#2 Question on HFSC Real Time and Upper Limit

[amuza]

Hello @rstuart,
Thank you for your clarifying explanations on Traffic Control!
I have been enjoying your explanations on HFSC but now I have a doubt.

The fourth issue is real time says nothing about what to do with
the links spare capacity. If you don't use link share as well,
the guaranteed minimum also becomes a maximum.

A. Link share will not give a class more than the upper limit.
Real time does not respect upper limit, but since link share
counts what real time sends going over the upper limit using
real time will be penalised later by link share.

Reading the paragraphs above, this is what I understand: If there is Link Share, then Real Time has no limit.
Is that correct?
If that is correct, then, in the cases when there are both Real Time and Link Share, why would we need Upper Limit?

Thank you!

[Russell Stuart]

If there is Link Share, then Real Time has no limit.

Not quite. Real Time never respects the upper limit, it doesn't matter if you use Link Share or not. Link Share always respects upper limit, and what's more also includes anything Real Time sent when it checks it.