This is a very interesting situation because Leaf1 gets a higher priority than Leaf2 (when it is
in the green state), although we have configured it for a lower priority (8) than Leaf2. It is
because Leaf2 has disconnected itself from self feed at Level 0 and now is borrowing from its
parent (ClassB) which has attached to self feed at Level 1. And because of this, the priority of
Leaf2 'has traveled to Level1'. Remember that at first, we serve those classes which are at the
lowest level with the highest priority, then continuing with the next level, and so on.
3. Consider that Leaf1 has reached its max-limit and changed its state to red, and Leaf2 now uses
more than 1Mbps (and less than 2Mbps), so its parent ClassB has to borrow from ClassA and
becomes yellow. Leaf3 still has no packets to send.
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