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
