multicast IP addresses

[kr6655]

Why does Windows XP Home not permit adapter IP addresses
to be set in Class D space for multicasting. It displays
an error message that IP address (1st byte) cannot be
higher than 223.

 

[Dusty Harper {MS}]

Because a multicast address is really not meant to identify a specific
adapter. Multicast addresses are joined using IGMP Joins. this will
associate the adapter with that group.

 

[Dusty Harper {MS}]

You need to have a machine that is connected to both the wired and wireless
network that has some sort of Multicast Forwarding capabilities. Windows
Server's RRAS allows for this and includes IGMP

 

[Guest]

Can this be done if the OS is Windows XP Home? I think I have enabled the
IGMP and added ForwardMulitcast to the registry, but nothing is forwarded.

 

[Dusty Harper {MS}]

Where did you hear about ForwardMulticasts? I'd have to see if this is
valid. To my understanding its not, RRAS is the only MS product with IGMP
service capabilities ( It creates a Multicast Forwarding table and
communicates with other Multicast enabled routers )

--
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Dusty Harper
Microsoft Corporation
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This posting is provided "AS IS", with NO warranties and confers NO rights
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Can this be done if the OS is Windows XP Home? I think I have enabled the
IGMP and added ForwardMulitcast to the registry, but nothing is forwarded.



-- rights

[/QUOTE]

 

[Dusty Harper {MS}]

Any of the Server Skus for Windows 2000 and Windows 2003, and NT4 Server
with SP4+ has RRAS as an addin component.

That regkey is supported in XP Professional

http://www.microsoft.com/resources/...2003/all/techref/en-us/w2k3tr_mcast_tools.asp

 

[Dusty Harper {MS}]

I dug around and talked with the devs. They confirmed for me that this key
is only used by RRAS. If it were to work, there is no means to actually
listen to group joins etc. So in order for your scenario to work, you need
to have Server with RRAS and IGMP installed.

I'll mail the author of the mentioned article and have them correct their
inaccuracy for the key.