Multicast; Any Ip - ZyXEL Communications P-2612HW-F1 User Manual

• None - the ZyXEL Device will not send any RIP packets and will ignore any RIP
packets received.
The Version field controls the format and the broadcasting method of the RIP
packets that the ZyXEL Device sends (it recognizes both formats when receiving).
RIP-1 is universally supported; but RIP-2 carries more information. RIP-1 is
probably adequate for most networks, unless you have an unusual network
topology.
Both RIP-2B and RIP-2M sends the routing data in RIP-2 format; the difference
being that RIP-2B uses subnet broadcasting while RIP-2M uses multicasting.

7.5.6 Multicast

Traditionally, IP packets are transmitted in one of either two ways - Unicast (1
sender - 1 recipient) or Broadcast (1 sender - everybody on the network).
Multicast delivers IP packets to a group of hosts on the network - not everybody
and not just 1.
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. 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 both IGMP version 1 (IGMP-v1) and IGMP version 2
(IGMP-v2). 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.

7.5.7 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
P-2612HW-F1 User's Guide
Chapter 7 LAN Setup
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