RRAS IPX VPNs Generate Event ID 20124 (197205)
The information in this article applies to:
- Microsoft Routing and Remote Access Service Update for Windows NT Server 4.0
- Microsoft Windows NT Server 4.0
- Microsoft Windows NT Server, Enterprise Edition 4.0
This article was previously published under Q197205
IMPORTANT: This article contains information about editing the registry.
Before you edit the registry, make sure you understand how to restore it if
a problem occurs. For information on how to do this, view the "Restoring
the Registry" online Help topic in Regedit.exe or the "Restoring a Registry
Key" online Help topic in Regedt32.exe.
SYMPTOMS
When your client computers try to access resources across a Routing and
Remote Access (RRAS) Point-to-Point Tunneling Protocol (PPTP) tunnel
routing IPX, your RRAS server will log the following error:
Event ID 20124
Source: IPXRIP logs with the following description:
Description: Another IPX router claims different network number for
interface <ipxvpn>.
Offending router IPX address is in the data.
RRAS will also stop forwarding IPX and SAP.
CAUSE
The IPX stack sees that a packet from the clients LAN is trying to go over
the WAN adapter and it then uses this network number of the client as the
autonet value for the adapter. The network number is incorrect and will
cause routing to stop.
RESOLUTION
If you receive event ID 20124, you will need to disable the ability of RRAS
to use unnumbered WAN connections.
You can make this change by editing the following registry entry.
WARNING: Using Registry Editor incorrectly can cause serious problems that
may require you to reinstall your operating system. Microsoft cannot
guarantee that problems resulting from the incorrect use of Registry Editor
can be solved. Use Registry Editor at your own risk.
For information about how to edit the registry, view the "Changing Keys And
Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete
Information in the Registry" and "Edit Registry Data" Help topics in
Regedt32.exe. Note that you should back up the registry before you edit it.
If you are running Windows NT, you should also update your Emergency Repair
Disk (ERD).
- Run Registry Editor (Regedt32.exe).
- Go to the following key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RemoteAccess
\Parameters\Ipx
NOTE: The above registry key is one path; it has been wrapped for
readability.
- On the Edit menu, click Add Value and use the following entry (if the
entry already exists, just double-click it to edit the value):
Value Name: EnableUnnumberedWanLinks
Data Type: REG_DWORD
Value range: 0 - 0xFFFFFFFF
Default value: 1
By default, this value is 1. Change this value to 0.
Modification Type: | Major | Last Reviewed: | 7/12/2001 |
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Keywords: | kbprb KB197205 |
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