| Dear Alex , | | What logging level is useful for you ? | | Dear Rajesh, | | Level 1 (Debug) should be enough, but I guess it probably hasn't more | help for us, you had better to login the guest then check network when you were | meeting this issue again, for example, to check if network configuration is valid and try | to restart relevant network services to see if the guest network can work again | or something like that, In addition, you shut down the guest via running 'halt' in | the guest,| Does it work for you if you use libvirt relevant interface such as | 'virsh shutdown guest' | or 'virsh destroy guest'? Dear Alex , The Guest is a minimal debian squeeze install without any GUI desktop in it . Below is the relevant /etc/network/interfaces file. # The loopback network interface auto lo iface lo inet loopback # The primary network interface allow-hotplug eth0 auto eth0 iface eth0 inet static address 192.168.101.11 netmask 255.255.0.0 gateway 192.168.1.1 ------------------------- end of interfaces file ---------------- the allow-hotplug on eth0 allow network to be automatically configured once the attach-device is done. similarly detach-device is handled gracefully. Before posting we have done multiple permutations and combinations of many config parameters and activities. This includes shutting down the guest via 'halt' and 'destroy|shutdown' from the virsh interface. It does not help or makes difference. Most surprisingly there is no alarming messages that are shown in any of the logs , be it the syslog of host or syslog of guest, I have however not seen the libvirtd.log in debug mode which i shall do in a while. I would also like to tell that the issues was discussed in the intel forum but no conclusive solution could be found. The link is: http://communities.intel.com/message/164211#164211 I am sorry for the bit late response but i assure my continued feedback regarding this issue. We are working on a test (spare) hardware and it is easy for us to test any configuration or patches The platform is : SuperMicro AMD Opteron Hardware , with IOMMU and SRIOV enabled , intel 82599EB based dual SFP+ port , linux kernel 3.5.1 from kernel.org. Regds mallah | | | Regards, | Alex | | | | Regards, | Rajesh Kumar Mallah | Tel. 91-11-46710500 (Ext:303) | Cell +919811255597 | Website: http://www.tradeindia.com/ | \|/ \|/ \|/ stop printing \|/ \|/ \|/ | | | | start planting | | |