Configuring Maximum IPX Packet Size in Windows 95
This article was previously published under Q166321 SYMPTOMS
When you are using the IPX/SPX-compatible protocol that is included in
Windows 95 to communicate across an IPX router, some communications may
not work if the router requires a smaller packet size than is used by the
LAN media (Ethernet or Token Ring, for example).
In some cases, NCP-based communications with NetWare servers may succeed, but operations using other protocols running over IPX, such as SPX or NetBIOS, may not work. CAUSE
You may be able to work around such routing restrictions by manually
limiting the size of IPX packets sent by the communicating systems.
However, when you are using the version of the IPX/SPX-compatible protocol
that is included in Windows 95 (all versions), it is not possible to
manually specify a maximum IPX packet size.
RESOLUTION
An update for Microsoft Windows 95 and OEM Service Release 2 (OSR2) to
provide this functionality is now available from Microsoft, but has not
been fully regression tested and should be applied only to computers
experiencing this specific problem. To resolve this problem immediately,
contact Micros ft Technical Support to obtain the fix.
For a complete list of Microsoft Technical Support phone numbers and information on support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS (http://support.microsoft.com/default.aspx?scid=fh;en-us;cntactms)
This update for Windows 95 and OEM Service Release 2 should have the
following file attributes (or later):
File name Version Date Time Size --------------------------------------------------------- Nwlink.vxd 4.00.1112 4/23/97 11:12am 51,049 bytes It may be possible to work around this issue by limiting the maximum packet size sent by the network adapter itself. Not all network adapter drivers provide such a feature, and implementing such a feature, if it exists, may vary among network adapter drivers. Contact your network adapter manufacturer for more information about this possible workaround. It may also be possible to resolve this issue by a configuration change or updated software or firmware on the router itself. Contact your router manufacturer for more information about this possible workaround. STATUS
Microsoft has confirmed this to be a problem in Microsoft Windows 95 and
OEM Service Release 2 (OSR2).
This updated functionality is not included in Microsoft Windows 98. MORE INFORMATION
For additional information about Windows 95 updates, please see the
following article in the Microsoft Knowledge Base:
161020 (http://support.microsoft.com/kb/161020/EN-US/) Implementing Windows 95 Updates
For additional information about specifying the maximum IPX packet size
for the IPX/SPX-compatible protocol that is included in Windows NT,
see the following article in the Microsoft Knowledge Base:
99745 (http://support.microsoft.com/kb/99745/EN-US/) Tuning NWLINK Registry Parameters
For information about how to contact third-party vendors, see the
following articles in the Microsoft Knowledge Base:
103002 (http://support.microsoft.com/kb/103002/EN-US/) REG: Network Services Entries, Part 6 65416 (http://support.microsoft.com/kb/65416/EN-US/)
Hardware and Software Third-Party Vendor Contact List, A-K
60781 (http://support.microsoft.com/kb/60781/EN-US/) Hardware and Software Third-Party Vendor Contact List, L-P 60782 (http://support.microsoft.com/kb/60782/EN-US/) Hardware and Software Third-Party Vendor Contact List, Q-Z
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