PS C:WINDOWSsystem32> Function Invoke-SSH
    {
    Param($Hostname,$Username,$Password,$CommandArray,$PlinkAndPath,
    $ConnectOnceToAcceptHostKey = $true)

    $Target = $Username + '@' + $Hostname
    $plinkoptions = "-ssh $Target -pw $Password"


    $CommandArray | % {$remoteCommand += $Commands}

    #plist prompts to accept client host key. This section will
    login and accept  the host key then logout.
    if($ConnectOnceToAcceptHostKey)
    {
    $PlinkCommand  = [string]::Format('echo y | & "{0}" {1}
    exit',$PlinkAndPath, $plinkoptions )
    #Write-Host $PlinkCommand
    $msg = Invoke-Expression $PlinkCommand
    }

    #format plist command
    $PlinkCommand = [string]::Format('& "{0}" {1} "{2}"',
    $PlinkAndPath,$plinkoptions , $remoteCommand)

    #ready to run the following command
    #Write-Host $PlinkCommand
    $msg = Invoke-Expression $PlinkCommand
    $msg | Out-File -FilePath
    C:UsersadminDesktopDevice_Logs_AutomationDeLoAutoTest
    DeLoAutoLog.txt -Append

    }

#Plink path, credentials and target server definition
    $PlinkAndPath
    = "C:UsersadminDesktopDevice_Logs_AutomationDeLoAutoTestplink.exe"
    $Username = "cisco"
    $Password = "cisco"
    $Hostname = "20.1.1.2"
    #Commands to execute on the remote ssh host.
    $Commands += "show version"

Output:

Invoke-SSH -User $Username -Hostname $Hostname -Password $Password
-PlinkAndPath $PlinkAndPath -CommandArray $Commands
plink.exe : FATAL ERROR: SSH protocol version 2 required by configuration
but not provided by server
At line:1 char:10
+ echo y | & "C:UsersadminDesktopDevice_Logs_AutomationDeLoAutoTes ...
+          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (FATAL ERROR: SS...vided by
server:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError

plink.exe : FATAL ERROR: SSH protocol version 2 required by configuration
but not provided by server
At line:1 char:1
+ & "C:UsersadminDesktopDevice_Logs_AutomationDeLoAutoTestplink.e ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (FATAL ERROR: SS...vided by
server:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError


 PS C:WINDOWSsystem32> ping 20.1.1.2

 Pinging 20.1.1.2 with 32 bytes of data:
 Reply from 20.1.1.2: bytes=32 time=82ms TTL=255
 Reply from 20.1.1.2: bytes=32 time=15ms TTL=255

 PS C:WINDOWSsystem32>

R2#show run
Building configuration...

Current configuration : 799 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R2
!
aaa new-model
enable secret 5 $1$R2nC$rmtvQxH1Qy6I5UpDQwA5N/
!
username cisco password 0 cisco
memory-size iomem 15
ip subnet-zero
!
!
no ip domain-lookup
ip domain-name rtp.cisco.com
!
ip audit notify log
ip audit po max-events 100
!
call rsvp-sync

interface FastEthernet0/0
ip address 20.1.1.2 255.0.0.0
duplex auto
speed auto
!

line vty 0 4
transport input ssh
!
end

R2#