.
> No matter what I've tried, if a box reboots, I must manually enter in
> the default IPv6 router.
> Even on IPv6-only hosts, the default gateway does not take upon reboot.
> I'm up for figuring this issue out today, if nobody else has a solution
> for you.
> Let me know. If you're interested, I'll fire up a couple of hosts that
> we can use and just continuously reboot if necessary :)

Funny.  My IPv6 config works like a charm, on both 7.2-STABLE and
8.0-STABLE.  Related config settings look like this:



ipv6_defaultrouter="-interface gif0"


This causes my machine to autoconfigure an IPv6 address on the ethernet
i/f, plus provide rtadvd service to anything else wanting IPv6 connectivity
on my home LAN.  IPv6 traffic from the home LAN is routed via the tunnel to
the IPv6 tunnel handler provided by my ISP, but the only reason I need to do
that is because IPv6 aware consumer broadband routers are kind of hard to



Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
                                                  Flat 3
PGP:     Ramsgate
                                                  Kent, CT11 9PW

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