Edit

Enable-NetQosFlowControl

  • Reference
Module:
DcbQoS

Enables link level flow control based on the IEEE 802.1p priority.

Syntax

Enable-NetQosFlowControl
      [[-Priority] <Byte[]>]
      [-PassThru]
      [-CimSession <CimSession[]>]
      [-ThrottleLimit <Int32>]
      [-AsJob]
      [-WhatIf]
      [-Confirm]
      [<CommonParameters>]
Enable-NetQosFlowControl
      -InputObject <CimInstance[]>
      [-PassThru]
      [-CimSession <CimSession[]>]
      [-ThrottleLimit <Int32>]
      [-AsJob]
      [-WhatIf]
      [-Confirm]
      [<CommonParameters>]

Description

The Enable-NetQosFlowControl cmdlet enables priority-based flow control (PFC) in Windows Server® 2012 and later. PFC is part of the IEEE data center bridging (DCB) standard. If Windows Server 2012 or later is configured to be not willing to accept configurations from a remote device, Windows Server 2012 or later will program DCB capable NICs, which will enable PFC at the link level.

For more information on remote device configurations, see the Set-NetQosDcbxSetting cmdlet.

Enabling flow control on both ends of a link reduces the chance of packet loss due to link congestion. Some upper layer protocol even assumes a lossless underlying protocol. In such case, it is essential to enable flow control. PFC makes it possible to enable flow control just for one type of traffic, denoted by the IEEE 802.1p priority. It is critical to have consistent PFC settings on both ends of the link. A mis-matched configuration is equivalent to not having flow control at all.

Examples

EXAMPLE 1

PS C:\> Enable-NetQosFlowControl -Priority 3,6

This example enables flow control on traffic tagged with priority 3 and priority 6.

Parameters

-AsJob

ps_cimcommon_asjob

Type:SwitchParameter
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-CimSession

Runs the cmdlet in a remote session or on a remote computer. Enter a computer name or a session object, such as the output of a New-CimSessionhttp://go.microsoft.com/fwlink/p/?LinkId=227967 or Get-CimSessionhttp://go.microsoft.com/fwlink/p/?LinkId=227966 cmdlet. The default is the current session on the local computer.

Type:CimSession[]
Aliases:Session
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-Confirm

Prompts you for confirmation before running the cmdlet.

Type:SwitchParameter
Aliases:cf
Position:Named
Default value:False
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-InputObject

Specified the object which will be modified by this cmdlet. The object must be piped to the cmdlet.

Type:CimInstance[]
Position:Named
Default value:None
Required:True
Accept pipeline input:True
Accept wildcard characters:False

-PassThru

Returns an object representing the item with which you are working. By default, this cmdlet does not generate any output.

Type:SwitchParameter
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-Priority

Specifies the IEEE 802.1p priority value.

Type:Byte[]
Position:0
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-ThrottleLimit

Specifies the maximum number of concurrent operations that can be established to run the cmdlet. If this parameter is omitted or a value of 0 is entered, then Windows PowerShell® calculates an optimum throttle limit for the cmdlet based on the number of CIM cmdlets that are running on the computer. The throttle limit applies only to the current cmdlet, not to the session or to the computer.

Type:Int32
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-WhatIf

Shows what would happen if the cmdlet runs. The cmdlet is not run.

Type:SwitchParameter
Aliases:wi
Position:Named
Default value:False
Required:False
Accept pipeline input:False
Accept wildcard characters:False

Inputs

CimInstance[]

The Microsoft.Management.Infrastructure.CimInstance object is a wrapper class that displays Windows Management Instrumentation (WMI) objects. The path after the pound sign (#) provides the namespace and class name for the underlying WMI object.

The MSFT_NetQosFlowControlSettingData object contains the follow control setting per priority.

Outputs

CimInstance

The Microsoft.Management.Infrastructure.CimInstance object is a wrapper class that displays Windows Management Instrumentation (WMI) objects. The path after the pound sign (#) provides the namespace and class name for the underlying WMI object.

The MSFT_NetQosFlowControlSettingData object contains flow control settings per priority. Only when the PassThru parameter is specified will this cmdlet return the MSFT_NetQosFlowControlSettingData object.