[Bro] Bro with 10Gb NIC's or higher

Mike Patterson mike.patterson at uwaterloo.ca
Fri Jan 9 10:20:17 PST 2015

You're right, it's 32 on mine.

I posted some specs for my system a couple of years ago now, I think.

6-8GB per worker should give some headroom (my workers usually use about 5 apiece I think).


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intelligent behavior. Complex rules and regulations give rise
to simple and stupid behavior. - Dee Hock

> On Jan 9, 2015, at 1:03 PM, Donaldson, John <donaldson8 at llnl.gov> wrote:
> I'd agree with all of this. We're monitoring a few 10Gbps network segments with DAG 9.2X2s, too. I'll add in that, when processing that much traffic on a single device, you'll definitely not want to skimp on memory.
> I'm not sure which configurations you're using that might be limiting you to 16 streams -- we're  run with at least 24 streams, and (at least with the 9.2X2s) you should be able to work with up to 32 receive streams.
> v/r 
> John Donaldson
>> -----Original Message-----
>> From: bro-bounces at bro.org [mailto:bro-bounces at bro.org] On Behalf Of
>> Mike Patterson
>> Sent: Thursday, January 08, 2015 7:29 AM
>> To: coen bakkers
>> Cc: bro at bro.org
>> Subject: Re: [Bro] Bro with 10Gb NIC's or higher
>> Succinctly, yes, although that provision is a big one.
>> I'm running Bro on two 10 gig interfaces, an Intel X520 and an Endace DAG
>> 9.2X2. Both perform reasonably well. Although my hardware is somewhat
>> underspecced (Dell R710s of differing vintages), I still get tons of useful data.
>> If your next question would be "how should I spec my hardware", that's
>> quite difficult to answer because it depends on a lot. Get the hottest CPUs
>> you can afford, with as many cores. If you're actually sustaining 10+Gb you'll
>> probably want at least 20-30 cores. I'm sustaining 4.5Gb or so on 8 3.7Ghz
>> cores, but Bro reports 10% or so loss. Note that some hardware
>> configurations will limit the number of streams you can feed to Bro, eg my
>> DAG can only produce 16 streams so even if I had it in a 24 core box, I'd only
>> be making use of 2/3 of my CPU.
>> Mike
>>> On Jan 7, 2015, at 5:04 AM, coen bakkers <cbakkers at yahoo.de> wrote:
>>> Does anyone have experience with higher speed NIC's and Bro? Will it
>> sustain 10Gb speeds or more provide the hardware is spec'd appropriately?
>>> regards,
>>> Coen
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