IP-COM F1226P - IGMP Snooping

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4. STP Port Configurations
Select a port number from corresponding drop-down list and specify priority and path cost for it.
By default, all ports’ priority values are set to 128 and path cost complies with 802.1T standard as seen below.
Fields on the screen are described below:
Field
Description
Select Port
Select a port number from 1-26.
Priority
The priority of a port, for differentiating ports with identical path cost. The
smaller the value, the higher the priority.
Path Cost
A configurable parameter that can be defined by STP algorithm. The path
cost is 2000000 for a 10M net segment and 200000 for a 100M net segment.
Valid values range from 0 to 200000000. If 0 is entered, system will
automatically negotiate an optimum cost.
Role
Display the role that a port plays in spanning tree: Designated, Backup, --,
Root
State
Display port status: Blocking, Disable, Learning, Forwarding
Link Status
Display port link status: --, speed+ duplex mode
Downlink Loopback
Status
Display “Active” when detecting loopback from downlinked devices
otherwise display “--”.
3.5.5 IGMP Snooping
1. IGMP Snooping Overview
IGMP snooping is the process of listening to Internet Group Management Protocol (IGMP) network traffic. IGMP
snooping, as implied by the name, is a feature that allows a network switch to listen in on the IGMP conversation
between hosts and routers.