EverFocus Gigabit Managed Ethernet Switch ESM308T000D - Manual (Page 15)

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WEB-BASED BROWSER MANAGEMENT
RSTP Port Configuration
Port: The port ID can’t be changed. “Aggregations” refers to any configured trunk
group.
Protocol Enabled: Click to enable (checked) or disable (default). When checked,
you’re enabling RSTP for this port as per the configuration in the RSTP Port
Configuration menu.
Edge: The default setting is enabled (checked); click to disable (unchecked). Edge
ports don’t participate in the Spanning Tree Protocol, but still send configuration
messages, linking to an end station or another STP device.
Path Cost: This parameter is used by the STP to determine the best path between
devices. Lower values should be assigned to ports attached to faster media;
higher values for slower media. Set the RSTP pathcost on the port. Enter a
value from 0 to 200000000 or keep the default setting (Auto).
IGMP Snooping
Internet Group Management Protocol (IGMP) Snooping is the process of listening
to IGMP network traffic. As implied by the name, IGMP Snooping is a feature that
allows a Layer 2 switch to “listen in” on the IGMP conversation between hosts and
routers by processing the Layer 3 IGMP packets sent in a multicast network. When
enabled in a switch, IGMP Snooping analyzes all IGMP packets between hosts
connected to the switch and multicast routers in the network. When a switch hears
an IGMP report from a host for a given multicast group, the switch adds the host’s
port number to the multicast list for that group. And when the switch hears an
IGMP “leave,” it removes the host’s port from the table entry. As a result, this
feature prevents flooding of IP multicast traffic and limits bandwidth-intensive video
traffic to subscribers only.