IEWB--- Be calculations.

From: prashant shukla (shukla_cisco@yahoo.co.in)
Date: Sun Jan 14 2007 - 04:31:54 ART


  Gurus,

 This is what i understand and need clarification on.
 AR= 512Kbps ; CIR = 64Kbps.

 Bc= CIR x Tc / 1000
 Be= (AR-CIR) x Tc / 1000

#1. So im able to the above calculation if the question mentions " allow DLCi 103 to burst upto port speed " then the Be formula works with (512-64)kbps x TC/1000, my doubt comes when the question says, " Allow the DLCI to burst upto 128 /384 Kbps for 32ms or 64ms etc etc." here how to look for the Be, as the burst is not upto port speed, so im struggling to find a "Universal rule".

 #2.Secondly; in questions where its not mentioned any Tc value I would like to
 go for 125ms as default, what other "Signs" i should look for where the Tc value can be influenced, e.g. In one IEWB it mentions " The packet above 960 bytes should be fragmented". Is this a catch!! as the the Tc chosen made .

hope i was clear enough... :-)

Shukla.

                                 
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