Bottlenecks and link upgrades

Thu Aug 13 11:18:48 UTC 2020

On 13/Aug/20 13:00, Nick Hilliard wrote:

>
> you could easily have 10% utilization and see packet loss due to
> insufficient bandwidth if you have egress << ingress and
> proportionally low buffering, e.g. UDP or iSCSI from a 40G/100 port
> with egress to a low-buffer 1G port.
>
> This sort of thing is less likely in the imix world, but it can easily
> happen with high capacity CDN nodes injecting content where the
> receiving port is small and subject to bursty traffic.

Indeed.

The smaller the capacity gets toward egress, the closer you are getting
to an end-user, in most cases.

End-user link upgrades will always be the weakest link in the chain, as
the incentive is more on their side than you, their provider. Your final
egress port buffer sizing notwithstanding, of course.

Mark.