Policy Framework Configuration Guide - Juniper Networks

Chapter 10: Introduction to Traffic Policing
Table 38: Policer Actions
Policer
Marking
Implicit Action
Configurable Action
Single-rate two-color
Green (conforming)
Assign low loss
priority
None
Red (nonconforming)
None
Assign low or high loss
priority, assign a
forwarding class, or
discard
On some platforms,
you can assign
medium-low or
medium-high loss
priority
Single-rate
three-color
Green (conforming)
Assign low loss
priority
None
Yellow (above the CIR
and CBS)
Assign medium-high
loss priority
None
Red (above the EBS)
Assign high loss
priority
Discard
Two-rate three-color
Green (conforming)
Assign low loss
priority
None
Yellow (above the CIR
and CBS)
Assign medium-high
loss priority
None
Red (above the PIR
and PBS)
Assign high loss
priority
Discard
Order of Policer and Firewall Filter Operations
Input interface policers are evaluated before any input firewall filters. Likewise, output
interface policers are evaluated after any output firewall filters (see Figure 13 on page 279).
Figure 13: Incoming and Outgoing Interface Policers
NOTE: Policers can only be applied to unicast packets. For information on
configuring a filter for flooded traffic, see “Applying Filters to Forwarding
Tables” on page 363.
Copyright © 2010, Juniper Networks, Inc.
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