Article: Q192467
Product(s): Microsoft Windows NT
Version(s): winnt:1.0,4.0
Operating System(s):
Keyword(s):
Last Modified: 10-AUG-2001
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The information in this article applies to:
- Microsoft Windows NT Server version 4.0
- Microsoft Windows NT Server, Enterprise Edition version 4.0
- Microsoft Windows NT Load Balancing Service 1.0
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SYMPTOMS
========
When Windows NT Load Balancing Service (WLBS) remote control commands are
invoked from a system outside the cluster, no response is received from one or
more cluster hosts.
CAUSE
=====
This problem can be caused by one of the following:
- The cluster network interface cards (NICs) are not reachable from the outside
system. If you have multiple NICs on a cluster host, the dedicated NIC may be
on a separate subnet from the cluster NIC. If you invoke a remote control
command from an outside system on this subnet, the cluster NICs and WLBS
driver will not receive the command.
- Remote control commands are sent to a secondary cluster IP address. Commands
must be sent to the cluster's primary IP address (which is entered in the
WLBS Setup dialog box).
- WLBS's UDP control port is blocked by a firewall. By default, remote control
commands are sent to UDP port 1717 at the cluster IP address. You can also
change the port number by modifying the corresponding WLBS registry
parameter.
RESOLUTION
==========
To resolve this issue, use one of the following methods that correspond to the
cause listed above:
- Be sure that the cluster NICs on the cluster hosts can be reached by the
outside system.
-or-
- Be sure that you send remote commands to the secondary cluster IP address.
-or-
- Be sure that UDP port 1717 has not been blocked by a router or firewall.
MORE INFORMATION
================
The Windows NT Load Balancing Service is configurable from a remote location by
copying the control program (WLBS.exe) to any Windows NT device.
Additional query words: Convoy WLBS
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Keywords :
Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400search kbWinNTS400 kbWinNTLBS100 kbWinNTLBSSearch
Version : winnt:1.0,4.0
Issue type : kbprb
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