-
Cisco IOS XE Quality of Service Solutions Configuration Guide, Release 2
-
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
-
Table Of Contents
QoS: CBQoS Management—Policy-to-Interface Mapping Support
Prerequisites for QoS: CBQoS Management—Policy-to-Interface Mapping Support
Restrictions for QoS: CBQoS Management—Policy-to-Interface Mapping Support
Information About QoS: CBQoS Management—Policy-to-Interface Mapping Support
Feature Overview of QoS: CBQoS Management—Policy-to-Interface Mapping Support
Benefits of QoS: CBQoS Management—Policy-to-Interface Mapping Support
How to Configure QoS: CBQoS Management—Policy-to-Interface Mapping Support
Configuration Examples for QoS: CBQoS Management—Policy-to-Interface Mapping Support
Feature Information for QoS: CBQoS Management—Policy-to-Interface Mapping Support
QoS: CBQoS Management—Policy-to-Interface Mapping Support
First Published: December 4, 2006Last Updated: March 2, 2009The QoS: CBQoS Management—Policy-to-Interface Mapping Support feature lets you use Simple Network Management Protocol (SNMP) to find which service policy is applied to a particular interface, without having to search the entire service policy table in the CISCO-CLASS-BASED-QOS-MIB. This feature introduces the CISCO-CBP-TARGET-MIB, which stores these mappings.
Finding Feature Information
For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the "Feature Information for QoS: CBQoS Management—Policy-to-Interface Mapping Support" section.
Use Cisco Feature Navigator to find information about platform support and Cisco IOS XE Software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Contents
•
Prerequisites for QoS: CBQoS Management—Policy-to-Interface Mapping Support
•
•
•
•
•
Prerequisites for QoS: CBQoS Management—Policy-to-Interface Mapping Support
•
•
Restrictions for QoS: CBQoS Management—Policy-to-Interface Mapping Support
•
Information About QoS: CBQoS Management—Policy-to-Interface Mapping Support
To use the QoS: CBQoS Management—Policy-to-Interface Mapping Support feature, you should understand the following concepts:
•
•
Feature Overview of QoS: CBQoS Management—Policy-to-Interface Mapping Support
To find the QoS service policies that are applied to a specific interface (more generically referred to as a target), you must search the entire cbQosServicePolicyTable within the CISCO-CLASS-BASED-QOS-MIB. This process can be very time consuming in large scale configurations, and therefore, is not feasible.
A solution was to create the CISCO-CBP-TARGET-MIB, a more generic MIB that allows any type of target to be mapped to the service policies that are applied to it.
The CISCO-CBP-TARGET-MIB maps policy targets to their corresponding attached service policies by providing a link to the policy instance (service policy) and the policy-map configuration data by using row pointers to the tables that manage each one. For policy types in the CISCO-CLASS-BASED-QOS-MIB, the CISCO-CBP-TARGET-MIB maps targets to their cbQosServicePolicyTable and cbQosPolicyMapCfgTable rows, respectively.
Figure 1 shows the relationship between the CISCO-CBP-TARGET-MIB and the CISCO-CLASS-BASED-QOS-MIB.
Figure 1 Relationship Between the CISCO-CBP-TARGET-MIB and the CISCO-CLASS-BASED-QOS-MIB
CISCO-CBP-TARGET-MIB Objects and Descriptions
The CISCO-CBP-TARGET-MIB consists of the ccbptTargetTable, which describes the class-based policy attachments to specific targets.
Table 1 lists the CISCO-CBP-TARGET-MIB objects and their descriptions.
Decoding Index Values
The CISCO-CBP-TARGET-MIB contains objects that define textual conventions for representing targets that have class-based policy mappings. A target can be any logical interface or entity to which a class-based policy can be applied.
The ccbptTarget is a series of octets that should be interpreted according to the value of ccbptTargetType.
Figure 2 shows a sample index with the type genIf(1) and how to decode index values corresponding to configuration mapping data output.
Figure 2 Sample Index with Mapping Data Output
Figure 2 shows the mapping of the index portion of the object identifier (OID) for an instance of the ccbptPolicyMap object. Each portion of the index is defined as follows:
Configuration Policy Mapping Data-------------------------------ccbptPolicyMap.1.4.0.0.6.97.3.1.3001 = cbQosPolicyMapName.1293Where from left to right:
•
•
•
Numerical Value for the ifIndex Example
Figure 3 shows the numerical value of the ifIndex ccbptTargetId, 0.0.6.97.
Figure 3 Numerical Value for an ifIndex
•
•
•
•
Possible Values for ccbptTargetId
Figure 4 shows the supported ccbptTargetId values.
Figure 4 ccbptTargetId Values
•
•
•
•
Objects in the CISCO-CBP-TARGET-MIB
The notation used in the CISCO-CBP-TARGET-MIB follows the conventions defined in Abstract System Notation One (ASN.1). ASN.1 defines an Open System Interconnection (OSI) language used to describe data types independently from particular computer structures and presentation techniques. Each object in the MIB incorporates a DESCRIPTION field that includes an explanation of the object's meaning and usage, which, together with the other characteristics of the object (SYNTAX, MAX-ACCESS, and INDEX), provides sufficient information for management application development, as well as for documentation and testing.
A network administrator can access the entries (objects) in the CISCO-CBP-TARGET-MIB by means of any SNMP-based network management system (NMS). The network administrator can retrieve information in the CISCO-CBP-TARGET-MIB using standard SNMP get and getnext operations.
Scalar Objects in the CISCO-CBP-TARGET-MIB
The CISCO-CBP-TARGET-MIB contains the following unsupported scalar object:
•
The CISCO-CBP-TARGET-MIB contains the following supported scalar object:
•
Notifications in the CISCO-CBP-TARGET-MIB
There are no notifications in the CISCO-CBP-TARGET-MIB.
Benefits of QoS: CBQoS Management—Policy-to-Interface Mapping Support
Simplifies QoS-to-Service-Policy Mapping
In deployments where service policies are applied to several thousand interfaces, obtaining QoS statistics and configuration information on a per interface or target basis is difficult using the organization of the CISCO-CLASS-BASED-QOS-MIB. You must perform a linear search of the cbQosServicePolicyTable within the MIB to find the corresponding cbQosPolicyIndex and then search for the configuration and statistics for the service policy applied to the interface (target).
The CISCO-CBP-TARGET-MIB offers a direct mapping from the target to the service policy applied to the target and provides the configuration information for that same service policy.
How to Configure QoS: CBQoS Management—Policy-to-Interface Mapping Support
There is no special way to configure this feature. For information on SNMP and QoS configuration tasks, see the "Configuring SNMP Support" module, the Cisco IOS Network Management Command Reference, and the Cisco IOS Quality of Service Solutions Command Reference, respectively.
Configuration Examples for QoS: CBQoS Management—Policy-to-Interface Mapping Support
There is no explicit way to configure the CISCO-CBP-TARGET-MIB. For SNMP and QoS examples, see the "Configuring SNMP Support" module, the Cisco IOS Network Management Command Reference, and the Cisco IOS Quality of Service Solutions Command Reference.
Additional References
The following sections provide references related to the QoS: CBQoS Management—Policy-to-Interface Mapping Support feature.
Related Documents
QoS commands: complete command syntax, command modes, command history, defaults, usage guidelines, and examples
QoS features
SNMP commands: complete command syntax, command modes, command history, defaults, usage guidelines, and examples
SNMP configuration tasks
"Configuring SNMP Support" module
Other documentation
For information on using SNMP MIB features, see the appropriate documentation for your network management system.
Standards
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.
—
MIBs
RFCs
Technical Assistance
Feature Information for QoS: CBQoS Management—Policy-to-Interface Mapping Support
Table 2 lists the release history for this feature.
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS XE Software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Note
Glossary
MIB—Management Information Base. A database of network management information that is used and maintained by a network management protocol such as Simple Network Management Protocol (SNMP). The value of a MIB object can be changed or retrieved by using SNMP commands, usually through a network management system. MIB objects are organized in a tree structure that includes public (standard) and private (proprietary) branches.
OID—object identifier. Values are defined in specific MIB modules.
policy map—Any defined rule that determines the use of resources within the network. A QoS policy map identifies the traffic class to which it applies and the instructions for one or more actions to take on that traffic.
QoS—quality of service. A measure of performance for a transmission system that reflects its transmission quality and service availability. Quality of service focuses on achieving appropriate network performance for networked applications; it is superior to best-effort performance.
SNMP—Simple Network Management Protocol. A management protocol used almost exclusively in TCP/IP networks. SNMP provides a means for monitoring and controlling network devices and for managing configurations, statistics collection, performance, and security.
CCDE, 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.
All other trademarks mentioned in this document or website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0812R)
Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.
© 2006-2009 Cisco Systems, Inc. All rights reserved.
