User's Manual

Chapter 7 LAN Setup

P-660HN-Tx User’s Guide

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ersion 1 is still in wide use. IGMP version 3 supports source filtering, reporting or

ignoring traffic from specific source address to a particular host on the network. If

you would like to read more detailed information about interoperability between

IGMP version 2 and version 1, please see sections 4 and 5 of RFC 2236. The class

D IP address is used to identify host groups and can be in the range 224.0.0.0 to

239.255.255.255. The address 224.0.0.0 is not assigned to any group and is used

by IP multicast computers. The address 224.0.0.1 is used for query messages and

is assigned to the permanent group of all IP hosts (including gateways). All hosts

must join the 224.0.0.1 group in order to participate in IGMP. The address

224.0.0.2 is assigned to the multicast routers group.

At start up, the ZyXEL Device queries all directly connected networks to gather

group membership. After that, the ZyXEL Device periodically updates this

information. IP multicasting can be enabled/disabled on the ZyXEL Device LAN

and/or WAN interfaces in the web configurator (LAN; WAN). Select None to

disable IP multicasting on these interfaces.