Table Of Contents

H Commands

hardware multicast disable-slow-port-pruning

hardware profile tcam feature interface-qos limit

hardware unicast voq-limit

H Commands

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This chapter describes the Cisco NX-OS quality of service (QoS) commands that begin with H.

hardware multicast disable-slow-port-pruning

To disable slow port pruning on multicast packets, use the hardware multicast disable-slow-port-pruning command. To enable show port pruning, use the no form of this command.

hardware multicast disable-slow-port-pruning

no hardware multicast disable-slow-port-pruning

Syntax Description

This command has no arguments or keywords.

Command Default

Enabled

Command Modes

Global configuration mode

Command History

Release	Modification
5.0(2)N1(1)	This command was introduced.

Usage Guidelines

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Note This command is applicable to only Cisco Nexus 5548 switches.

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Examples

This example shows how to disable slow port pruning for multicast packets on a switch:

switch(config)# hardware multicast disable-slow-port-pruning 

switch(config)#

Related Commands

Command	Description
hardware unicast voq-limit	Enables the VOQ limit.
show running-config	Displays the running configuration on a switch.

hardware profile tcam feature interface-qos limit

To configure the QoS TCAM limit, use the hardware profile tcam feature interface-qos limit command.

hardware profile tcam feature interface-qos limit tcam-size

Syntax Description

tcam-size

Interface QoS TCAM limit. The TCAM size can be from 7- 446 entries.

Command Default

None

Command Modes

Global configuration mode

Command History

Release	Modification
5.1(3)N2(1)	This command was introduced.

Usage Guidelines

No interface policy entry should be present after the interface_qos limit in the QoS region of any TCAM.

Examples

This example shows how to set the interface QoS TCAM limit to 20 entries:

switch(config)# configue terminal

switch(config)# hardware profile tcam feature interface-qos limit 20

switch(config)# show hardware profile tcam feature qos

Feature 	 						Limit

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

Interface							20

vlan-qos + global-qos					 		428

switch(config)# copy running-config startup-config

Related Commands

Command	Description
show hardware profile tcam feature qos	Displays the limits of the QoS TCAMs.

hardware unicast voq-limit

To enable the virtual output queuing (VOQ) limit for unicast traffic on a switch, use the hardware unicast voq-limit command. To disable the VOQ limit, use the no form of this command.

hardware unicast voq-limit

no hardware unicast voq-limit

Syntax Description

This command has no arguments or keywords.

Command Default

Disabled

Command Modes

Global configuration mode

Command History

Release	Modification
5.0(2)N1(1)	This command was introduced.

Usage Guidelines

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Note This command is applicable to only Cisco Nexus 5548 switches.

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To alleviate congestion and blocking, you can use virtual output queuing (VOQ) to prevent one blocked receiver from affecting traffic that is being sent to other noncongested receivers (head-of-line blocking).

Examples

This example shows how to enable the VOQ limits for unicast packets on a switch:

switch(config)# hardware unicast voq-limit 

switch(config)#

Related Commands

Command	Description
hardware multicast disable-slow-port-pruning	Disables slow port pruning on the switch.
show running-config	Displays the running configuration on a switch.