Vista - What's in a Ping? or a Ping by another method.

Hi,

I have been wondering about this for a while.

Many of the scripts here use this method to Ping a server:

$ping = new-object System.Net.NetworkInformation.Ping
$reply = $ping.Send($srv)
if ($reply.status -eq "Success")
{ do something } Else { Write-Host $srv " Does Not Ping" }


However, I have been using this method with good results:

$response = Get-WmiObject -query "Select * From Win32_PingStatus Where
Address = '$srv'"

if( ($response -eq $null) -or ($response.StatusCode -ne 0))
{ Write-Host $srv " Does Not Ping" } Else { do something }


So, What's the difference? or what is the advantage of one over the
other?

no major different... one is .NET the other is WMI.

One thing the WMI can offer is a remote ping.

Brandon Shell [MVP]
------------------------
Blog: http://www.bsonposh.com/
Author: http://www.TurboChargeAD.org
Profile: https://mvp.support.microsoft.com/profile/Brandon

O> Hi,
O>
O> I have been wondering about this for a while.
O>
O> Many of the scripts here use this method to Ping a server:
O>
O> $ping = new-object System.Net.NetworkInformation.Ping
O> $reply = $ping.Send($srv)
O> if ($reply.status -eq "Success")
O> { do something } Else { Write-Host $srv " Does Not Ping" }
O> However, I have been using this method with good results:
O>
O> $response = Get-WmiObject -query "Select * From Win32_PingStatus
O> Where Address = '$srv'"
O>
O> if( ($response -eq $null) -or ($response.StatusCode -ne 0)) {
O> Write-Host $srv " Does Not Ping" } Else { do something }
O>
O> So, What's the difference? or what is the advantage of one over the
O> other?
O>

A ping is an ICMP echo request.

Both of these methods send one, so there is very little difference from a
networking perspective.



"OldDog" wrote:

On Feb 18, 3:10*pm, Brandon Shell [MVP] <a_bshell.m...@xxxxxx>
wrote:OK, that's pretty basic. Why does one method, .NET, seemed to be
prefered over the WMI on this forum?

BTW I get odd errors when I use the .NET method if the machine I am
trying to ping does not exist.

shrug... I prefer the WMI one

Brandon Shell [MVP]
------------------------
Blog: http://www.bsonposh.com/
Author: http://www.TurboChargeAD.org
Profile: https://mvp.support.microsoft.com/profile/Brandon

O> On Feb 18, 3:10 pm, Brandon Shell [MVP] <a_bshell.m...@xxxxxx>
O> wrote:
O>O> OK, that's pretty basic. Why does one method, .NET, seemed to be
O> prefered over the WMI on this forum?
O>
O> BTW I get odd errors when I use the .NET method if the machine I am
O> trying to ping does not exist.
O>

One big difference is execution time. Using the .net method I can ping-sweep
an entire class c network on our internal network and do a dns resolution on
anything that answers in about 2 minutes.

I started off trying this with WMI, and got tired of waiting for it to finish.

"OldDog" wrote:

My experience has been quite different and actually along those lines you
can specify the time out with WMI. I do not believe you can do that with
the .NET provider.


Brandon Shell [MVP]
------------------------
Blog: http://www.bsonposh.com/
Author: http://www.TurboChargeAD.org
Profile: https://mvp.support.microsoft.com/profile/Brandon

RC> One big difference is execution time. Using the .net method I can
RC> ping-sweep an entire class c network on our internal network and do
RC> a dns resolution on anything that answers in about 2 minutes.
RC>
RC> I started off trying this with WMI, and got tired of waiting for it
RC> to finish.
RC>
RC> "OldDog" wrote:
RC>

Try this.


get-date

$network = "10.1.3.0"


[int]$timeout = 20
[switch]$resolve = $true
[int]$TTL = 128
[switch]$DontFragment = $false
[int]$buffersize = 32

$options = new-object system.net.networkinformation.pingoptions
$options.TTL = $TTL
$options.DontFragment = $DontFragment
$buffer=([system.text.encoding]::ASCII).getbytes("a"*$buffersize)

foreach ($a in 1..254){

$remotehost = $($network.trim("0")) + $a
$ping = new-object system.net.networkinformation.ping
$reply = $ping.Send($remotehost,$timeout,$buffer,$options)
if ($resolve) {
$hostname = ([System.Net.Dns]::GetHostEntry($remotehost)).hostname
if ($hostname -eq $remotehost){$hostname = "No RDNS"}
}

if ($reply.status -eq "Success"){$remotehost + "`t" + $reply.status + "`t`t"
+ $hostname}
else {$remotehost + "`t" + $reply.status + "`t" + $hostname}

}

get-date



"Brandon Shell [MVP]" wrote: