Dell PowerEdge M420 Dell PowerConnect M8024-k User's Configuration Guide - Page 713

25 Configuring L2 Multicast Features This chapter describes the layer 2 multicast features on the PowerConnect M6220, M6348, M8024, and M8024-k switches. The features this chapter describes include bridge multicast filtering, Internet Group Management Protocol (IGMP) snooping, Multicast Listener Discovery (MLD) snooping, and Multicast VLAN Registration (MVR). NOTE: MVR is not supported on the PowerConnect M6220. The topics covered in this chapter include: • L2 Multicast Overview • Default L2 Multicast Values • Configuring L2 Multicast Features (Web) • Configuring L2 Multicast Features (CLI) • L2 Multicast Configuration Examples L2 Multicast Overview Multicast traffic is traffic from one source that has multiple destinations. The L2 multicast features on the switch help control network flooding of Ethernet multicast and IP multicast traffic by keeping track of multicast group membership. What Are the Multicast Bridging Features? The PowerConnect M6220, M6348, M8024, and M8024-k switches support bridge multicast filtering and bridge multicast forwarding. For Ethernet multicast traffic, the switch uses a database called the Layer 2 Multicast Forwarding Database (MFDB) to make forwarding decisions for packets that arrive with a multicast destination MAC address. By limiting multicasts to only certain ports in the switch, traffic is prevented from going to parts of the network where that traffic is unnecessary. Configuring L2 Multicast Features 713