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From Stephan Seitz <>
Subject Re: Best NIC for XenServer?
Date Tue, 14 Jun 2016 08:11:22 GMT

XS 6.5 is built around CentOS 5 with a custom 3.10 Kernel. Using bonded
X540-AT2 NIC, I can't see any problems.
Depending on your network setup, your bond might be created and managed
by OVS instead of Kernel.
Just a guess, but OVS runs in userspace and could be affected by Dom0
RAM shortage or heavy load.
Do you run your storage network over the same bond?

On Mo, 2016-06-13 at 16:08 -0700, Michael J McCafferty wrote:
> Fellow CloudStackers,
> 	We are currently using Intel X520-DA2 NICs in our hosts. The
> hosts use
> XenServer. We have upgraded XenServer and applied periodic patches
> and
> updates to XenServer... in general done the usual maintenance. It
> seems
> that there are more issues with the NICs than expected. During
> maintenance or after reboots, very irregularly, they may disappear,
> lose
> the bond, being detected but not be configured in Xen.
> 	The HCL for XenServer 6.5 now lists the chip that is on the
> NIC, but
> not the NIC model it self. This leaves me to wonder WTF.
> 	I have to ask, is there a known "best" NIC(s) to use with
> XenServer
> going forward? Do the Intel X520-DA2 model known to be finicky with
> XenServer?
> 	What is your experience?
> Thanks!
> Mike

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