QoS: Congestion Management Configuration Guide, Cisco IOS XE Release 3S
QoS Hierarchical Queueing for Ethernet DSLAMs
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QoS Hierarchical Queueing for Ethernet DSLAMs

Contents

QoS Hierarchical Queueing for Ethernet DSLAMs

This feature module describes how to configure quality of service (QoS) hierarchical queueing policy maps on sessions and subinterfaces in Ethernet Digital Subscriber Line Access Multiplexer (E-DSLAM) applications on a Cisco ASR 1000 series router. The QoS Hierarchical Queueing for Ethernet DSLAMs feature supports IEEE 802.1 QinQ VLAN tag termination to configure inner VLAN identifiers on E-DSLAMs.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and 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 table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Prerequisites for QoS Hierarchical Queueing for Ethernet DSLAMs

You must configure traffic classes using the class-map command.

Restrictions for QoS Hierarchical Queueing for Ethernet DSLAMs

This feature is not supported in combination with load balancing when a session service policy is routed to a Layer 2 Tunnel Protocol (L2TP) tunnel. Do not configure load balancing on an L2TP tunnel if per-session queueing is enabled.

Information About QoS Hierarchical Queueing for Ethernet DSLAMs

Different Levels of QoS Provisioning

Traffic downstream from a Broadband Router Access Server (BRAS) requires different levels of QoS provisioning (for example, traffic shaping) depending on the network architecture between the BRAS and the subscriber. The figure below illustrates an Ethernet DSL access network. The sample network includes multiple entities where QoS provisioning is required for different reasons.

Figure 1. Ethernet DSL Access Network

The following entities may require different traffic shaping:

  • A VLAN that is shaped to a certain aggregate traffic rate to limit the traffic to a group of subscribers (different 802.1Q interfaces in the figure above).
  • Individual sessions that is shaped with certain QoS services for different classes of traffic (individual PCs in the figure above).

Integrated Queueing Hierarchy

Different traffic shaping requirements result in QoS provisioning at multiple levels at the same time. The QoS-Hierarchical Queueing for Ethernet DSLAMs feature provides the ability to form one integrated queueing hierarchy that provides QoS provisioning at multiple levels with support for features such as bandwidth distribution at any of these levels.

The integrated queueing hierarchy is formed on the physical interface. When a service policy is instantiated on a session, the Subscriber Service Switch (SSS) infrastructure invokes the MQC and a common queueing control plane sets up and enables the queueing features.

Session-to-interface associations are resolved to determine the physical interface on which to form the integrated queueing hierarchy for all levels of QoS provisioning. As subinterface session-based policies are added, the respective queues are created and integrated into the queueing hierarchy.

When a subinterface is provisioned followed by session-based policy provisioning, the integrated queueing hierarchy is formed on top of the physical interface as a result of queueing policies provisioned at two different levels. When a session is provisioned before subinterface-based policy provisioning, the queueing hierarchy has a placeholder logical level between the physical queue and the session queue. The placeholder queue becomes the default queue at that level, and all other sessions are parented to that queue.

Configuration Guidelines for Hierarchical Queueing on Ethernet DSLAMs

When configuring the QoS Hierarchical Queueing for Ethernet DSLAMs feature, note the following guidelines:

  • An individual subscriber is always identified by a PPP or IP session. A group of subscribers is identified by a particular VLAN by means of the outer tag ISP, E-DSLAM, or user-facing provider edge (U-PE).
  • When a subinterface is used to aggregate a number of sessions with queueing policies, a queueing policy at a subinterface level must be a one-level policy map that is configured as class-default with only the shape and bandwidth remaining ratio feature enabled.
  • Both subinterfaces and sessions can be oversubscribed and controlled by shaper and bandwidth remaining ratio.

How to Configure QoS Hierarchical Queueing for Ethernet DSLAMs

Configuring and Applying QoS Hierarchical Queueing Policy Maps to Sessions

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    policy-map policy-map-name

    4.    class class-map-name

    5.    bandwidth {bandwidth-kbps | percentpercentage| remainingpercentpercentage}

    6.    precedence precedence min-threshold max-threshold mark-probability-denominator

    7.    set cos cos-value

    8.    exit

    9.    exit

    10.    policy-map policy-map-name

    11.    class class-default

    12.    shape average cir

    13.    bandwidth remaining ratio ratio

    14.    service-polic ypolicy-map-name

    15.    exit

    16.    exit

    17.    interface virtual-template number

    18.    service-policy output policy-map-name

    19.    end


DETAILED STEPS
     Command or ActionPurpose
    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 policy-map-name


    Example:
    Router(config)# policy-map session_a_child
     

    Creates a child policy and enters policy-map configuration mode.

    • Enter the policy-map name.
     
    Step 4 class class-map-name


    Example:
    Router(config-pmap)# class voip
     

    Configures the traffic class that you specify and enters policy-map class configuration mode.

    • Enter the name of a previously configured class map .
     
    Step 5 bandwidth {bandwidth-kbps | percentpercentage| remainingpercentpercentage}

    Example:
    Router(config-pmap-c)# bandwidth 10000


    Example:
    
     
    		  
     

    (Optional) Enables class-based weighted fair queueing based on the keywords and arguments specified, as described below.

    • bandwidth-kbps--Specifies the minimum bandwidth allocated for a class belonging to a policy map. Valid values are from 8 to 2,488,320, which represents from 1 to 99 percent of the link bandwidth.
    • percent percentage--Specifies the minimum percentage of the link bandwidth allocated for a class belonging to a policy map. Valid values are from 1 to 99.
    • remaining percent percentage--Specifies the minimum percentage of unused link bandwidth allocated for a class belonging to a policy map. Valid values are from 1 to 99.
     
    Step 6 precedence precedence min-threshold max-threshold mark-probability-denominator


    Example:
    Router(config-pmap-c)# precedence 0 32 256 100
     

    (Optional) Configures a precedence level for the traffic class based on the arguments specified, as described below.

    • precedence--Specifies the IP precedence number. Valid values are from 0 to 7.
    • min-threshold--Specifies the minimum threshold in number of packets. Valid values are from 1 to 4096.
    • max-threshold--Specifies the maximum threshold in number of packets. Valid values are from the minimum threshold to 4096.
    • mark-probability-denominator--Specifies the denominator for the fraction of packets dropped when the average queue depth is equal to the maximum threshold. For example, if the denominator is 512, 1 out of every 512 packets is dropped when the average queue is at the maximum threshold. Valid values are from 1 to 65536. The default value is 10 (1 out of every 10 packets is dropped at the maximum threshold).
     
    Step 7 set cos cos-value


    Example:
    Router(config-pmap-c)# set cos 1
     

    (Optional) Sets the Layer 2 class of service (CoS) value of an outgoing packet.

    • Enter the IEEE 802.1Q CoS value from 0 to 7.
    Note   

    Use the set cos command only in service policies that are attached in the output direction of an interface; packets that enter an interface cannot be set with a CoS value. You can configure a CoS value on an Ethernet interface that is configured for 802.1Q or on a virtual access interface that is using an 802.1Q interface.

     
    Step 8 exit


    Example:
    Router(config-pmap-c)# exit
     

    Exits policy-map class configuration mode.

     
    Step 9 exit


    Example:
    Router(config-pmap)# exit
     

    Exits policy-map configuration mode.

     
    Step 10 policy-map policy-map-name


    Example:
    Router(config)# policy-map session_a_parent
     

    Creates a parent policy and enters policy-map configuration mode.

    • Enter the policy-map name.
     
    Step 11 class class-default


    Example:
    Router(config-pmap)# class class-default
     

    Configures the traffic class as class-default and enters policy-map class configuration mode.

    Note   

    Do not configure any other traffic class.

     
    Step 12 shape average cir


    Example:
    Router(config-pmap-c)# shape average 10000000
     

    Specifies average-rate traffic shaping for all traffic that does not match any other traffic class.

    • Enter the average keyword followed by the committed information rate (CIR), in bits per second (bps).
     
    Step 13 bandwidth remaining ratio ratio


    Example:
    Router(config-pmap-c)# bandwidth remaining ratio 10
     

    Specifies the weight (ratio) for the subinterface.

    • Enter the relative weight of this subinterface (or class queue). This number (ratio) indicates the proportional relationship between the other subinterfaces or class queues.
     
    Step 14 service-polic ypolicy-map-name


    Example:
    Router(config-pmap-c)# service-policy session_a_child 
     

    Applies the child policy map to the parent class-default class.

    • Enter the name of a previously configured child policy map.
     
    Step 15 exit


    Example:
    Router(config-pmap-c)# exit
     

    Exits policy-map class configuration mode.

     
    Step 16 exit


    Example:
    Router(config-pmap)# exit
     

    Exits policy-map configuration mode.

     
    Step 17 interface virtual-template number


    Example:
    Router(config)# interface virtual-template 1
     

    Creates a virtual template and enters interface configuration mode.

    • Enter the virtual template number. Valid range is from 1 to 4095.
     
    Step 18 service-policy output policy-map-name


    Example:
    Router(config-if)# service-policy output session_a_parent
     

    Applies the service policy to the virtual interface.

    • Enter the name of the previously configured parent policy map.
    Note   

    You must specify the output keyword to apply the service policy to outbound traffic on the interface.

     
    Step 19 end


    Example:
    Router(config-if)# end
     

    (Optional) Returns to privileged EXEC mode.

     

    Examples

    The following is an example of how to configure and apply a QoS hierarchical queueing policy map to PPP/IP sessions by using a virtual template:

    Router> enable 
    Router# configure terminal 
    Router(config)# policy-map session_a_child 
    Router(config-pmap)# class voip 
    Router(config-pmap-c)# police 1000000 
    Router(config-pmap-c)# priority level 1
    Router(config-pmap-c)# exit
    Router(config-pmap)# class video 
    Router(config-pmap-c)# police 100000 
    Router(config-pmap-c)# priority level 2 
    Router(config-pmap-c)# exit
    Router(config-pmap)# class precedence_0 
    Router(config-pmap-c)# bandwidth remaining ratio 10 
    Router(config-pmap-c)# exit
    Router(config-pmap)# class precedence_1 
    Router(config-pmap-c)# bandwidth remaining ratio 20 
    Router(config-pmap-c)# exit 
    Router(config-pmap)# exit 
    Router(config)# policy-map session_a_parent 
    Router(config-pmap-c)# exit
    Router(config-pmap)# class class-default 
    Router(config-pmap-c)# shape average 10000000 
    Router(config-pmap-c)# bandwidth remaining ratio 10 
    Router(config-pmap-c)# service-policy session_a_child 
    Router(config-pmap-c)# exit 
    Router(config-pmap)# exit 
    Router(config)# interface virtual-template 20 
    Router(config-if)# service-policy output session_a_parent 
    Router(config-if)# end

    Configuring and Applying QoS Hierarchical Queueing Policy Maps to Subinterfaces

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    policy-map policy-map-name

      4.    class class-default

      5.    shape average cir

      6.    exit

      7.    exit

      8.    interface type slot/subslot/port.subinterface

      9.    encapsulation dot1q outer-vlan-id [second-dot1qinner-vlan-id]

      10.    service-policy output policy-map-name

      11.    end


    DETAILED STEPS
       Command or ActionPurpose
      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 policy-map-name


      Example:
      Router(config)# policy-map subint_1
       

      Creates a policy map and enters policy-map configuration mode.

      • policy-map-name--The name of the policy map.
       
      Step 4 class class-default


      Example:
      Router(config-pmap)# class class-default
       

      Configures the traffic class as class-default and enters policy-map class configuration mode. Do not configure any other traffic class.

      Note   

      When a subinterface aggregates a number of sessions with queueing policies, a queueing policy at a subinterface level must be a one-level policy map configured as class-default.

       
      Step 5 shape average cir


      Example:
      Router(config-pmap-c)# shape average 10000000 
       

      Specifies average-rate traffic shaping for all traffic that does not match any other traffic class.

      • Enter the average keyword followed by the CIR, in bps.
      Note   

      When a subinterface aggregates a number of sessions with queueing policies, a queueing policy at a subinterface level must be a one-level policy map with only the shape feature enabled.

       
      Step 6 exit


      Example:
      Router(config-pmap-c)# exit
       

      Exits policy-map class configuration mode.

       
      Step 7 exit


      Example:
      Router(config-pmap)# exit
       

      Exits policy-map configuration mode.

       
      Step 8 interface type slot/subslot/port.subinterface

      Example:
      Router(config)# interface GigabitEthernet3/1/1.1
       

      Specifies the subinterface on which you are attaching the policy map and enters subinterface configuration mode.

      • Enter the interface type and slot number, subslot number, port number, and subinterface number.
       
      Step 9 encapsulation dot1q outer-vlan-id [second-dot1qinner-vlan-id]


      Example:
      Router(config-subif)# encapsulation dot1q 100
       

      Enables IEEE 802.1Q encapsulation of traffic on the subinterface.

      The second-dot1qkeywordsupports the IEEE 802.1 QinQ VLAN Tag Termination feature to configure an inner VLAN ID.

      • outer-vlan-id--The outer VLAN identifier. The range is from 1 to 4095.
      • inner-vlan-id--The inner VLAN identifier. The range is from 1 to 4095.
       
      Step 10 service-policy output policy-map-name


      Example:
      Router(config-subif)# service-policy output subint_1 
       

      Attaches the service policy to the subinterface.

      • policy-map-name--The name of the previously configured policy map.
      Note   

      You must specify the output keyword to apply the service policy to outbound traffic on the subinterface.

       
      Step 11 end


      Example:
      Router(config-subif)# end
       

      (Optional) Returns to privileged EXEC mode.

       

      Examples

      The following is an example of how to configure and apply a QoS hierarchical queueing policy map to a subinterface (and provide aggregate shaping for a large number of subscribers):

      Router> enable 
      Router# configure terminal
      Router(config)# policy-map subint_1
      Router(config-pmap)# class class-default
      Router(config-pmap-c)# shape average 10000000
      Router(config-pmap-c)# exit 
      Router(config-pmap)# exit 
      Router(config)# interface GigabitEthernet3/1/1.1
      Router(config-subif)# encapsulation dot1q 100
      Router(config-subif)# service-policy output subint_1
      Router(config-subif)# end 

      Displaying Policy-Map Information for Hierarchical Queueing

      SUMMARY STEPS

        1.    enable

        2.    show policy-map

        3.    show policy-map interface type number

        4.    show policy-map session

        5.    exit


      DETAILED STEPS
         Command or ActionPurpose
        Step 1 enable


        Example:
        Router> enable
         

        Enables privileged EXEC mode.

        • Enter your password if prompted.
         
        Step 2 show policy-map


        Example:
        Router# show policy-map
         

        (Optional) Displays all information for all class maps.

         
        Step 3 show policy-map interface type number


        Example:
        Router# 
        show policy-map interface GigabitEthernet4/0/0.1
         

        (Optional) Displays the packet statistics of all classes that are configured for all service policies either on the specified interface or subinterface or on a specific PVC on the interface.

        • Enter the interface type and number.
         
        Step 4 show policy-map session


        Example:
        Router# 
        show policy-map session
         

        (Optional) Displays the QoS policy map in effect for the SSS session.

         
        Step 5 exit


        Example:
        Router# exit
         

        (Optional) Exits privileged EXEC mode.

         

        Configuration Examples for QoS Hierarchical Queueing for Ethernet DSLAMs

        Example Policy Maps on VLANs or QinQ Subinterfaces

        The following example shows how to configure and apply QoS hierarchical queueing policy maps on VLANs or QinQ subinterfaces. A child queueing policy is applied to each parent subscriber line level policy. In this example, the policy maps are applied to create subscriber groups on subinterfaces.

        Router> enable 
        Router# configure terminal 
        Router(config)# policy-map service_a_out
        Router(config-pmap)# class voip
        Router(config-pmap-c)# priority 
        Router(config-pmap-c)# police cir percent 20 bc 300 ms pir precent 40
        Router(config-pmap-c)# set cos 1
        Router(config-pmap-c)# exit
        Router(config-pmap)# class video
        Router(config-pmap-c)# police cir percent 20 bc 300 ms pir prectent 40
        Router(config-pmap-c)# set cos 2
        Router(config-pmap-c)# exit
        Router(config-pmap)# class gaming
        Router(config-pmap-c)# bandwidth remaining percent 80 
        Router(config-pmap-c)# set cos 3
        Router(config-pmap-c)# exit
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# bandwidth remaining percent 20 
        Router(config-pmap-c)# set cos 4
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map service_z_out
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_1_service_a_in
        Router(config-pmap)# class voip
        Router(config-pmap-c)# police cir percent 25 4 ms 1 ms
        Router(config-pmap-c)# exit
        Router(config-pmap)# class gaming
        Router(config-pmap-c)# police cir percent 50 2 ms 1 ms
        Router(config-pmap-c)# exit
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# police percent 20 bc 300 ms pir 40
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_x_service_z_in
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_1_service_a_out
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# bandwidth remaining ratio 10
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# service policy service_a_out
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_x_service_z_out
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# bandwidth remaining ratio 10
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# service policy service_z_out
        Router(config-pmap-c)# exit 
        Router(config-pmap)# exit 
        Router(config)# interface GigabitEthernet1/0/0.1
        Router(config-subif)# encapsulation dot1q 5 second dot1q 20
        Router(config-subif)# service-policy output rate_1_service_a_out
        Router(config-subif)# service-policy input rate_1_service_a_in
        Router(config-subif)# exit
        Router(config)# interface GigabitEthernet1/0/0.2
        Router(config-subif)# encapsulation dot1q 5 second dot1q 25
        Router(config-subif)# service-policy output rate_x_service_z_out
        Router(config-subif)# service-policy input rate_x_service_z_in
        Router(config-subif)# end 

        Example Policy Maps on VLANs with Arbitrary QinQ

        The following example shows how to configure and apply QoS hierarchical queueing policy maps on VLANs with subscriber lines grouped by arbitrary QinQ. A child queueing policy is applied to each parent subscriber line level policy. This example includes the configuration of multiple class maps.

        Router> enable 
        Router# configure terminal 
        Router(config)# class-map match-all user_1
        Router(config-cmap)# match vlan 10
        Router(config-cmap)# exit
        Router(config)# class-map match-all user_2
        Router(config-cmap)# match vlan 11
        Router(config-cmap)# exit
        Router(config)# class-map match-all user_3
        Router(config-cmap)# match vlan 10
        Router(config-cmap)# exit
        Router(config)# class-map match-any user_4
        Router(config-cmap)# match vlan 11
        Router(config-cmap)# exit
        Router(config)# class-map match-all user_n
        Router(config-cmap)# exit
        Router(config)# class-map match-any isp_A
        Router(config-cmap)# match class user_1
        Router(config-cmap)# match class user_2
        Router(config-cmap)# exit
        Router(config)# class-map match-any isp_Z
        Router(config-cmap)# match class user_3
        Router(config-cmap)# match class user_4
        Router(config-cmap)# exit
        !
        Router(config)# policy-map service_a_out
        Router(config-pmap)# class voip
        Router(config-pmap-c)# priority 
        Router(config-pmap-c)# police cir percent 20 bc 300 ms pir precent 40
        Router(config-pmap-c)# set cos 1
        Router(config-pmap-c)# exit
        Router(config-pmap)# class video
        Router(config-pmap-c)# police cir percent 20 bc 300 ms pir precent 40
        Router(config-pmap-c)# set cos 2
        Router(config-pmap-c)# exit
        Router(config-pmap)# class gaming
        Router(config-pmap-c)# bandwidth remaining percent 80 
        Router(config-pmap-c)# set cos 3
        Router(config-pmap-c)# exit
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# bandwidth remaining percent 20 
        Router(config-pmap-c)# set cos 4
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map service_z_out
        Router(config)# policy-map service_a_in
        Router(config-pmap)# class voip
        Router(config-pmap-c)# police cir percent 25 4 ms 1 ms
        Router(config-pmap-c)# exit
        Router(config-pmap)# class gaming
        Router(config-pmap-c)# police cir percent 50 2 ms 1 ms
        Router(config-pmap-c)# exit
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# police cir percent 20 bc 300 ms pir precent 40
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map service_z_in
        Router(config-pmap)# exit
        !
        Router(config)# policy-map isp_A_out
        Router(config-pmap)# class user_1
        Router(config-pmap-c)# bandwidth remaining ratio 10
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# service policy service_a_out
        Router(config-pmap-c)# exit
        Router(config-pmap)# class user_n
        Router(config-pmap-c)# bandwidth remaining ratio 20
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# service policy service_z_out
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map isp_Z_out
        Router(config-pmap)# exit
        !
        Router(config)# policy-map isp_A_in
        Router(config-pmap)# class user_1
        Router(config-pmap-c)# service policy service_a_in
        Router(config-pmap-c)# class user_n
        Router(config-pmap-c)# service policy service_z_in
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map isp_Z_in
        Router(config-pmap)# exit
        !
        Router(config)# policy-map interface_policy_out
        Router(config-pmap)# class isp_A
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# service policy isp_A_out
        Router(config-pmap-c)# exit
        Router(config-pmap)# class isp_Z
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# service policy isp_Z_out
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map interface_policy_in
        Router(config-pmap)# class isp_A
        Router(config-pmap-c)# service policy isp_A_in
        Router(config-pmap-c)# exit
        Router(config-pmap)# class isp_Z
        Router(config-pmap-c)# service policy isp_Z_in
        Router(config-pmap-c)# exit 
        Router(config-pmap)# exit 
        !
        Router(config)# interface GigabitEthernet1/0/0.1 
        Router(config-subif)# encapsulation dot1q 5 second dot1q any 
        Router(config-subif)# service-policy output interface_policy_out 
        Router(config-subif)# service-policy input interface_policy_in 
        Router(config-subif)# end

        Example CPolicy Maps on Sessions

        The following example shows how to configure and apply QoS hierarchical queueing policy maps on sessions. A child queueing policy is applied to each parent subscriber line level policy.

        Router> enable 
        Router# configure terminal 
        Router(config)# policy-map service_a_out
        Router(config-pmap)# class voip
        Router(config-pmap-c)# priority 
        Router(config-pmap-c)# set cos 1
        Router(config-pmap-c)# exit
        Router(config-pmap)# class video
        Router(config-pmap-c)# set cos 2
        Router(config-pmap-c)# exit
        Router(config-pmap)# class gaming
        Router(config-pmap-c)# bandwidth remaining percent 80 
        Router(config-pmap-c)# set cos 3
        Router(config-pmap-c)# exit
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# bandwidth remaining percent 20 
        Router(config-pmap-c)# set cos 4
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map service_z_out
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_1_service_a_out
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# bandwidth remaining ratio 10
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# service-policy service_a_out
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_x_service_z_out
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# bandwidth remaining ratio 10
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# service-policy service_z_out
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_1_service_a_in
        Router(config-pmap)# class voip
        Router(config-pmap-c)# police cir percent 25 4 ms 1 ms
        Router(config-pmap-c)# exit
        Router(config-pmap)# class gaming
        Router(config-pmap-c)# police cir percent 50 2 ms 1 ms
        Router(config-pmap-c)# exit
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# police cir percent 20 bc 300 ms pir precent 40
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_x_service_z_in
        Router(config-pmap)# exit
        !
        Router(config)# policy-map isp_A_out
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# bandwidth remaining ratio 10
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        Router(config)# exit
        Router(config)# policy-map isp_Z_out
        Router(config-pmap-c)# exit
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# shape average 200000
        Router(config-pmap-c)# bandwidth remaining ratio 30
        Router(config-pmap-c)# exit 
        Router(config-pmap)# exit 
        Router(config)# interface GigabitEthernet1/0/0.1
        Router(config-subif)# encapsulation dot1q 1
        Router(config-subif)# service-policy output isp_A_out
        Router(config-subif)# exit
        Router(config)# interface GigabitEthernet2/0/0.2
        Router(config-subif)# encapsulation dot1q 2
        Router(config-subif)# service-policy output isp_Z_out
        Router(config-subif)# end
        

        Example Policy Maps on Sessions with Aggregate Shaping

        The following example shows how to configure and apply QoS hierarchical queueing policy maps on sessions with multiple PPP/IP sessions per subscriber line. In this example, the same policies are applied to all sessions using the same virtual interface.

        Router> enable 
        Router# configure terminal 
        Router(config)# policy-map service_a_out
        Router(config-pmap)# class voip
        Router(config-pmap-c) priority 
        Router(config-pmap-c)# police cir percent 25 4 ms 1 ms
        Router(config-pmap-c)# set cos 1 
        Router(config-pmap-c)# exit
        Router(config-pmap)# class video
        Router(config-pmap-c)# police cir percent 30 5 ms 1 ms
        Router(config-pmap-c)# set cos 2
        Router(config-pmap-c)# exit
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# bandwidth remaining percent 20
        Router(config-pmap-c)# set cos 3
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map service_z_out
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_1_service_a_in
        Router(config-pmap)# class voip
        Router(config-pmap-c)# police cir percent 25 4 ms 1 ms
        Router(config-pmap-c)# exit
        Router(config-pmap)# class video
        Router(config-pmap-c)# police cir percent 30 2 ms 1 ms
        Router(config-pmap-c)# exit
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# police cir percent 40 2 ms 1 ms
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_x_service_z_in
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_1_service_a_out
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# bandwidth remaining ratio 10
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# service policy service_a_out
        Router(config-pmap-c)# exit
        Router(config-pmap)# exit
        !
        Router(config)# policy-map rate_x_service_z_out
        Router(config-pmap)# class class-default
        Router(config-pmap-c)# bandwidth remaining ratio 10
        Router(config-pmap-c)# shape average 100000
        Router(config-pmap-c)# service policy service_z_out
        Router(config-pmap-c)# exit 
        Router(config-pmap)# exit 
        Router(config)# interface GigabitEthernet1/0/0 
        Router(config-if)# encapsulation dot1q 1 
        Router(config-if)# service-policy output isp_A_out 
        Router(config-if)# exit 
        Router(config)# interface GigabitEthernet2/0/0 
        Router(config-if)# encapsulation dot1q 2 
        Router(config-if)# service-policy output isp_Z_out 
        Router(config-if)# end 
        

        Additional References

        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

        Traffic shaping

        "Regulating Traffic Flow Using Traffic Shaping" module

        MQC

        "Applying QoS Features Using the MQC" 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 XE Software 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

        Feature Information for QoS Hierarchical Queueing for Ethernet DSLAMs

        The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

        Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

        Table 1 Feature Information for QoS Hierarchical Queueing for Ethernet DSLAMs

        Feature Name

        Releases

        Feature Information

        QoS Hierarchical Queueing for Ethernet DSLAMs

        Cisco IOS XE Release 2.4

        This feature module describes how to configure QoS hierarchical queueing policy maps on sessions and subinterfaces in Ethernet Digital Subscriber Line Access Multiplexer (E-DSLAM) applications.

        This feature was implemented on Cisco ASR 1000 Series Routers.