Published: March 23, 2012

Updated: April 17, 2012

Applies To: Windows 7, Windows Server 2003, Windows Server 2003 R2, Windows Server 2008, Windows Server 2008 R2, Windows Server 7, Windows Vista, Windows XP

Using Network Load Balancing Manager, you can configure and manage your Network Load Balancing clusters and all cluster hosts from a single computer, and you can also replicate the cluster configuration to other hosts. You can start Network Load Balancing Manager from the command-line using the command nlbmgr.exe, which is installed in the systemroot\System32 folder.


nlbmgr [/help] [/noping] [/hostlist <filename>] [/autorefresh <interval>]


Parameter Description


Displays help at the command prompt.


Prevents Network Load Balancing Manager from pinging the hosts prior to trying to contact them through Windows Management Instrumentation (WMI). Use this option if you have disabled Internet Control Message Protocol (ICMP) on all available network adapters. If Network Load Balancing Manager attempts to contact a host that is not available, you will experience a delay when using this option.

/hostlist <filename>

Loads the hosts specified in filename into Network Load Balancing Manager.

/autorefresh <interval>

Causes Network Load Balancing Manager to refresh its host and cluster information every <interval> seconds. If no interval is specified, the information is refreshed every 60 seconds.


Displays Help at the command prompt.


  • Network Load Balancing Manager is included in the Windows Server 2003 Administration Tools Pack and can also be installed and used on Windows XP Professional. You can use Network Load Balancing Manager on Windows XP Professional only to manage Network Load Balancing clusters on remote computers running Windows Server 2003. You cannot install the Network Load Balancing service on Windows XP Professional without the Windows Server 2003 Administration Tools Pack.

Additional references