Table Of Contents
Q Commands
qos class-map
qos control priority
qos enable
qos dwrr-q
qos policy-map
qos service
quiesce
Q Commands
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
•qos control priority
•qos enable
•qos dwrr-q
•qos dwrr-q
•qos policy-map
•qos service
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)# qos class-map MyClass1
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)# 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)# 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)# 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 -->
class class-name -->
dscp dscp-value
priority {high | low | medium}
no qos policy-map policy-name -->
no class class-name -->
no dscp dscp-value
no priority {high | low | medium}
Syntax Description
qos policy-map policy-name
|
Specifies a policy map name. Maximum length is 63 alpha-numeric characters.
|
class class-name
|
Enters the submode for a pre-defined class policy.
|
dscp dscp-value
|
Enters the Differentiated Services Code Point (DSCP) classification for the selected class map.
|
priority
|
Configures the priority to match frames.
|
high
|
Assigns frames matching the class-map to get high priority.
|
low
|
Assigns frames matching the class-map to get low priority.
|
medium
|
Assigns frames matching the class-map to get medium priority.
|
Defaults
The default DSCP value is 0.
The default priority is low.
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.
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
The following example deletes the policy map called OldPolicy and places you in the policy-map submode.
switch(config)# no qos policy-map OldPolicy
The following example specifies the name of a predefined class and places you at the policy-map submode for that class.
switch(config-pmap)# class MyClass
The following example exits the policy-map submode for this class.
switch(config-pmap)# no class OldClass
The following example specifies the DSCP value to mark each frame matching this class.
switch(config-pmap-c)# dscp 2
Operation in progress. Please check class-map parameters
The following example deletes a previously-assigned DSCP value.
switch(config-pmap-c)# no dscp 60
Related Commands
Command
|
Description
|
show qos
|
Displays configured QoS information.
|
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 shutdown 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
This command was introduced in Cisco MDS SAN-OS Release 1.3(1).
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.
|