Invalid Multicast Packets Sent with Windows NT TCP/IP Stack

ID: Q234980

The information in this article applies to:

Microsoft Windows NT Workstation versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3, 4.0 SP4, 4.0 SP5
Microsoft Windows NT Server versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3, 4.0 SP4, 4.0 SP5

SYMPTOMS

Multicast packets with a time-to-live (TTL) field of zero are sent from Microsoft Windows NT-based hosts on the network. Although these packets should be received by interested processes running on the sending host, the packets should not be sent out on the network.

This behavior may cause problems with multimedia tools that use packets with a TTL of zero for testing purposes, or as an inter-process communication mechanism for autodiscovery of components in a multimedia conferencing bus.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:

http://www.microsoft.com/windows/servicepacks/

Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem was first corrected in Windows NT 4.0 Service Pack 6.

Additional query words: mcast igmp

Keywords : kbbug4.00 kbfix4.00 NT4SP6Fix
Version : winnt:4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4,4.0 SP5
Platform : winnt
Issue type : kbbug