if i recall from C-Voice the mincir and cir is set on a map-class then assigned to an interface
the mincir is the actual cir rate on the circuit and the burst would be the actual number of channels assign to you times by 64k(12 channels 768). Your provider should be able to provide more information.
“Reserve your right to think, for even to think wrongly is better than not to think at all”
CIR is the commited information rate and should be = to BW contracted to the provider for that particular PVC. EIR is the excess information rate and should be = to max burst rate contracted to the provider. In general (but not always) CIR + EIR = AR (access rate) where AR is your Local Loop speed. But what is Cisco mincir?? well if you are a "good user" or "nice guy" you may set a mincir (minimum CIR) to reduce your throughput when you receive a congestion notice (BECN). Ex CIR=512 mincir=384 means that you will reduce your traffic to 384K when there is congestion on providers network in order to help the network to deal with the congestion.
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