Date: Thu, 12 Sep 2002 13:37:24 +0200 From: Francis Dupont <Francis.Dupont@enst-bretagne.fr> To: snap-users@kame.net Cc: Lista <freebsd-net@freebsd.org>, Octavio.Medina@enst-bretagne.fr, Jean-Luc.Richier@imag.fr Subject: Re: (KAME-snap 6885) Reencapsulate IPv6-over-IPv6 "over" IPv4 doesn't work for me, but it should, right ? Message-ID: <200209121137.g8CBbO6o083811@givry.rennes.enst-bretagne.fr> In-Reply-To: Your message of Thu, 12 Sep 2002 13:19:34 %2B0200. <3D807846.FD8163F1@it.uc3m.es>
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In your previous mail you wrote:
gif1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1280
tunnel inet6 2001:720:1500:30::2 --> 3ffe:3326:3:920::1
inet6 fe80::290:27ff:fe86:93d%gif1 prefixlen 64 scopeid 0xe
inet6 3ffe:3328:6::f544 prefixlen 126
inet6 2001:720:1500:30::2 prefixlen 128
=> you have the same address for the tunnel encapsulation and
the tunnel itself. This will give infinite recursive encapsulation
which is detected (in this easy case only) and gives an EIO error
with a log notice like "gif_output: recursively called too many times...".
I don't know if this is a problem of FreeBSD-4.5" or if it's
caused by the patches.
=> try to set MAX_GIF_NEST (kernel option) to a small value
(default seems to be 1 which is too small for you) and
please cleanup your config (no recursive use of addresses,
/64 prefixes on link, etc).
Regards
Francis.Dupont@enst-bretagne.fr
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