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3-52 Administrator's Handbook
If you chose CONTINUE, the device will reboot and restart in the selected mode. Routing features will be
disabled or changed and the Telnet menus corresponding configuration items, such as Easy Setup, will be
removed.
Example of Bridge-only mode menus
If you decide to return to the previous mode, you can repeat the process. Remember that you will have to
reconfigure all your previous settings.
IGMP (Internet Group Management Protocol)
Multicasting is a method for transmitting large amounts of information to many, but not all, computers over an
Internet. One common use is to distribute real time voice, video, and data services to the set of computers
which have joined a distributed conference. Other uses include: updating the address books of mobile
computer users in the field or sending out company newsletters to a distribution list.
Since a router should not be used as a passive forwarding device, Motorola Netopia
for forwarding multicasting: Internet Group Management Protocol (IGMP).
®
Motorola Netopia
Gateways support IGMP Version 1, Version 2 or Version 3. See
page 7-32
for more information.
Unicasting multicast-streams for a wireless link aims at improving the receipt of multicast data by a wireless
client. (The router replaces the multicast MAC-address with the physical MAC-address of the wireless client. If
there is more than one wireless client interested in the same multicast group, the router will revert to
multicasting the stream immediately. When one or more wireless clients leave a group, and the router
determines that only a single wireless client is interested in the stream, it will once again unicast the stream.)
This feature is only available if IGMP Snooping is enabled.
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.
Netopia Router
WAN Configuration...
System Configuration...
Utilities & Diagnostics...
Statistics & Logs...
Quick View...
®
Routers use a protocol
"Multicast Forwarding" on
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