Igmp - TRENDnet TPE-80WS User Manual

2.1.11 IGMP

The Internet Group Management Protocol (IGMP) is an internal protocol of the Internet Protocol
(IP) suite. IGMP can manage the multicast traffic if the members (switches, router or other
network devices) of group support IGMP. This switch provides IGMP snooping feature to detect
IGMP queries, report packets and manage the IP multicast traffic through the switch. This feature
can limit the forwarding of multicast frames to only ports that are a member of multicast group.
Only IPv4 IGMP frames are recognized for this system.
The following parameters are provided for configuring IGMP snooping for this system:
IGMP Enabled – to globally enable/disable IGMP snooping function
Router Ports – to specify administrative router ports for IGMP frames
Unregistered IPMC Flooding Enabled – to set forwarding option for unregistered (not
joined) IP multicast traffic. Enabled: to flood frames; Disable: to forward frames to router
ports only
Two options can be set for each existing VLAN group:
IGMP Snooping Enabled – to enable/disable snooping IGMP frames
IGMP Querying Enabled – to enable/disable sending IGMP querying frames
The example webpage show in above shows the configuration of IGMP function which has
IGMP enabled, uses port 5 and 6 as router ports to forward the IGMP frames, forwards
unregistered IPMC frames to router ports (port 5 and 6), and enables snooping IGMP and
sending querying frames for the VLAN group which VID = 1.
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