Configuration > Igmp Snooping - D-Link DGS-1248T User Manual

NOTE: Each combined trunk port must be connected to devices
within the same VLAN group.
Configuration > IGMP Snooping
With Internet Group Management Protocol (IGMP) snooping, the
Web-Smart Switch can make intelligent multicast forwarding
decisions by examining the contents of each frame's Layer 2 MAC
header.
IGMP snooping can help reduce cluttered traffic on the LAN. With
IGMP snooping enabled globally, the Web-Smart Switch will forward
multicast traffic only to connections that have group members
attached.
Figure 32 – Configuration > Trunking
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