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Date:      Sat, 30 Dec 2006 16:42:21 -0600 (CST)
From:      "Sean C. Farley" <sean-freebsd@farley.org>
To:        Dimitry Andric <dimitry@andric.com>
Cc:        Joe Marcus Clarke <marcus@freebsd.org>, freebsd-stable@freebsd.org
Subject:   Re: gif problems in -STABLE
Message-ID:  <20061230163738.D1066@thor.farley.org>
In-Reply-To: <4595C753.5030502@andric.com>
References:  <4595C753.5030502@andric.com>

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On Sat, 30 Dec 2006, Dimitry Andric wrote:

> Hi,
>
> I just updated one of my machines from RELENG_6 as of 2006-11-03, to
> RELENG_6 as of 2006-12-29.  This caused the IPv6 tunnel which this box
> uses, which had been doing fine for months, to suddenly stop working.
>
> Reverting to my 2006-11-03 kernel restored the tunnel again, so my ISP
> could be ruled out. :)
>
> The symptoms are that the IPv6 default gateway cannot be reached, and
> you'll get "ping6: sendmsg: No route to host" when you try to ping it.
>
> For some reason, the ifconfig command now fails to create the proper
> routing table entries.  With the 2006-11-03 kernel, if I configure my
> gif0 tunnel as follows:

I can confirm my setup with Hurricane Electric also started failing at
some point:
gif_interfaces="gif0"
gifconfig_gif0="AA.BB.CC.DD 64.71.128.83"
ipv6_defaultrouter="AAAA:BBBB:CCCC:DDDD::1C"
ipv6_ifconfig_gif0="AAAA:BBBB:CCCC:DDDD::1D AAAA:BBBB:CCCC:DDDD::1C prefixlen 128"

I needed to add the following to restore the old (working) behavior:
ipv6_static_routes="defroute"
ipv6_route_defroute="AAAA:BBBB:CCCC:DDDD::1C -interface gif0"

Sean
-- 
sean-freebsd@farley.org



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