[j-nsp] MX104 limitation

Mon Mar 20 01:31:55 EDT 2017

We saw a limitation around 40Gbps when running MX80 with RE based jflow
(inline works good ) we didnt got good explanation why it limit the traffic
so try to disable some features and see if it help

Nitzan

On Mon, Mar 20, 2017 at 6:14 AM, Javier Rodriguez <rodriguezsotelo at gmail.com
> wrote:

> Mmm no, I think it doesn't  work on MX80 / MX104.
>
> JR.
>
>
> 2017-03-19 23:14 GMT-03:00 Olivier Benghozi <olivier.benghozi at wifirst.fr>:
>
> > What about bypass-queuing-chip on MIC interfaces ? Would it work on
> > MX80/104 ?
> >
> > > On 20 march 2017 at 01:32, Saku Ytti <saku at ytti.fi> wrote :
> > >
> > > Ok that's only 31Gbps total, without having any actual data, my best
> > > guess is that you're running through QX. Only quick reason I can come
> > > up for HW to limit on so modest traffic levels.
> > >
> > > On 20 March 2017 at 02:25, Javier Rodriguez <rodriguezsotelo at gmail.com
> >
> > wrote:
> > >> Soku,
> > >>
> > >> Maybe there was a misunderstanding , the inbound traffic on fpc2's LAG
> > was
> > >> 4Gbps , and the outbound traffic was 27Gbps aprox. That outbound
> traffic
> > >> enters by the fpc1 and fpc0.
> > >> It's IMIX traffic, the average packet size is 1250Bytes (out) 200Bytes
> > (in).
> > >> I tried to see dropped packets with "show precl-eng 5 statistics " and
> > "show
> > >> mqchip 0 drop stats" at pfe shell but it's 0. Does it save historical
> > data?
> > >>
> > >>
> > >> <--27G-- | | <--27G--
> > >> |FPC2 FPC 0/1 |
> > >> --4G--> |     | --4G-->
> > >>
> > >> Regards,
> > >>
> > >> Javier.
> > >>
> > >>
> > >> 2017-03-19 20:43 GMT-03:00 Saku Ytti <saku at ytti.fi>:
> > >>>
> > >>> Hey,
> > >>>
> > >>> There aren't multiple FPCs on the box really, there is only single MQ
> > >>> chip out of where all ports sit, usually MIC ports behind additional
> > >>> IX chip, which is not congested. It's architecturally single linecard
> > >>> fabricless box.
> > >>> You're saying you're pushing on the 4x10GE fixed ports 31+31Gbps,
> e.g.
> > >>> 62Gbps? It might be possible on (perhaps artificially) unfortunate
> > >>> cell alignment that it could be congested on so low values. Are all
> > >>> the packets same size, i.e is this lab scenario or just IMIX traffic?
> > >>> MQ pfe exceptions and MQ=>LU counters might be interesting to see.
> > >>>
> > >>> If you use QX chip, 62Gbps would be really good, QX chip is not
> > >>> dimensioned for line rate _unidir_ (i.e. can't do even 40Gbps). If
> you
> > >>> don't know if you're using QX or not, just deactive whole
> > >>> class-of-service and scheduer config in interfaces.
> > >>>
> > >>> On 20 March 2017 at 01:26, Javier Rodriguez <
> rodriguezsotelo at gmail.com
> > >
> > >>> wrote:
> > >>>> Hi,
> > >>>>
> > >>>> Thanks for your reply Saku.
> > >>>> The problem is that fpc2 (fixed ports) can't overcome 31Gbps (in +
> > out)
> > >>>> with 6Mpps. The graph shows a straight line as if it were being
> > limited.
> > >>>> I have moved some interfaces from LAG to fpc1 and fpc0 and the
> traffic
> > >>>> has
> > >>>> incresed. (It only has a tunnel-service in fpc0 of 1g)
> > >>>> It's as if it were being limited by the MQ, but I do not see
> discarded
> > >>>> packages, or I do not know where to look at them.
> > >>>>
> > >>>> JR.
> > >>>>
> > >>>> 2017-03-19 6:53 GMT-03:00 Saku Ytti <ytti at ntt.net>:
> > >>>>
> > >>>>> Hey Javier,
> > >>>>>
> > >>>>>
> > >>>>> MX104 and MX80 (1st gen Trio MQ/LU) should do about 55Mpps and
> 75Gbps
> > >>>>> (in+out).
> > >>>>>
> > >>>>> On 19 March 2017 at 09:12, Javier Rodriguez <
> > rodriguezsotelo at gmail.com>
> > >>>>> wrote:
> > >>>>>> Hi everyone,
> > >>>>>>
> > >>>>>> I need a bit of your knowledge.
> > >>>>>> I have a MX104 as PE router with 4 LAGs.
> > >>>>>> One LAG facing to P router on FPC2 (fixed ports). The other LAGs
> > >>>>>> distributed in FPC0 and FPC1.
> > >>>>>> The problem is that traffic is being limited when reach 28G out/
> 4G
> > >>>>>> in
> > >>>>>> (31Gbps total).
> > >>>>>> I changed one interface (10G) of the LAG (to P router) to FPC1 and
> > >>>>>> the
> > >>>>>> traffic has grown a little more.
> > >>>>>>
> > >>>>>> Where is the limitation? In the MQ chip?
> > >>>>>> Where can I see those discarded packages?
> > >>>>>> How much traffic will the router support on FPC2?
> > >>>>>> Where could I get a graphic of its internal architecture?
> > >>>>>> Does a MX80 have the same behavior?
> >
> > _______________________________________________
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> > https://puck.nether.net/mailman/listinfo/juniper-nsp
> >
>
>
>
> --
> Atte.
>
> Javier I. Rodríguez Sotelo
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