[j-nsp] QFX5100 Buffer allocation for burst be traffic

[Nitzan Tzelniker]

We are doing using this config and it reduce the amount of drops
IIRC I did  the change without any issue


Nitzan

On Tue, May 30, 2017 at 2:26 PM, Chen Jiang <ilovebgp4 at gmail.com> wrote:

> Hi! Experts
>
> Sorry for disturbing, we are using QFX5100 virtual-chassis for
> distrubiuting storage traffic, the average traffic volume is 2-3 Gbps but
> there is burst traffic will exceed the interface bandwidth (we see there
> are tailed drop counter keep increasing in best-effort queue), so we want
> to reallocate maximum switch buffer for  egress be traffic, from the JUNOS
> document it seems there is a knob to do this:
>
> lab at qfx5100> show configuration class-of-service shared-buffer
> ingress {
>     percent 100;
>     buffer-partition lossless {
>         percent 5;
>     }
>     buffer-partition lossy {
>         percent 90;
>     }
>     buffer-partition lossless-headroom {
>         percent 5;
>     }
> }
> egress {
>     percent 100;
>     buffer-partition lossless {
>         percent 5;
>     }
>     buffer-partition lossy {
>         percent 90;
>     }
>     buffer-partition multicast {
>         percent 5;
>     }
> }
>
> Is there any experience or any best practice to do this? Thanks for your
> help!
>
>
> --
> BR!
>
>
>
>            James Chen
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