Table Of Contents

Q Commands

qos class-map

qos control priority

qos enable

qos dwrr-q

qos policy-map

qos priority

qos service

quiesce

Q Commands

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The commands in this chapter apply to the Cisco MDS 9000 Family of multilayer directors and fabric switches. All commands are shown here in alphabetical order regardless of command mode. See the "Command Modes" section to determine the appropriate mode for each command. For more information, refer to the Cisco MDS 9000 Family Configuration Guide.

qos class-map

To create and define a traffic class with match criteria that will be used to identify traffic, use the qos class-map command in configuration mode. To remove a previously-configured class, use the no form of the command.

qos class-map class [match-all | match-any]

no qos class-map class

Syntax Description

class-name	Specifies a class map name. Maximum length is 63 alpha-numeric characters.
match-all	Specifies a logical AND operator for all matching statements in this class. (default).
match-any	Specifies a logical OR operator for all matching statements in this class.

Defaults

match-all

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.0(2).

Usage Guidelines

You can access this command only if you enable the QoS data traffic feature using the qos enable command.

Examples

The following example shows how to create a QoS class map and enter class map configuration mode.

switch# config terminal

switch(config)# qos class-map MyClass1

switch(config-cmap)# 

Related Commands

Command	Description
show qos	Displays configured QoS information.

qos control priority

To enable the QoS priority assignment for control traffic feature on the Cisco MDS 9000 family of switches, use the qos control command in configuration mode. To revert to the factory default, use the no form of the command.

qos control priority 0

no qos priority control 0

Syntax Description

0	Specifies the lowest priority. To revert to the highest priority, use the no form of the command.

Defaults

Enabled and priority 7 are the defaults.

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.0(2).

Usage Guidelines

None.

Examples

The following example sets the QoS priority assignment to the highest level.

switch# config terminal

switch(config)# no qos control priority 0

Related Commands

Command	Description
show qos	Displays configured QoS information.

qos enable

To enable the QoS priority assignment for data traffic feature on the Cisco MDS 9000 family of switches, use the qos enable command in configuration mode. To disable the QoS priority assignment for control traffic feature, use the no form of the command.

qos enable

no qos enable

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled.

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.3(1).

Usage Guidelines

None.

Examples

The following example disables the QoS priority assignment feature.

switch# config terminal

switch(config)# qos enable

Related Commands

Command	Description
show qos	Displays configured QoS information.

qos dwrr-q

To associate a weight with a deficit weighted round robin (DWRR) scheduler queue, use the qos dwrr-q command in configuration mode. To remove a previously-configured class, use the no form of the command.

qos dwrr-q {high | low | medium} weight value

no qos dwrr-q {high | low | medium} weight value

Syntax Description

high	Assigns the DWRR queue high option to DWRR queues.
low	Assigns the DWRR queue low option to DWRR queues.
medium	Assigns the DWRR queue medium option to DWRR queues.
weight value	Specifies DWRR queue weight

Defaults

10

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.3(1).

Usage Guidelines

You can access this command only if you enable the QoS data traffic feature using the qos enable command.

Examples

The following example specifies the DWRR queue priority.

switch# config terminal

switch(config)# qos dwrr-q high weight 50

The following example reverts to the default value of 10.

switch(config)# no qos dwrr-q high weight 50

Related Commands

Command	Description
show qos	Displays configured QoS information.

qos policy-map

To specify the class of service, use the qos policy-map command in configuration mode. To remove a previously configured class, use the no form of the command.

qos policy-map policy-name

no qos policy-map policy-name

Syntax Description

policy-name

Specifies a policy map name. Maximum length is 63 alphanumeric characters.

Defaults

Disabled.

Command Modes

Configuration mode.

Command History

Release	Modification
1.3(1)	This command was introduced.

Usage Guidelines

You can access this command only if you enable the QoS data traffic feature using the qos enable command.

As an alternative, you can map a classmap to a Differentiated Services Code Point (DSCP).The DSCP is an indicator of the service level for a specified frame. The DSCP value ranges from 0 to 63. A dscp value of 46 is disallowed.

Examples

The following example creates a policy map called MyPolicy and places you in the policy-map submode.

switch(config)# qos policy-map MyPolicy

switch(config-pmap)#

Related Commands

Command	Description
qos enable	Enables the QoS data traffic feature on the switch.
show qos	Displays configured QoS information.

qos priority

To configure the quality of server (QoS) priority attribute in a zone attribute group, use the qos priority command in zone attribute configuration submode. To revert to the default, use the no form of the command.

qos priority {high | low | medium}

no qos priority {high | low | medium}

Syntax Description

high	Specifies high priority.
low	Specifies low priority.
medium	Specifies medium priority.

Defaults

Low.

Command Modes

Zone attribute configuration submode.

Command History

Release	Modification
2.0(1b)	This command was introduced.

Usage Guidelines

None.

Examples

The following example shows how to set the QoS priority attribute for a zone attribute group.

switch# config terminal

switch(config)# zone-attribute-group name admin-attributes vsan 10

switch(config-attribute-group)# qos priority medium

Related Commands

Command	Description
show zone-attribute-group	Displays zone attribute group information.
zone-attribute-group name	Configures zone attribute groups.

qos service

To apply a service policy, use the qos service command in configuration mode. To remove a previously-configured class, use the no form of the command.

qos service policy policy-name vsan vsan-id

no qos service policy policy-name vsan vsan-id

Syntax Description

policy policy-name	Associates a policy map with the VSAN.
vsan vsan-id	Specifies the VSAN ID. The range is 1 to 4093.

Defaults

None.

Command Modes

Configuration mode.

Command History

This command was introduced in Cisco MDS SAN-OS Release 1.3(1).

Usage Guidelines

You can access this command only if you enable the QoS data traffic feature using the qos enable command.

Examples

The following example applies a configured policy to VSAN 3.

switch(config)# qos service policy MyPolicy vsan 3

Operation in progress. Please check policy-map parameters	

The following example deletes a configured policy that was applied to VSAN 7.

switch(config)# no qos service policy OldPolicy vsan 7

Operation in progress. Please check policy-map parameters	 

Related Commands

Command	Description
show qos	Displays configured QoS information.

quiesce

To gracefully shut down an ISL in a PortChannel, use the quiesce command in configuration mode. To disable this feature, use the no form of the command.

quiesce interface fc slot/port

no queisce interface fc slot/port

Syntax Description

interface fc slot/port

Specifies the interface to be quiesced.

Defaults

None.

Command Modes

EXEC mode.

Command History

Release	Modification
1.3(1)	This command was introduced.
2.0(2b)	This command was deprecated and the functionality integrated into the shutdown command.

Usage Guidelines

The following conditions return an error:

•The interface is not part of port-channel

•The interface is not up

•The interface is the last operational interface in the PortChannel

Examples

The following example gracefully shuts down the one end of the ISL link in a PortChannel.

switchA# quiesce interface fc 2/1

WARNING: this command will stop forwarding frames to the specified interfaces. It is 
intended to be used to gracefully shutdown interfaces in a port-channel. The procedure is:

1. quiesce the interfaces on both switches.

2. shutdown the interfaces administratively.

Do you want to continue? (y/n)  [n] y

Related Commands

Command	Description
show interface	Displays interface configuration and status information.