[Bug 997978] Re: KVM images lose connectivity with bridged network

[Martin Pajak]

I faced probably the same problem installing Xen-4.3.2 with Gentoo
kernel-3.12.21.

DomU's interface hangs after short time under heavy network load
(starting at ~10Mbyte/s). From outside it looks, like the instance would
crash, but deactivating and activating the interface e.g. form the "xl
console <domU name>" with /etc/init.d/net.eth0 stop/start, restores
normal operation.

After 3 days of testing/searching I found a workaround. Setting the
following options with ethtool, I could successfully prevent my domU's
interfaces from hanging:

ethtool --offload <network device> gso off tso off sg off gro off

This http://cloudnull.io/2012/07/xenserver-network-tuning/ leeds me to
my solution.

I also posted my other expirience with this bridged network
configuration in the Gentoo wiki https://wiki.gentoo.org/wiki/Xen .

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https://bugs.launchpad.net/bugs/997978

Title:
  KVM images lose connectivity with bridged network

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