AirLive Ether-GSH8TW v2 - Manual (Page 25)

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 multicast frames only to
those 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 – the port that is usually with source of multicast traffic stream
„ Unregistered IPMC Flooding Enabled – to set forwarding option for unregistered (not joined) IP
multicast traffic.
Enabled: to flood frames to every port
Disable: to forward frames only to those IGMP member ports
Two options can be set for each existing group:
„ IGMP Snooping Enabled – to enable/disable snooping IGMP frames
„ IGMP Querying Enabled – to enable/disable sending IGMP querying frames, in one
Ethernet section, there is only one Querier, and Querier is usually in
router device .
For example, video traffic comes from port 8 which is connected to a router, and port 3,4,5 are connected to
IGMP member, then the configuration may be set as below .
AirLive Ether-GSHTW v2 / 8TW+v2 User’s Manual
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