2.4.20-27.9 and ipv6

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Hello, All!

Since upgrade at 2.4.20-27.9 (rh9) tunels 3ffe:: 
ipv4-ipv6 will not works. Tunel 2001:: work.

Will not work!
==========
sit1      Link encap:IPv6-in-IPv4
          inet6 addr: 3ffe:b00:c18::69/127 Scope:Global
          inet6 addr: fe80::d444:c40f/128 Scope:Link
          UP POINTOPOINT RUNNING NOARP  MTU:1480  Metric:1
          RX packets:22 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1408 (1.3 Kb)  TX bytes:0 (0.0 b)
==========

If I ping tunel other side I get a "local" response :
==========
PING 3ffe:b00:c18::68(3ffe:b00:c18::68) from ::1 sit1: 56 data bytes
64 bytes from ::1: icmp_seq=1 ttl=64 time=0.038 ms
64 bytes from ::1: icmp_seq=2 ttl=64 time=0.009 ms
64 bytes from ::1: icmp_seq=3 ttl=64 time=0.008 ms
==========

Work!
==========
sit5      Link encap:IPv6-in-IPv4
          inet6 addr: 2001:600:8:39::2/72 Scope:Global
          inet6 addr: fe80::d444:c40f/128 Scope:Link
          UP POINTOPOINT RUNNING NOARP  MTU:1480  Metric:1
          RX packets:49 errors:0 dropped:0 overruns:0 frame:0
          TX packets:51 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:41232 (40.2 Kb)  TX bytes:5027 (4.9 Kb)
==========

If I ping tunel other side I get a "remote" response :
==========
PING 2001:600:8:39::1(2001:600:8:39::1) from 2001:600:8:39::2 sit5: 56 data byte
s
64 bytes from 2001:600:8:39::1: icmp_seq=1 ttl=64 time=25.2 ms
64 bytes from 2001:600:8:39::1: icmp_seq=2 ttl=64 time=25.5 ms
64 bytes from 2001:600:8:39::1: icmp_seq=3 ttl=64 time=27 ms
==========

any idea?

Thanks.

Bye,
Jean-Louis


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