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How to use Network Monitor Capture Utility in Windows XP

Unlike Windows 2000 that includes a Network Monitor agent, XP uses a command-line tool called cnetcap.exe that provides capabilities similar to Network Monitor. You can find netcap.exe utility as part of the Support Tools on the XP CD-ROM.

Netcap provides capture abilities that are similar to the version of Network Monitor that is included with the Windows Server products; however, you must use Netcap at a command prompt. Netcap installs the Network Monitor driver and binds it to all adapters when you first run the Netcap command.

The following commands are sample Netcap commands:

To capture traffic on NIC 1 BY using a 10 megabyte (MB) buffer, use the following command:

netcap /n:1 /b:10

Netcap typically stops capturing when the buffer is full. To capture traffic with "First In First Out" (FIFO) buffering, which is the default for Network Monitor, you can use the following command:

netcap /t n

Note that if you want to stop the capture, press the SPACEBAR.

To capture traffic for one hour by using a 1-MB FIFO buffer, use the following command:

netcap /L:01:00:00

To remove the Network Monitor driver, use the following command:

netcap /remove

Capture files that you create by using Netcap are placed in the UserProfile\Local Settings\Temp folder, by default, where UserProfile is the name of the user profile. You can change the default folder by using either the /c or /tcf switches.

For full Help, type

netcap /?

If you want to remove the Network Monitor driver, simply type

c:\> netcap /remove

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Related Topics

How to install Network Monitor in Windows 2000
How to install Network Monitor in Windows 2003
How to use Network Monitor Capture Utility in Windows XP

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