LACP LAGG device problems

Adrian Chadd adrian at
Sun Jul 21 18:31:38 UTC 2013


I now work at netflix. We push >10gig per box. I'm working on making
that much, much more than 10gig. It's not a "science project."

sheesh. :-)


On 21 July 2013 09:23, Barney Cordoba <barney_cordoba at> wrote:
> I wasn't referring to science projects. Nor did I say it wasn't useful.
> Only that 10g is cheap now and quite a bit better. LAGG isn't perfect.
> ----- Original Message -----
> From: Adrian Chadd <adrian at>
> To: Barney Cordoba <barney_cordoba at>
> Cc: freebsd-net at; isp <mline at>
> Sent: Sunday, July 21, 2013 9:49 AM
> Subject: Re: LACP LAGG device problems
> Hah!
> I'm pushing 20GE out using lagg right now (and fixing the er, amusing
> behaviour of doing so.) I'm aiming to hit 40 once I get hardware that
> doesn't get upset pushing that many bits. The netops people at ${JOB}
> also point out that even today switches occasionally get confused and
> "crash" a switchport. Ew.
> So yes, there are people using lagg, both for failover and throughput reasons.
> I'm working on debugging/statistics right now as part of general "why
> are things behaving crappy" debugging. I'll see about improving some
> of the peer reporting at the same time.
> -adrian
> On 21 July 2013 06:03, Barney Cordoba <barney_cordoba at> wrote:
>> --------------------------------------------
>> On Sat, 7/20/13, isp <mline at> wrote:
>>  Subject: LACP LAGG device problems
>>  To: freebsd-net at
>>  Date: Saturday, July 20, 2013, 10:04 AM
>>  Hi! Can anybody tell me, is there any plans to improve
>>  LAGG(802.3ad)
>>  device driver in FreeBSD?
>>  It will be greate to have a possibility to set LACP mode
>>  (active/passive)
>>  and system priority.
>>  Also there is no way to set hashing algorithm and master
>>  interface
>>  (port).
>>  And we can't see any information about our neighbor.
>>  The same function in Linux is named Bonding and it is much
>>  more better.
>>  I realy can donate some money to those who can make this
>>  improvements.
>>  Best regards.
>>  >
>>  _______________________________________________
>> Why are you using LAGG when 10g cards are like $350? It's not
>> a peering protocol nor it is PTP; can you see your "peer" info on
>> an ethernet?
>> Bonding is a late 90s concept designed to connect 2 slow links to
>> get higher speeds, back in the day when 100Mb/s was ambitious.
>> The point of LAGG is that it's transparent; you can load balance
>> traffic to multiple hosts or create a redundant link without having
>> to have equipment running some special applications, or any special
>> logic above the LAGG device.
>> Describing how you are using LAGG (and why) might be better
>> than just asking for "improvements".
>> BC
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