•IGMP Snooping – enables the Motorola Netopia® Gateway to “listen in” to IGMP traf- fic. The Gateway discovers multicast group membership for the purpose of restricting multicast transmissions to only those ports which have requested them. This helps to reduce overall network traffic from streaming media and other
•Robustness – a way of indicating how sensitive to lost packets the network is. IGMP can recover from robustness minus 1 lost IGMP packet. The default value is 2.
•Query Interval– the amount of time in seconds between IGMP General Query mes- sages sent by the querier gateway. The default query interval is 125 seconds.
•Query Response Interval – the maximum amount of time in tenths of a second that the IGMP router waits to receive a response to a General Query message. The default query response interval is 10 seconds and must be less than the query interval.
•Unsolicited Report Interval – the amount of time in seconds between repetitions of a particular computer’s initial report of membership in a group. The default unsolicited report interval is 10 seconds.
•Querier Version – select a version of the IGMP Querier: version 1, version 2, or version 3. If you know you will be communicating with other hosts that are limited to v1 or v2, for backward compatibility, select accordingly; otherwise, allow the default v3.
☛NOTE:
IGMP Querier version is relevant only if the router is configured for IGMP for- warding. If any IGMP v1 routers are present on the subnet, the querier must use IGMP v1. The use of IGMP v1 must be administratively configured, since there is no reliable way of dynamically determining whether IGMP v1 routers are present on a network. IGMP forwarding is enabled per IP Profile and WAN Connection Profile.
•Last Member Query Interval – the amount of time in tenths of a second that the IGMP gateway waits to receive a response to a
•Last Member Query Count – the number of
•Fast Leave – set to off by default, fast leave enables a
