ZyXEL P-870MH-C1 User Guide - Page 208
Table 73, QoS Policer Setup: Add
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Chapter 16 Quality of Service (QoS) Table 73 QoS Policer Setup: Add LABEL DESCRIPTION Meter Type Select how the policer shapes the traffic of the member QoS classes. The Simple Token Bucket algorithm uses tokens in a bucket to control when traffic can be transmitted. Each token represents one byte. The algorithm allows bursts of up to b bytes which is also the bucket size. The Single Rate Three Color Marker (srTCM) is based on the token bucket filter and identifies packets by comparing them to the Committed Information Rate (CIR), the Committed Burst Size (CBS) and the Excess Burst Size (EBS). Committed Rate Committed Burst Size The Two Rate Three Color Marker (trTCM) is based on the token bucket filter and identifies packets by comparing them to the Committed Information Rate (CIR) and the Peak Information Rate (PIR). Specify the committed rate. When the incoming traffic rate of the member QoS classes is less than the committed rate, the device applies the conforming action to the traffic. Specify the committed burst size for packet bursts. This must be equal to or less than the peak burst size (two rate three color) or excess burst size (single rate three color) if it is also configured. This is the maximum size of the (first) token bucket in a traffic metering algorithm. Excess Burst Specify the burst size of packet bursts above which the device will Size perform the non-conforming action. Peak Rate Specify the peak rate. When the incoming traffic rate of the member QoS classes is greater than the peak rate, the device applies the nonconforming action to the traffic. Peak Burst Specify the peak burst size. This is the maximum size of the second Size token bucket in the trTCM. Conforming Specify what the Device does for packets within the committed rate and Action burst size (green-marked packets). Partial Conforming Action • Pass: Send the packets without modification. • DSCP Mark: Change the DSCP mark value of the packets. Enter the DSCP mark value to use. Specify what the Device does for packets that exceed the committed rate and burst size but are within the excess burst size or peak rate and burst size (yellow-marked packets). NonConforming Action • Pass: Send the packets without modification. • Drop: Discard the packets. • DSCP Mark: Change the DSCP mark value of the packets. Enter the DSCP mark value to use. The packets may be dropped if there is congestion on the network. Specify what the Device does for packets that exceed the excess burst size or peak rate and burst size (red-marked packets). • Drop: Discard the packets. • DSCP Mark: Change the DSCP mark value of the packets. Enter the DSCP mark value to use. The packets may be dropped if there is congestion on the network. 208 P-870HN-5xb User's Guide