From: M S (michaelgstout@hotmail.com)
Date: Thu May 24 2007 - 21:38:20 ART
This is accurate based on some visual traffic monitoring tools i've
observed.
I applied shapping to a bandwidth hungry customer with the expectation
that he would use BE as bandwidth was available. My presumption, which
was incorrect, was that if the AR was not being used, BE credits would be
provided. Looking at the traffic analysis showed that BE was never used.
The traffic rate was locked very tightly against the BC. This was an
excellent example of calculas limit. If the entire BC is used BE is an
impossibility.
I think the question remains, When does BE become available. Is BE
provided every Tc or is BE made available only once per second. The
simple arithmetic makes me believe it is available every Tc.
Mike
--------------------------------------------------------------------
From: "Wink" <dwinkworth@wi.rr.com>
Reply-To: "Wink" <dwinkworth@wi.rr.com>
To: "Andy" <and123and@googlemail.com>
CC: <ccielab@groupstudy.com>
Subject: Re: FRTS and Be - first interval?
Date: Thu, 24 May 2007 17:41:42 -0500
>>How does the Be bucket get filled if the line is sending at Bc rate
>>continuously, does the Be bucket get filled at the start of each
>>second?
>>each Tc? If there are no excess Bc credits how do the Be credits
>>accumulate?
>>
>>
>>-A
A:
The Be bucket does not get filled if the line is sending at Bc rate.
The Be bucket only accumulates credits in a Tc where the line is
sending at less then Bc.
So if Bc is 24000, but in that interval you only send 8000 bits, then
you will have 16000 + 24000 credits in the next interval.
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