[PVE-User] Intermittent NIC Connectivity after Host Upgrade to PVE

JR Richardson jmr.richardson at gmail.com
Fri Jul 12 13:31:46 CEST 2019

Yes, I was using latest stable, them went to unstable, it worked for a bit until reboot of VM then virtio-win-0.1.171.iso also failed. Intel E1000 NIC seems to be stable with latest PVE kernel update.


Have you tried virtio drivers 0.1.141 latest stable


-----Urspr ngliche Nachricht-----
Von: JR Richardson <jmr.richardson at gmail.com>
Gesendet: Donnerstag 11 Juli 2019 14:02
An: pve-user at pve.proxmox.com
Betreff: Re: [PVE-User] Intermittent NIC Connectivity after Host Upgrade to PVE

Oddly enough, there was another kernel update yesterday, so I updated and so far the intermittent network connectivity problem seems to have went away.
Problem appears on kernel: 4.15.18-17-pve but so far not on kernel: 4.15.18-18-pve.

The issue with the VirtIO NIC driver is still present on Win2016. Still have to run the Intel NIC on the VM.

I will do some more testing today and follow up.



Are you able to boot on a previous kernel and see if the problem returns ?


On Wed, 10 Jul 2019 at 16:06, JR Richardson <jmr.richardson at gmail.com>

> Hi All,
> I recently upgraded a host within a 4 Node Cluster from 
> pve-manager/5.2-5/eb24855a (running kernel: 4.15.18-1-pve) to
> pve-manager/5.4-10/9603c337 (running kernel: 4.15.18-17-pve).
> I had several VMs running on the host node, some Win2016 Servers and 
> Linux Servers. I migrated the VM off the host node, performed the 
> upgrade, them migrated the VMs back to the upgraded host. All seemed 
> to go well, next day I notices the Win2016 servers having intermittent 
> network connectivity, Linux servers running fine. Performing 
> continuous pings to Win2016 servers, the NIC were dropping for 45-60 
> seconds every hour or so, time was not consistent. I was using VitIO 
> for NICs.
> I did windows update and this crashed the NICs, would not come up. I 
> downloaded the latest virtio-win-0.1.171.iso and updated drivers, This 
> did restore the NICs n the VMs but still have the network drops. I 
> switched the VM NICs to Intel E1000 and still have the network drops.
> I don't see anything in the host node logs or the Win2016 VM logs 
> indicating why the network drops periodically. Could this be a PVE 
> kernel issue? I think this is more of a Win2016 issue, maybe the Intel 
> NIC driver, its using the embedded Windows driver from 2010. Should I 
> try downloading the latest driver from Intel?
> Dell R710 host node NICs:
> Ethernet controller: Broadcom Limited NetXtreme II BCM5709 Gigabit 
> Ethernet (rev 20) Ethernet controller: Intel Corporation 82576 Gigabit 
> Network Connection (rev 01)
> The NIC on the host for VMs is Broadcom. But the Linux hosts do not 
> experience any drops so i don't think this is a host node or host 
> kernel issue but I'm not sure.
> I appreciate any guidance.
> Thanks.
> JR

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