Cisco 10000 Series User Manual

6-11
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 6 Policing Traffic
Percent-Based Policing
Percent-Based Policing
Percent-based policing enables you to configure traffic policing as a percentage of the bandwidth of the
network interface on which policing is applied. Configuring traffic policing based on bandwidth
percentage enables you to use the same policy map for multiple interfaces with differing amounts of
bandwidth.
Percent-based policing also allows you to specify burst sizes in milliseconds (ms). The router calculates
the burst value in milliseconds based on the policing rate.
When you use a percent-based police command within a nested policy, the police percent is based on
the nearest parent shape rate. If no parent shaping exists, the police percent is based on the link
bandwidth. The router calculates the burst value in milliseconds (ms) based on the policing rate.
Percent-based policing supports two traffic policing rates if the parent policy map has only one class
defined: the class-default class.
The parent policy does only match-any matching when applying the
class-default shaping rate.
Feature History for Percent-Based Policing
police percent Command
To configure traffic policing on the basis of a percentage of bandwidth available on an interface, use the
police percent command in policy-map class configuration mode. To remove traffic policing from the
configuration, use the no form of the command. By default, this command is disabled.
police [cir] percent percent [bc] normal-burst-in-msec [pir pir] [be] excess-burst-in-msec
[conform-action action] [exceed-action action] [violate-action action]
no police [cir] percent percent [bc] normal-burst-in-msec [pir pir]
[be]
excess-burst-in-msec [conform-action action] [exceed-action action] [violate-action
action]
Cisco IOS Release Description Required PRE
Release 12.0(25)SX The percent-based policing feature was introduced on the
router.
PRE1
Release 12.3(7)XI This feature was introduced on the PRE2. PRE2
Release 12.2(28)SB This feature was enhanced on the PRE2 to allow you to
configure two traffic policing rates as a percentage: the
committed information rate (CIR) and the peak information
rate (PIR).
PRE2
Release 12.2(31)SB2 This feature 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. The
set-frde-transmit policing action was also added for the
PRE3.
PRE3

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English