Enable-NetQosFlowControl

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

Syntax

Enable-NetQosFlowControl
      [-AsJob]
      [-CimSession <CimSession[]>]
      [-Confirm]
      -InputObject <CimInstance[]>
      [-PassThru]
      [-ThrottleLimit <Int32>]
      [-WhatIf]
      [<CommonParameters>]
Enable-NetQosFlowControl
      [[-Priority] <Byte[]>]
      [[-InterfaceAlias] <String>]
      [-AsJob]
      [-CimSession <CimSession[]>]
      [-Confirm]
      [-PassThru]
      [-ThrottleLimit <Int32>]
      [-WhatIf]
      [<CommonParameters>]
Enable-NetQosFlowControl
      [[-Priority] <Byte[]>]
      [[-InterfaceIndex] <UInt32>]
      [-AsJob]
      [-CimSession <CimSession[]>]
      [-Confirm]
      [-PassThru]
      [-ThrottleLimit <Int32>]
      [-WhatIf]
      [<CommonParameters>]

Description

The Enable-NetQosFlowControl cmdlet enables priority-based flow control (PFC) in Windows ServerĀ® 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 programs DCB capable NICs, which enables PFC at the link level.

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

Enabling flow control on both ends of a link reduces the chance of packet loss because of link congestion. Some upper layer protocol even assumes a lossless underlying protocol. In such case, make sure that you 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 very important 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: Enable flow control for traffic by priority

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

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

Required Parameters

-InputObject

Specifies the input to this cmdlet. You can use this parameter, or you can pipe the input to this cmdlet.

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

Optional Parameters

-AsJob

Runs the cmdlet as a background job. Use this parameter to run commands that take a long time to complete.

The cmdlet immediately returns an object that represents the job and then displays the command prompt. You can continue to work in the session while the job completes. To manage the job, use the *-Job cmdlets. To get the job results, use the Receive-Job cmdlet.

For more information about Windows PowerShell background jobs, see about_Jobs.

Type:SwitchParameter
Position:Named
Default value:None
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-CimSession or Get-CimSession cmdlet. The default is the current session on the local computer.

Type:CimSession[]
Aliases:Session
Position:Named
Default value:None
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
Accept pipeline input:False
Accept wildcard characters:False
-InterfaceAlias
Type:String
Aliases:IfAlias
Position:1
Default value:None
Accept pipeline input:True (ByPropertyName)
Accept wildcard characters:False
-InterfaceIndex
Type:UInt32
Aliases:IfIndex
Position:1
Default value:None
Accept pipeline input:True (ByPropertyName)
Accept wildcard characters:False
-PassThru
Type:SwitchParameter
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-Priority
Type:Byte[]
Position:0
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-ThrottleLimit
Type:Int32
Position:Named
Default value:None
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
Accept pipeline input:False
Accept wildcard characters:False

Inputs

Microsoft.Management.Infrastructure.CimInstance#ROOT/StandardCimv2/MSFT_NetQosFlowControlSettingData[]

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. You can pipe a MSFT_NetQosFlowControlSettingData object that contains the follow control setting per priority to this cmdlet.

Outputs

Microsoft.Management.Infrastructure.CimInstance#ROOT/StandardCimv2/MSFT_NetQosFlowControlSettingData

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. This cmdlet returns a MSFT_NetQosFlowControlSettingData object that contains flow control settings per priority. Only if you specify the PassThru parameter does this cmdlet return the MSFT_NetQosFlowControlSettingData object.