Install Instructions

Infinet Wireless: Technical Documentation – InfiMAN Evolution
Operation & Administration – 117
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69 Figure - IGMP snooping configuration
IGMPSnooping is a multicast constraining mechanism that runs on Layer 2 devices to manage and control
multicast groups. By listening to and analyzingIGMPmessages, the device runningIGMPSnooping establishes
mappings between ports and multicastMACaddresses and forwards multicast data based on these mappings.
In order forIGMPsnooping to function, a multicast router must exist on the network and generateIGMPqueries.
The tables created for snooping (holding the member ports for each a multicast group) are associated with the
multicast router. Without a multicast router, the tables are not created and snooping will not work.
Furthermore,IGMPgeneral queries must be unconditionally forwarded by all switches involved inIGMPsnooping.
IGMPSnooping parameters can be set within "MACSwitch" section:
IGMP Snooping parameter Description
Router Port Forwarding Enable/disable forwarding to router ports
Flood IGMP Reports Enable/disable flood IGMP reports to all bridging ports,
not only to router ports
Permit Zero IP Querier Allow/deny query requests with source address 0.0.0.0
Replace Source IP Replace source IP in all IGMP reports/query packets
Last Member Query Timeout (LMQT) Set the timeout (in seconds)
Group Membership Interval (GMI) Set the interval (in seconds)
Multicast Group Limit Set the limit number for the multicast group
Enable Querier Start/stop the IGMP querier
VLAN Set the IGMP querier VLAN ID in case of a VLAN broadcast
domain
Disable Election Enable/disable the IGMP querier election process