> Just a momentary thought: if this is only occurring with "push" > transfers to realservers, then there may be some object in the L3 or L2 > path which isn't capable of larger MTU and is disrupting the traffic > flow. > > Are you, by any chance, using systems connected to a gigabit ethernet > network? This sounds to me like a possible issue with jumbo frames not > making it through something - or something like that.
The thing is the problem only manifests when the traffic stays wholly within the vSwitch. As soon as it has to touch some outside device, everything is fine. > Alternatively, have you switched off TCP checksum offloading? This has > been the cause of some problems in the past. Haven't looked at that, but surely if it can be made to work fine just by separating the hosts with another switch, that's not the problem ? -- Christopher Smith UNIX Team Leader Nighthawk Radiology Services Limmatquai 4, 6th Floor 8001 Zurich, Switzerland http://www.nighthawkrad.net Sydney Fax: +61 2 8211 2333 Zurich Fax: +41 43 497 3301 USA Toll free: 866 241 6635 Email: [email protected] IP Extension: 8163 Sydney Phone: +61 2 8211 2363 Sydney Mobile: +61 4 0739 7563 Zurich Phone: +41 44 267 3363 Zurich Mobile: +41 79 550 2715 All phones forwarded to my current location, however, please consider the local time in Zurich before calling from abroad. CONFIDENTIALITY NOTICE: This email, including any attachments, contains information from NightHawk Radiology Services, which may be confidential or privileged. The information is intended to be for the use of the individual or entity named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited. If you have received this email in error, please notify NightHawk Radiology Services immediately by forwarding message to [email protected] and destroy all electronic and hard copies of the communication, including attachments. _______________________________________________ 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
