Hi,
IPv6 autoconfiguration with -STABLE and Dlink DFE-550TX network adapters is
not working as it should.
My network topology is simple : 3 machines on the same ethernet segment,
connected by a 10/100 hub. They are running 4.4-RC as of today and use the
same NIC, a Dlink DFE-550TX (ste driver).
Initialy running the 'rtsol ste0' command on a client machines did not give
any result.
I then tried to see what was going on on the wire by running tcpdump. This
modified the behavior of the machine running it.
Here are some tcpdump results observed after running a single 'rtsol' command
on the client:
Router and client interfaces in normal mode.
traffic captured from an other machine on the same hub:
10:19:50.036 fe80::250:baff:fe71:bded > ff02::2: icmp6: router solicitation
10:19:54.055 fe80::250:baff:fe71:bded > ff02::2: icmp6: router solicitation
10:19:58.075 fe80::250:baff:fe71:bded > ff02::2: icmp6: router solicitation
Tcpdump running on the router.
The router and an other machine on the wire show the same results:
10:20:42.590 fe80::250:baff:fe71:bded > ff02::2: icmp6: router solicitation
10:20:42.882 fe80::250:baff:fe15:69fc > ff02::1: icmp6: router advertisement
10:20:46.609 fe80::250:baff:fe71:bded > ff02::2: icmp6: router solicitation
10:20:46.742 fe80::250:baff:fe15:69fc > ff02::1: icmp6: router advertisement
10:20:50.629 fe80::250:baff:fe71:bded > ff02::2: icmp6: router solicitation
10:20:50.802 fe80::250:baff:fe15:69fc > ff02::1: icmp6: router advertisement
The client does not get configured.
Tcpdump running on the client, router interface in normal mode
The client and the observation machine show the same results:
10:22:04.575 fe80::250:baff:fe71:bded > ff02::2: icmp6: router solicitation
10:22:08.595 fe80::250:baff:fe71:bded > ff02::2: icmp6: router solicitation
10:22:12.615 fe80::250:baff:fe71:bded > ff02::2: icmp6: router solicitation
The client does not get configured.
Tcpdump running on the client and the router.
All three machines show the same results:
10:25:23.608 fe80::250:baff:fe71:bded > ff02::2: icmp6: router solicitation
10:25:24.083 fe80::250:baff:fe15:69fc > ff02::1: icmp6: router advertisement
10:25:24.084 :: > ff02::1:ff71:bded: icmp6: neighbor sol: who has [client]
Here, the client machine gets configured.
It seems that only the machines having their interface in promiscuous mode
were able to receive the multicast datagrams. They then ran as they should
have, which leads me to think the problem is not with the card itself.
Is this a known problem with the ste driver ?
How can I be sure the client does not receive the advertisement without
running tcpdump ?
Thanks in advance,
Francois Tigeot
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