[Albertwt]

Hi All,

I'd like to create a powershell script to disable and enable the current LAN connections when there is no network connection (ping reply) to gateway IP inside my WIndows Server 2003 VM, it should go like this:

Ping the gateway IP address every 1 hour and when there is no ping reply then disable and enable the current active NIC connection ("Local Area Network Connection").

but it has an error in it and i still don't know the logic or command to check the ping reply.

Note: this is running on Windows Server 2003 x64 with Powershell V2

can anyone help me to fix this please ?

Thanks

##################################################################################################################
# This is how I execute
##################################################################################################################
PS C:\> Set-ExecutionPolicy RemoteSigned
PS C:\> C:\test.ps1
Get-WmiObject : Invalid query
At C:\test.ps1:7 char:26
+ $colItems = get-wmiobject  <<<< -class $class -namespace $namespace -computername $strComputer -filter $filter

You cannot call a method on a null-valued expression.
At C:\test.ps1:12 char:21
+        $objItem.Disable( <<<< )

You cannot call a method on a null-valued expression.
At C:\test.ps1:20 char:20
+        $objItem.Enable( <<<< )

##################################################################################################################
# THE SCRIPT
##################################################################################################################

$filter = "AdapterType = 'Ethernet 802.3' and NetEnabled = 'True'"
$class = "Win32_NetworkAdapter"
$namespace = "root\cimv2"
$strComputer = "."

# Find all Active ethernet 802.3 network cards
$colItems = get-wmiobject -class $class -namespace $namespace -computername $strComputer -filter $filter

# Disable  active network cards
foreach ($objItem in $colItems) {
      write-host $objItem.Description
           $objItem.Disable()
}

Start-sleep 5

# Enable active network cards
foreach ($objItem in $colItems) {
      write-host $objItem.Description
           $objItem.Enable()
}
PS C:\>
##################################################################################################################

[Albertwt]

OK,

I've modified my script to be simpler like the following:

$colItems = Get-wmiobject win32_NetworkAdapter | where {$_.AdapterType -like "*Ethernet*" }

foreach ( $objItems in $colItems ) {
    Write-Host $objItem.Description
    $objItems.Disable
}

Start-sleep 5

# Enable active network cards
foreach ($objItems in $colItems) {
    write-host $objItem.Description
    $objItems.Enable
}

and here's the results:

ServiceName      : b57nd60x
MACAddress       : 00:22:64:4D:28:6F
AdapterType      : Ethernet 802.3
DeviceID         : 7
Name             : Broadcom NetLink (TM) Gigabit Ethernet
NetworkAddresses : 
Speed            : 1000000000

ServiceName      : NETw5s32
MACAddress       : 00:16:EA:BC:4F:7A
AdapterType      : Ethernet 802.3
DeviceID         : 11
Name             : Intel(R) WiFi Link 5100 AGN
NetworkAddresses : 
Speed            : 54000000

ServiceName      : BthPan
MACAddress       : 00:21:86:70:8F:41
AdapterType      : Ethernet 802.3
DeviceID         : 13
Name             : Bluetooth Device (Personal Area Network)
NetworkAddresses : 
Speed            : 0

ServiceName      : DNE
MACAddress       : 00:16:EA:BC:4F:7A
AdapterType      : Ethernet 802.3
DeviceID         : 17
Name             : Deterministic Network Enhancer Miniport
NetworkAddresses : 
Speed            : 

ServiceName      : DNE
MACAddress       : 00:22:64:4D:28:6F
AdapterType      : Ethernet 802.3
DeviceID         : 18
Name             : Deterministic Network Enhancer Miniport
NetworkAddresses : 
Speed            : 

ServiceName      : DNE
MACAddress       : 4C:4C:20:52:41:53
AdapterType      : Ethernet 802.3
DeviceID         : 19
Name             : Deterministic Network Enhancer Miniport
NetworkAddresses : 
Speed            : 

ServiceName      : DNE
MACAddress       : 4C:4C:20:52:41:53
AdapterType      : Ethernet 802.3
DeviceID         : 20
Name             : Deterministic Network Enhancer Miniport
NetworkAddresses : 
Speed            : 

ServiceName      : DNE
MACAddress       : 4C:4C:20:52:41:53
AdapterType      : Ethernet 802.3
DeviceID         : 21
Name             : Deterministic Network Enhancer Miniport
NetworkAddresses : 
Speed            : 

ServiceName      : Teefer2
MACAddress       : 00:16:EA:BC:4F:7A
AdapterType      : Ethernet 802.3
DeviceID         : 26
Name             : Teefer2 Miniport
NetworkAddresses : 
Speed            : 

ServiceName      : Teefer2
MACAddress       : 00:22:64:4D:28:6F
AdapterType      : Ethernet 802.3
DeviceID         : 27
Name             : Teefer2 Miniport
NetworkAddresses : 
Speed            : 

ServiceName      : Teefer2
MACAddress       : 4C:4C:20:52:41:53
AdapterType      : Ethernet 802.3
DeviceID         : 28
Name             : Teefer2 Miniport
NetworkAddresses : 
Speed            : 

ServiceName      : Teefer2
MACAddress       : 4C:4C:20:52:41:53
AdapterType      : Ethernet 802.3
DeviceID         : 29
Name             : Teefer2 Miniport
NetworkAddresses : 
Speed            : 

ServiceName      : Teefer2
MACAddress       : 4C:4C:20:52:41:53
AdapterType      : Ethernet 802.3
DeviceID         : 30
Name             : Teefer2 Miniport
NetworkAddresses : 
Speed            :

but when i try to ping mygatewayIP -t the connection is still up ? not gets dropped ?

Can anyone help me please ?

[Albertwt]

even after I make the adapter selection to be more sophisticated (details)

it is still failed too with the error:

Method invocation failed because [Microsoft.PowerShell.Commands.Internal.Format.FormatStartData] doesn't contain a method named 'Disable'.
At :line:7 char:20
+    $objItems.Disable <<<< ()

$colItems = Get-WmiObject Win32_NetworkAdapter -Filter "AdapterType='Ethernet 802.3'" | foreach {
        Get-WmiObject -Query "ASSOCIATORS OF {Win32_NetworkAdapter.DeviceId='$($_.DeviceID)'} WHERE ResultClass=Win32_NetworkAdapterConfiguration" | Format-List *
}

foreach ( $objItems in $colItems ) {
   Write-Host $objItem.Description
   $objItems.Disable()
}

Start-sleep 5

# Enable active network cards
foreach ($objItems in $colItems) {
   write-host $objItem.Description
   $objItems.Enable()
}

I even try to putthe brackets in to no avail see the screenshot

[vonPryz]

Take a look at earlier thread. There is an example about how to get the ping results.

-vP

[Albertwt]

Originally Posted by vonPryz

Take a look at earlier thread. There is an example about how to get the ping results.

-vP

To all here's my final script that works:

while (!(Test-Connection gateway -Quiet -Count 1)) {
	Get-WMIObject Win32_NetworkAdapter -Filter "NetConnectionID LIKE '%'" | %{
		netsh interface set interface "$($_.NetConnectionID)" DISABLED
		netsh interface set interface "$($_.NetConnectionID)" ENABLED
	}
	Send-MailMessage -to "admin@domain.com" -from "administrator@server.domain.com" -subject "TS NIC problem recovery" -body "vNIC reset by powershell v2.0" -smtpServer mail.domain.com
}

this is using Powershell 2.0

hope this helps.