Hi,
I've found that dom0 <-> domU begin loss ~ 20% packets on high UDP
traffic (with bridged virtual network setup).
The fix is to increase txqueuelen on vif* interfaces which is very low
(32) by default.
Tested with Centos 6.5, 3.10.23-11.el6.centos.alt.x86_64
xen-4.2.3-26.el6.centos.alt
P.S. This problem widely discussed in the internet, but nobody publish
this fix (why?)
http://serverfault.com/questions/442674/xen-pv-packet-loss
http://lists.xen.org/archives/html/xen-users/2009-01/msg00381.html
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