Juniper EX9200 Features Manual page 196

Traffic Policers Feature Guide for EX9200 Switches
Requirements
Overview
178
Configuration on page 179
Verification on page 182
Before you begin, make sure that the logical interface to which you apply the three-color
logical interface policer is hosted on a Gigabit Ethernet interface (
Ethernet interface ( ) on an MX Series router.
xe-
A two-rate three-color policer meters a traffic flow against a bandwidth limit and
burst-size limit for guaranteed traffic, plus a second set of bandwidth and burst-size
limits for peak traffic. Traffic that conforms to the limits for guaranteed traffic is
categorized as green, and nonconforming traffic falls into one of two categories:
Nonconforming traffic that does not exceed the bandwidth and burst-size limits for
peak traffic is categorized as yellow.
Nonconforming traffic that exceeds the bandwidth and burst-size limits for peak traffic
is categorized as red.
A logical interface policer defines traffic rate-limiting rules that you can apply to multiple
protocol families on the same logical interface without creating multiple instances of
the policer.
NOTE: You apply a logical interface policer directly to a logical interface at
the logical unit level, and not by referencing the policer in a stateless firewall
filter and then applying the filter to the logical interface at the protocol family
level.
Topology
In this example, you configure the two-rate three-color policer
logical interface policer and apply the policer to incoming Layer 2 traffic on logical interface
.
ge-1/3/1.0
NOTE: When using a three-color policer to rate-limit Layer 2 traffic,
color-aware policing can be applied to egress traffic only.
The policer defines guaranteed traffic rate limits such that traffic that conforms to the
bandwidth limit of 40 Mbps with a 100 KB allowance for traffic bursting (based on the
token-bucket formula) is categorized as green. As with any policed traffic, the packets
in a green flow are implicitly set to a
Nonconforming traffic that falls within the peak traffic limits of a 60 Mbps bandwidth
limit and a 200 KB allowance for traffic bursting (based on the token-bucket formula)
is categorized as yellow. The packets in a yellow traffic flow are implicitly set to a
loss priority and then transmitted.
medium-high
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low loss priority and then transmitted.
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