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Cisco Shaping Algorithm Question

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Hi Guys,

Let's say that i have the following configuration for traffic shaping on my router:

shape average 1000000 125000 3000000

So my shaping paramters are:
CIR: 1,000,000 bit/sec
Bc:   125,000 bits
Be:   3,000,000 bits
Tc:   125ms
So every 125ms the shaper runs and sends 125,000 bits of data.  This happens 8 times per second for a rate of 1,000,000 bits/sec.  
Now, if the router is idle, since i have a very large Be, I can build up credit.  So if i'm idle for 2 seconds, does that mean that i can build up 2,000,000 bits worth of credit and then send it out all at once?  If so, wouldn't I exceed my CIR of 1,000,000 bits per second?  Or does it only allow you to build up credit upto 1 second worth not to exceed the CIR?
Thanks.

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