Software Configuration Guide, Cisco IOS Release 15.2(2)E (Catalyst 2960, 2960-S, 2960-SF and 2960-Plus Switches)
Configuring Auto-QoS
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Configuring Auto-QoS

Configuring Auto-QoS

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 http:/​/​www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Prerequisites for Auto-QoS

Before configuring standard QoS or auto-QoS, you must have a thorough understanding of these items:

  • The types of applications used and the traffic patterns on your network.
  • Traffic characteristics and needs of your network. Is the traffic bursty? Do you need to reserve bandwidth for voice and video streams?
  • Bandwidth requirements and speed of the network.
  • Location of congestion points in the network.

Auto-QoS VoIP Considerations

Before configuring auto-QoS for VoIP, you should be aware of this information:

  • Auto-QoS configures the switch for VoIP with Cisco IP Phones on nonrouted and routed ports. Auto-QoS also configures the switch for VoIP with devices running the Cisco SoftPhone application.

    Note


    When a device running Cisco SoftPhone is connected to a nonrouted or routed port, the switch supports only one Cisco SoftPhone application per port.


  • When enabling auto-QoS with a Cisco IP Phone on a routed port, you must assign a static IP address to the IP phone.
  • This release supports only Cisco IP SoftPhone Version 1.3(3) or later.
  • Connected devices must use Cisco Call Manager Version 4 or later.

Auto-QoS Enhanced Considerations

Auto-QoS is enhanced to support video. Automatic configurations are generated that classify and trust traffic from Cisco TelePresence systems and Cisco IP cameras.

Before configuring auto-QoS enhanced, you should be aware of this information:

  • The auto qos srnd4 global configuration command is generated as a result of enhanced auto-QoS configuration.

Restrictions for Auto-QoS

The following are restrictions for automatic QoS (auto-QoS):

  • Auto-QoS (and enhanced auto-QoS) is not supported on switches running the LAN Lite image.
  • After auto-QoS is enabled, do not modify a policy map or aggregate policer that includes AutoQoS in its name. If you need to modify the policy map or aggregate policer, make a copy of it, and change the copied policy map or policer. To use this new policy map instead of the generated one, remove the generated policy map from the interface, and apply the new policy map to the interface.
  • To take advantage of the auto-QoS defaults, you should enable auto-QoS before you configure other QoS commands. If necessary, you can fine-tune the QoS configuration, but we recommend that you do so only after the auto-QoS configuration is completed.
  • By default, the CDP is enabled on all ports. For auto-QoS to function properly, do not disable CDP.

Note


You can enable auto-QoS on static, dynamic-access, voice VLAN access, and trunk ports.


Information About Configuring Auto-QoS

Auto-QoS Overview

You can use the auto-QoS feature to simplify the deployment of QoS features. Auto-QoS determines the network design and enables QoS configurations so that the switch can prioritize different traffic flows. It uses the ingress and egress queues instead of using the default (disabled) QoS behavior. The switch offers best-effort service to each packet, regardless of the packet contents or size, and sends it from a single queue.

When you enable auto-QoS, it automatically classifies traffic based on the traffic type and ingress packet label. The switch uses the classification results to choose the appropriate egress queue.

You can use auto-QoS commands to identify ports connected to the following Cisco devices:

  • Cisco IP Phones
  • Devices running the Cisco SoftPhone application
  • Cisco TelePresence
  • Cisco IP Camera
  • Cisco digital media player

You also use the auto-QoS commands to identify ports that receive trusted traffic through an uplink. Auto-QoS then performs these functions:

  • Detects the presence or absence of auto-QoS devices through conditional trusted interfaces.
  • Configures QoS classification
  • Configures egress queues

Generated Auto-QoS Configuration

By default, auto-QoS is disabled on all ports. Packets are not modified--the CoS, DSCP and IP precedence values in the packet are not changed.

When you enable the auto-QoS feature on the first port of the interface:

  • Ingress packet label is used to categorize traffic, to assign packet labels, and to configure the ingress and egress queues.
  • QoS is globally enabled (mls qos global configuration command), and other global configuration commands are automatically generated. (See Examples: Global Auto-QoS Configuration).
  • Switch enables the trusted boundary feature and uses the Cisco Discovery Protocol (CDP) to detect the presence of a supported device.
  • Policing is used to determine whether a packet is in or out of profile and specifies the action on the packet.

VoIP Device Specifics

The following actions occur when you issue these auto-QoS commands on a port:

  • auto qos voip cisco-phone—When you enter this command on a port at the network edge connected to a Cisco IP Phone, the switch enables the trusted boundary feature. If the packet does not have a DSCP value of 24, 26, or 46 or is out of profile, the switch changes the DSCP value to 0. When there is no Cisco IP Phone, the ingress classification is set to not trust the QoS label in the packet. The policing is applied to the traffic matching the policy-map classification before the switch enables the trust boundary feature.
  • auto qos voip cisco-softphone —When you enter this interface configuration command on a port at the network edge that is connected to a device running the Cisco SoftPhone, the switch uses policing to determine whether a packet is in or out of profile and to specify the action on the packet. If the packet does not have a DSCP value of 24, 26, or 46 or is out of profile, the switch changes the DSCP value to 0.
  • auto qos voip trust—When you enter this interface configuration command on a port connected to the network interior, the switch trusts the CoS value for nonrouted ports or the DSCP value for routed ports in ingress packets (the assumption is that traffic has already been classified by other edge devices).

The switch configures egress queues on the port according to the settings in the following tables.

Table 1 Traffic Types, Packet Labels, and Queues
 

VoIP Data Traffic

VoIP Control 
Traffic

Routing Protocol Traffic

STP BPDU Traffic

Real-Time Video Traffic

All Other Traffic

DSCP value

46

24, 26

48

56

34

CoS value

5

3

6

7

3

CoS-to-Ingress queue map

4, 5 (queue 2)

0, 1, 2, 3, 6, 7(queue 1)

CoS-to-Egress queue map

4, 5 
(queue 1)

2, 3, 6, 7 (queue 2)

0 (queue 3)

2 (queue 3)

0, 1 
(queue 4)

The following table describes the auto-QoS configuration for ingress queues.

The switch configures ingress queues on the port according to the settings in the following table. This table shows the generated auto-QoS configuration for the ingress queues.

Table 2 Auto-QoS Configuration for the Ingress Queues

Ingress Queue

Queue Number

CoS-to-Queue Map

Queue Weight (Bandwidth)

Queue (Buffer) Size

SRR shared

1

0, 1, 2, 3, 6, 7

70 percent

90 percent

Priority

2

4, 5

30 percent

10 percent

  • When you enable auto-QoS by using the auto qos voip cisco-phone, the auto qos voip cisco-softphone, or the auto qos voip trust interface configuration command, the switch automatically generates a QoS configuration based on the traffic type and ingress packet label and applies the commands listed in Examples: Global Auto-QoS Configuration to the port.

Effects of Auto-QoS on Running Configuration

When auto-QoS is enabled, the auto qos interface configuration commands and the generated global configuration are added to the running configuration.

The switch applies the auto-QoS-generated commands as if the commands were entered from the CLI. An existing user configuration can cause the application of the generated commands to fail or to be overridden by the generated commands. These actions may occur without warning. If all the generated commands are successfully applied, any user-entered configuration that was not overridden remains in the running configuration. Any user-entered configuration that was overridden can be retrieved by reloading the switch without saving the current configuration to memory. If the generated commands are not applied, the previous running configuration is restored.

How to Configure Auto-QoS

Configuring Auto-QoS

Enabling Auto-QoS

For optimum QoS performance, enable auto-QoS on all the devices in your network.

SUMMARY STEPS

    1.    configure terminal

    2.    interface interface-id

    3.    Use one of the following:

    • auto qos voip {cisco-phone | cisco-softphone | trust}
    • auto qos video {cts | ip-camera | media-player}
    • auto qos classify [police]
    • auto qos trust {cos | dscp}

    4.    exit

    5.    interface interface-id

    6.    auto qos trust

    7.    end

    8.    show auto qos interface interface-id


DETAILED STEPS
     Command or ActionPurpose
    Step 1configure terminal


    Example:
    
    Switch# configure terminal
    
    
     

    Enters global configuration mode.

     
    Step 2interface interface-id


    Example:
    
    Switch(config)# interface 
    gigabitethernet 3/0/1
    
    
     

    Specifies the port that is connected to a video device or the uplink port that is connected to another trusted switch or router in the network interior, and enters interface configuration mode.

     
    Step 3Use one of the following:
    • auto qos voip {cisco-phone | cisco-softphone | trust}
    • auto qos video {cts | ip-camera | media-player}
    • auto qos classify [police]
    • auto qos trust {cos | dscp}


    Example:
    Switch(config-if)# auto qos trust dscp
    
    
     

    Enables auto-QoS for VoIP.

    • cisco-phone—If the port is connected to a Cisco IP Phone, the QoS labels of incoming packets are trusted only when the telephone is detected.
    • cisco-softphone—The port is connected to device running the Cisco SoftPhone feature.
    • trust—The uplink port is connected to a trusted switch or router, and the VoIP traffic classification in the ingress packet is trusted.

    Enables auto-QoS for a video device.

    • cts—A port connected to a Cisco Telepresence system.
    • ip-camera—A port connected to a Cisco video surveillance camera.
    • media-player—A port connected to a CDP-capable Cisco digital media player.

    QoS labels of incoming packets are trusted only when the system is detected.

    Enables auto-QoS for classification.

    • police—Policing is set up by defining the QoS policy maps and applying them to ports (port-based QoS).

    Enables auto-QoS for trusted interfaces.

    • cos—Class of service.
    • dscp—Differentiated Services Code Point.
    • <cr>—Trust interface.

     

    Step 4exit


    Example:
    
    Switch(config-if)# exit
    
    
     

    Returns to global configuration mode.

     
    Step 5interface interface-id


    Example:
    
    Switch(config)# interface 
    gigabitethernet 2/0/1
    
    
     

    Specifies the switch port identified as connected to a trusted switch or router, and enters interface configuration mode.

     
    Step 6auto qos trust


    Example:
    
    Switch(config-if)# auto qos trust
    
    
     

    Enables auto-QoS on the port, and specifies that the port is connected to a trusted router or switch.

     
    Step 7end


    Example:
    
    Switch(config-if)# end
    
    
     

    Returns to privileged EXEC mode.

     
    Step 8show auto qos interface interface-id


    Example:
    
    Switch# show auto qos interface 
    gigabitethernet 2/0/1
    
    
     

    Verifies your entries.

    This command displays the auto-QoS command on the interface on which auto-QoS was enabled. You can use the show running-config privileged EXEC command to display the auto-QoS configuration and the user modifications.

     

    Troubleshooting Auto-QoS

    To display the QoS commands that are automatically generated when auto-QoS is enabled or disabled, enter the debug auto qos privileged EXEC command before you enable auto-QoS. For more information, see the debug auto qos command in the command reference for this release.

    To disable auto-QoS on a port, use the no form of the auto qos command interface configuration command, such as no auto qos voip.


    Note


    Auto-QoS generated global commands can also be removed manually if desired.


    Only the auto-QoS-generated interface configuration commands for this port are removed. If this is the last port on which auto-QoS is enabled and you enter the no auto qos voip command, auto-QoS is considered disabled even though the auto-QoS-generated global configuration commands remain (to avoid disrupting traffic on other ports affected by the global configuration).

    You can use the no mls qos global configuration command to disable the auto-QoS-generated global configuration commands. With QoS disabled, there is no concept of trusted or untrusted ports because the packets are not modified (the CoS, DSCP, and IP precedence values in the packet are not changed). Traffic is switched in pass-through mode (packets are switched without any rewrites and classified as best effort without any policing).

    Monitoring Auto-QoS

    Table 3 Commands for Monitoring Auto-QoS

    Command

    Description

    show auto qos [interface [interface-type]]

    Displays the initial auto-QoS configuration.

    You can compare the show auto qos and the show running-config command output to identify the user-defined QoS settings.

    show mls qos aggregate policer policer_name

    Displays information about the QoS aggregate policer configuration that might be affected by auto-QoS.

    show mls qos interface [interface-type | buffers | policers | queueing | statistics ]

    Displays information about the QoS interface configuration that might be affected by auto-QoS.

    show mls qos maps [cos-dscp | cos-output-q | dscp-cos | dscp-mutation | dscp-output-q | ip-prec-dscp | policed-dscp ]

    Displays information about the QoS maps configuration that might be affected by auto-QoS.

    show mls qos queue-set queue-set ID

    Displays information about the QoS queue-set configuration that might be affected by auto-QoS.

    show mls qos stack-port buffers

    Displays information about the QoS stack port buffer configuration that might be affected by auto-QoS.

    show mls qos stack-qset

    Displays information about the QoS stack queue set configuration that might be affected by auto-QoS.

    show running-config

    Displays information about the QoS configuration that might be affected by auto-QoS.

    You can compare the show auto qos and the show running-config command output to identify the user-defined QoS settings.

    Configuration Examples for Auto-Qos

    Examples: Global Auto-QoS Configuration

    The following table describes the automatically generated commands for auto-QoS and enhanced auto-QoS by the switch.

    Table 4  Generated Auto-QoS Configuration

    Description

    Automatically Generated Command {voip}

    Enhanced Automatically Generated Command {Video|Trust|Classify}

    The switch automatically enables standard QoS and configures the CoS-to-DSCP map (maps CoS values in incoming packets to a DSCP value).

    
    Switch(config)# mls qos
    Switch(config)# mls qos map cos-dscp 
    0 8 16 26 32 46 48 56
    
    
    
    Switch(config)# mls qos
    Switch(config)# mls qos map cos-dscp 
    0 8 16 24 32 46 48 56
    
    

    The switch automatically maps CoS values to an egress queue and to a threshold ID.

    
    Switch(config)# no mls qos srr-queue 
    output cos-map
    Switch(config)# mls qos srr-queue 
    output cos-map queue 1 threshold 3 5
    Switch(config)# mls qos srr-queue 
    output cos-map queue 2 threshold 3 3 
    6 7
    Switch(config)# mls qos srr-queue 
    output cos-map queue 3 threshold 3 2 
    4
    Switch(config)# mls qos srr-queue 
    output cos-map queue 4 threshold 2 1
    Switch(config)# mls qos srr-queue 
    output cos-map queue 4 threshold 3 0
    
    
    
    Switch(config)# no mls qos srr-queue 
    output cos-map
    Switch(config)# mls qos srr-queue 
    output cos-map queue 1 threshold 3 4 5
    Switch(config)# mls qos srr-queue 
    output cos-map queue 2 threshold 3 6 7
    Switch(config)# mls qos srr-queue 
    output cos-map queue 2 threshold 1 2
    Switch(config)# mls qos srr-queue 
    output cos-map queue 2 threshold 2 3
    Switch(config)# mls qos srr-queue 
    output cos-map queue 3 threshold 3 0
    
    Switch(config)# mls qos srr-queue 
    output cos-map queue 4 threshold 3 1
    
    

    The switch automatically maps DSCP values to an egress queue and to a threshold ID.

    
    Switch(config)# no mls qos srr-queue 
    output dscp-map
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 1 threshold 3 
    40 41 42 43 44 45 46 47
    
    
    
    
    
    
    
    
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 2 threshold 3 
    24 25 26 27 28 29 30 31
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 2 threshold 3 
    48 49 50 51 52 53 54 55
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 2 threshold 3 
    56 57 58 59 60 61 62 63
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 3 threshold 3 
    16 17 18 19 20 21 22 23
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 3 threshold 3 
    32 33 34 35 36 37 38 39
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 4 threshold 1 8
    
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 4 threshold 2 9 
    10 11 12 13 14 15
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 
    4 threshold 3 0 1 2 3 4 5 6 7
    
    
    
    Switch(config)# no mls qos srr-queue 
    output dscp-map
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 1 threshold 3 32 
    33 40 41 42 43 44 45 46 47
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 2 threshold 1 16 
    17 18 19 20 21 22 23 
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 2 threshold 1 26 
    27 28 29 30 31 34 35 36 37 38 39
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 2 threshold 2 24
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 2 threshold 3 48 
    49 50 51 52 53 54 55 56
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 2 threshold 3 57 
    58 59 60 61 62 63
    
    
    
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 3 threshold 3 0 
    1 2 3 4 5 6 7
    
    
    
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 4 threshold 1 8 
    9 11 13 15
    Switch(config)# mls qos srr-queue 
    output dscp-map queue 4 threshold 2 10 
    12 14
    
    

    The switch automatically configures the egress queue buffer sizes. It configures the bandwidth and the SRR mode (shaped or shared) on the egress queues mapped to the port.

    
    Switch(config)# mls qos queue-set 
    output 1 threshold 1 138 138 92 138
    Switch(config)# mls qos queue-set 
    output 1 threshold 2 138 138 92 400
    Switch(config)# mls qos queue-set 
    output 1 threshold 3 36 77 100 318
    Switch(config)# mls qos queue-set 
    output 1 threshold 4 20 50 67 400
    Switch(config)# mls qos queue-set 
    output 2 threshold 1 149 149 100 149
    Switch(config)# mls qos queue-set 
    output 2 threshold 2 118 118 100 235
    Switch(config)# mls qos queue-set 
    output 2 threshold 3 41 68 100 272
    Switch(config)# mls qos queue-set 
    output 2 threshold 4 42 72 100 242
    Switch(config)# mls qos queue-set 
    output 1 buffers 10 10 26 54
    Switch(config)# mls qos queue-set 
    output 2 buffers 16 6 17 61
    Switch(config-if)# priority-queue 
    out
    Switch(config-if)# srr-queue 
    bandwidth share 10 10 60 20
    
    
    
    Switch(config)# mls qos queue-set 
    output 1 threshold 2 100 100 50 200
    Switch(config)# mls qos queue-set 
    output 1 threshold 2 125 125 100 400
    Switch(config)# mls qos queue-set 
    output 1 threshold 3 100 100 100 400
    Switch(config)# mls qos queue-set
    output 1 threshold 4 60 150 50 200
    
    
    
    
    
    
    
    
    Switch(config)# mls qos queue-set 
    output 1 buffers 15 25 40 20
    
    

    Examples: Auto-QoS Generated Configuration for VoIP Devices

    The following table describes the automatically generated commands for auto-QoS for VoIP devices by the switch.

    Table 5 Generated Auto-QoS Configuration for VoIP Devices

    Description

    Automatically Generated Command (VoIP)

    The switch automatically enables standard QoS and configures the CoS-to-DSCP map (maps CoS values in incoming packets to a DSCP value).

    Switch(config)# mls qos
    Switch(config)# mls qos map cos-dscp 0 8 16 26 32
    46 48 56
    
    

    The switch automatically sets up the ingress queues, with queue 2 as the priority queue and queue 1 in shared mode. The switch also configures the bandwidth and buffer size for the ingress queues.

    Switch(config)# no mls qos srr-queue input cos-map
    Switch(config)# mls qos srr-queue input cos-map queue 1
    threshold 2 1
    Switch(config)# mls qos srr-queue input cos-map queue 1
    threshold 3 0
    Switch(config)# mls qos srr-queue input cos-map queue 2
    threshold 1 2
    Switch(config)# mls qos srr-queue input cos-map queue 2
    threshold 2 4 6 7
    Switch(config)# mls qos srr-queue input cos-map queue 2
    threshold 3 3 5
    
    

    The switch automatically maps CoS values to an egress queue and to a threshold ID.

    Switch(config)# no mls qos srr-queue output cos-map
    Switch(config)# mls qos srr-queue output cos-map queue 1
    threshold 3 5
    Switch(config)# mls qos srr-queue output cos-map queue 2
    threshold 3 3 6 7
    Switch(config)# mls qos srr-queue output cos-map queue 3
    threshold 3 2 4
    Switch(config)# mls qos srr-queue output cos-map queue 4
    threshold 2 1
    Switch(config)# mls qos srr-queue output cos-map queue 4
    threshold 3 0
    
    

    The switch automatically maps DSCP values to an ingress queue and to a threshold ID.

    Switch(config)# no mls qos srr-queue input dscp-map
    Switch(config)# mls qos srr-queue input dscp-map queue 1
    threshold 2 9 10 11 12 13 14 15
    Switch(config)# mls qos srr-queue input dscp-map queue 1
    threshold 3 0 1 2 3 4 5 6 7
    Switch(config)# mls qos srr-queue input dscp-map queue 1
    threshold 3 32
    Switch(config)# mls qos srr-queue input dscp-map queue 2
    threshold 1 16 17 18 19 20 21 22 23
    Switch(config)# mls qos srr-queue input dscp-map queue 2
    threshold 2 33 34 35 36 37 38 39 48
    Switch(config)# mls qos srr-queue input dscp-map queue 2
    threshold 2 49 50 51 52 53 54 55 56
    Switch(config)# mls qos srr-queue input dscp-map queue 2
    threshold 2 57 58 59 60 61 62 63
    Switch(config)# mls qos srr-queue input dscp-map queue 2
    threshold 3 24 25 26 27 28 29 30 31
    Switch(config)# mls qos srr-queue input dscp-map queue 2
    threshold 3 40 41 42 43 44 45 46 47
    
    

    The switch automatically maps DSCP values to an egress queue and to a threshold ID.

    Switch(config)# no mls qos srr-queue output dscp-map
    Switch(config)# mls qos srr-queue output dscp-map queue 1
    threshold 3 40 41 42 43 44 45 46 47
    Switch(config)# mls qos srr-queue output dscp-map queue 2
    threshold 3 24 25 26 27 28 29 30 31
    Switch(config)# mls qos srr-queue output dscp-map queue 2
    threshold 3 48 49 50 51 52 53 54 55
    Switch(config)# mls qos srr-queue output dscp-map queue 2
    threshold 3 56 57 58 59 60 61 62 63
    Switch(config)# mls qos srr-queue output dscp-map queue 3
    threshold 3 16 17 18 19 20 21 22 23
    Switch(config)# mls qos srr-queue output dscp-map queue 3
    threshold 3 32 33 34 35 36 37 38 39
    Switch(config)# mls qos srr-queue output dscp-map queue 4
    threshold 1 8
    Switch(config)# mls qos srr-queue output dscp-map queue 4
    threshold 2 9 10 11 12 13 14 15
    Switch(config)# mls qos srr-queue output dscp-map queue 4
    threshold 3 0 1 2 3 4 5 6 7
    
    

    The switch automatically sets up the ingress queues, with queue 2 as the priority queue and queue 1 in shared mode. The switch also configures the bandwidth and buffer size for the ingress queues.

    
    Switch(config)# no mls qos srr-queue input priority-queue 1
    Switch(config)# no mls qos srr-queue input priority-queue 2
    Switch(config)# mls qos srr-queue input bandwidth 90 10
    Switch(config)# mls qos srr-queue input threshold 1 8 16
    Switch(config)# mls qos srr-queue input threshold 2 34 66
    Switch(config)# mls qos srr-queue input buffers 67 33
    
    

    The switch automatically configures the egress queue buffer sizes. It configures the bandwidth and the SRR mode (shaped or shared) on the egress queues mapped to the port.

    
    SwitchSwitchconfig)# mls qos queue-set output 1 threshold 1 138
    138 92 138
    Switch(config)# mls qos queue-set output 1 threshold 2 138
    138 92 400
    Switch(config)# mls qos queue-set output 1 threshold 3 36 77
    100 318
    Switch(config)# mls qos queue-set output 1 threshold 4 20 50
    67 400
    Switch(config)# mls qos queue-set output 2 threshold 1 149
    149 100 149
    Switch(config)# mls qos queue-set output 2 threshold 2 118
    118 100 235
    Switch(config)# mls qos queue-set output 2 threshold 3 41 68
    100 272
    Switch(config)# mls qos queue-set output 2 threshold 4 42 72
    100 242
    Switch(config)# mls qos queue-set output 1 buffers 10 10 26
    54
    Switch(config)# mls qos queue-set output 2 buffers 16 6 17
    61
    Switch(config-if)# priority-que out
    Switch(config-if)# srr-queue bandwidth share 10 10 60 20
    
    

    If you entered the auto qos voip cisco-phone command, the switch automatically enables the trusted boundary feature, which uses the CDP to detect the presence or absence of a Cisco IP Phone (as shown below).

    
    Switch(config-if)# mls qos trust device cisco-phone
    
    

    If you entered the auto qos voip cisco-softphone command, the switch automatically creates class maps and policy maps (as shown below).

    
    Switch(config)# mls qos map policed-dscp 24 26 46 to 0
    Switch(config)# class-map match-all AutoQoS-VoIP-RTP-Trust
    Switch(config-cmap)# match ip dscp ef
    Switch(config)# class-map match-all AutoQoS-VoIP-Control-Trust
    Switch(config-cmap)# match ip dscp cs3 af31
    Switch(config)# policy-map AutoQoS-Police-SoftPhone
    Switch(config-pmap)# class AutoQoS-VoIP-RTP-Trust
    Switch(config-pmap-c)# set dscp ef
    Switch(config-pmap-c)# police 320000 8000 exceed-action policed-dscp-transmit
    Switch(config-pmap)# class AutoQoS-VoIP-Control-Trust
    Switch(config-pmap-c)# set dscp cs3
    Switch(config-pmap-c)# police 32000 8000 exceed-action policed-dscp-transmit
    
    

    After creating the class maps and policy maps, the switch automatically applies the policy map called AutoQoS-Police-SoftPhone to an ingress interface on which auto-QoS with the Cisco SoftPhone feature is enabled (as shown below).

    
    Switch(config-if)# service-policy input AutoQoS-Police-SoftPhone
    
    

    Examples: Auto-QoS Generated Configuration For Enhanced Video, Trust, and Classify Devices

    If you entered the following enhanced auto-QoS commands, the switch configures a CoS-to-DSCP map (maps CoS values in incoming packets to a DSCP value):

    • auto qos video cts
    • auto qos video ip-camera
    • auto qos video media-player
    • auto qos trust
    • auto qos trust cos
    • auto qos trust dscp The following command is initiated after entering one of the above auto-QoS commands:
      
      Switch(config)# mls qos map cos-dscp 0 8 16 24 32 46 48 56
      
      

      Note


      No class maps and policy maps are configured.


    If you entered the auto qos classify command, the switch automatically creates class maps and policy maps (as shown below).

    
    Switch(config)# mls qos map policed-dscp 0 10 18 24 26 46 to 8
    Switch(config)# mls qos map cos-dscp 0 8 16 24 32 46 48 56
    Switch(config)# class-map match-all AUTOQOS_MULTIENHANCED_CONF_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-MULTIENHANCED-CONF
    Switch(config)# class-map match-all AUTOQOS_DEFAULT_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-DEFAULT
    Switch(config)# class-map match-all AUTOQOS_TRANSACTION_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-TRANSACTIONAL-DATA
    Switch(config)# class-map match-all AUTOQOS_SIGNALING_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-SIGNALING
    Switch(config)# class-map match-all AUTOQOS_BULK_DATA_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-BULK-DATA
    Switch(config)# class-map match-all AUTOQOS_SCAVANGER_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-SCAVANGER
    Switch(config)# policy-map AUTOQOS-SRND4-CLASSIFY-POLICY
    Switch(config-pmap)# class AUTOQOS_MULTIENHANCED_CONF_CLASS
    Switch(config-pmap-c)# set dscp af41
    Switch(config-pmap)# class AUTOQOS_BULK_DATA_CLASS
    Switch(config-pmap-c)# set dscp af11
    Switch(config-pmap)# class AUTOQOS_TRANSACTION_CLASS
    Switch(config-pmap-c)# set dscp af21
    Switch(config-pmap)# class AUTOQOS_SCAVANGER_CLASS
    Switch(config-pmap-c)# set dscp cs1
    Switch(config-pmap)# class AUTOQOS_SIGNALING_CLASS
    Switch(config-pmap-c)# set dscp cs3
    Switch(config-pmap)# class AUTOQOS_DEFAULT_CLASS
    Switch(config-pmap-c)# set dscp default
    ;
    Switch(config-if)# service-policy input AUTOQOS-SRND4-CLASSIFY-POLICY
    
    

    If you entered the auto qos classify police command, the switch automatically creates class maps and policy maps (as shown below).

    
    Switch(config)# mls qos map policed-dscp 0 10 18 24 26 46 to 8
    Switch(config)# mls qos map cos-dscp 0 8 16 24 32 46 48 56
    Switch(config)# class-map match-all AUTOQOS_MULTIENHANCED_CONF_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-MULTIENHANCED-CONF
    Switch(config)# class-map match-all AUTOQOS_DEFAULT_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-DEFAULT
    Switch(config)# class-map match-all AUTOQOS_TRANSACTION_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-TRANSACTIONAL-DATA
    Switch(config)# class-map match-all AUTOQOS_SIGNALING_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-SIGNALING
    Switch(config)# class-map match-all AUTOQOS_BULK_DATA_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-BULK-DATA
    Switch(config)# class-map match-all AUTOQOS_SCAVANGER_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-SCAVANGER
    Switch(config)# policy-map AUTOQOS-SRND4-CLASSIFY-POLICE-POLICY
    Switch(config-pmap)# class AUTOQOS_MULTIENHANCED_CONF_CLASS
    Switch(config-pmap-c)# set dscp af41
    Switch(config-pmap-c)# police 5000000 8000 exceed-action drop
    Switch(config-pmap)# class AUTOQOS_BULK_DATA_CLASS
    Switch(config-pmap-c)# set dscp af11
    Switch(config-pmap-c)# police 10000000 8000 exceed-action policed-dscp-transmit
    Switch(config-pmap)# class AUTOQOS_TRANSACTION_CLASS
    Switch(config-pmap-c)# set dscp af21
    Switch(config-pmap-c)# police 10000000 8000 exceed-action policed-dscp-transmit
    Switch(config-pmap)# class AUTOQOS_SCAVANGER_CLASS
    Switch(config-pmap-c)# set dscp cs1
    Switch(config-pmap-c)# police 10000000 8000 exceed-action drop
    Switch(config-pmap)# class AUTOQOS_SIGNALING_CLASS
    Switch(config-pmap-c)# set dscp cs3
    Switch(config-pmap-c)# police 32000 8000 exceed-action drop
    Switch(config-pmap)# class AUTOQOS_DEFAULT_CLASS
    Switch(config-pmap-c)# set dscp default
    Switch(config-pmap-c)# police 10000000 8000 exceed-action policed-dscp-transmit
    ;
    Switch(config-if)# service-policy input AUTOQOS-SRND4-CLASSIFY-POLICE-POLICY
    
    

    This is the enhanced configuration for the auto qos voip cisco-phone command:

    
    Switch(config)# mls qos map policed-dscp 0 10 18 24 26 46 to 8
    Switch(config)# mls qos map cos-dscp 0 8 16 24 32 46 48 56
    Switch(config)# class-map match-all AUTOQOS_VOIP_DATA_CLASS
    Switch(config-cmap)# match ip dscp ef 
    Switch(config)# class-map match-all AUTOQOS_DEFAULT_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-DEFAULT
    Switch(config)# class-map match-all AUTOQOS_VOIP_SIGNAL_CLASS
    Switch(config-cmap)# match ip dscp cs3 
    Switch(config)# policy-map AUTOQOS-SRND4-CISCOPHONE-POLICY
    Switch(config-pmap)# class AUTOQOS_VOIP_DATA_CLASS
    Switch(config-pmap-c)# set dscp ef
    Switch(config-pmap-c)# police 128000 8000 exceed-action policed-dscp-transmit
    Switch(config-pmap)# class AUTOQOS_VOIP_SIGNAL_CLASS
    Switch(config-pmap-c)# set dscp cs3
    Switch(config-pmap-c)# police 32000 8000 exceed-action policed-dscp-transmit
    Switch(config-pmap)# class AUTOQOS_DEFAULT_CLASS
    Switch(config-pmap-c)# set dscp default
    Switch(config-pmap-c)# police 10000000 8000 exceed-action policed-dscp-transmit
    ;
    Switch(config-if)# service-policy input AUTOQOS-SRND4-CISCOPHONE-POLICY
    
    

    This is the enhanced configuration for the auto qos voip cisco-softphone command:

    
    Switch(config)# mls qos map policed-dscp 0 10 18 24 26 46 to 8
    Switch(config)# mls qos map cos-dscp 0 8 16 24 32 46 48 56
    Switch(config)# class-map match-all AUTOQOS_MULTIENHANCED_CONF_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-MULTIENHANCED-CONF
    Switch(config)# class-map match-all AUTOQOS_VOIP_DATA_CLASS
    Switch(config-cmap)# match ip dscp ef 
    Switch(config)# class-map match-all AUTOQOS_DEFAULT_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-DEFAULT
    Switch(config)# class-map match-all AUTOQOS_TRANSACTION_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-TRANSACTIONAL-DATA
    Switch(config)# class-map match-all AUTOQOS_VOIP_SIGNAL_CLASS
    Switch(config-cmap)# match ip dscp cs3
    Switch(config)# class-map match-all AUTOQOS_SIGNALING_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-SIGNALING
    Switch(config)# class-map match-all AUTOQOS_BULK_DATA_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-BULK-DATA
    Switch(config)# class-map match-all AUTOQOS_SCAVANGER_CLASS
    Switch(config-cmap)# match access-group name AUTOQOS-ACL-SCAVANGER
    
    Switch(config)# policy-map AUTOQOS-SRND4-SOFTPHONE-POLICY
    Switch(config-pmap)# class AUTOQOS_VOIP_DATA_CLASS
    Switch(config-pmap-c)# set dscp ef
    Switch(config-pmap-c)# police 128000 8000 exceed-action policed-dscp-transmit
    Switch(config-pmap)# class AUTOQOS_VOIP_SIGNAL_CLASS
    Switch(config-pmap-c)# set dscp cs3
    Switch(config-pmap-c)# police 32000 8000 exceed-action policed-dscp-transmit
    Switch(config-pmap)#class AUTOQOS_MULTIENHANCED_CONF_CLASS
    Switch(config-pmap-c)#set dscp af41
    Switch(config-pmap-c)# police 5000000 8000 exceed-action drop
    Switch(config-pmap)# class AUTOQOS_BULK_DATA_CLASS
    Switch(config-pmap-c)# set dscp af11
    Switch(config-pmap-c)# police 10000000 8000 exceed-action policed-dscp-transmit
    Switch(config-pmap)# class AUTOQOS_TRANSACTION_CLASS
    Switch(config-pmap-c)# set dscp af21
    Switch(config-pmap-c)# police 10000000 8000 exceed-action policed-dscp-transmit
    Switch(config-pmap)# class AUTOQOS_SCAVANGER_CLASS
    Switch(config-pmap-c)# set dscp cs1
    Switch(config-pmap-c)# police 10000000 8000 exceed-action drop
    Switch(config-pmap)# class AUTOQOS_SIGNALING_CLASS
    Switch(config-pmap-c)# set dscp cs3
    Switch(config-pmap-c)# police 32000 8000 exceed-action drop
    Switch(config-pmap)# class AUTOQOS_DEFAULT_CLASS
    Switch(config-pmap-c)# set dscp default
    ;
    Switch(config-if)# service-policy input AUTOQOS-SRND4-SOFTPHONE-POLICY
    
    

    Where to Go Next for Auto-QoS

    Review the QoS documentation if you require any specific QoS changes to your auto-QoS configuration.