Hello.
I have an openbsd router with 2 upstreams (one pppoe (pppoe0 on sis1),
one ipoe (sis0)).
I have a sixxs(6-in-4) tunnel (gif0).
If the gif tunnel is on one of my providers (pppoe0), it works well.
gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1280
description: Sixxs
priority: 0
groups: gif egress
tunnel: inet 109.190.17.241 -> 212.100.184.146
inet6 fe80::200:24ff:fecf:42ac%gif0 -> prefixlen 64 scopeid 0xc
inet6 2001:6f8:202:19c::2 -> 2001:6f8:202:19c::1 prefixlen 128
the 2001:6f8:3c8::/48 subnet which is routed via this tunnel
This provider gives me native Ipv6, so the tunnel is pretty useless, and
I want to put it on the other provider, which doesn't.
But when I move it on the other provider, the tunnel basicly works (I
can ping an inside box (2001:6f8:3c8:42:xxx) from the outside), but the
router does not answer to ping, on the tunnel endpoint Ipv6
(2001:6f8:202:19c::2) nor on any other interface (in 2001:6f8:3c8::/48).
Then sixxs count it as down, and will disable it if nothing is done. I
can ping from router to remote tunnel endpoint (2001:6f8:202:19c::1),
but remote tunnel endpoint does not get any answer when it ping my
router endpoint. nor does can I ping it from outside.
If I tcpdump gif0, I can see icmpv6 in and out.
Does you have any clue ?
Thanks,
--
Bastien Durel
