Chapter 14 Quality of Service (QoS)
refer to packet loss priority (PLP) levels. High PLP level is referred to as red, medium is referred to as yellow and low is referred to as green. The difference between the two meters is the types of parameters used to evaluate packets. SRTCM uses committed information rate (CIR), the committed burst size and the excess burst size. TRTCM uses peak information rate (PIR), CIR, peak burst size and a committed burst size. After SRTCM and TRTCM are configured and DiffServ is enabled the following actions are performed on the colored packets:
•Red (high loss priority level) packets are dropped.
•Yellow (medium loss priority level) packets are dropped if there is congestion on the network.
•Green (low loss priority level) packets are forwarded.
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