Posted on January 2, 2020 7:28 pm
 |  Asked by Chandra
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Dear Team,

Do we have support for nested/hierarchical QoS on platform 7050X, 7280R & Modular series Chassis.
I am working on one requirement, so need to understand how we can achieve nested QOS on the mentioned platform.
In case if not supported, what is the alternate option on these platforms to achieve this same support (nested QoS)?

Chandra Dimri

Posted by Aniket Bhowmick
Answered on January 3, 2020 8:35 am

Hi Chandra,

We do not support nested QoS in any Arista platforms. Do you mind sharing your exact requirement and we will see if we can come up with some workaround ?

Feel free to contact our Technical Support-


Hello Aniket, Requirement is to shape overall egress traffic to 30 Mbps when the traffic is added out of any interface on Leaf towards Spines. Categarization is mentioned below 1. Voice Traffic - Match DSCP ef -- Queue Type --Priority & Queue Size -- Max 3% even without congestion 2. Signalling Traffic - Match DSCP AF31 -- Queue Type --Normal & Queue Size -- Guarantee 5% in case of congestion 3. Video Traffic -- Match DSCP AF41 -- Queue Type --Normal & Queue Size -- Guarantee remaining 20% in case congestion 4. Class Default -- Match all the rest -- Queue Type --Normal & Queue Size -- Guarantee remaining 50% in case congestion Four Queues with Shaper of 30 Mbps (40G x 2 Links-L3 between Leaf & Spines) I understand, this is typical nested QOS requirement which is not supported on Arista platform so I would like to know workaround to achieve the same.
(Chandra at January 4, 2020 1:42 pm)

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