Dropping network connection - Proxmox 1.9 - Server 2008 R2

[plight]

Hello. I recently did a fresh install of proxmox 1.9 and a windows server guest that is acting as a very active ftp server (1tb+ of transfers). It seems to be losing its network connection intermittently. There is no pattern. Looking through the logs on the windows side shows me nothing. It still says its connected to network, but is unable to go anywhere. The network will then come back on its own after 30 minutes or so.

I can not find any network related logs or tools I can run on the host side that can help me verify this is not a KVM issue. I am using virtio for net.

Any help? Are there any ways I can verify that the network is correctly passing through to the guest?

 

[tom]

pls post also your 'pveversion -v', also detailed version of your virtio win drivers and your VMID.conf file.

 

[plight]

pve-manager: 1.9-24 (pve-manager/1.9/6542)
running kernel: 2.6.32-6-pve
proxmox-ve-2.6.32: 1.9-47
pve-kernel-2.6.32-6-pve: 2.6.32-47
qemu-server: 1.1-32
pve-firmware: 1.0-14
libpve-storage-perl: 1.0-19
vncterm: 0.9-2
vzctl: 3.0.29-2pve1
vzdump: 1.2-16
vzprocps: 2.0.11-2
vzquota: 3.0.11-1
pve-qemu-kvm: 0.15.0-1
ksm-control-daemon: 1.0-6

virtio network drivers:
Provider: Qumranet
Date: 5/12/2008
Driver Version: 1.2.0.0

VMID.CONF
bootdisk: ide0
ostype: w2k8
ide0: VM_Storage:103/vm-103-disk-1.qcow2
memory: 2048
onboot: 1
sockets: 1
vlan0: virtio=56:06:5B:39:47:67

 

[tom]

why don´t you use the latest virtio net drivers? see http://archive.fedoraproject.org/pub/alt/virtio-win/latest/images/bin/ and test again.

 

[MrJacK]

Use the latest driver as proposed by Tom :

10/08/2011
60.62.102.2000

In the driver properties, go to the Advanced tab, select Offload Tx LSO, choose disabled.
Does this help ?