CIR & PIR
In Metro Ethernet links, the traffic rates are not stable always. Sometimes the traffic rates increase, sometimes they decrease. To overcome and manage this issue, some key parameters are used. This parameters provide to determine guaranteed (without loss) traffic rates, burst traffic rates and drop limits.

CIR (Committed Information Rate) is the minimum guaranteed traffic delivered in the network.

PIR (Peak Information Rate) is the top bandwith point of allowed traffic in a non busy times without any guarante.

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