[TriLUG] CentOS 6 with kernel v3 - bonding interface drops

[Ron Kelley via TriLUG]

Thanks everyone.  Yeah, I am getting the expected performance from the interfaces, but I don’t like seeing the drops counter going higher.  Appreciate the pointers to the bug info you listed.  I will test using a Fedora Live CD per John’s suggestion and see what I can get.

Thanks again,

-Ron


On Feb 18, 2015, at 11:15 AM, Jack Hill via TriLUG <trilug at trilug.org> wrote:

> On Wed, 18 Feb 2015, Ron Kelley via TriLUG wrote:
> 
>> Greetings all,
>> 
>> Running a couple of backup servers with CentOS6 with two 10G bonded NICs.  If I boot a v3 kernel (3.14, 3.19, etc), I see a ton of dropped packets on my bonded interface.  I tried various flavors of bonding to pinpoint the issue (mode-1, mode-6, etc), and all show the same drops. However, if I drop back to the standard CentOS 6 kernel (2.6.32) I don’t see the same behavior.
> 
> Ron,
> 
> I believe that I've seen this before (on Ubuntu) with newer kernels. My recollection is that the way Linux reports dropped packets changed at some point. Some quick searching found
> 
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/890475
> and
> https://www.novell.com/support/kb/doc.php?id=7007165
> 
> which seem related.
> 
> Sorry that I can't say for sure. Are you getting the performance that you expect from your interface?
> 
> Best,
> Jack
> -- 
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