Quoting Tamas Papp ([email protected]): > hi All, > > I spent the whole day with debugging a weird network issue. On our > network there were packet losses, ping timeout and everything you can image. > I was sure, there is a loop, or faulty switch, but wasn't able really > identify the root. Sometime it was better, then the packet losses came > back after a while (last time after 5 hours...). > > Then I looked into syslog on one of servers and I saw many messages like > this: > > [772718.275810] IPv6: Neighbour table overflow
http://cosu.ro/blog/2011/09/26/ipv6-neighbour-table-overflow/ makes it sound like those are just magic values, and suggests raising them without looking into why (which I'm not saying I agree with :) http://www.arcweb.ro/blog/2011/12/13/neighbour-table-overflow-debug-ipv4-and-ipv6/ suggests blaming "occasional big spike of IPv6 ARP requests". Which could be just an accident... or could be some sort of attack. ... > The system was running without any glitch for months. > Any idea? I'm ashamed to admit I *still* haven't dived into the ipv6 pool. The msgs mean nothing to me. Maybe this rings a bell for Stéphane? Anyway if you don't actually use ipv6, then certainly disabling it seems the safer option. I prefer to disable code I'm not using. _______________________________________________ lxc-users mailing list [email protected] http://lists.linuxcontainers.org/listinfo/lxc-users
