Motorola WiNG 5.5 Reference Manual page 335

Figure 5-154 Device Overrides - Network - IGMP Snooping Screen
6. Set the following parameters to configure general IGMP Snooping values.
Enable IGMP Snooping
Forward Unknown
Multicast Packets
7. Set the following for IGMP Querier
Enable IGMP Querier
IGMP Version
IGMP Query Interval
IGMP Robustness
Variable
Select the box to enable IGMP Snooping on the access point. This feature is enabled by
default.
Select this option to enable the access point to forward multicast packets from
unregistered multicast groups. If disabled, the Unknown Multicast Forward feature is
also disabled for the selected VLANs. This is enabled by default.
configuration:
Select this option to enable IGMP querier. IGMP snoop querier is used to keep host
memberships alive. It is primarily used in a network where there is a multicast streaming
server and hosts subscribed to the server and no IGMP querier present. The controller can
perform the IGMP querier role. An IGMP querier sends out periodic IGMP query packets.
Interested hosts reply with an IGMP report packet. IGMP snooping is only conducted on
wireless radios. IGMP multicast packets are flooded on wired ports. IGMP multicast
packet are not flooded on the wired port. IGMP membership is also learnt on it and only
if present, then forwarded on that port. An AP71xx model access point can also be an
IGMP querier.
Use the spinner control to set the IGMP version compatibility to one of IGMP version 1,2
or 3. The default IGMP version is 3.
Sets the IGMP query interval. This parameter will be used only when the querier
functionality is enabled. Define an interval value in Seconds (1 - 18,000), Minutes (1 - 300)
or Hours (1 - 5) up to maximum of 5 hours. The default value is 60 seconds.
Sets the IGMP robustness variable. The robustness variable is a way of indicating how
susceptible the subnet is to lost packets. IGMP can recover from robustness variable
minus 1 lost IGMP packets. Define a robustness variable from 1 - 7. The default
robustness value is 2.
Device Configuration 5 - 249