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.

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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.

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.

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 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

Auto-QoS Compact Overview

When you enter an auto-QoS command, the switch displays all the generated commands as if the commands were entered from the CLI. You can use the auto-QoS compact feature to hide the auto-QoS generated commands from the running configuration. This would make it easier to comprehend the running-configuration and also help to increase efficient usage of memory.

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 activities occur when you issue these auto-QoS commands on a port:

  • When you enter the auto qos voip cisco-phone 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.

  • When you enter the auto qos voip cisco-softphone 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.

  • When you enter the auto qos voip trust 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).

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 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

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

Table 3. Auto-QoS Configuration for the Egress Queues

Egress Queue

Egress Queue

Queue Number

Queue Weight (Bandwidth)

Queue (Buffer) Size for Gigabit-Capable Ports

Queue (Buffer) Size for 10/100 Ethernet Ports

Priority

1

4, 5

up to100 percent

25 percent

15 percent

SRR shared

2

2, 3, 6, 7

10 percent

25 percent

25 percent

SRR shared

3

0

60 percent

25 percent

40 percent

SRR shared

4

1

20 percent

25 percent

20 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.

Enhanced Auto-QoS for Video, Trust, and Classification

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

Auto-QoS Configuration Migration

Auto-QoS configuration migration from legacy auto-QoS to enhanced auto-QoS occurs when:

  • A switch is booted with a 12.2(55)SE image and QoS is not enabled.

    Any video or voice trust configuration on the interface automatically generates enhanced auto-QoS commands.

  • A switch is enabled with QoS, these guidelines take effect:

    • If you configure the interface for conditional trust on a voice device, only the legacy auto-QoS VoIP configuration is generated.

    • If you configure the interface for conditional trust on a video device, the enhanced auto-QoS configuration is generated.

    • If you configure the interface with classification or conditional trust based on the new interface auto-QoS commands, enhanced auto-QoS configuration is generated.

  • Auto-QoS migration happens after a new device is connected when the auto qos srnd4 global configuration command is enabled.


Note

If an interface previously configured with legacy auto-QoS migrates to enhanced auto-QoS, voice commands and configuration are updated to match the new global QoS commands.

Auto-QoS configuration migration from enhanced auto-QoS to legacy auto-QoS can occur only when you disable all existing auto-QoS configurations from the interface.

Auto-QoS Configuration Guidelines

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

  • After auto-QoS is enabled, do not modify a policy map that includes AutoQoS in its name. If you need to modify the policy map, make a copy of it, and change the copied policy map. 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.

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

  • By default, the CDP is enabled on all ports. For auto-QoS to function properly, do not disable CDP.

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.

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.

Effects of Auto-Qos Compact on Running Configuration

If auto-QoS compact is enabled:

  • Only the auto-QoS commands entered from the CLI are displayed in running-config.

  • The generated global and interface configurations are hidden.

  • When you save the configuration, only the auto-qos commands you have entered are saved (and not the hidden configuration).

  • When you reload the switch, the system detects and re-executes the saved auto-QoS commands and the AutoQoS SRND4.0 compliant config-set is generated .


Note

Do not make changes to the auto-QoS-generated commands when auto-QoS compact is enabled, because user-modifications are overridden when the switch reloads.

When auto-qos global compact is enabled:

  • show derived-config command can be used to view hidden AQC derived commands.

  • AQC commands will not be stored to memory. They will be regenerated every time the switch is reloaded.

  • When compaction is enabled, auto-qos generated commands should not be modified .

  • If the interface is configured with auto-QoS and if AQC needs to be disabled, auto-qos should be disabled at interface level first.

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.

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:


Device# configure terminal

Enters global configuration mode.

Step 2

interface interface-id

Example:


Device(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 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}

Example:

Device(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.

Note

 

To view a list of commands that are automatically generated by issuing one of the auto-QoS commands listed here, you need to be in debug mode. Refer to the Catalyst 2960-X Switch QoS Command Reference Guide, Cisco IOS Release 15.0(2)EX for examples of how to run the appropriate debug command to view a list of these commands.

Step 4

exit

Example:


Device(config-if)# exit

Returns to global configuration mode.

Step 5

interface interface-id

Example:


Device(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 6

auto qos trust

Example:


Device(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 7

end

Example:


Device(config-if)# end

Returns to privileged EXEC mode.

Step 8

show auto qos interface interface-id

Example:


Device# 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.

Enabling Auto-Qos Compact

To enable auto-Qos compact, enter this command:

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:


Device# configure terminal

Enters global configuration mode.

Step 2

auto qos global compact

Example:


Device(config)# auto qos global compact

Enables auto-Qos compact and generates (hidden) the global configurations for auto-QoS.

You can then enter the auto-QoS command you want to configure in the interface configuration mode and the interface commands that the system generates are also hidden.

To display the auto-QoS configuration that has been applied, use these the privileged EXEC commands:

  • show derived-config
  • show policy-map
  • show access-list
  • show class-map
  • show table-map
  • show auto-qos
  • show policy-map interface
  • show ip access-lists

These commands will have keyword "AutoQos- ".

What to do next

To disable auto-QoS compact, remove auto-Qos instances from all interfaces by entering the no form of the corresponding auto-QoS commands and then enter the no auto qos global compact global configuration command.

Troubleshooting Auto-QoS

To troubleshoot auto-QoS, use the debug auto qos privileged EXEC command. 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 . 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).

Monitoring Auto-QoS

Table 4. 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 | interface | maps | queue-set | stack-port | stack-qset ]

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

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 5. 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). 


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



Device(config)# mls qos
Device(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. 


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



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

Device(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. 


Device(config)# no mls qos srr-queue 
output dscp-map
Device(config)# mls qos srr-queue 
output dscp-map queue 1 threshold 3 
40 41 42 43 44 45 46 47








Device(config)# mls qos srr-queue 
output dscp-map queue 2 threshold 3 
24 25 26 27 28 29 30 31
Device(config)# mls qos srr-queue 
output dscp-map queue 2 threshold 3 
48 49 50 51 52 53 54 55
Device(config)# mls qos srr-queue 
output dscp-map queue 2 threshold 3 
56 57 58 59 60 61 62 63
Device(config)# mls qos srr-queue 
output dscp-map queue 3 threshold 3 
16 17 18 19 20 21 22 23
Device(config)# mls qos srr-queue 
output dscp-map queue 3 threshold 3 
32 33 34 35 36 37 38 39
Device(config)# mls qos srr-queue 
output dscp-map queue 4 threshold 1 8

Device(config)# mls qos srr-queue 
output dscp-map queue 4 threshold 2 9 
10 11 12 13 14 15
Device(config)# mls qos srr-queue 
output dscp-map queue 
4 threshold 3 0 1 2 3 4 5 6 7



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



Device(config)# mls qos srr-queue 
output dscp-map queue 3 threshold 3 0 
1 2 3 4 5 6 7



Device(config)# mls qos srr-queue 
output dscp-map queue 4 threshold 1 8 
9 11 13 15
Device(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. 


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



Device(config)# mls qos queue-set 
output 1 threshold 2 100 100 50 200
Device(config)# mls qos queue-set 
output 1 threshold 2 125 125 100 400
Device(config)# mls qos queue-set 
output 1 threshold 3 100 100 100 400
Device(config)# mls qos queue-set
output 1 threshold 4 60 150 50 200








Device(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 6. 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). 


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

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

 

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

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

 

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

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. 



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


Device(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). 


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


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

Examples: Auto-QoS Generated Configuration for VoIP Devices

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. 


Device(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. 


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


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

If you entered the auto qos voip cisco-phone command, the switch automatically creates class maps and policy maps. 


Device(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. 


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


Device(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:

    
Device(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). 


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


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

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


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

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


Device(config)# mls qos map policed-dscp 0 10 18 24 26 46 to 8
Device(config)# mls qos map cos-dscp 0 8 16 24 32 46 48 56
Device(config)# class-map match-all AUTOQOS_MULTIENHANCED_CONF_CLASS
Device(config-cmap)# match access-group name AUTOQOS-ACL-MULTIENHANCED-CONF
Device(config)# class-map match-all AUTOQOS_VOIP_DATA_CLASS
Device(config-cmap)# match ip dscp ef 
Device(config)# class-map match-all AUTOQOS_DEFAULT_CLASS
Device(config-cmap)# match access-group name AUTOQOS-ACL-DEFAULT
Device(config)# class-map match-all AUTOQOS_TRANSACTION_CLASS
Device(config-cmap)# match access-group name AUTOQOS-ACL-TRANSACTIONAL-DATA
Device(config)# class-map match-all AUTOQOS_VOIP_SIGNAL_CLASS
Device(config-cmap)# match ip dscp cs3
Device(config)# class-map match-all AUTOQOS_SIGNALING_CLASS
Device(config-cmap)# match access-group name AUTOQOS-ACL-SIGNALING
Device(config)# class-map match-all AUTOQOS_BULK_DATA_CLASS
Device(config-cmap)# match access-group name AUTOQOS-ACL-BULK-DATA
Device(config)# class-map match-all AUTOQOS_SCAVANGER_CLASS
Device(config-cmap)# match access-group name AUTOQOS-ACL-SCAVANGER

Device(config)# policy-map AUTOQOS-SRND4-SOFTPHONE-POLICY
Device(config-pmap)# class AUTOQOS_VOIP_DATA_CLASS
Device(config-pmap-c)# set dscp ef
Device(config-pmap-c)# police 128000 8000 exceed-action policed-dscp-transmit
Device(config-pmap)# class AUTOQOS_VOIP_SIGNAL_CLASS
Device(config-pmap-c)# set dscp cs3
Device(config-pmap-c)# police 32000 8000 exceed-action policed-dscp-transmit
Device(config-pmap)#class AUTOQOS_MULTIENHANCED_CONF_CLASS
Device(config-pmap-c)#set dscp af41
Device(config-pmap-c)# police 5000000 8000 exceed-action drop
Device(config-pmap)# class AUTOQOS_BULK_DATA_CLASS
Device(config-pmap-c)# set dscp af11
Device(config-pmap-c)# police 10000000 8000 exceed-action policed-dscp-transmit
Device(config-pmap)# class AUTOQOS_TRANSACTION_CLASS
Device(config-pmap-c)# set dscp af21
Device(config-pmap-c)# police 10000000 8000 exceed-action policed-dscp-transmit
Device(config-pmap)# class AUTOQOS_SCAVANGER_CLASS
Device(config-pmap-c)# set dscp cs1
Device(config-pmap-c)# police 10000000 8000 exceed-action drop
Device(config-pmap)# class AUTOQOS_SIGNALING_CLASS
Device(config-pmap-c)# set dscp cs3
Device(config-pmap-c)# police 32000 8000 exceed-action drop
Device(config-pmap)# class AUTOQOS_DEFAULT_CLASS
Device(config-pmap-c)# set dscp default
;
Device(config-if)# service-policy input AUTOQOS-SRND4-SOFTPHONE-POLICY

auto qos global compact

The following is an example of the auto qos global compact command. 


Device# configure terminal
Device(config)# auto qos global compact
Device(config)# interface GigabitEthernet1/2
Device(config-if)# auto qos voip cisco-phone

Device# show auto-qos

GigabitEthernet1/2
auto qos voip cisco-phone

Device# show running-config interface GigabitEthernet 1/0/2

interface GigabitEthernet1/0/2
auto qos voip cisco-phone
end

Where to Go Next for Auto-QoS

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

Additional References for Auto-QoS

Related Documents

Related Topic Document Title

For complete syntax and usage information for the commands used in this chapter.

Cisco IOS Quality of Service Solutions Command Reference

Error Message Decoder

Description Link

To help you research and resolve system error messages in this release, use the Error Message Decoder tool.

https://www.cisco.com/cgi-bin/Support/Errordecoder/index.cgi

Standards and RFCs

Standard/RFC Title

—

MIBs

MIB MIBs Link

All the supported MIBs for this release.

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

Technical Assistance

Description Link

The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

http://www.cisco.com/support

Feature History and Information for Auto-QoS

Release

Modification

Cisco IOS Release 15.0(2)EX

This feature was introduced.