[j-nsp] WAN input prioritization on MX

[Gustavo Santos]

Krasimir,

Just finished the  reading the class of service section from Juniper MX
Series: A Comprehensive Guide to Trio Technologies , and you are righ. What
I´m trying to do is an ingress queuing and the book talks that it´s still
unsuported on 11.4 and I checked the changelogs and on 12.2 is still
unsuported.


gustavo at BRD01# commit check
[edit class-of-service interfaces ge-1/1/4 unit 0]
  'input-shaping-rate'
    cannot configure bandwidth (pic has no CoS queuing)
error: configuration check-out failed


Gustavo Santos
Analista de Redes
CCNA , MTCNA , MTCRE, MTCINE, JUNCIA-ER



2012/10/16 Krasimir Avramski <krasi at smartcom.bg>

>
>
> On Mon, Oct 15, 2012 at 4:40 PM, Gustavo Santos <gustkiller at gmail.com>wrote:
>
>>
>> For instance: If the current wan ingress traffic total is 450mbits and
>> high
>> priority traffic is 100mbits, and low priority is 350mbits = no packet
>> discard, but if traffic towards high priority subnet is 300mbits and low
>> priority is 300mbits, then the queuing / scheduler will drop the low
>> priority traffic until the sources traffic gets shaped to 200mbits for the
>> low priority and the high priority gets 300mbits.
>>
>> On Linux it's quite simple to achieve.
>>
>>
> AFAIK this is only possible with ingress queuing (EQ2, DPC-EQ hardware,
> ingress CoS not enabled by default)  and simple filters:
>
> http://www.juniper.net/techpubs/en_US/junos10.4/topics/usage-guidelines/cos-configuring-ingress-hierarchical-cos-on-enhanced-queuing-dpcs.html
>
> http://www.juniper.net/techpubs/en_US/junos10.4/topics/concept/mf-classifiers-simple-filters-overview-cos-config-guide.html
>
> http://www.juniper.net/techpubs/en_US/junos10.4/topics/example/mf-classifiers-example-simple-filters-cos-config-guide.html
>
> Unfortunately MPCs are still not supported....
>
> Best Regards,
> Krasi
>
>