528 Dell PowerConnect 55xx Systems User Guide
FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Maintenance Projects\Dell
Contax\CxUGSwitching_Multicast.fm
DELL CONFIDENTIAL – PRELIMINARY 9/11/12 - FOR PROOF ONLY
IGMP Snooping
IGMP Snooping can be enabled globally, as described in the Global
Parameters page. It can also be enabled per VLAN to support selective IPv4
Multicast forwarding. In this case, Bridge Multicast filtering must also be
enabled.
By default, a Layer 2 switch forwards Multicast frames to all ports of the
relevant VLAN, essentially treating the frame as if it were a Broadcast. When
IGMP Snooping is enabled per VLAN, the switch forwards Multicast frames
to ports that have registered as Multicast clients in the VLAN.
NOTE: The switch supports IGMP Snooping only on static VLANs. It does not
support IGMP Snooping on dynamic VLANs.
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