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6.6.5
RIP Setup
RIP (Routing Information Protocol) allows a router to exchange routing information with
other routers. The
RIP Direction
field controls the sending and receiving of RIP packets.
When set to:
Both -
the ZyXEL Device will broadcast its routing table periodically and incorporate the
RIP information that it receives.
In Only -
the ZyXEL Device will not send any RIP packets but will accept all RIP packets
received.
Out Only -
the ZyXEL Device will send out RIP packets but will not accept any RIP
packets received.
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.
6.6.6
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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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 without changing the network
settings, even when the IP addresses of the computer and the ZyXEL Device are not in the
same subnet.
Figure 47
Any IP Example
The Any IP feature does not apply to a computer using either a dynamic IP address or a static
IP address that is in the same subnet as the ZyXEL Device’s IP address.
"
You must
enable NAT/SUA to use the Any IP feature on the ZyXEL Device.
How Any IP Works
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol address (IP
address) to a physical machine address, also known as a Media Access Control or MAC
address, on the local area network. IP routing table is defined on IP Ethernet devices (the
ZyXEL Device) to decide which hop to use,
to help forward data along to its specified
destination.
192.168.1.1
192.168.10.1
192.168.10.1
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The following lists out the steps taken, when a computer tries to access the Internet for the first
time through the ZyXEL Device.
1
When a computer (which is in a different subnet) first attempts to access the Internet, it
sends packets to its default gateway (which is not the ZyXEL Device) by looking at the
MAC address in its ARP table.
2
When the computer cannot locate the default gateway, an ARP request is broadcast on
the LAN.
3
The ZyXEL Device receives the ARP request and replies to the computer with its own
MAC address.
4
The computer updates the MAC address for the default gateway to the ARP table. Once
the ARP table is updated, the computer is able to access the Internet through the ZyXEL
Device.
5
When the ZyXEL Device receives packets from the computer, it creates an entry in the
IP routing table so it can properly forward packets intended for the computer.
After all the routing information is updated, the computer can access the ZyXEL Device and
the Internet as if it is in the same subnet as the ZyXEL Device.
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105
C
HAPTER
7
Wireless LAN
7.1
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.
Configuring Quality of Service (QoS) to optimize your network’s performance.
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.
7.1.1
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 7.2 on page 107
) 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 7.3 on page 115
) to set up multiple wireless
networks on your ZyXEL Device.
Use the
WPS
screen (see
Section 7.4 on page 117
) 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 7.5 on page 118
)
screen to set up WPS by pressing a
button or using a PIN.
Use the
WDS
screen (see
Section 7.6 on page 119
) to set up a Wireless Distribution
System, in which the ZyXEL Device acts as a bridge with other ZyXEL access points.
Use the
QoS
screen (see
Section 7.7 on page 120
) to enable or disable Quality of Service.
Use the
Scheduling
screen (see
Section 7.8 on page 121
) to configure the dates/times to
enable or disable the wireless LAN.
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.

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