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Date:      Thu, 12 Sep 2002 13:19:34 +0200
From:      Juan Francisco Rodriguez Hervella <jrh@it.uc3m.es>
To:        Lista <freebsd-net@freebsd.org>, "(Lista) snap-users@kame.net" <snap-users@kame.net>, Octavio.Medina@enst-bretagne.fr, Jean-Luc.Richier@imag.fr
Subject:   Reencapsulate IPv6-over-IPv6 "over" IPv4 doesn't work for me, but it  should, right ?
Message-ID:  <3D807846.FD8163F1@it.uc3m.es>

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Hello:

Sorry for this cross-posting.

I have the following configuration:

gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1280
        tunnel inet aaa.aaa.aaa.aaa --> bbb.bbb.bbb.bbb
        inet6 3ffe:3328:6::f571 prefixlen 126
        inet6 fe80::290:27ff:fe86:93d%gif0 prefixlen 64 scopeid
0xa        

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      

To reach "3ffe:3326:3:920::1", I go through "gif0":
root@mira:~# netstat -rn | grep 3ffe:3326:3:9 
3ffe:3326:3:900::/56              fe80::d560:d738%gif0         
UG1c       gif0    

When I exec "ping6 3ffe:3328:6::f545", this happens:

root@mira:~# ping6 3ffe:3328:6::f545
PING6(56=40+8+8 bytes) 3ffe:3328:6::f544 --> 3ffe:3328:6::f545
ping6: sendmsg: Input/output error
ping6: wrote 3ffe:3328:6::f545 16 chars, ret=-1
ping6: sendmsg: Input/output error
ping6: wrote 3ffe:3328:6::f545 16 chars, ret=-1      


Im using FreeBSD-4.5 with two patches to run the DSTM transition
mechanism (http://www.ipv6.rennes.enst-bretagne.fr/dstm/inst-45.html)
One patch to obtain IPv6-RPCs and the other to install the mechanism.

I don't know if this is a problem of FreeBSD-4.5" or if it's
caused by the patches.

It's possible to configure the number of "gif" loops using sysctls or
something like that ? Does standard FreeBSD has support for it or only
KAME snaps ? Have anyone heard or similar problems ?

Best Regards.


-- 
JFRH.

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