Batch File: Monitor DHCP activities

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ASKER

Thanks Chris,

I'll look at it tomorrow.

Cheers,
Rene

Here is a way to dump all the assigned DHCP ip addresses for all of your scopes with a single command from the command prompt:

for /f %i in ('netsh dhcp server MYDHCPSERVERNAME show scope ^|findstr "255.0"') do netsh dhcp server MYDHCPSERVERNAME scope %i show clients

Please note if you want to use this in a batch file you need to use two % not just one so it would be:

show-dhcp-clients.bat
================
for /f %%i in ('netsh dhcp server MYDHCPSERVERNAME show scope ^|findstr "255.0"') do netsh dhcp server MYDHCPSERVERNAME scope %%i show clients

ASKER

@xylog,

The command line did not work for me.

So I tried: netsh dhcp server mydhcpservername show scope

And I got the an error saying that the command was not found: netsh ... scope

So I openned a DOS window on my XP computer:
Typed:
>netsh
>dhcp = Command not found.

I openned a DOS window on my Domain Controller
Typed:
>netsh
>dhcp
>server MYDHCPSERVERNAME = COMMAND NOT FOUND
>show scope = LISTED ALL DHCP SCOPS BUT NOT THEIR CONTENTS

Thanks and cheers,
Rene

Which OS version on each? I tend to test stuff on Win 7 / 2008 R2 which can mangle results as MS do so like to change things, including netsh.

Anyway, with the command above, you'd need to select the scope, then list the clients inside that scope. I've been meaning to write a decent PowerShell interface for DHCP, but time seems limited recently.

Chris

ASKER

Correction:

On the D.C.

>server show scope = LISTED ALL DHCP SCOPS BUT NOT THEIR CONTENTS

The command is literal, show scope shows you the configured scopes, not leases or reservations within the scope.

Chris

ASKER

@Chris-Dent

XP Pro and the D.C. is W.S. 2003

A command line would be preferable. I'll only use Power Shell if absolutly needed.

Thanks for your help,
Rene

NetSh is all you'll get really, it'll be a case of playing with the options inside. You're looking to enter the Scope context, then get the clients. I'm afraid I can't give you 2003 / XP specific syntax, I don't run either any more.

But, from where you are, it should be a case of:

scope <NetworkAddressOfYourScope>

Then take a look at the show options.

It's not a very good or consistent interface I'm afraid, but it really is the only one you'll get unless you go for exporting to a file in the DHCP MMC (if it even permits that).

Chris

Did you try the command I posted above:

for /f %i in ('netsh dhcp server MYDHCPSERVERNAME show scope ^|findstr "255.0"') do netsh dhcp server MYDHCPSERVERNAME scope %i show clients

That will dump out all client leases for all scopes.

ASKER

Yes I've tried it.
It's the MYDHCPSERVERNAME portion that bugs on my D.C.

(Yes I replace MYDHCPSERVERNAME with the name of my DHCP server ;-)

So since you insisted, I'v played with it, removed it from the command line as:
for /f %i in ('netsh dhcp server show scope ^|findstr "255.0"') do netsh dhcp server scope %i show clients

This worked when running it on the domain controller (that is also the DNCP server) but now, I need to run it from my XP Pro computer.

Thanks

ASKER

for /f %i in ('netsh dhcp server show scope ^|findstr "255.0"') do netsh dhcp server scope %i show clients

ASKER CERTIFIED SOLUTION

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ASKER

Works on a remote W.S. 2003.

And what about the fact that the NETSH DHCP command is not available on my XP Pro PC?

Have any ideas?

Thanks,
Rene

You can use psexec to run the command remotely:

psexec -U username \\MYDHCPSERVERNAME netsh dhcp server \\MYDHCPSERVERNAME show scope

What used to do was run a batch file as a scheduled task on the dhcp server every 15 minutes to dump all the client info to a text file that I could view on a webpage.