No Single-Route Broadcast on Token Ring with Windows 95 TCP/IP

ID: Q153749

The information in this article applies to:

Microsoft Windows 95

SYMPTOMS

When you are using a Token Ring network with Windows 95, ARP resolves addresses by first performing a local broadcast and then an All-Routes broadcast, but it does not perform a Single-Route broadcast.

CAUSE

The TCP/IP transport protocol included with Windows 95 uses this method of address resolution to prevent any problems that may occur with older routing bridges.

RESOLUTION

This issue is resolved by the following updated file for Windows 95 and OEM Service Release 2 (OSR2), and later versions of this file:


   VIP.386  version 4.00.952  dated 4/22/96  66,734 bytes

The updated version of this file is included in the Windows Sockets 2.0 update for Windows 95. For information on obtaining this update, see the following article in the Microsoft Knowledge Base:

Q182108 Availability of Windows Sockets 2.0 for Windows 95

STATUS

Microsoft has confirmed this to be a problem in Microsoft Windows 95 and OEM Service Release 2 (OSR2). An update to address this problem is now available, but is not fully regression tested and should be applied only to computers experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft does not recommend implementing this update at this time. Contact Microsoft Technical Support for additional information about the availability of this update.

This issue is resolved in Microsoft Windows 98.

MORE INFORMATION

TCP/IP resolves IP addresses to node (MAC) addresses using the ARP protocol. The All-Routes broadcasts by the ARP protocol do not take advantage of intelligent source-routing bridges that can route broadcasts through the single best route and avoid redundant network traffic.

With this update, a Single-Route broadcast is made instead of an All- Routes broadcast if the following registry string value is present and set to a value of "1":

HKLM\System\CurrentControlSet\Services\VxD\MSTCP\ArpTRSingleRoute

For additional information about issues resolved by updates to this component, please see the following articles in the Microsoft Knowledge Base:

Q157139 Err Msg: The DHCP Client Was Unable to Obtain an IP

Network...

Q153749 No Single-Route Broadcast on Token Ring with Windows 95

TCP/IP

Q142543 Windows 95 Hangs with TCP/IP Routing Enabled

Q154174 Invalid ICMP Datagram Fragments Hang Windows NT, Windows 95

For additional information about Windows 95 updates, please see the following article in the Microsoft Knowledge Base:

Q161020 Implementing Windows 95 Updates

For information about a similar issue in Microsoft Windows NT, please see the following article in the Microsoft Knowledge Base:

Q150559 New Windows NT TCP/IP Registry Parameter: ArpTRSingleRoute

Keywords : kbnetwork kbpolicy win95
Version : 95
Platform : WINDOWS
Issue type : kbprb