Any Ip - ZyXEL Communications P-660HW-Tx v3 User Manual

IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to
establish membership in a Multicast group - it is not used to carry user data. IGMP
version 2 (RFC 2236) is an improvement over version 1 (RFC 1112) but IGMP
version 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.
The ZyXEL Device supports IGMP version 1 (IGMP-v1), IGMP version 2 (IGMP-
v2) and IGMP version 3 (IGMP-v3). 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.

6.6.7 Any IP

Traditionally, you must set the IP addresses and the subnet masks of a computer
and the ZyXEL Device to be in the same subnet to allow the computer to access
the Internet (through the ZyXEL Device). In cases where your computer is
required to use a static IP address in another network, you may need to manually
configure the network settings of the computer every time you want to access the
Internet via the ZyXEL Device.
With the Any IP feature and NAT enabled, the ZyXEL Device allows a computer to
access the Internet without changing the network settings (such as IP address and
subnet mask) of the computer, when the IP addresses of the computer and the
ZyXEL Device are not in the same subnet. Whether a computer is set to use a
dynamic or static (fixed) IP address, you can simply connect the computer to the
ZyXEL Device and access the Internet.
The following figure depicts a scenario where a computer is set to use a static
private IP address in the corporate environment. In a residential house where a
ZyXEL Device is installed, you can still use the computer to access the Internet
P-660HW-Tx v3 User's Guide
Chapter 6 Local Network (LAN) Setup
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