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Disable-NetAdapterSriov

  • Reference
Module:
NetAdapter

Disables SR-IOV on a network adapter.

Syntax

Disable-NetAdapterSriov
       [-Name] <String[]>
       [-IncludeHidden]
       [-NoRestart]
       [-PassThru]
       [-CimSession <CimSession[]>]
       [-ThrottleLimit <Int32>]
       [-AsJob]
       [-WhatIf]
       [-Confirm]
       [<CommonParameters>]
Disable-NetAdapterSriov
       -InterfaceDescription <String[]>
       [-IncludeHidden]
       [-NoRestart]
       [-PassThru]
       [-CimSession <CimSession[]>]
       [-ThrottleLimit <Int32>]
       [-AsJob]
       [-WhatIf]
       [-Confirm]
       [<CommonParameters>]
Disable-NetAdapterSriov
       -InputObject <CimInstance[]>
       [-NoRestart]
       [-PassThru]
       [-CimSession <CimSession[]>]
       [-ThrottleLimit <Int32>]
       [-AsJob]
       [-WhatIf]
       [-Confirm]
       [<CommonParameters>]

Description

The Disable-NetAdapterSriov cmdlet disables Single-Root I/O Virtualization (SR-IOV) on a network adapter. SR-IOV enables network traffic to bypass the software switch layer of the Hyper-V virtualization stack. As a result, the I/O overhead in the software emulation layer is reduced and can achieve network performance that is nearly the same performance as in non-virtualized environments.

This cmdlet prevents the adapter from using SR-IOV until enabled again. While SR-IOV is disabled, Windows Server® 2012 and later does not attempt to allocate a virtual function to a virtual machine . If virtual functions from this network adapter are allocated to any virtual machine, then the virtual functions are revoked and each virtual machine interface reverted to the synthetic network path.

Examples

Example 1: Disable SR-IOV on the specified network adapter

PS C:\> Disable-NetAdapterSriov -Name "Ethernet 1"

This command disables SR-IOV on the network adapter named Ethernet 1 and restarts the network adapter.

Example 2: Disable SR-IOV on the specified network adapter

PS C:\> $NetAdapter2 = Get-NetAdapter -Name "Ethernet 2"
Disable-NetAdapterSriov -InputObject $NetAdapter2

A version of the cmdlet that uses the pipeline to select the network adapter named Ethernet 2 and pipes that object into this cmdlet.
PS C:\> Get-NetAdapter -Name "Ethernet 2"  | Disable-NetAdapterSriov

The first command gets the network adapter named Ethernet 2 and stores the result in the variable named $NetAdapter2.

The second command disables the SR-IOV adapter stored in the $NetAdapter variable.

Example 3: Disable SR-IOV on the specified network and do not restart it

PS C:\> Disable-NetAdapterSriov -Name "Ethernet 3" -NoRestart

This command disables SR-IOV on the network adapter named Ethernet 3 without restarting the network adapter.

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
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-CimSession or Get-CimSession 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

-IncludeHidden

Indicates that the cmdlet includes both visible and hidden network adapters in the operation. By default only visible network adapters are included. If a wildcard character is used in identifying a network adapter and this parameter has been specified, then the wildcard string is matched against both hidden and visible network adapters.

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

-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
Required:True
Accept pipeline input:True
Accept wildcard characters:False

-InterfaceDescription

Specifies an array of network adapter interface descriptions. For a physical network adapter this is typically the name of the vendor of the network adapter followed by a part number and description, such as "Contoso 12345 Gigabit Network Device".

Type:String[]
Aliases:ifDesc, InstanceID
Position:Named
Default value:None
Required:True
Accept pipeline input:True
Accept wildcard characters:False

-Name

Specifies an array of network adapter names.

Type:String[]
Aliases:ifAlias, InterfaceAlias
Position:0
Default value:None
Required:True
Accept pipeline input:True
Accept wildcard characters:False

-NoRestart

Indicates that the cmdlet does not restart the network adapter after completing the operation. Many advanced properties require restarting the network adapter before the new settings take effect.

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

-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.

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 output object contains the network adapter object with SR-IOV disabled.