Classification: UNCLASSIFIED Caveats: NONE
It appears to be an IPv6 routing issue rather than an IPVS issue. With the 3.8.8 kernel, the following routes to the real servers appear automatically in the routing table: 2001:x:x:x::30/128 2001:x:x:x::30 UC 0 694882451 2 bond0 2001:x:x:x::40/128 2001:x:x:x::40 UC 0 695098682 2 bond0 2001:x:x:x::50/128 2001:x:x:x::50 UC 0 870214 2 bond0 With the 3.9.3 kernel these route do not appear, and attempts to send DNS queries to the real server from the load balancer give "no route to host" errors. Manually adding routes fixes the issue: route -A inet6 add 2001:x:x:x::30/128 gw 2001:x:x:x::30 dev bond0 route -A inet6 add 2001:x:x:x::40/128 gw 2001:x:x:x::40 dev bond0 route -A inet6 add 2001:x:x:x::50/128 gw 2001:x:x:x::50 dev bond0 This seems like a kludge, but I haven't figured out what the root cause of the issue is. Howard -----Original Message----- From: Julian Anastasov [mailto:[email protected]] Sent: Wednesday, June 19, 2013 5:10 AM To: Kash, Howard M CIV (US) Cc: [email protected] Subject: Re: [lvs-users] IPv6 broken in 3.9 kernel? (UNCLASSIFIED) Hello, On Tue, 28 May 2013, Kash, Howard M CIV (US) wrote: > Classification: UNCLASSIFIED > Caveats: NONE > > > After upgrading kernels from 3.8.8 to 3.9.3, IPVS will no longer forward IPv6 > DNS packets (UDP or TCP) to the real servers. IPv4 works with the 3.9.3 > kernel. Booting back to the 3.8.8 kernel resolved the IPv6 issue. Any ideas? Do you still see this problem? I'm not using IPv6, may be others can help here. Regards -- Julian Anastasov <[email protected]> Classification: UNCLASSIFIED Caveats: NONE _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - [email protected] Send requests to [email protected] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
