[c-nsp] ASR9k Bundle QoS in 6.0.1

[Adam Vitkovsky]

> Saku Ytti
> Sent: Thursday, May 12, 2016 1:18 PM
>
> On 12 May 2016 at 15:06, Robert Williams <Robert at custodiandc.com> wrote:
> > Although thinking about it, can't the central arbiter simply treat it as one
> virtual queue and distribute the 'tokens' to multiple NPs in a round-robin
> style? Would it be that significantly different from sending multiple separate
> streams to separate NPs as in the current model (when used for egress
> queueing multiple ingress ports to a single egress port)?
>
> There isn't any central arbiter which is aware of all request/grants.
In contrary to TRIO, ASR9K actually has a central arbiter aware of all the access requests and grants.

> And even if there was, it has no visibility on port's queues. So that wouldn't
> work.
But this piece is correct. There are 4 VOQs per 10GE entity obviously with no fixed mapping to egress queues (even if you'd used just 4 queues)
(only PTX/QFX boxes have VOQ per egress queue though they don't have a central arbiter as far as I know).

adam


        Adam Vitkovsky
        IP Engineer

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