From: Jason Alex (amr.ccie@gmail.com)
Date: Sun Mar 08 2009 - 10:34:33 ARST
Dear All,
I have a question related to frame relay traffic shaping
as i know
Bc = CIR * Tc/1000
So for CIR = 512000 bps
Bc = 512000*125/1000 = 64000 bits
and the output of the sh traffic-shape as below
1800-R5#sh traffic-shape
Interface Se0/0/0
Access Target Byte Sustain Excess Interval Increment Adapt
VC List Rate Limit bits/int bits/int (ms) (bytes)
Active
503 512000 24000 64000 128000 125 8000 -
but when CIR = 1024000 bps
Bc = 1024000 * 125/1000 = 128000
why the traffic-shape output shows that Tc = 63 msec not 125 msec
3600-R3#sh traffic-shape
Interface Se0/0
Access Target Byte Sustain Excess Interval Increment Adapt
VC List Rate Limit bits/int bits/int (ms) (bytes)
Active
304 1024000 8064 128000 0 * 63* 8064 -
pleas advice as i am confused why the Tc in the secound example = 63 but i
calcualted the Bc for Tc = 125 msec
Appreciate your help
Regards
Blogs and organic groups at http://www.ccie.net
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