As Dan says you will need a Layer-3 device (per VLAN) that has IGMP enabled on it to act as the IGMP querier (and Multicast DR). Without this multicast will just flood. Also the 3508XL doesn't support IGMP snooping, only CGMP snooping so you would need to enable CGMP on the layer-3 device as well. The 3500XL series are EOL and you should really look at replacing this, maybe introduce a layer-3 core and solve the multicast issue as well?
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...