Article ID: 226124
Article Last Modified on 2/26/2007
APPLIES TO
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional Edition
This article was previously published under Q226124
SYMPTOMS
When you attempt to send multicast packets on a computer with multiple network connections, the multicast packets may not be sent on the expected network adapter.
CAUSE
In the following example, a computer has a network adapter with a Default Gateway setting of 209.43.128.138 (the first entry in the route table). Then, a Point-to-Point protocol (PPP) connection is made with a Default Gateway setting of 172.31.248.1 (the second entry). That route is added to the route table with a metric of 2, making it the default route. However, in the Multicast section (a network address of 224.0.0.0), all routes have a metric of 1. Therefore, no one adapter is designated as preferred.
| Network address | Netmask | Gateway address | Interface | Metric |
|---|---|---|---|---|
| 0.0.0.0 | 0.0.0.0 | 209.43.128.138 | 209.43.128.138 | 1 |
| 0.0.0.0 | 0.0.0.0 | 172.31.248.1 | 172.31.253.85 | 2 |
| 0.0.0.0 | 0.0.0.0 | 172.31.248.1 | 172.31.253.255 | 2 |
| 127.0.0.0 | 255.0.0.0 | 127.0.0.1 | 127.0.0.1 | 1 |
| 172.31.248.0 | 255.255.248.0 | 172.31.253.255 | 172.31.253.255 | 1 |
| 172.31.248.0 | 255.255.248.0 | 172.31.253.85 | 172.31.253.85 | 1 |
| 172.31.253.85 | 255.255.255.255 | 127.0.0.1 | 127.0.0.1 | 1 |
| 172.31.253.255 | 255.255.255.255 | 127.0.0.1 | 127.0.0.1 | 1 |
| 172.31.255.255 | 255.255.255.255 | 172.31.253.85 | 172.31.253.85 | 1 |
| 209.43.128.0 | 255.255.255.0 | 209.43.128.138 | 209.43.128.138 | 1 |
| 209.43.128.138 | 255.255.255.255 | 127.0.0.1 | 127.0.0.1 | 1 |
| 224.0.0.0 | 224.0.0.0 | 172.31.253.255 | 172.31.253.255 | 1 |
| 224.0.0.0 | 224.0.0.0 | 209.43.128.138 | 209.43.128.138 | 1 |
| 224.0.0.0 | 224.0.0.0 | 172.31.253.85 | 172.31.253.85 | 1 |
| 255.255.255.255 | 255.255.255.255 | 209.43.128.138 | 209.43.128.138 | 1 |
RESOLUTION
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
The English version of this fix should have the following file attributes or later:
Date Time Version Size File name
---------------------------------------------------------
12/5/2000 08:12p 5.0.2195.3055 118,704 Afd.sys
4/6/2001 02:46p 5.0.2195.3417 104,720 Msafd.dll
4/6/2001 02:44p 5.0.2195.3465 311,472 Tcpip.sys
3/27/2001 08:35p 5.0.2195.3416 16,240 Tdi.sys
4/6/2001 02:46p 5.0.2195.2104 17,680 Wshtcpip.dll
WORKAROUND
If you are sending multicast packets and they are not being sent on the correct adapter, use the route command to modify the routing table appropriately.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 3.
MORE INFORMATION
For assistance in using the route command, type route /? at a command prompt.
On a server, if you are running RRAS, you may need to use the user interface or the netsh routing command to change the routes depending on how they were added (for example, User mode vs. Kernel mode).
Additional query words: ing
Keywords: kbhotfixserver kbqfe kbbug kbenv kbfix kbnetwork kbwin2000sp3fix KB226124
