Hi All,

Ever since moving from oVirt 3.1 (with Fedora image-based nodes) to oVir= =3D t 3.3 (and now 3.3.1) with CentOS 6.4 (now 6.5) nodes, I've been having a s= =3D erious problem with our Windows guests. To my knowledge, none of the = =3D Linux guests have ever been affected.

The problem appears when a Windows guest is rebooted. Occasionally= =3D this happens during maintenance work but more often as a result of Microso= =3D ft updates which require a reboot. The most recent batch of these tha= =3D t we allowed resulted in something like 35 of 40 Windows guests losing networking.

What we see is that the VirtIO Ethernet Adapter is enabled but shows no = =3D evidence of actually being connected to the network. The MAC never ap= =3D pears in our switches, etc. The solution is to connect to the guest v= =3D ia console and manually disable, then enable, the NIC. Problem solved.

I've found at least two other references to this issue:

http://forum.proxmox.com/threads/1116= =3D 0-Windows-2008-R2-Server-Standard-Edition-VIRTIO-NIC-Drivers-dont-work-on-b= =3D oot (exactly our issue)

http://forum.proxmox.com/threads/1655= =3D 0-Windows-server-2012-blue-screen-virtio-win-ethernet-card (simila= =3D r, though we never see a crash)

Needless to say, this is super annoying. Right now it seems my opt= =3D ions seem to be:

1. Implement a script to reset the NIC as suggested in the first l= =3D ink.

2. Revert to e1000 but not sure how much that will hurt performanc= =3D e and/or whether it will limit us to 1 Gbps throughput.

Has anyone experienced this? Wo= ul=3D d I likely have better luck on the VirtIO list? We've been running Vi= =3D rtIO Ethernet 61.63.103.3000 from virtio-win-0.1-65.iso but I just now foun= =3D d 61.65.104.7400 included in virtio-win-0.1-74.iso. Perhaps that will help although I don't see anything relevant in the= =3D changelog.

Thanks,

Allen Belletti

AVP Ed. Tech Engineering Innovation

Georgia Gwinnett College

678-407-5093

www.ggc.edu

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redhat.com Thu Dec 12 05:09:02 2013 Content-Type: multipart/mixed; boundary="===============0288885376006292511==" MIME-Version: 1.0 From: Dan Kenigsberg To: users at ovirt.org Subject: Re: [Users] Virtio NIC in Windows failing at boot Date: Thu, 12 Dec 2013 10:08:38 +0000 Message-ID: <20131212100838.GN6074@redhat.com> In-Reply-To: 97c686f412944d9f80995124b7d7f9b7@BN1PR04MB170.namprd04.prod.outlook.com --===============0288885376006292511== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Thu, Dec 12, 2013 at 04:06:26AM +0000, Allen Belletti wrote: > Hi All, > = > = > Ever since moving from oVirt 3.1 (with Fedora image-based nodes) to oVirt= 3.3 (and now 3.3.1) with CentOS 6.4 (now 6.5) nodes, I've been having a se= rious problem with our Windows guests. To my knowledge, none of the Linux = guests have ever been affected. > = > = > The problem appears when a Windows guest is rebooted. Occasionally this = happens during maintenance work but more often as a result of Microsoft upd= ates which require a reboot. The most recent batch of these that we allowe= d resulted in something like 35 of 40 Windows guests losing networking. > = > = > What we see is that the VirtIO Ethernet Adapter is enabled but shows no e= vidence of actually being connected to the network. The MAC never appears = in our switches, etc. The solution is to connect to the guest via console = and manually disable, then enable, the NIC. Problem solved. > = > = > I've found at least two other references to this issue: > = > http://forum.proxmox.com/threads/11160-Windows-2008-R2-Server-Standard-Ed= ition-VIRTIO-NIC-Drivers-dont-work-on-boot (exactly our issue) > = > http://forum.proxmox.com/threads/16550-Windows-server-2012-blue-screen-vi= rtio-win-ethernet-card (similar, though we never see a crash) > = > = > Needless to say, this is super annoying. Right now it seems my options s= eem to be: > = > 1. Implement a script to reset the NIC as suggested in the first link. > = > 2. Revert to e1000 but not sure how much that will hurt performance and/= or whether it will limit us to 1 Gbps throughput. > = > = > Has anyone experienced this? Would I likely have better luck on the Virt= IO list? We've been running VirtIO Ethernet 61.63.103.3000 from virtio-win= -0.1-65.iso but I just now found 61.65.104.7400 included in virtio-win-0.1-= 74.iso. Perhaps that will help although I don't see anything relevant in t= he changelog. Which version of the host kernel exposes this? Which version (in ovirt-3.1) did not? Would you copy your qemu command line? I hope that Gal (CCed) and his friends can help if they get this info. --===============0288885376006292511==--