Hi - The SHAPE_VLAN146 policy-map has the Bc configured as 7680, but I can't see anything in the question that would neccesitate this or any explanation in the solution.
Is it s typo or is it required to satisfy the task?
I do not see anything either, that suggests a Bc of 7680. If there is nothing in the scenario that suggests the Tc, then I think that the Bc becomes arbitrary. There is voice, but still, it has a 32,000bit burst ("4000-byte burst value").
I think that there is no right or wrong answer for the shaping burst.
Cool - Thanks for your response!