From: Joe Chang (changjoe@earthlink.net)
Date: Mon May 05 2003 - 10:17:38 GMT-3
Interesting question. Why is the recommended Tc interval in CIR 1.5 seconds
while the maximum interval in FRTS is 0.125 sec ?
Keep in mind that during congestion FRTS buffers unsent traffic in a limited
size queue. It would be desirable for the token bucket algorithm to be
re-evaluated more frequently than less, so that the queue can be relieved
more often , avoiding packet drops.
In CAR, traffic that cannot be sent is discarded, so there is not the same
sort of penalty in FRTS for longer intervals.
----- Original Message -----
From: "j" <wkfrktpdy@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, May 04, 2003 6:37 AM
Subject: Question about Bc
> In calculating CAR parameters, in
> Bc= CIR * (1byte)/(8bit) * 1.5
> Why is it necessary to multiply 1.5 at the end??
> Most of the configs I saw had Bc=CIR/8
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