Network Adapter Fault Tolerance for Windows NT 4.0

• Microsoft Windows NT Server version 4.0

SUMMARY

Network adapter fault tolerance provides improved reliability to a network server by using a second identical network adapter that can continue network operations in the event of a failure of the primary network adapter. Microsoft Windows NT does not directly provide this feature, but it is provided by some manufacturers of network interface cards.

MORE INFORMATION

On a server that requires high availability, a single network card can be a critical point of failure. Network adapter fault tolerance provides an extra level of reliability by using an adapter and driver combination that senses a failure on one adapter, then migrates its function (including its IP address in a TCP/IP environment) in a manner transparent to the operation of both the host server and clients.

Windows NT does not directly provide this function, but it has been implemented by third-party manufacturers of network adapters for use with Windows NT.

Currently, these manufacturers are shipping adapter and driver sets that support network adapter fault tolerance:

Compaq Computer Corporation, using Compaq Advanced Network Control Utility:

• NetFlex-3/E Controller
• NetFlex-3/P Controller
• Netelligent 10/100TX PCI UTP Controller
• Netelligent 10T PCI UTP Controller
• Netelligent Integrated 10/100 TX UTP Controller
• Netelligent Dual 10/100 TX PCI UTP Controller

• EtherExpress(TM) PRO/100 Server adapters

REFERENCES

Compaq white paper: Compaq Advanced Network Error Correction Support in a Microsoft Windows NT Server Environment. Available from the following location on the Internet:

   http://www.compaq.com

   http://www.intel.com