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Description of problem: When increasing the TCP Receive Window in the windows TCP settings, large spikes in traffic can cause complete network traffic loss in the domU with no recovery. Version-Release number of selected component (if applicable): xenpv-win 1.0.0 Windows 2003 32-bit and 64-bit How reproducible: always Steps to Reproduce: 1. In Windows 2003 (32 bit was tested), change the default tcp receive window size to 256K by setting the registry value "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Afd\Parameters\DefaultReceiveWindow" to 262144. If this value doesn't exist, create a REG_DWORD for 'DefaultReceiveWindow'. 2. Reboot the host. 3. Connect to the domU host using Remote Desktop. 4. Start a 'ping -t' to some responsive host. 5. In another window, download a large file (>=300MB) from a relatively fast, close host. Actual results: Very shortly after starting the download, the Remote desktop connection will be cease to be responsive. Approximately 30-60 seconds later, it may return. If it returns, you should also see that the local ping task has experienced timeouts as well. Expected results: no traffic loss Additional info:
This request was evaluated by Red Hat Product Management for inclusion in the current release of Red Hat Enterprise Linux. Because the affected component is not scheduled to be updated in the current release, Red Hat is unfortunately unable to address this request at this time. Red Hat invites you to ask your support representative to propose this request, if appropriate and relevant, in the next release of Red Hat Enterprise Linux.
James, any news on this?
Paolo, I don't believe this is reproducible by the original reporter. I am closing this insufficient data for now. - James