Per-Session QoS

First Published: March 20, 2006
Last Updated: March 22, 2011

The Per-Session QoS feature is one of two features bundled with the QoS: Broadband Aggregation Enhancements—Phase 1 feature. The Per-Session QoS feature provides the ability to apply quality of service (QoS) features (such as traffic classification, shaping, queueing, and policing) on a per-session basis. The Per-Session QoS feature can be configured either using a RADIUS server or using the framework available on the Intelligent Service Gateway (ISG).

Note The Per-Session QoS feature can also be configured using a virtual template (for PPP sessions only). Using a virtual template is considered a "legacy" method but is still an available option for those familiar with virtual templates. For more information about using virtual templates to configure this feature, see the "Per-Session QoS and Virtual Templates" section.

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Contents

•Prerequisites for Per-Session QoS

•Restrictions for Per-Session QoS

•Information About Per-Session QoS

•How to Configure Per-Session QoS

•Configuration Examples for Per-Session QoS

•Additional References

•Command Reference

•Feature Information for Per-Session QoS

Prerequisites for Per-Session QoS

•The PPP or IP sessions are enabled.

Note This document uses the generic term PPP to cover all protocol types. Examples of protocols include PPP over Ethernet (PPPoE) and PPP over ATM (PPPoA). The specific protocol supported varies by platform. For example, the Cisco 7600 series router does not support PPPoA or PPP over Ethernet over ATM (PPPoEoA). For information about the Cisco 7600 series router, see the Cisco 7600 Series Cisco IOS Configuration Guide for the Cisco IOS release you are using.

•Layer 2 Tunneling Protocol (L2TP) resequencing is disabled.

Note This prerequisite does not apply to the Cisco 7600 series router. L2TP is not supported on the Cisco 7600 series router.

•Traffic classes and policy maps have been configured with the QoS feature (for example, traffic policing or traffic shaping) to be applied to the network traffic. Depending on the needs of your network, multiple traffic classes and policy maps may be required.

Only if you are using a RADIUS server the following prerequisites apply:

•Authentication, authorization, and accounting (AAA) must be enabled.

•The RADIUS server must be configured.

•The service profile on the RADIUS server must be created.

Restrictions for Per-Session QoS

This feature does not support the following:

•L2TP sequencing.

•Packet dropping (packet discarding). That is, this feature does not allow you to discard packets using the drop command.

•The Multilink PPP (MLPPP) protocol. That is, multilink bundles are not supported in either a PPP Termination and Aggregation (PTA) configuration or an L2TP configuration.

Note MLPPP is supported on the Cisco 7600 series router.

•ATM interfaces (that is, PPPoA sessions) for Cisco IOS Release 12.2(33)SRC.

Restrictions for Per-Session QoS (Cisco 7600 Series Routers)

The following restrictions apply to the Cisco 7600 series router only.

•Queueing features are not supported in the ingress (incoming) direction of a router in an IP session. This means that traffic shaping, priority queueing such as low latency queueing (LLQ), class-based weighted fair queueing (CBWFQ), and weighted random early detection (WRED) are not supported. Features that can be configured are traffic policing and traffic marking in either the class-default class or any of the user-defined classes, as shown in the following example: 


 policy-map sess_ingress

  class c1

   police 2000000

   set ip precedence 4

  class class-default

   police 5000000

   set ip precedence 1

Note This restriction does not apply at the subinterface level in the ingress direction. That is, LLQ and traffic shaping are supported in the ingress direction. CBWFQ and WRED are not supported. For more information, see the "IP Subscriber Awareness over Ethernet module.

•A policy map (in the egress direction) used in an IP session can have only packet marking enabled in the user-defined class. No other QoS features (for instance, traffic policing, LLQ, WRED, or traffic shaping) can be enabled. This means that the simplified configuration shown below would not be supported. 

policy-map sess_egress

 class c1

  police/priority/bandwidth/wred/shape

The simplified configuration shown below would be supported. 

policy-map sess_egress

 class c1

  set <name> <value>

However, all QoS features can be configured in the class-default class, as illustrated below. 

policy-map sess_egress

 class class-default

  police/priority/bandwidth/wred/shape/set

•A hierarchical policy map (in the egress direction) on a IP session is supported, but the child policy map must be attached to the class class-default of the parent policy map as illustrated in the simplified configuration below. 

policy-map sess_egress

 class class-default

  <Queueing feature like traffic shaping or bandwidth remaining ratio>

  service-policy child

Note None of the restrictions that apply to a "flat" policy map (that is, a policy map not in a hierarchical policy map structure) in the egress or outgoing direction on a session apply to the child policy map. A simplified configuration illustrating this point is shown below. 


 policy-map child

  class voip

   police 9000

   priority level 1

  class iptv

   police 4193000

   priority level 2

   set cos 4

  class gaming

   bandwidth 1000 (kbps)

  class class-default

   set cos 1

Traffic in both the ingress and egress direction can be classified (matched) on the basis of characteristics or attributes such as the following:

•Ip precedence value

•Differentiated services code point (DSCP) value

•Class of service (CoS) value and CoS-inner value (of a Layer 2 QinQ packet)

•Access control list (ACL) number

•VLAN and inner-VLAN numbers

Combinations of these characteristics or attributes are allowed with the following restrictions:

•A combination of the CoS-inner setting and ACL number is not supported.

•While the command-line interface (CLI) does allow a configuration that contains two match cos commands, the match-any keyword must be used with the class-map command to make such a configuration meaningful.

•The match vlan and match vlan-inner commands are supported at the main interface level only.

Traffic in both the ingress and egress direction can be marked on the basis of characteristics or attributes such as the following:

•Ip precedence value

•DSCP value

•CoS value

•CoS-inner value (in the egress direction only)

If a set command is specified, note the following points:

•Specifying both set cos 4 and set cos 5 in the same traffic class causes the show policy-map command to display only set cos 5 in the show command output.

•Specifying both the set ip prec 5 command and the set dscp cs6 command in the same class causes the show policy-map command to display only set dscp cs6 in the show command output.

Information About Per-Session QoS

Benefits of Per-Session QoS

The ability to apply QoS features on a per-session basis helps the Internet service provider (ISP) to adhere to the Service Level Agreement (SLA) established for handling traffic. Applying QoS on a per-session basis provides a higher degree of granularity for managing traffic on the network.

Policy Maps and QoS Features

A policy map specifies the QoS feature to be applied to network traffic. Examples of QoS features that can be specified in a policy map include traffic classification, shaping, queueing, and policing, among others. Each QoS feature is configured using the appropriate QoS commands.

Hierarchical Policy Maps

Policy maps can be configured in a hierarchical structure. That is, policy maps can be configured in levels subordinate to one another. The policy map at the highest level is referred to as the "parent" policy map. A subordinate policy map is referred to as a "child" policy map.

A typical hierarchical policy map structure consists of a parent policy map and one child policy map. Configure the child policy map first; then configure the parent policy map. Both types of policy maps are configured in the same manner.

The parent policy map typically contains one class—the class called class-default. The child policy map can contain multiple classes.

Note Before configuring the policy map, create the traffic classes and specify the match criteria used to classify traffic. To create traffic classes and specify match criteria, use the MQC.

The following restrictions apply to hierarchical policy maps:

•Specify CBWFQ in the child policy map only. CBWFQ cannot be specified in the parent policy map.

•Traffic shaping can be specified in either the parent policy map or the child policy map.

However, for this feature, you must specify traffic shaping in the parent policy map. Specifying traffic shaping in the child policy map is optional.

Note The restrictions related to policy maps and the Cisco 7600 series router are different from those listed above. For more information about the restrictions specific to the Cisco 7600 series router, see the "Restrictions for Per-Session QoS (Cisco 7600 Series Routers)" section.

Per-Session QoS and Virtual Templates

As mentioned earlier, you can configure the Per-Session QoS feature using a virtual template.

Note Using virtual templates to configure the Per-Session QoS feature applies to PPP sessions only.

A virtual template is a logical interface that is configured with generic configuration information for a specific purpose or with configuration information common to specific users, plus router-dependent information. The template takes the form of a list of Cisco IOS interface commands that are applied to virtual access interfaces, as needed.

A virtual template is configured (defined) on an interface. When a session is enabled (that is, when a packet arrives at the interface), the virtual template inherits the QoS features specified in the policy map for use during the session.

After configuring the policy maps (as many as needed) and associating the policy maps with the virtual template on the interface, you may want to verify the configuration. To verify the per-session QoS configuration, use the show policy-map session [uid uid-number] command. This command allows you to see whether the policy maps are configured the way that you intended.

Per-Session QoS and the ISG Framework

QoS features can be applied on a per-session basis using the ISG framework in a number of ways, including the following:

•Enabling the QoS feature when it is triggered by specific events configured in the ISG policy map (for instance, at the start of a session or at a predetermined expiration interval).

•Using the Change of Authorization (CoA).

•Using the Transparent Auto Logon (TAL).

•Downloading the service profile at the time of authentication.

Cisco AV Pairs and VSAs

Cisco AV pairs are part of vendor-specific attributes (VSAs) that allow a policy map to be applied to the router. Cisco AV pairs are a combination of an attribute and a value. The purpose of the Cisco VSA (attribute 26) is to communicate vendor-specific information between the router and the RADIUS server. The Cisco VSA encapsulates vendor-specific attributes that allow vendors such as Cisco to support their own extended attributes.

For this configuration, one of two Cisco AV pairs can be used (formatted as shown below):

•lcp:interface-config=service-policy output/input <policy name>

This Cisco AV pair is considered a "legacy" AV pair. It is of earlier origin but is still an available choice.

•ip:sub-qos-policy-in/out=<policy name>

This Cisco AV pair takes advantage of more recent technology and is the recommended choice. This Cisco AV pair is the one shown in the configuration task and example.

The Cisco AV pair is added to the service profile on the RADIUS server. Each entry establishes an attribute that the user can access.

In a user file, the data to the left of the equal sign (=) is an attribute defined in the dictionary file, and the data to the right of the equal sign is the configuration data.

The Cisco AV pair identifies the policy map that was used to configure the specific QoS features. When the router requests the policy map name (specified in the Cisco AV pair), the policy map is pulled to the router from the RADIUS server when the session is established. The Cisco AV pair applies the appropriate policy map (and, therefore, the QoS feature) directly to the router from the RADIUS server.

How to Configure Per-Session QoS

The tasks for configuring per-session QoS vary according to the configuration method that you are using. You can choose to configure the feature either using a RADIUS server or using the ISG framework.

Choose one of the following:

•To configure the feature using a RADIUS server, see the "Configuring Per-Session QoS Using a RADIUS Server" section.

•To configure per-session QoS using the ISG framework, see the "Configuring Per-Session QoS Using the ISG Framework" section.

Note For information about configuring the feature using a virtual template, see the "Per-Session QoS and Virtual Templates" section.

Configuring Per-Session QoS Using a RADIUS Server

Adding the Cisco QoS AV Pairs to the Service Profile on the RADIUS Server

Prerequisites

Before adding the Cisco QoS AV pairs to the service profile, you must create traffic classes and configure policy maps used to enable the QoS feature you want to use.

SUMMARY STEPS

1. ip:sub-qos-policy-in/out=<policy name>

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

ip:sub-qos-policy-in/out=<policy name>


Example:

cisco-avpair="ip:sub-qos-policy-in=res_ingress"

cisco-avpair="ip:sub-qos-policy-out=res_hsi_voip_
parent1"


Enter the Cisco QoS AV pair for policy maps on the RADIUS server in the service profile. When the router requests the service definition from the RADIUS server, the information in the service profile is used.

•Add the Cisco QoS AV pairs to the service profile.

Defining an ISG Policy Map to Start the QoS Service on the RADIUS Server

SUMMARY STEPS

1. enable

2. configure terminal

3. policy-map type control policy-map-name

4. class type control always event session-start

5. action-number service-policy type service name service-name

6. end

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

policy-map type control policy-map-name

Example:

Router(config)# policy-map type control TEST

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.

•Enter the type and control keywords and the name of the policy map.

Note Using the control keyword enters control policy-map configuration mode.

Step 4 

class type control always event session-start

Example:

Router(config-control-policymap)# class type control always event session-start

Specifies a control class (or event) for which actions may be configured in policy map. Enters control policy-map class control configuration mode.

Step 5 

action-number service-policy type service name service-name

Example:

Router(config-control-policymap-class-control)# 1 service-policy type service name QoS_Service

Applies the specified service at the start of the session.

•Enter the action number, the name keyword, and the name of the service.

Step 6 

end

Example:

Router(config-control-policymap-class-control)# end

(Optional) Returns to privileged EXEC mode.

Reviewing Session Statistics and Verifying the Policy Map Configuration

SUMMARY STEPS

1. enable

2. show subscriber session uid uid-number

3. show policy-map session uid uid-number

4. exit

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

show subscriber session uid uid-number

Example: 
Router# show subscriber session uid 401

Displays information about subscriber sessions on an ISG by the unique ID.

•Enter the uid keyword and unique identifier.

Step 3 

show policy-map session uid uid-number

Example: 
Router# show policy-map session uid 401

Displays the information about the session identified by the unique ID.

•Enter the uid keyword and unique identifier.

Step 4 

exit

Example:

Router# exit

(Optional) Exits privileged EXEC mode.

What to Do Next

Proceed to the "Configuration Examples for Per-Session QoS" section.

Configuring Per-Session QoS Using the ISG Framework

Configuring a Local Service Profile

Prerequisites

Before configuring the local service profile, you must create traffic classes and configure policy maps used to enable the QoS feature that you want to use. To create traffic classes and policy maps, use the MQC.

SUMMARY STEPS

1. enable

2. configure terminal

3. policy-map type service policy-map-name

4. service-policy input policy-map-name

5. service-policy output policy-map-name

6. exit

7. aaa authorization subscriber-service default local group name

8. end

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

policy-map type service policy-map-name

Example:

Router(config)# policy-map type service QoS_Service

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.

•Enter the type and service keywords and the name of the policy map.

Note Using the service keyword enters service policy-map configuration mode.

Step 4 

service-policy input policy-map-name

Example:

Router(config-service-policymap)# service-policy input res_ingress

Attaches the specified policy map to the input interface or input VC.

•Enter the name of the policy map.

Step 5 

service-policy output policy-map-name

Example:

Router(config-service-policymap)# service-policy output res_hsi_voip_iptv_parent1

Attaches the specified policy map to the output interface or output VC.

•Enter the name of the policy map.

Step 6 

exit

Example:

Router(config-service-policymap)# exit

Returns to global configuration mode.

Step 7 

aaa authorization subscriber-service default local group name

Example:

Router(config)# aaa authorization subscriber-service default local group group1

Specifies one or more authentication, authorization, and accounting (AAA) authorization methods for ISG to use in providing subscriber service.

•Enter the default keyword, the local keyword, the group keyword, and the group name.

Note The local keyword must be entered after the default keyword.

Step 8 

end

Example:

Router(config)# end

(Optional) Returns to privileged EXEC mode.

Defining an ISG Policy Map to Start the QoS Service

SUMMARY STEPS

1. enable

2. configure terminal

3. policy-map type control policy-map-name

4. class type control always event session-start

5. action-number service-policy type service name service-name

6. end

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

policy-map type control policy-map-name

Example:

Router(config)# policy-map type control TEST

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.

•Enter the type and control keywords and the name of the policy map.

Note Using the control keyword enters control policy-map configuration mode.

Step 4 

class type control always event session-start

Example:

Router(config-control-policymap)# class type control always event session-start

Specifies a control class (or event) for which actions may be configured in an ISG control policy. Enters control policy-map class control configuration mode.

Step 5 

action-number service-policy type service name service-name

Example:

Router(config-control-policymap-class-control)# 1 service-policy type service name QoS_Service

Activates an ISG service.

•Enter the action number, the name keyword, and the name of the service.

Step 6 

end

Example:

Router(config-control-policymap-class-control)# end

(Optional) Returns to privileged EXEC mode.

Starting the Session and Verifying the Policy Map Configuration

SUMMARY STEPS

1. enable

2. show subscriber session uid uid-number

3. show policy-map session uid uid-number

4. exit

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

show subscriber session uid uid-number

Example: 
Router# show subscriber session uid 401

(Optional) Displays information about subscriber sessions on an ISG by the unique ID.

•Enter the uid keyword and unique identifier.

Step 3 

show policy-map session uid uid-number

Example: 
Router# show policy-map session uid 401

(Optional) Displays information about the session identified by the unique ID.

•Enter the uid keyword and unique identifier.

Step 4 

exit

Example:

Router# exit

(Optional) Exits privileged EXEC mode.

Configuration Examples for Per-Session QoS

Example: Adding the Cisco QoS AV Pairs to the Service Profile on the RADIUS Server

The following is an example of a service profile in which the Cisco QoS AV pairs have been added. Cisco AV pairs are needed only if you are configuring the Per-Session QoS feature using a RADIUS server. 

cisco-avpair = "ip:sub-qos-policy-in=res_ingress"

cisco-avpair = "ip:sub-qos-policy-out=res_hsi_voip_iptv_parent1"

Example: Configuring a Local Service Profile

The following is an example of a local service profile configuration. Configuring a local service profile is needed only if you are configuring the Per-Session QoS feature using the ISG framework.

Router> enable

Router# configure terminal

Router(config)# policy-map type service QoS_Service

Router(config-service-policymap)# service-policy input res_ingress

Router(config-service-policymap)# service-policy output res_hsi_voip_iptv_parent1

Router(config-service-policymap)# exit

Router(config)# aaa authorization subscriber-service default local group group1

Router(config)# end


Example: Defining an ISG Policy Map to Start the QoS Service

The following is an example an ISG policy map configured to initiate the QoS service at the start of a session.

Router> enable 

Router# configure terminal

Router(config)# policy-map type control TEST

Router(config-control-policymap)# class type control always event session-start

Router(config-control-policymap-class-control)# 1 service-policy type service name 
QoS_Service

Router(config-control-policymap-class-control)# end

Examples: Verifying the Per-Session QoS Configuration

The following is an example of the output of the show subscriber session command. 

Router# show subscriber session uid 2


Unique Session ID: 2

Identifier: 

SIP subscriber access type(s): IP

Current SIP options: Req Fwding/Req Fwded

Session Up-time: 00:00:20, Last Changed: 00:00:20

 

Policy information:

  Authentication status: unauthen

  Active services associated with session:

    name "QoS_Service", applied before account logon

  Rules, actions and conditions executed:

    subscriber rule-map TEST

      condition always event session-start

        1 service-policy type service name QoS_Service

 

Session inbound features:

 Feature: QoS Policy Map

  Input Policy Map: res_ingress

 

Session outbound features:

 Feature: QoS Policy Map

  Output Policy Map: res_hsi_voip_iptv_parent1

 

Configuration sources associated with this session:

Service: QoS_Service, Active Time = 00:00:22

Interface: GigabitEthernet3/1/3.100, Active Time = 00:00:22

The following is an example of the output of the show policy-map session command. 

Router# show policy-map session uid 2

 

 SSS session identifier 2 -

 

  Service-policy input: res_ingress

 

  Counters last updated 00:00:00 ago

 

    Class-map: voip (match-all)

      126126 packets, 9585576 bytes

      30 second offered rate 1114000 bps, drop rate 1114000 bps

      Match: ip precedence 5 

      police:

          cir 9000 bps, bc 1500 bytes

        conformed 40 packets, 3040 bytes; actions:

          transmit

        exceeded 126086 packets, 9582536 bytes; actions:

          drop

        conformed 0 bps, exceed 1114000 bps

      QoS Set

        cos 5

          Packets marked 126126

 

    Class-map: class-default (match-any)

          

      262772 packets, 133488176 bytes

      30 second offered rate 15550000 bps, drop rate 15502000 bps

      Match: any 

      police:

          cir 2000000 bps, bc 62500 bytes

        conformed 784 packets, 398272 bytes; actions:

          transmit

        exceeded 261988 packets, 133089904 bytes; actions:

          drop

        conformed 44000 bps, exceed 15502000 bps

      QoS Set

        cos 1

          Packets marked 262772

 SSS session identifier 2 -

 

  Service-policy output: res_hsi_voip_iptv_parent1

 

    Class-map: class-default (match-any)

      0 packets, 0 bytes

      30 second offered rate 0 bps, drop rate 0 bps

      Match: any 

      Queueing

      queue limit 2000 packets

      (queue depth/total drops/no-buffer drops) 0/0/0

      (pkts output/bytes output) 0/0

      bandwidth remaining ratio 5 

      bandwidth remaining 0%

      shape (average) cir 8000000, bc 32000, be 32000

      target shape rate 8000000

 

      Service-policy : hsi_voip_iptv

 

        queue stats for all priority classes:

          

          priority level 1

          

          queue limit 2 packets

          (queue depth/total drops/no-buffer drops) 0/0/0

          (pkts output/bytes output) 0/0

 

        queue stats for all priority classes:

          

          priority level 2

          queue limit 1048 packets

          (queue depth/total drops/no-buffer drops) 0/0/0

          (pkts output/bytes output) 0/0

 

        Class-map: voip (match-all)

          0 packets, 0 bytes

          30 second offered rate 0 bps, drop rate 0 bps

          Match: ip precedence 5 

          Priority: Strict, b/w exceed drops: 0

          

          Priority Level: 1 

          police:

              cir 9000 bps, bc 1500 bytes

            conformed 0 packets, 0 bytes; actions:

              transmit

          

            exceeded 0 packets, 0 bytes; actions:

              drop

            conformed 0 bps, exceed 0 bps

          QoS Set

            cos 5

              Packets marked 0

 

        Class-map: iptv (match-all)

          0 packets, 0 bytes

          30 second offered rate 0 bps, drop rate 0 bps

          Match: ip precedence 6 

          Priority: Strict, b/w exceed drops: 0

          

          Priority Level: 2 

          police:

              cir 4193000 bps, bc 131031 bytes

            conformed 0 packets, 0 bytes; actions:

              transmit

            exceeded 0 packets, 0 bytes; actions:

              drop

            conformed 0 bps, exceed 0 bps

          QoS Set

          

            cos 4

              Packets marked 0

 

        Class-map: class-default (match-any)

          0 packets, 0 bytes

          30 second offered rate 0 bps, drop rate 0 bps

          Match: any 

          

          queue limit 949 packets

          (queue depth/total drops/no-buffer drops) 0/0/0

          (pkts output/bytes output) 0/0

          QoS Set

            cos 1

              Packets marked 0

Additional References

The following sections provide references related to the Per-Session QoS feature.

Related Documents

Related Topic
Document Title

QoS commands: complete command syntax, command modes, command history, defaults, usage guidelines, and examples

Cisco IOS Quality of Service Solutions Command Reference

QoS features such as traffic classification and traffic policing

"Quality of Service Overview" module

Class maps, policy maps, hierarchical policy maps, and MQC

"Applying QoS Features Using the MQC" module

RADIUS servers and AAA

"Configuring Authentication" module

RADIUS accounting

"Configuring Accounting" module

ISG policies and session maintenance

"Configuring ISG Policies for Session Maintenance" module

Classification, policing, and marking on Layer 2 Tunneling Protocol (L2TP) access concentrator (LAC)

"QoS: Classification, Policing, and Marking on LAC" module

LLQ, traffic shaping, CBWFQ, and WRED support on a 7600 series router

"IP Subscriber Awareness over Ethernet" module


Standards

Standard
Title

No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

—


MIBs

MIB
MIBs Link

No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs


RFCs

RFC
Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

—


Technical Assistance

Description
Link

The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

http://www.cisco.com/cisco/web/support/index.html


Command Reference

This feature uses no new or modified commands.

Feature Information for Per-Session QoS

Table 1 lists the release history for this feature.

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Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

Table 1 Feature Information for Per-Session QoS

Feature Name
Releases
Feature Information

Per-Session QoS

12.2(28)SB
12.2(33)SRC

The Per-Session QoS feature provides the ability to apply quality of service (QoS) features (such as traffic classification, shaping, queueing, and policing) on a per-session basis.

In Release 12.2(28)SB, this feature was introduced on the Cisco 7200 series router.

In Release 12.2(33)SRC, support was added for the Cisco 7600 series router.


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