Nonconformance Measurement For Two-Rate Three-Color Marking; Configuring Policer Rate Limits And Actions - Juniper EX9200 Features Manual

Nonconformance Measurement for Two-Rate Three-Color Marking

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Copyright © 2016, Juniper Networks, Inc.
Two-rate three-color policer configurations include a second rate limit—the
peak-information-rate (PIR)—that you set to the expected average data rate for traffic
arriving at or departing from the interface under peak conditions.
Two-rate three-color policer configurations also include a second burst size—the peak
burst size (PBS)—that defines the maximum number of bytes for which the second token
bucket can accumulate unused peak bandwidth capacity. During periods of relatively
little peak traffic (traffic that arrives at or departs from the interface at average rates
that exceed the PIR), any unused peak bandwidth capacity accumulates in the second
token bucket, but only up to the maximum number of bytes specified by the PBS.
A traffic flow is categorized yellow if it exceeds the CIR and the available committed
bandwidth capacity accumulated in the first token bucket but conforms to the PIR.
Packets in a yellow flow are implicitly marked with
through the interface.
A traffic flow is categorized red if it exceeds the PIR and the available peak bandwidth
capacity accumulated in the second token bucket. Packets in a red flow are implicitly
marked with high PLP and then either passed through the interface or optionally discarded.
Three-Color Policer Configuration Overview on page 145
Policer Color-Marking and Actions on page 18
committed-burst-size on page 208
committed-information-rate on page 210
excess-burst-size on page 212
peak-burst-size on page 227
peak-information-rate on page 229
Chapter 4: Configuring Policer Rate Limits and Actions
PLP and then passed
medium-high
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