CTC Union FSW3208M, Руководство пользователя

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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 subnet, there is only one Querier, and Querier is
usually a 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