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
