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Disable new traffic handling for specific ports

  • Article

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

To disable new traffic handling for specific ports

  • Using the Windows interface

  • Using a command line

Using the Windows interface

  1. Open Network Load Balancing Manager.

  2. If Network Load Balancing Manager does not already list the cluster, connect to the cluster.

  3. Right-click a host or a cluster, and then click Control Ports.

  4. Select the port rule that contains the ports that you want to drain and then click Drain.

Important

  • To start Network Load Balancing Manager, open a Command prompt. From the command window, type NLBMgr, and then press ENTER.

Notes

  • When using Network Load Balancing Manager, you must be a member of the Administrators group on the host that you are configuring, or you must have been delegated the appropriate authority. As a security best practice, consider using Run as to perform this procedure. If you are configuring a cluster or host by running Network Load Balancing Manager from a computer that is not part of the cluster, you do not need to be a member of the Administrators group on that computer. For more information, see Default local groups, Default groups, and Using Run as.

  • To start Network Load Balancing Manager, open Command Prompt. From the command window, type NLBMgr.exe, and then press ENTER.

  • Draining disables new traffic handling for the rule whose port range contains the specified port. New connections to the specified hosts are not allowed, but all active connections are maintained. To disable active connections, use the disable command instead.

  • Performing this command at the cluster level drains the specified ports on all hosts within the cluster. Performing this command at the host level drains the ports on the specific host only.

  • This command has no effect if the specified hosts have not started cluster operations.

Using a command line

  1. Open Command Prompt.

  2. Type:

    nlb.exe drainvip[:port|:all] | all[:port|:all] cluster[:host]| all [local|global]

    For more information about the parameters that you can use with this command, see "Nlb" in Related Topics.

Notes

  • To run nlb.exe from a remote computer, you must enable remote control on the host that is running Network Load Balancing. The Network Load Balancing remote control option presents many security risks, including the possibility of data tampering, denial of service and information disclosure. Only use remote control on a secure computer within your firewall. Because of the many security risks remote control presents, it is recommended that you do not enable the remote control feature. Instead, use other remote management tools such as Network Load Balancing Manager or Windows Management Instrumentation (WMI).

  • To open a command prompt, click Start, point to All programs, point to Accessories, and then click Command prompt.

  • To run nlb.exe from a remote computer, you must enable remote control on the host that is running Network Load Balancing. The Network Load Balancing remote control option presents many security risks, including the possibility of data tampering, denial of service and information disclosure. Only use remote control on a secure computer within your firewall. Because of the many security risks remote control presents, it is recommended that you do not enable the remote control feature. Instead, use other remote management tools such as Network Load Balancing Manager or Windows Management Instrumentation (WMI).

  • This command disables new traffic handling for the rule whose port range contains the specified port. All ports specified by the port rule are affected.

    If all is specified for the port, this command is applied to the ports covered by all port rules.

  • Draining can be performed on the entire cluster or remotely to a single host.

Information about functional differences

  • Your server might function differently based on the version and edition of the operating system that is installed, your account permissions, and your menu settings. For more information, see Viewing Help on the Web.

See Also

Concepts

Connect to existing clusters from Network Load Balancing Manager using a host list
Connect to existing clusters from Network Load Balancing Manager using a single host
Nlb
Disable new traffic handling for specific ports and stop Network Load Balancing
Restart handling Network Load Balancing cluster traffic
Nlbmgr