Re: Bottlenecks and link upgrades

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%.