Specify the Conformance Level for IP Multicast (Windows 95/98/Me)

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Registry tweaks, tricks & hacks to optimize, enhance and secure Microsoft Windows.

Specify the Conformance Level for IP Multicast (Windows 95/98/Me)
Category: Home > Network > Protocols > TCP-IP

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This parameter determines to what extent the system supports IP multicasting and participates in the Internet Group Management Protocol, RFC 1112.

There are three levels or conformance:

Level 0: no support for IP multicasting

Level 1: support for sending but not receiving multicast IP datagrams

Level 2: full support for IP multicasting

Open your registry and find the key below.

Create a new string value (or DWORD value for Windows 95) called "IGMPLevel" and set it to either 0, 1 or 2 accord to the level required above.

Restart Windows for the change to take effect.


(Default)	REG_SZ	(value not set)
IGMPLevel	REG_DWORD	0x00000002 (2)


	HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP

Settings:

System Key: [HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP]
Name: IGMPLevel
Type: REG_DWORD (DWORD Value)
Value: 0, 1 or 2 (Default = 2)

Related Tweaks

Specify the Conformance Level for IP Multicast (Windows NT/2000/XP)

Disclaimer: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.

Last Modified: May 14, 2002

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