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Layer 2 Multicasting in 2960 & 3560

hi all,

One of Customer is Using Cisco Call Manager with 75 IP phones.Now their requirement is to get Music through the IP phone.For that we are using IP celerate which is to be integratred with call manager.But the problem is that inorder to get music, we have to enable Muticast( 225.3.15.12 )for music on the switches.The Call Manager , IP Phones & IP celerate device are in the same subnet.

My question are

a. I want to do muticasting ( 225.3.15.12 ) for music in Layer 2 only

b.What configuration I have to do in the Switch to make IPcelerate which is configured with the above multicast address should act as the source

c.How can I configure the IP Phones which is getting IP through DHCP to join to the muticast group

c. Which muticasting Protocol can be used?

Expecting your valuable replies

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