[virt-tools-list] VirtViewer and TCP Keepalives

Colin Coe colin.coe at gmail.com
Wed Sep 4 02:03:38 UTC 2013


The bulk of our users run Windows XP (32 bit) clients accessing either Win
XP or Win 7 guests.  Myself and the other sys admin run Fedora 18 and
Fedora 19 desktops respectively.  We all experience the time out problem.

Between the client PCs (Windows and Fedora), we have a pair of firewall
clusters of different brands. I am the primary administrator of the "inner"
firewall cluster but have no visibility of the outer firewall cluster.

Basically we have:

Client PCs  ---  Outer FW cluster  ---  Inner FW cluster  ---  RHEV-M and
RHEV-H (actually fat RHEL)

I have ensured that the FW cluster I maintain does not do timeouts on idle
connections.  I can ssh into a RHEL VM, and leave the SSH session idle for
days without a disconnect.  Once I get a SPICE session to a VM, if I don't
use it for about 15 minutes or so, it either freezes completely (the SPICE
session, not the VM) or disconnects with "unable to connect to the graphic



On Tue, Sep 3, 2013 at 11:20 PM, Marc-André Lureau <mlureau at redhat.com>wrote:

> ----- Original Message -----
> > Hi all
> >
> > I had a quick google and grepped through the v0.5.7 but don't see TCP
> > keepalives being used.
> >
> > We're running RHEV 3.2 in a couple of sites and find that if we have a
> > session to a VM open but idle for for around 15 minutes, it disconnects.
> > This is annoying our users.
> >
> > Is there a way to stop these idle timeouts? Would implementing TCP
> keepalives
> > be a solution?
> Since spice-gtk v0.10, sockets are set with keepalive.
> Are you testing with a Windows client or on RHEL?
> Can you tell more about the client & networking setup?
> thanks

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