H Commands

This chapter describes the Cisco NX-OS multicast routing commands that begin with H.

hardware fabric flow-control multicast

To enable the Cisco Nexus 7000 Series switch to handle multicast traffic more efficiently in microbursting environments, use the hardware fabric flow-control multicast command. To disable this feature, use the no form of this command.

hardware fabric flow-control multicast [all-modules | forced | module module-number]

no sampler hardware fabric flow-control multicast [all-modules | forced | module module-number]

 
Syntax Description

all-modules

(Optional) Specifies the fabric flow-control on all modules.

forced

(Optional) Specifies the fabric flow-control mandatorily.

module

(Optional) Specifies the fabric flow-control to individual module(s).

module-number

Specifies module number. The range is from 1 to 18.

 
Defaults

None.

 
Command Modes

Global configuration

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.2(1)

This command was introduced.

 
Usage Guidelines

None.

This command does not require a license.

Examples

This example shows how to configure fabric flow control on all modules:

switch(config)# hardware fabric flow-control multicast all-modules forced
switch(config)#
 

 
Related Commands

Command
Description

show system internal xbar fabric-flow-control-info

Displays the hardware information.

hardware forwarding shim

To enable the hardware forwarding shim header knob, use the hardware forwarding shim command. To disable this feature, use the no form of this command.

hardware forwarding shim

no hardware forwarding shim

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

None.

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

6.2(2)

This command was introduced.

 
Usage Guidelines

None.

This command does not require a license.

Examples

This example shows how to enable the hardware forwarding shim:

switch# config t
switch(config)# hardware forwarding shim
Disabling shim knob on vdc 1
switch(config)#
 

 
Related Commands

Command
Description

show system internal xbar fabric-flow-control-info

Displays the hardware information.

hardware proxy layer-3 replication rebalance-mode

To configure the hardware proxy Layer 3 multicast balance mode for replication, use the hardware proxy layer-3 replication rebalance-mode command. To disable this feature, use the no form of this command.

hardware proxy layer-3 replication rebalance-mode { auto | manual }

no hardware proxy layer-3 replication rebalance-mode { auto | manual }

 
Syntax Description

auto

Specifies to automatically rebalance VLAN interfaces on available replicators.

manual

Specifies to manually rebalance VLAN interfaces on available replicators using the command-line interface (CLI).

 
Defaults

Manual

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.1(1)

This command was introduced.

 
Usage Guidelines

This command applies only to the Cisco Nexus 7000 Series chassis that contains an F1 Series module or an M1 Series module. This command applies when you are using either a FabricPath or Ethernet interface.

Note The system automatically balances all Layer 3 routing traffic among the available proxy routing interfaces on the M Series modules in the chassis.

This command does not require a license.

Examples

This example shows how to automatically rebalance VLAN interfaces on available replicators:

switch(config)# hardware proxy layer-3 replication rebalance-mode auto

switch(config)#
 

This example shows how to manually rebalance VLAN interfaces on available replicators using the CLI:

switch(config)# hardware proxy layer-3 replication rebalance-mode manual

switch(config)#
 

 
Related Commands

Command
Description

show hardware proxy layer-3 detail

Displays detailed information on the proxy Layer 3 functionality.

hardware proxy layer-3 replication

To configure specific modules and physical interfaces on the N7K-M Series module to provide the proxy routing for egress replication of Layer 3 multicast packets on the N7K-F Series module, use the hardware proxy layer-3 replication command. To delete the user configuration and to use all M-series modules in the virtual device context (VDC) for egress replication, use the no form of this command.

hardware proxy layer-3 replication {exclude | use} {interface ethernet slot/port | module slot-number} [module-type f1]

no hardware proxy layer-3 replication

 
Syntax Description

exclude

Specifies all available members.

use

Specifies members.

interface

Specifies interfaces.

ethernet

Specifies the ethernet interface.

slot/port

Slot or port number. The range is from 1 to 253.

module

Specifies modules.

slot-number

Slot number. The range is from 1 to 18.

module-type f1

(Optional) Specifies the type of modules to perform proxy Layer 3 replication.

 
Defaults

None

 
Command Modes

Global configuration mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.1(1)

This command was introduced.

 
Usage Guidelines

This command applies only to the Cisco Nexus 7000 Series chassis that contains an F1 Series module or an M1 Series module. This command applies when you are using either a FabricPath or Ethernet interface.

This command does not require a license.

Examples

The example shows how to configure a service group timeout in seconds:

switch(config)# hardware proxy layer-3 replication exclude interface ethernet 2/1-16, ethernet 3/1, ethernet 4/1-2

switch(config)#

 
Related Commands

Command
Description

show hardware proxy layer-3 detail

Displays detailed information on the proxy Layer 3 functionality.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

hardware proxy layer-3 replication trigger rebalance

To trigger one-time load balancing among all the proxy routing multicast replication interfaces, use the hardware proxy layer-3 replication trigger rebalance command.

hardware proxy layer-3 replication trigger rebalance

 
Syntax Description

This command has no arguments or keywords.

 
Defaults

Manual

 
Command Modes

EXEC mode

 
Supported User Roles

network-admin
vdc-admin

 
Command History

Release
Modification

5.1(1)

This command was introduced.

 
Usage Guidelines

This command applies only to the Cisco Nexus 7000 Series chassis that contains an F1 Series module or an M1 Series module. This command applies when you are using either a FabricPath or Ethernet interface.

This command does not require a license.

Examples

This example shows how to configure load balancing among the proxy routing replication interfaces:

switch# hardware proxy layer-3 replication trigger rebalance

switch#

 
Related Commands

Command
Description

show hardware proxy layer-3 detail

Displays detailed information on the proxy Layer 3 functionality.