Nilesh, How long does the upload take? Its not a simple question of TCP time out?
Take a look at : http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.services.general.html#tcpip_idle_timeout On 2 July 2014 19:24, Nilesh Govindrajan <m...@nileshgr.com> wrote: > On Wed, Jul 2, 2014 at 7:19 PM, Nilesh Govindrajan <m...@nileshgr.com> > wrote: > > Hi, > > > > We have a setup - 1 director and 2 real servers and LVS TUN is used > > because they're located at different places. > > > > Now, the problem is that whenever someone tries to upload a large > > image (~400 KB) via CloudFlare, it just gets stuck and fails. The same > > works when I do it directly. > > > > Tried contacting CloudFlare, and they say everything is right on their > side. > > > > I suspect this has something to do with LVS Tun. What could be the > problem? > > > > Tried setting MTU = 1400 as per > > > http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.LVS-Tun.html#setting_mtu_by_route > > but that doesn't help either. > > Okay some info on the MTU thing, I was seeing ICMP frag required > messages in tcpdump on director. > As per the guide, I changed MTU of outgoing interface on real servers > to 1480 and changed MTU of tunnel to 1500. It stopped those messages > and now I see lot of packets with F flag possibly indicating that > fragmentation works correctly. But uploads still don't work. > > _______________________________________________ > Please read the documentation before posting - it's available at: > http://www.linuxvirtualserver.org/ > > LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org > Send requests to lvs-users-requ...@linuxvirtualserver.org > or go to http://lists.graemef.net/mailman/listinfo/lvs-users > -- Regards, Malcolm Turnbull. Loadbalancer.org Ltd. Phone: +44 (0)330 1604540 http://www.loadbalancer.org/ _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org Send requests to lvs-users-requ...@linuxvirtualserver.org or go to http://lists.graemef.net/mailman/listinfo/lvs-users
