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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.
7.6.6
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. 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.
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C
HAPTER
8
Wireless LAN
8.1
Overview
This chapter describes how to perform tasks related to setting up and optimizing
your wireless network, including the following.
Turning the wireless connection on or off.
Configuring a name, wireless channel and security for the network.
Using WiFi Protected Setup (WPS) to configure your wireless network.
Setting up multiple wireless networks.
Using a MAC (Media Access Control) address filter to restrict access to the
wireless network.
Setting up a Wireless Distribution System (WDS).
Performing other performance-related wireless tasks.
8.1.1
What You Can Do in the Wireless LAN Screens
This section describes the ZyXEL Device’s
Network > Wireless LAN
screens. Use
these screens to set up your ZyXEL Device’s wireless connection.
Use the
AP
screen (see
Section 8.2 on page 105
) to turn the wireless
connection on or off, set up wireless security, configure the MAC filter, and make
other basic configuration changes.
Use the
More AP
screen (see
Section 8.3 on page 113
) to set up multiple
wireless networks on your ZyXEL Device.
Use the
WPS
screen (see
Section 8.4 on page 115
) to enable or disable WPS,
generate a security PIN (Personal Identification Number) and see information
about the ZyXEL Device’s WPS status.
Use the
WPS Station
(see
Section 8.5 on page 116
)
screen to set up WPS by
pressing a button or using a PIN.
Use the
WDS
screen (see
Section 8.6 on page 117
) to set up a Wireless
Distribution System, in which the ZyXEL Device acts as a bridge with other
ZyXEL access points.
Use the
Scheduling
screen (see
Section 8.7 on page 119
) to configure the
dates/times to enable or disable the wireless LAN.
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You don’t necessarily need to use all these screens to set up your wireless
connection. For example, you may just want to set up a network name, a wireless
radio channel and security in the
AP
screen.
8.1.2
What You Need to Know About Wireless
Wireless Basics
“Wireless” is essentially radio communication. In the same way that walkie-talkie
radios send and receive information over the airwaves, wireless networking
devices exchange information with one another. A wireless networking device is
just like a radio that lets your computer exchange information with radios
attached to other computers. Like walkie-talkies, most wireless networking
devices operate at radio frequency bands that are open to the public and do not
require a license to use. However, wireless networking is different from that of
most traditional radio communications in that there a number of wireless
networking standards available with different methods of data encryption.
SSID
Each network must have a name, referred to as the SSID - “Service Set
IDentifier”. The “service set” is the network, so the “service set identifier” is the
network’s name. This helps you identify your wireless network when wireless
networks’ coverage areas overlap and you have a variety of networks to choose
from.
MAC Address Filter
Every Ethernet device has a unique MAC (Media Access Control) address. The MAC
address consists of twelve hexadecimal characters (0-9, and A to F), and it is
usually written in the following format: “0A:A0:00:BB:CC:DD”.
The MAC address filter controls access to the wireless network. You can use the
MAC address of each wireless client to allow or deny access to the wireless
network.
Finding Out More
See
Section 8.8 on page 120
for advanced technical information on wireless
networks.
8.1.3
Before You Start
Before you start using these screens, ask yourself the following questions. See
Section 8.1.2 on page 104
if some of the terms used here are not familiar to you.
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What wireless standards do the other wireless devices in your network support
(IEEE 802.11g, for example)? What is the most appropriate standard to use?
What security options do the other wireless devices in your network support
(WPA-PSK, for example)? What is the strongest security option supported by all
the devices in your network?
Do the other wireless devices in your network support WPS (Wi-Fi Protected
Setup)? If so, you can set up a well-secured network very easily.
Even if some of your devices support WPS and some do not, you can use WPS to
set up your network and then add the non-WPS devices manually, although this
is somewhat more complicated to do.
What advanced options do you want to configure, if any? If you want to
configure advanced options such as Quality of Service, ensure that you know
precisely what you want to do. If you do not want to configure advanced
options, leave them as they are.
8.2
The AP Screen
Use this screen to configure the wireless settings of your ZyXEL Device. Click
Network > Wireless LAN
to open the
AP
screen.
Figure 43
Network > Wireless LAN > AP

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