D-Link DES-1228P - Manual (Page 51)

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To view the Multicast Entry Table for a given VLAN, press the View
button.
Figure 35 – Configuration > IGMP Multicast Entry Table
Configuration > 802.1D Spanning Tree
802.1D Spanning Tree Protocol (STP) implementation is a backup
link(s) between switches, bridges or routers designed to prevent
network loops that could cause a broadcast storm. When physical
links forming a loop provide redundancy, only a single path will be
forwarding frames. If the link fails, STP activates a redundant link
automatically.
Figure 36 – Configuration > Spanning Tree