[j-nsp] MX80 Input Scheduling/Shaping

[Saku Ytti]

This is bit nit picking but the QX isn't in any physical way tied to
the MIC slots, it's just dimensioning issue to avoid oversubscribing
the QX chip severely.

Technically the 10GE ports are the proper WAN side in MX80, MIC is
actually where the fabric normally would sit. All of the ports could
use QX for queueing, but it's just not allowed through software on the
10GE ports.


I'm not certain but I faintly recall that the fixed chassis MX80 didn't have QX.

On Sat, 6 Oct 2018 at 05:27, Tim Jackson <jackson.tim at gmail.com> wrote:
>
> The QX/Dense Queuing Block exists for the MIC slots on the MX80.
>
> Looks like you get 12 queues per MX80/104 for ingress shaping. Doesn't seem
> to be tied to QX at all. Egress you get per unit on the MIC slots though.
>
>
> https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/cos-configuring-ingress-hierarchical-cos-on-trio-mpc-mic.html
>
> https://www.juniper.net/documentation/en_US/junos/topics/concept/cos-hierarchical-scheduling-understanding-fine-grained-queuing-for.html
>
>
> On Fri, Oct 5, 2018, 8:45 PM Alexander Arseniev via juniper-nsp <
> juniper-nsp at puck.nether.net> wrote:
>
> > Hello,
> > Egress scheduling/shaping on MIC ports - correct, that's why I said
> > "roughly" equal.
> > Ingress scheduling/shaping  requires Q or EQ MPC which is not supported
> > on MX80.
> > Thanks
> > Alex
> >
> > ------ Original Message ------
> > From: sthaug at nethelp.no
> > To: arseniev at btinternet.com; juniper-nsp at puck.nether.net
> > Sent: 05/10/2018 20:20:06
> > Subject: Re: [j-nsp] MX80 Input Scheduling/Shaping
> >
> > >>Ingress scheduling is supported only on Q and EQ MPCs - Juniper MX
> > >>series book, 2nd ed, page 598.
> > >>
> > >>MX80 COS capabilities are roughly equal to MPC1, without Q.
> > >
> > >Disagree. MX80 does per-VLAN queuing/scheduling/shaping just fine for
> > >ports on MICs. *Not* for the builtin 10G ports.
> > >
> > >Steinar Haug, Nethelp consulting, sthaug at nethelp.no
> >
> > _______________________________________________
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> >
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-- 
  ++ytti