Classifying, Policing, And Marking Traffic By Using Aggregate Policers - Cisco WS-C3550-12G Software Configuration Manual

Chapter 20 Configuring QoS

Classifying, Policing, and Marking Traffic by Using Aggregate Policers

By using an aggregate policer, you can create a policer that is shared by multiple traffic classes within
the same policy map. However, you cannot use the aggregate policer across different policy maps or
interfaces.
Beginning in privileged EXEC mode, follow these steps to create an aggregate policer:
Command
Step 1
configure terminal
Step 2 mls qos
Step 3 mls qos aggregate-police
aggregate-policer-name rate-bps
burst-byte exceed-action {drop |
policed-dscp-transmit}
Step 4
class-map class-map-name [match-all |
match-any]
Step 5
policy-map policy-map-name
Step 6
class class-map-name [access-group
acl-index-or-name | dscp dscp-list |
precedence ip-precedence-list]
Step 7
police aggregate aggregate-policer-name
Step 8 exit
78-11194-03
Purpose
Enter global configuration mode.
Enable QoS on the switch.
Define the policer parameters that can be applied to multiple traffic
classes within the same policy map.
By default, no aggregate policer is defined.
You can configure up to 128 policers on ingress Gigabit-capable
Ethernet ports, up to 8 policers on ingress 10/100 Ethernet ports, and
up to 8 policers on egress ports.
For aggregate-policer-name, specify the name of the aggregate
•
policer.
For rate-bps, specify average traffic rate in bits per second (bps).
•
The range is 8000 to 2000000000.
For burst-byte, specify the normal burst size in bytes. The range is
•
8000 to 512000000.
(Optional) Specify the action to take when the rates are exceeded.
•
Use the exceed-action drop keywords to drop the packet. Use the
exceed-action policed-dscp-transmit keywords to mark down the
DSCP value (by using the policed-DSCP map) and send the packet.
For more information, see the
Map" section on page
Create a class map to classify traffic as necessary. For more
information, see the "Classifying Traffic by Using Class Maps" section
on page 20-30.
Create a policy map by entering the policy map name, and enter
policy-map configuration mode.
For more information, see the
Traffic by Using Policy Maps" section on page
Define a traffic classification, and enter policy-map class configuration
mode.
For more information, see the
Traffic by Using Policy Maps" section on page
Apply an aggregate policer to multiple classes in the same policy map.
For aggregate-policer-name, enter the name specified in Step 3.
Return to global configuration mode.
Catalyst 3550 Multilayer Switch Software Configuration Guide
"Configuring the Policed-DSCP
20-41.
"Classifying, Policing, and Marking
20-32.
"Classifying, Policing, and Marking
20-32.
Configuring QoS
20-37