Netopia CLI 874 manual Motorola Netopia Router CLI Commands

Motorola Netopia® Router CLI Commands 2-71

Beginning with Firmware version 8.7, v3 is the default.

igmp snooping [ yes no ] no igmp snooping

show igmp snooping

These commands allow you to enable, disable, or show the status of the Motorola Netopia® Router’s ability to “listen in” to IGMP traffic. IGMP “snooping” is a feature of Ethernet layer 2 switches that “listens in” on the IGMP conversation between computers and multicast routers. Through this process, it builds a database of where the multicast routers reside by noting IGMP general queries used in the querier selection process and by listening to other router protocols.

From the host point of view, the snooping function listens at a port level for an IGMP report. The switch then processes the IGMP report and starts forwarding the relevant multicast stream onto the host's port. When the switch receives an IGMP leave message, it processes the leave message, and if appropriate stops the multicast stream to that particular port. Basically, customer IGMP messages although processed by the switch are also sent to the multicast routers.

igmp robustness value no igmp robustness show igmp robustness

These commands allow you to specify or show the Motorola Netopia® Router’s degree of sensitivity to lost packets. IGMP can recover from robustness minus 1 lost IGMP packet. The default value is 2. The range is 2 – 255.

igmp query-intvl value no query-intvl

show query-intvl

These commands allow you to specify or show the amount of time in seconds between IGMP General Query messages sent by the querier router. The default query interval is 125 seconds. The range is 10s – 600s.

igmp query-response-intvl value no query-response-intvl

show query-response-intvl

These commands allow you to specify or show 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. The range is 5 deci-sec – 255 deci-sec; the default is 100 deci-sec.

igmp last-member-query-intvl value show igmp last-member-query-intvl

These commands allow you to specify or show the amount of time in deci-seconds that the router waits to receive a response to a Group-Specific Query message, when igmp-versionis set to v2 or v3..

igmp last-member-query-count value show igmp last-member-query-count

These commands allow you to specify or show the number of Group-Specific Query messages sent.