[PVE-User] Confusing about Bond 802.3ad

Josh Knight josh at noobbox.com
Fri Aug 24 23:16:30 CEST 2018


sorry, should say "mausezahn". It's a part of Netsniff
http://netsniff-ng.org/


On Fri, Aug 24, 2018, 5:15 PM Josh Knight <josh at noobbox.com> wrote:

> Just guessing here, if the switch doesn't support rr on its port channels,
> then using separate VLANs instead of bundles on the switch is essentially
> wiring nodeA to nodeB. That way you don't hit the port channel hashing on
> the switch and you keep the rr as-is from A to B.
>
> I would also try using UDP mode on iperf to see if it's TCP retransmission
> that's preventing you from getting closer to 4Gbps. Another useful tool is
> maisezahn for traffic generation, though it is more complex to run.
>
>
> On Fri, Aug 24, 2018, 4:59 PM Gilberto Nunes <gilberto.nunes32 at gmail.com>
> wrote:
>
>> I can get 3 gbps. At least 1.3 gbps.
>> Don't know why!
>> Em 24/08/2018 17:36, "mj" <lists at merit.unu.edu> escreveu:
>>
>> > Hi Mark,
>> >
>> > On 08/24/2018 06:20 PM, Mark Adams wrote:
>> >
>> >> also, balance-rr through a switch requires each nic to be on a seperate
>> >> vlan. You probably need to remove your lacp config also but this
>> depends
>> >> on
>> >> switch model and configuration. so safest idea is remove it.
>> >>
>> >
>> > <snip>
>> >
>> > then I belive your iperf test will return ~3Gbps... i seem to remember
>> >> performance doesnt get much better than this but I cant remember why.
>> >>
>> >> Also can't say if this is a good setup for ceph performance..
>> >>
>> >
>> > This is really interesting info, i did not know this. Someone has tried
>> > this with ceph? Any experiences to share..?
>> >
>> > Strange that performence turns out to be ~3Gbps, instead of the expected
>> > 4...
>> >
>> > Anyone with more information    on this subject?
>> >
>> > Have a nice weekend all!
>> >
>> > MJ
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