Cisco 10000 Series User Manual

2-3
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 2 Classifying Traffic
Traffic Classification Using Class Maps
PRE3 Class Maps and QoS Scalability
The Cisco 10000 series router with a PRE3 counts QoS matches for each class or for each match. As the
following describes, you can achieve greater scalability with per-class mode counting enabled on the
router:
• Per-match mode (default mode)—The router counts matches for each match statement and class,
and supports 262,144 unique class maps per system.
• Per-class mode—The router counts matches for the entire class and supports 4,194,304 unique class
maps. This mode provides greater scalability.
To configure per-match or per-class QoS match statistics, use the qos match statistics command. For
more information, see the
“qos match statistics Command” section on page 2-4.
Note The qos match statistics command is not available on the PRE2. Due to memory limitations, the PRE2
cannot exceed 262,000 class maps.
When using the show commands in per-class mode, the per-match statistics display a value of zero. In
per-class mode, the per-match statistics are zero in the MIB.
class-map Command
To create or modify a class map, use the class-map command in global configuration mode. To remove
a class map, use the no form of this command. By default, the router uses match-all.
class-map [match-any | match-all] class-map-name
no class-map [match-any | match-all] class-map-name
PRE3 Release 12.2(31)SB2
and later releases
262,144
(per-match mode)
4,194,304
(per-class mode)
16 64
PRE4 Release 12.2(33)SB and
later releases
262,144
(per-match mode)
4,194,304
(per-class mode)
16 64
Table 2-1 System Limits for Class Maps (continued)
Processor Cisco IOS Release
Number of Class
Maps per System
Number of Match
Statements per
Class Map
Number of Classes
per Policy Map

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English