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Chapter 14 Quality of Service (QoS)
P-870HN-51D User’s Guide
187
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.