Cisco 10000 Series User Manual

6-10
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 6 Policing Traffic
Two-Rate Three-Color Marker for Traffic Policing
See Table 6-1 on page 6-3 for a description of each action you can specify.
For information about conforming, exceeding, and violating traffic, see the “Usage Guidelines for the
police Command” section on page 6-7.
police Command History
Usage Guidelines for the police Command
When the be value equals 0, we recommend that you set the egress bc value to be greater than or equal
to the ingress bc value plus 1. Otherwise, packet loss can occur. For example:
be = 0
egress bc >= ingress bc + 1
pir pir Peak information rate (PIR). Indicates the rate at which the second token
bucket is updated. The pir specifies the PIR value in bits per second. Valid
values are from 8000 to 2,488,320,000.
be peak-burst (Optional) Specifies the peak burst (be) size used by the second token
bucket for policing. The peak-burst specifies the be value in bytes. The size
depends on the interface used. Valid values are 0 to 1,024,000,000.
Note When the be value equals 0, we recommend that you set the egress
bc value to be greater than or equal to the ingress bc value plus 1.
Otherwise, packet loss can occur. For example:
be = 0
egress bc >= ingress bc + 1
conform-action action (Optional) Specifies the action to take on packets that conform to the rate
limit. The default action is transmit. You must specify burst-excess before
you specify the conform-action.
exceed-action action (Optional) Specifies the action to take on packets that exceed the rate limit,
but not the PIR. The default action is drop. You must specify the
conform-action before you specify the exceed-action.
violate-action action (Optional) Specifies the action to take on packets that continuously exceed
the PIR rate limit. The default action is the same as the exceed-action. You
must specify the exceed-action before you specify the violate-action.
Cisco IOS Release Description
Release 12.2(27)SBB The single-rate police command was enhanced on the PRE2 to allow you to
configure two traffic policing rates: the committed information rate (CIR)
and the peak information rate (PIR).
Release 12.2(31)SB2 This command was introduced on the PRE3 to allow you to police traffic on
the L2TP access concentrator (LAC) based on the value of a packet’s IP
DSCP bits.

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English