https://bugzilla.novell.com/show_bug.cgi?id=821879 https://bugzilla.novell.com/show_bug.cgi?id=821879#c22 Marius Tomaschewski <mt@suse.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |NEEDINFO InfoProvider| |jbohac@suse.com --- Comment #22 from Marius Tomaschewski <mt@suse.com> 2013-05-30 10:54:22 UTC --- (In reply to comment #18)
I did echo net.ipv6.conf.eth0.accept_dad=0 >> /etc/sysctl.conf reboot
and then, rcnetwork restart would succeed after 3.5s instead of failing after 31s ; and I could ping6 but after next boot I still get duplicate address errors maybe because network is initialized before sysctl.conf is used?
Move it to /etc/sysconfig/network/ifsysctl -- "man 5 ifsysctl"; this one is applied a) by udev, b) by ifup. (In reply to comment #19)
err. host MAC starts with FE but VM's with FA
yes, they differ. but as they're generated/random, another vm on another host still may have it.
could still be a kernel bug http://ipv6-or-no-ipv6.blogspot.de/2013/02/ipv6-duplicate-address-in-linux.h...
This could be. You aren't using bonding, are you? Linux bonding AFAIR sends out dad through each port. The ipv6 code is IMO not aware of and detects dups when it gets two answers. It basically does not check received > sent, but received > 1. See also bug#715430. Workaround is to set "disable_ipv6 = 1" or at least "accept_dad = 0" an bridge-ports & bond-slaves [where no IPv6 addr is assigned anyway]. (In reply to comment #21)
It looks as if the duplication happens in the bridge interface [...] The two packets are only 22 microseconds apart which is about the time a ping on 127.0.0.1 takes but much less than anything over the network.
also brctl showmacs br563 |grep 33:33:ff:23:f6:4d ^^^^^^^^^^^^^^^^^
This (33:33:*) is a IPv6 multicast address mapped to ethernet MAC.
does not return anything, so I guess the default bridge behaviour is to pass the packet to all ports - but should that really include the port it came from?
Host kernel is 3.0.74-0.6.8-default
I've not noticed such behavior on my hosts + vm's using same kernel. Jiri, can you take a look / do you have an idea what goes wrong here? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.