Cisco Nexus 5000 Series Command Reference
Cisco Nexus 5000 Series Quality of Service Commands
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Table Of Contents

Cisco Nexus 5000 Series Quality of Service Commands

class-map

match cos

policy-map

service-policy

system jumbomtu

system qos

priority-flow-control

show class-map

show policy-map

show system qos

show interface priority-flow-control

show policy-map interface


Cisco Nexus 5000 Series Quality of Service Commands

This chapter describes the Cisco NX-OS quality of service commands available on Cisco Nexus 5000 Series switches.

class-map

To create or modify a class map and enter the class-map configuration mode, use the class-map command. To remove a class map, use the no form of this command.

class-map class-map-name

no class-map class-map-name

Syntax Description

class-map-name

Name assigned to the class map. The name class default is reserved.


Command Default

None.

Command Modes

Global configuration.

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

You can define a class map for each class of traffic to be used in QoS policies.

No license required for this command.

Examples

This example shows how to create or modify a class map: 

switch(config)# class-map my_class1

switch(config-cmap)#

This example shows how to remove a class map: 

switch(config)# no class-map my_class1

switch(config)#

Related Commands

Command
Description

policy-map

Creates or modifies a policy map.

show class-map

Displays class maps.


match cos

To define a traffic class based on the Class of Service (CoS) value in the 802.1Q, use the match cos command. To remove the match cos configuration, use the no form of this command.

match cos multi-range-cos-values

no match cos multi-range-cos-values

Syntax Description

multi-range-cos-values

Specifies a list of multiple ranges of Class of Service (CoS) values. Values can range from 1 to 7.


Command Default

None.

Command Modes

Class-map configuration.

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

You can create a traffic class based on CoS values in the 802.1Q or ISL header.

No license required for this command.

Examples

This example shows how to create a match on CoS: 

switch(config)# class-map class_cos

switch(config-cmap)# match cos 2, 5-6

This example shows how to remove the match on CoS: 

switch(config)# class-map class_cos

switch(config-cmap)# no match cos 2, 5-6

Related Commands

Command
Description

class-map

Creates or modifies a class map.

show class-map

Displays class maps.


policy-map

To create or modify a policy map and enter the policy-map configuration mode, use the policy-map command. To remove a policy map, use the no form of this command.

policy-map name

no policy-map name

Syntax Description

name

Name assigned to the policy map.


Command Default

None.

Command Modes

Global configuration.

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

You can create a policy map based on class maps to define QoS actions to perform on packets.

You can configure the class in a policy-map and apply parameters. This example shows the parameters you can apply:

switch(config)# policy-map my_policy1 

switch(config-pmap)# ?

class  Policy Criteria

switch(config-pmap)# class class1

switch(config-pmap-c)# ?

bandwidth  Specify bandwidth for the class

mtu        Configure the system class MTU

pause      Configure pause behavior

priority   Configure traffic class priority

Use the service-policy command to assign policy maps to interfaces or a system.

No license required for this command.

Examples

This example shows how to create or modify a policy map: 

switch(config)# policy-map my_policy1

switch(config-pmap)# class class1

switch(config-pmap-c)# mtu 9216

This example shows how to remove a policy map: 

switch(config)# no policy-map my_policy1

Related Commands

Command
Description

class-map

Creates or modifies a table map.

service-policy

Attaches a policy map to an interface.

show policy-map

Displays policy maps.


service-policy

To associate the system class policy-map to the service policy for the system, use the service-policy command.

service-policy [policy-map-name]

no service-policy

To associate the system class policy-map to the interface, use the service-policy command.

service-policy output [policy-map-name]

no service-policy output

Syntax Description

policy-map-name

Name of the policy map to attach to this interface or system policy. Only one policy map can be attached to the input and one to the output of a given interface.


Command Default

No QoS policies are active on an interface until the service-policy command is entered.

Command Modes

Interface configuration

System qos

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

No license required for the command.

Examples

This example shows how to attach policy maps to to use as the service policy for the system.: 

switch# configure terminal 

switch(config)# mtu 9216

switch(config)# system qos

switch(config-sys-qos)# service-policy policy-map1

The following example shows how to attach a policy map to an interface: 

switch(config)# class-map best-effort-drop-class

switch(config-cmap)# match cos 5

switch(config)# policy-map policy_map1

switch(config-pmap)# class best-effort-drop-class

switch(config-pmap-c)# mtu 9216

switch(config)# interface eth1/1

switch(config-if)# service-policy output policy_map1

Related Commands

Command
Description

class-map

Creates or modifies a class map.

policy-map

Creates or modifies a policy map.

show policy-map

Displays policy maps.


system jumbomtu

To define the upper bound of any MTU in the system, use the system jumbomtu command.

system jumbomtu [value]

Syntax Description

value

The jumbomtu value. The range is 2240-9216.


Command Default

9216 bytes

Command Modes

Global configuration

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

No license required for this command.

Examples

This example shows how to define the upper bound of any MTU in the system: 

switch(config)# system jumbomtu 9216

system qos

To configure system policy or set multicast-cos option, use the system qos command.

system qos

Syntax Description

None.

Command Default

None.

Command Modes

Global configuration

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

No license required for the command.

Examples

This example shows how to configure a system qos: 

switch# configure terminal 

switch(config)# system qos

switch(config-sys-qos)# service-policy policy-map1

Related Commands

Command
Description

service- policy

Associates the system class policy-map to the service policy for the system

set multicast-cos

Sets the Class of Service (CoS) value associated with the multicast system class.


priority-flow-control

To set the (priority-flow-control) PFC mode for the selected interface, use the priority-flow-control command.

priority-flow-control mode {auto | on}

Syntax Description

auto

Negotiates PFC capability.

on

Force-enables PFC.


Command Default

None.

Command Modes

Global configuration.

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

No license required for the command.

Examples

This example shows how to force-enable PFC on an interface: 

switch# configure terminal

switch(config)# interface ethernet 1/2

switch(config-if)# priority-flow-control mode on

show class-map

To display class maps, use the show class-map command.

show class-map [name]

Syntax Description

name

(Optional) Specifies the class map to display.


Command Default

None.

Command Modes

Global configuration.

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

You can display all class maps if a name is not specified. Otherwise, the class map specified is displayed.
No license required for the command.

Examples

This example shows how to display a class map: 

switch# show class-map my_class_map

Related Commands

Command
Description

class-map

Creates or modifies a class map.


show policy-map

To display policy maps, use the show policy-map command.

show policy-map [name]

Syntax Description

name

(Optional) Specifies the policy-map name to display.


Command Default

None.

Command Modes

Global configuration.

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

You can display all policy maps if a name is not specified. Otherwise, the policy map specified is displayed.

No license required for this command.

Examples

This example shows how to display a policy map: 

switch# show policy-map my_policy_map

Related Commands

Command
Description

class-map

Creates or modifies a class map.

policy-map

Creates or modifies a policy map.


show system qos

To display system QoS information, use the show system qos command.

show system qos

Syntax Description

None.

Command Default

None.

Command Modes

Global configuration.

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

No license required for the command.

Examples

This example shows how to display system QoS information: 

switch(config)# show system qos

Related Commands

Command
Description

system qos

Configures the system class QoS.


show interface priority-flow-control

To display the priority flow control details for a specified interface, use the show interface priority-flow-control command.

show interface [name] priority-flow-control

Syntax Description

name

(Optional) Name of the interface.


Command Default

None.

Command Modes

Global configuration.

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

No license required for the command.

Examples

This example shows how to display the priority flow control details for a specified interface: 

switch(config)# show interface ethernet 1/1 priority-flow-control 

---------------------------------------

Port       Mode Oper RxPPP      TxPPP     

---------------------------------------

Eth1/1     auto off  0          0

The interface specified is Eth1/1, the PFC mode is set to negotiate PFC capability, the operation is off and packets transmitted is zero.

Related Commands

Command
Description

priority-flow-control

Sets the PFC mode for the selected interface.


show policy-map interface

To display the system policy configured on the system and per class statistics, use the show policy-map interface command.

show policy-map interface [name]

Syntax Description

name

(Optional) Name of the interface.


Command Default

None.

Command Modes

Global configuration.

Command History

Release
Modification

4.0(0)N1(1a)

This command was introduced.


Usage Guidelines

This command provides per class statistics.

No license required for the command.

Examples

This example shows the per class pause statistics displayed for a default system class: 

switch(config)# show policy-map interface ethernet 3/1

Related Commands

Command
Description

policy-map

Creates or modifies a policy map.

show policy-map

Displays policy maps.