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New Member

Frame Relay Traffic Shaping and CBWFQ

I am using frame-relay traffic shaping and also CBWFQ. I did not set a mincir value so by default it got set at 1/2 x cir(which I set at the true access rate). With CBWFQ, I set each class in my policy with "bandwidth percent". Because I did not set the mincir value, it is taking the bandwidth percent from the default value which is neither my true access rate or CIR rate. Should this be a concern? I used "bandwidth percent" more to give each class a priority ratio. My bandwidth percents for my four classes are 45, 30, 15, and 10. So during congested periods, I was hoping that my bandwidth would be distributed in a 45:30:15:10 ratio. Or should I be concerned with the bandwidth that is being guaranteed for each class which would be 45% of (1/2 x cir), 30% of (1/2 x cir), etc. which really would not reflect either my true access rate or CIR.

  • Other Network Infrastructure Subjects
New Member

Re: Frame Relay Traffic Shaping and CBWFQ


Take a look at the comparsion of the BANDWIDTH and PRIORITY commands at The bottom of this page shows a few examples for enforcing the ratio you are trying to maintain.

The configuration notes at should help you to better understand your particular situation.

And this paragraph provides some detail on CBWFQ Bandwidth Allocation considerations.

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