[Bro] Myricom and Bro... show of hands for successful deployments on 10G links (with > 5Gpbs)

Vlad Grigorescu vlad at grigorescu.org
Fri Aug 22 11:44:53 PDT 2014

Hi Harry,

Can you expand on "allowing both capture and writing to disk?" Carnegie
Mellon runs a Bro cluster with Myricom NICS, which works well. However, the
manager is on a box that doesn't have any workers on it (and thus doesn't
receive any traffic), so I haven't had any I/O contention from network
traffic and log writing. Is that what you're referring to?

We're seeing about 16 Gbps and dropping < 1% (around 0.1% most of the time,
I believe). That's split up over 4 rather beefy boxes, though.


On Thu, Aug 21, 2014 at 10:26 AM, Harry Hoffman <hhoffman at ip-solutions.net>

> Hi All,
> So, I’m writing to hopefully get a show of hands from those of your out
> there who’ve employed Myricom cards to capture packets on your 10G links.
> I’ll start by saying that while the myricom cards we have in place do a
> fine job of capturing I’ve been unable to find the secret sauce that allows
> both capture and writing to disk in a way that doesn’t drop significant
> amounts of packets using either bro, tcpdump, snort, suricata.
> For those of you out there using myricom cards in conjunction with your
> favorite tools (bro of course ;-)  ) can you let me know what data rate
> your Myricom cards are seeing and what (assuming some) percentage of
> packets you are dropping?
> If you aren’t dropping anything I’d love to know more about your setup! :-)
> Cheers,
> Harry
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