Managing application connectivity and security policies can be achieved more effectively when following a framework that automates repeatable processes and ensures that the right activities are performed in the right order.
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If your switch is blocking multicasts you have a problem. It is not the function of a switch to block multicasts or broadcasts. That is a router's job. A multicast should be treated like a broadcast and sent out all ports. Is it a manageable switch? Does it have multicast options (like an option to block them for some crazy reason)?