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Is there any common method (usable in practice) for estimating the uplink capacity of switch based on known number of users connected to this switch and the maximum internet speed they are allowed.
This is an example topology:
core switch ==== aggregation switch ---- access switch 1 ---- 10 users |----- access switch 2 ---- 30 users |----- access switch 3 ---- 50 users
I want to find the needed capacity (or maximum traffic in the busiest hour) for the links between aggregation switch and access switches 1, 2 and 3. I know they will be allowed to have maximum internet speed of 50 Mbit/s and no transfer between users.
In the worst case they will all download at 50 Mbit/s, so 50 users * 50Mbits/s = 2500Mbit/s but this case will almost never happen as the traffic comes on bursts and it will be waste of resources.
So I need a general method, best practices or any guide for this job. All I find in the Internet is theory with almost scientific value, but no information how they do it in IPSs and telecommunication companies in practice.