Cannot Ping a WLBS Server from Another WLBS Server (197864)


The information in this article applies to:

  • Microsoft Windows NT Server, Enterprise Edition
  • Microsoft Windows NT Server 4.0
  • Microsoft Windows NT Load Balancing Service
This article was previously published under Q197864

SYMPTOMS

When you ping a cluster host's dedicated IP address from another cluster host, you receive no response.

CAUSE

This issue is a single network interface card (NIC) limitation. If you are using a single NIC and have not selected the Windows NT Load Balancing Service (WLBS) multicast support, the cluster hosts will not be able to communicate with each other even though they can exchange network traffic with outside systems.

NOTE: On a cluster host with multiple NICs (multihomed), using the Virtual NIC to access the dedicated IP address (IP address bound to the virtual NIC but configured not to be load balanced) of another multihomed cluster host causes WLBS to consider this a single-NIC configuration

RESOLUTION

To resolve this issue, select multicast support in the WLBS Setup dialog box to eliminate this problem.
Modification Type:MajorLast Reviewed:6/4/2001
Keywords:kbprb KB197864
©2002 Microsoft Corporation. All rights reserved.