JSI Tip 1217. Tuning the Windows NT Load Balancing Service via the registry.

To tune/configure the WLBS, use regedt32 to navigate to:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WLBS\Parameters

 Value Name   Type   Range
Default
 
 D e s c r i p t i o n   GUI 
 AliveMsgPeriod   REG_DWORD   100 - 10000
1000
 
 The milliseconds between "I am alive" status messages.   N 
 AliveMsgTolerance   REG_DWORD   5 - 100
5
 
 The number of periods to wait before a host is declared dead.   N 
 ClusterName   REG_SZ      Name of the WLBS cluster.   Y 
 ClusterIPAddress   REG_SZ      IP address of the cluster.   Y 
 ClusterNetworkAddress   REG_SZ      MAC address of the cluster.   Y 
 ClusterNetworkMask   REG_SZ      Cluster network mask.   Y 
 ClusterModeOnStart   REG_DWORD   0 or 1
0
 
 Should WLBS start on boot up.   Y 
 ConnectionCleanupDelay   REG_DWORD   0 - 3600000
300000
 
 TCP connection cleanup delay (milliseconds) between cluster mode restarts.   N 
 DedicatedIPAddress   REG_SZ      IP address of the WLBS host's NIC.   Y 
 DedicatedNetworkMask   REG_SZ      Subnet mask of the WLBS host's NIC.   Y 
 DescriptorsPerAlloc   REG_DWORD   16 - 1024
512
 
 Number of connection descriptors allocated at a time.   N 
 HostPriority   REG_DWORD   1 - 32
1
 
 Host Priority.   Y 
 IPToMACEnable   REG_DWORD   0 or 1
0
 
 Enable automatic network address derivation from primary cluster IP address.   N 
 LicenseKey   REG_SZ      License key used by the WLBS cluster.   Y 
 MaxDescriptorsAlloc   REG_DWORD   1 - 512
1
 
 Maximum number of times connection descriptors can be allocated.   N 
 MaskSourceMAC   REG_DWORD   0 or 1
1
 
 A 1 masks source MAC in outbound packets, stopping switches from learning and forcing them to broadcast packets for unknown addresses to all ports.   N 
 MulticastSupportEnable   REG_DWORD   0 or 1
0
 
 Enables multicast mode.   N 
 MulticastARPEnable   REG_DWORD   0 or 1
0
 
 Enables ARPing from cluster IP to MAC in multicast mode.   N 
 NBTSupportEnable   REG_DWORD   0 or 1
1
 
 A 1 enables NBT cluster computer name support.   N 
 RemoteControlEnabled   REG_DWORD   0 or 1
1
 
 A 1 enables remote control.   N 
 RemoteControlUDPPort   REG_DWORD   1 - 65535
2504
 
 Remote control UDP port for WLBS   N 


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