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How do I know if IP Multicasting is enabled on my network?

It is same question as above but for windows.

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from a command line:

netsh interface ip show joins

Displays IP multicast groups that have been joined on one or more interfaces. If an interface is not specified, multicast groups for all interfaces are shown.

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a 'route print' would also show you network destination in the routing table for multicast. – l0c0b0x Apr 22 '11 at 20:23

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