Bottlenecks and link upgrades
Radu-Adrian Feurdean
nanog at radu-adrian.feurdean.net
Fri Aug 14 23:12:39 UTC 2020
On Wed, Aug 12, 2020, at 09:31, Hank Nussbacher wrote:
> At what point do commercial ISPs upgrade links in their backbone as
> well as peering and transit links that are congested? At 80% capacity?
> 90%? 95%?
Some reflections about link capacity:
At 90% and over, you should panic.
Between 80% and 90% you should be (very) scared.
Between 70% and 80% you should be worried.
Between 60% and 70% you should seriously consider speeding up the upgrades that you effectively started at 50%, and started planning since 40%.
Of course, that differs from one ISP to another. Some only upgrade after several months with at least 4 hours a day, every day (or almost) at over 95%. Others deploy 10x expected capacity, and upgrade well before 40%.
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