KB193601 - Registry Parameters for Windows NT Load Balancing Service

SUMMARY

The following registry parameters can be modified to change the behavior of Windows NT Load Balancing Service (WLBS).

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

The registry parameters for WLBS are specified under the following key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WLBS\Parameters

AliveMsgPeriod
Data type = REG_DWORD
Range = 100 - 10000
Default = 1000
Specifies the period in milliseconds between "I am alive" status messages broadcast by each host.

AliveMsgTolerance
Data type = REG_DWORD
Range = 5 - 100
Default = 5
Specifies the number of periods to wait after the last message from a host before it is declared dead.

ClusterIPAddress
Data type = REG_SZ
Specifies the IP address of the WLBS cluster (also configurable through the GUI).

ClusterName
Data type = REG_SZ
Specifies the name used of the WLBS cluster (also configurable through the GUI).

ClusterNetworkAddress
Data type = REG_SZ
Specifies the media access control address used by the WLBS cluster (also configurable through the GUI).

ClusterNetworkMask
Data type = REG_SZ
Specifies the network mask used by the WLBS cluster (also configurable through the GUI).

ClusterModeOnStart
Data type = REG_DWORD
Range = 0 or 1
Default = 0
Specifies whether WLBS should start on boot up (also configurable through the GUI).

ConnectionCleanupDelay
Data type = REG_DWORD
Range = 0 - 3600000
Default = 300000
Specifies TCP connection cleanup delay between cluster mode restarts in milliseconds.

DedicatedIPAddress
Data type = REG_SZ
Specifies the dedicated IP address of the WLBS host's NIC (also configurable through the GUI).

DedicatedNetworkMask
Data type = REG_SZ
Specifies the dedicated network mask of the WLBS host's NIC (also configurable through the GUI).

DescriptorsPerAlloc
Data type = REG_DWORD
Range = 16 - 1024
Default = 512 Specifies the number of connection descriptors allocated at a time.

HostPriority
Data type = REG_DWORD
Range = 1 - 32
Default = 1
Specifies the value for the Host Priority (also configurable through the GUI).

IPToMACEnable
Data type = REG_DWORD
Range = 0 or 1
Default = 0
Enables automatic network address derivation from primary cluster IP address.

LicenseKey
Data type = REG_SZ
Specifies the license key used by the WLBS cluster (also configurable through the GUI).

MaxDescriptorsAlloc
Data type = REG_DWORD
Range = 1 - 512
Default = 512
Specifies the maximum number of times connection descriptors can be allocated.

MaskSourceMAC
Data type = REG_DWORD
Range = 0 or 1
Default = 1
Set to 1 masks source media access control address in outbound packets, preventing switches from learning and forcing them to broadcast packets for unknown addresses to all ports. Set to 0 disables masking of the media access control address.

MulticastSupportEnable
Data type = REG_DWORD
Range = 0 or 1
Default = 0
Enables multicast mode.

MulticastARPEnable
Data type = REG_DWORD
Range = 0 or 1
Default = 0
Enables ARPing from cluster IP to multicast media access control in multicast mode.

NBTSupportEnable
Data type = REG_DWORD
Range = 0 or 1
Default = 1
Enables NBT cluster computer name support.

RemoteControlEnabled
Data type = REG_DWORD
Range = 0 or 1
Default = 1
Enables remote control.

RemoteControlUDPPort
Data type = REG_DWORD
Range = 1 - 65535
Default = 2504
Specifies remote control UDP port for WLBS to use.