Motorola WiNG 5 System Reference Manual page 291

7. Set the following IGMP Querier
Enable IGMP Querier
IGMP Version
IGMP Query Interval
IGMP Robustness
Interval
Maximum Response
Time
Other Querier Time
Expiry
8. Select the OK button to save the changes and overrides. Select
parameters for the IGMP configuration:
Select the radio button 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, hosts subscribed to the server and no IGMP
querier present. The access point 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, unless there is a host ready
for receiving mulitcast traffic. 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 either version
1, 2 or 3. The default setting is 3.
Sets the IGMP query interval used only when the querier functionality is
enabled. Define an interval value in Seconds, Minutes or Hours up to a
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 between 1 - 7. The default robustness value is 2.
Specify the maximum time (from 1 - 25 seconds) before sending a responding
report. When no reports are received from a radio, radio information is
removed from the snooping table. The access point only forwards multicast
packets to radios present in the snooping table. For IGMP reports from wired
ports, the access point forwards these reports to the multicast router ports.
The default setting is 10 seconds.
Specify an interval in either Seconds (60 - 300) or Minutes (1 - 5) to set a
timeout interval for other querier resources. The default setting is 1 minute.
Device Configuration 5 - 231
Reset to revert to the last saved configuration.