On Tue, 2 Apr 2019, Tom Ammon wrote:
Netflow for historical data is great, but I guess what I am really asking is - how do you anticipate the load that your eyeballs are going to bring to your network, especially in the face of transport tweaks such as QUIC and TCP BBR?
I don't see how QUIC and BBR is going to change how much bandwidth is flowing.
If you want to make your eyeballs happy then make sure you're not congesting your upstream links. Aim for max 50-75% utilization in 5 minute average at peak hour (graph by polling interface counters every 5 minutes). Depending on your growth curve you might need to initiate upgrades to make sure they're complete before utilization hits 75%.
If you have thousands of users then typically just look at the statistics per user and extrapolate. I don't believe this has fundamentally changed in the past 20 years, this is still best common practice.
If you go into the game of running your links full parts of the day then you're into the game of trying to figure out QoE values which might mean you spend more time doing that than the upgrade would cost.
-- Mikael Abrahamsson email: swm...@swm.pp.se
