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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 <me@xxxxxxxxxxxx> wrote:
> On Wed, Jul 2, 2014 at 7:19 PM, Nilesh Govindrajan <me@xxxxxxxxxxxx>
> 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/
>
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>
--
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:
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LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
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