FreeBSD 9.3 - Intel X520-SR2 stops passing packets

[Guy Helmer]

> On May 21, 2015, at 6:09 PM, Eric Joyner <erj at freebsd.org> wrote:
> 
> Are there any log messages printed out by the driver? The sysctls don't really look out of the ordinary, other than the number of sub-64 byte packets.

Not that I could tell — grep of /var/log/messages and the text from the rotated messages.*.gz logs yielded nothing.

Guy

> 
> On Thu, May 21, 2015 at 9:10 AM Guy Helmer <guy.helmer at gmail.com <mailto:guy.helmer at gmail.com>> wrote:
> 
> > On May 21, 2015, at 8:52 AM, Christopher Forgeron <csforgeron at gmail.com <mailto:csforgeron at gmail.com>> wrote:
> >
> > A few things:
> >
> > 1) How long before you have this behaviour?
> >
> > 2) What's the output of 'netstat -m' when you have the problem?
> >
> > 3) What is your MTU set to, and do you have TSO on or off?
> >
> > On Thu, May 21, 2015 at 10:33 AM, Guy Helmer <guy.helmer at gmail.com <mailto:guy.helmer at gmail.com> <mailto:guy.helmer at gmail.com <mailto:guy.helmer at gmail.com>>> wrote:
> > I’ve noticed that there have been reports of problems with Intel X520-SR2 network interfaces stopping working. I think I’m seeing a similar issue where the 10Gb interfaces stop receiving traffic (they’re being used in promiscuous mode to sniff traffic from a tap). ifconfig shows the interfaces are still active and the links are OK. ifconfig down/up restores activity. I’ve changed hw.intr_storm_threshold=8000 but I couldn’t tell if the interrupt storm threshold had been triggered at the time the interfaces stopped passing traffic.
> 
> It seems to run from hours to days without problems.
> 
> I don’t have the output of “netstat -m” available, but it did not indicate any mbuf or cluster allocation failures. No jumbo clusters (4k, 9k, or 16k) were allocated.
> 
> MTU is 1500. TSO is “on” but would seem to be irrelevant — no packets are transmitted out of these interfaces (verified using “netstat -i”).
> 
> Thanks,
> Guy
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