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SubjectRe: [BUG kernel 2.6.25-rc3 IPV6] ping6 -I eth0 ff02::1 causes system hang.
On Sun, 2 Mar 2008 21:07:16 +0900 Komuro <komurojun-mbn@nifty.com> wrote:

> Hi,
>
> On kernel 2.6.25-rc3, IPV6 multicast ping causes system hang
> after sending several multicast ping packet.
>
> >ping6 -I eth0 ff02::1
>
> This problem does not happen on kernel 2.6.24.
> (does not depend on NIC)
>

Let's cc the netdev list..

I tried it with 2.6.25-rc3-mm1 and got:

t61p:/home/akpm> ping6 -I eth0 ff02::1
PING ff02::1(ff02::1) from fe80::215:58ff:fec6:dc4b eth0: 56 data bytes
64 bytes from fe80::215:58ff:fec6:dc4b: icmp_seq=1 ttl=64 time=0.059 ms
64 bytes from fe80::219:d1ff:fe04:8f42: icmp_seq=1 ttl=64 time=1.74 ms (DUP!)
64 bytes from fe80::214:51ff:fe67:55ef: icmp_seq=1 ttl=64 time=2.42 ms (DUP!)
64 bytes from fe80::202:b3ff:fe8f:a731: icmp_seq=1 ttl=64 time=4.72 ms (DUP!)
64 bytes from fe80::211:24ff:fe71:cbe4: icmp_seq=1 ttl=64 time=451 ms (DUP!)
64 bytes from fe80::215:58ff:fec6:dc4b: icmp_seq=2 ttl=64 time=0.090 ms
64 bytes from fe80::202:b3ff:fe8f:a731: icmp_seq=2 ttl=64 time=0.499 ms (DUP!)
64 bytes from fe80::214:51ff:fe67:55ef: icmp_seq=2 ttl=64 time=0.542 ms (DUP!)
64 bytes from fe80::219:d1ff:fe04:8f42: icmp_seq=2 ttl=64 time=0.576 ms (DUP!)
64 bytes from fe80::211:24ff:fe71:cbe4: icmp_seq=2 ttl=64 time=0.609 ms (DUP!)
64 bytes from fe80::215:58ff:fec6:dc4b: icmp_seq=3 ttl=64 time=0.086 ms
64 bytes from fe80::202:b3ff:fe8f:a731: icmp_seq=3 ttl=64 time=0.484 ms (DUP!)
64 bytes from fe80::214:51ff:fe67:55ef: icmp_seq=3 ttl=64 time=0.527 ms (DUP!)
64 bytes from fe80::219:d1ff:fe04:8f42: icmp_seq=3 ttl=64 time=0.561 ms (DUP!)
64 bytes from fe80::211:24ff:fe71:cbe4: icmp_seq=3 ttl=64 time=0.595 ms (DUP!)
64 bytes from fe80::215:58ff:fec6:dc4b: icmp_seq=4 ttl=64 time=0.084 ms
64 bytes from fe80::202:b3ff:fe8f:a731: icmp_seq=4 ttl=64 time=0.314 ms (DUP!)
64 bytes from fe80::214:51ff:fe67:55ef: icmp_seq=4 ttl=64 time=0.352 ms (DUP!)
64 bytes from fe80::211:24ff:fe71:cbe4: icmp_seq=4 ttl=64 time=0.386 ms (DUP!)
64 bytes from fe80::219:d1ff:fe04:8f42: icmp_seq=4 ttl=64 time=0.420 ms (DUP!)
64 bytes from fe80::215:58ff:fec6:dc4b: icmp_seq=5 ttl=64 time=0.106 ms
64 bytes from fe80::202:b3ff:fe8f:a731: icmp_seq=5 ttl=64 time=0.551 ms (DUP!)
64 bytes from fe80::214:51ff:fe67:55ef: icmp_seq=5 ttl=64 time=0.593 ms (DUP!)
64 bytes from fe80::219:d1ff:fe04:8f42: icmp_seq=5 ttl=64 time=0.627 ms (DUP!)
64 bytes from fe80::211:24ff:fe71:cbe4: icmp_seq=5 ttl=64 time=0.661 ms (DUP!)
^C
--- ff02::1 ping statistics ---
5 packets transmitted, 5 received, +20 duplicates, 0% packet loss, time 3999ms
rtt min/avg/max/mdev = 0.059/18.754/451.249/88.287 ms




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