Does the access switch need to have multicast enabled
yes you need multicast routing enabled and ip pim sparse-dense mode under both SVI interfaces. You can check the status of igmp snooping on catalyst 1300 access layer switches. To support selective IPv4 Multicast forwarding, bridge Multicast filtering must be enabled (in Multicast. IP multicast is a method of transporting Internet Protocol (IP) datagrams from a single source [device or application transmitting the multicast] to a group of interested receivers [devices or applications on devices that are interested in receiving the data] in a single transmission. In the factory default state (IGMP disabled), the switch simply floods all IP multicast traffic it. This is accomplished by allowing network devices, primarily routers and switches, to replicate the data stream only when necessary, directing it along.
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