H Commands

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

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

6.0(2)N1(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

6.0(2)N1(1)

This command was introduced.

 
Usage Guidelines

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.