IMPORTANT: This article contains information about modifying the registry. Before you
modify the registry, make sure to back it up and make sure that you understand how to restore
the registry if a problem occurs. For information about how to back up, restore, and edit the
registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
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.