Bottlenecks and link upgrades

Thu Aug 13 11:00:56 UTC 2020

Mark Tinka wrote on 13/08/2020 11:31:
> It's great to monitor packet loss, latency, pps, e.t.c. But packet loss
> at 10%  link utilization is not a foreign occurrence. No amount of
> bandwidth upgrades will fix that.

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.

Nick