Greg Brackley
2012-Jul-01 02:28 UTC
CentOS 5/6 DomU network receive path stops, with xen 4.1 and Fedora16 dom0
I have an ongoing issue where two lightly loaded CentOS guests lose their network connectivity. I haven''t managed to find any specific error message in the xen log, the dom0 logs, or the domU logs. I am using a bridged network setup, using the Fedora init script to setup the bond/vlan/bridge. The VM''s can run for up to a week between outages. I can use tcpdump in dom0/domU to determine that only frames from dom0 to domU are lost (i.e. the send path looks to be ok). Generating a new VIF with ''xm network-detach'' & ''xm network-attach'' will re-establish connectivity. I am seeing the following message occasionally in the xen log, but don''t know if it is related. (XEN) traps.c:3004: GPF (0060): ffff82c480153ed9 -> ffff82c4802014f8 I''m not really sure where to investigate further. Can anyone recommend an approach to finding the issue or working around it? I have collected up some supporting information here: http://bit.ly/OOxL37 http://plone.lucidsolutions.co.nz/linux/xen/ centos-5-6-guest-network-receive-path-fails-with-xen-4.2-fedora-16-dom0 Greg.