How To Implement Policing - Cisco Catalyst 4500 Series Configuration Manual

Chapter 40 Configuring Quality of Service
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These policers are partitioned between Input and Output in chunks of 2K policer banks. The different
types of policers can all co-exist in the system. However, a given type of policer (srTCM, trTCM etc.) is
configurable as a block of 128 policers.
Two policers are reserved for internal use.
Note

How to Implement Policing

For details on how to implement the policing features on a Catalyst 4500 Series Switch, refer to the
Cisco IOS documentation at the following link:
http://www.cisco.com/en/US/docs/ios/12_2/qos/configuration/guide/qcfpolsh.html
Platform Restrictions
Platform restrictions include the following:
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Marking Network Traffic
Marking network traffic allows you to set or modify the attributes of traffic (that is, packets) belonging
to a specific class or category. When used in conjunction with network traffic classification, marking
network traffic is the foundation for enabling many quality of service (QoS) features on your network
This module contains conceptual information and the configuration tasks for marking network traffic.
Contents
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OL-25340-01
16K Single Rate Policer with Single Burst (Two Color Marker)
8K Single Rate Three Color Marker (srTCM)
8K Two Rate Three Color Marker (trTCM)
Multi-policer actions can be specified (setting CoS and IP DSCP is supported).
When unconditional marking and policer based marking exists on the same field(cos or dscp or
precedence), policer-based marking is preferred.
If policer based service-policy is attached to both a port and a VLAN, port-based policed is preferred
by default. To over-ride a specific VLAN policy on a given port, then you must configure a per-port
per-vlan policy.
You should not delete a port-channel with a per-port, per-VLAN QoS policy.
Workaround: Before deleting the port-channel, do the following:
1. Remove any per-port per-VLAN QoS policies, if any.
2. Remove the VLAN configuration on the port-channel with the no vlan-range command.
"Information About Marking Network Traffic" section on page 40-18
"Marking Action Drivers" section on page 40-20
"Traffic Marking Procedure Flowchart" section on page 40-20
"Restrictions for Marking Network Traffic" section on page 40-21
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
Configuring QoS
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