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Cisco IOS XE Quality of Service Solutions Configuration Guide, Release 2
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Quality of Service Overview
- Part 1: Classification
- Part 2: Congestion Management
- Part 3: Congestion Avoidance
- Part 4: Policing and Shaping
- Part 5: Link Efficiency Mechanisms
- Part 6: Quality of Service Solutions
- Part 7: Modular Quality of Service Command-Line Interface
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Table Of Contents
Policer Enhancement—Multiple Actions
Related Features and Technologies
Supported Standards, MIBs, and RFCs
Configuring Multiple Policer Actions
Verifying the Multiple Policer Actions Configuration
Monitoring and Maintaining the Multiple Policer Actions
Multiple Actions in a Two-Rate Policer: Example
Verifying the Multiple Policer Actions: Example
Policer Enhancement—Multiple Actions
Feature History
Cisco IOS XE Release 2.1
This feature was introduced on Cisco ASR 1000 Series Routers.
This document describes the Policer Enhancement—Multiple Actions feature and includes the following sections:
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Supported Standards, MIBs, and RFCs
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Feature Overview
This feature further extends the functionality of the Cisco IOS XE single-rate policer and the Two-Rate Policer feature. The Traffic Policing and Two-Rate Policer features are traffic policing mechanisms that allow you to control the maximum rate of traffic sent or received on an interface. Both of these traffic policing mechanisms mark packets as either conforming to, exceeding, or violating a specified rate. After a packet is marked, you can specify an action to be taken on the packet based on that marking.
With both the Traffic Policing feature and the Two-Rate Policer feature, you can specify only one conform action, one exceed action, and one violate action. Now with the new Policer Enhancement—Multiple Actions feature, you can specify multiple conform, exceed, and violate actions for the marked packets.
You specify the multiple actions by using the action argument of the police command. The resulting actions are listed in Table 1.
For more information about the police command, see the Cisco IOS Quality of Service Solutions Command Reference.
For more information about traffic policing, see the "Policing and Shaping Overview" module. For more information about the Two-Rate Policer feature, see the "Two-Rate Policer" module.
Benefits
Before this feature, you could specify only one marking action for a packet, in addition to transmitting the packet. This feature provides enhanced flexibility by allowing you to specify multiple marking actions for a packet, as required. For example, if you know the packet will be transmitted through both a TCP/IP and a Frame Relay environment, you can change the DSCP value of the exceeding or violating packet, and also set the Frame Relay Discard Eligibility (DE) bit from 0 to 1 to indicate lower priority.
Restrictions
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Related Features and Technologies
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Related Documents
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Supported Standards, MIBs, and RFCs
Standards
No new or modified standards are supported by this feature.
MIBs
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To locate and download MIBs for selected platforms, Cisco IOS XE Software releases, and feature sets, use Cisco MIB Locator found at the following URL:
RFCs
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Prerequisites
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Configuration Tasks
See the following sections for configuration tasks for the Police Enhancement—Multiple Actions feature. Each task in the list is identified as either required or optional.
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Configuring Multiple Policer Actions
To configure multiple policer actions, use the following commands beginning in global configuration mode:
Verifying the Multiple Policer Actions Configuration
To verify that the multiple policer actions have been configured on the interface, use the following command in EXEC or privileged EXEC mode:
Router# show policy-map interface
Displays statistics and configurations of all input and output policies attached to an interface.
Troubleshooting Tips
Check the interface type. Verify that this feature is supported on your interface. See the "Restrictions" section.
Monitoring and Maintaining the Multiple Policer Actions
To monitor and maintain the multiple policer actions, use the following EXEC or privileged EXEC mode commands, as needed:
Configuration Examples
This section provides the following configuration examples:
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Multiple Actions in a Two-Rate Policer: Example
In the following example, a policy map called police is configured to use a two-rate policer to police traffic leaving an interface. Two rates, a committed information rate (CIR) of 1 Mbps and a peak information rate (PIR) of 2 Mbps, have been specified.
Router(config)# policy-map policeRouter(config-pmap)# class class-defaultRouter(config-pmap-c)# police cir 1000000 pir 2000000Router(config-pmap-c-police)# conform-action transmitRouter(config-pmap-c-police)# exceed-action set-prec-transmit 4Router(config-pmap-c-police)# exceed-action set-frde-transmitRouter(config-pmap-c-police)# violate-action set-prec-transmit 2Router(config-pmap-c-police)# violate-action set-frde-transmitRouter(config-pmap-c-police)# endThe following actions will be performed on packets associated with the policy map called police:
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Verifying the Multiple Policer Actions: Example
The following sample output of the show policy-map command displays the configuration for a service policy called police. In this service policy, multiple actions for packets marked as exceeding the specified CIR rate have been configured. For those packets, the IP Precedence level is set to 4, the DE bit is set to 1, and the packet is transmitted. Multiple actions for packets marked as violating the specified PIR rate have also been configured. For those packets, the IP Precedence level is set to 2, the DE bit is set to 1, and the packet is transmitted.
Router# show policy-map policePolicy Map policeClass class-defaultpolice cir 1000000 bc 31250 pir 2000000 be 31250conform-action transmitexceed-action set-prec-transmit 4exceed-action set-frde-transmitviolate-action set-prec-transmit 2violate-action set-frde-transmitCCDE, CCENT, Cisco Eos, Cisco HealthPresence, the Cisco logo, Cisco Lumin, Cisco Nexus, Cisco StadiumVision, Cisco TelePresence, Cisco WebEx, DCE, and Welcome to the Human Network are trademarks; Changing the Way We Work, Live, Play, and Learn and Cisco Store are service marks; and Access Registrar, Aironet, AsyncOS, Bringing the Meeting To You, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, CCSP, CCVP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Collaboration Without Limitation, EtherFast, EtherSwitch, Event Center, Fast Step, Follow Me Browsing, FormShare, GigaDrive, HomeLink, Internet Quotient, IOS, iPhone, iQuick Study, IronPort, the IronPort logo, LightStream, Linksys, MediaTone, MeetingPlace, MeetingPlace Chime Sound, MGX, Networkers, Networking Academy, Network Registrar, PCNow, PIX, PowerPanels, ProConnect, ScriptShare, SenderBase, SMARTnet, Spectrum Expert, StackWise, The Fastest Way to Increase Your Internet Quotient, TransPath, WebEx, and the WebEx logo are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries.
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