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Page 76 / 228 Scroll up to view Page 71 - 75
Chapter 5 Wireless LAN
ericom D1000 modem User’s Guide
76
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ericom D1000 modem User’s Guide
77
C
HAPTER
6
Home Networking
6.1
Overview
A Local Area Network (LAN) is a shared communication system to which many networking devices
are connected. It is usually located in one immediate area such as a building or floor of a building.
Use the LAN screens to help you configure a LAN DHCP server and manage IP addresses.
6.1.1
What You Can Do in the LAN Screens
•
Use the
LAN Setup
screen to set the LAN IP address, subnet mask, and DHCP settings of your
Device (
Section 6.2 on page 79
).
•
Use the
Static DHCP
screen to assign IP addresses on the LAN to specific individual computers
based on their MAC Addresses (
Section 6.3 on page 81
).
•
Use the
IP Alias
screen (
Section 6.6 on page 84
) to change your Device’s IP alias settings.
•
Use the
UPnP
screen to enable UPnP and UPnP NAT traversal on the Device (
Section 6.5 on page
83
).
•
Use the
IPv6 LAN Setup
screen (
Section 6.6 on page 84
) to configure the IPv6 settings on your
Device’s LAN interface.
•
Use the
File Sharing
screen (
Section 6.7 on page 88
) to set up file sharing via the Device.
•
Use the
Print Server
screen (
Section 6.8 on page 91
) to enable the print server function on the
Device.
DSL
LAN
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Chapter 6 Home Networking
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78
6.1.2
What You Need To Know
6.1.2.1
About LAN
IP Address
IP addresses identify individual devices on a network. Every networking device (including
computers, servers, routers, printers, etc.) needs an IP address to communicate across the
network. These networking devices are also known as hosts.
Subnet Mask
Subnet masks determine the maximum number of possible hosts on a network. You can also use
subnet masks to divide one network into multiple sub-networks.
DHCP
A DHCP (Dynamic Host Configuration Protocol) server can assign your Device an IP address, subnet
mask, DNS and other routing information when it's turned on.
DNS
DNS (Domain Name System) is for mapping a domain name to its corresponding IP address and
vice versa. The DNS server is extremely important because without it, you must know the IP
address of a networking device before you can access it.
6.1.2.2
About UPnP
Identifying UPnP Devices
UPnP hardware is identified as an icon in the Network Connections folder (Windows XP). Each UPnP
compatible device installed on your network will appear as a separate icon. Selecting the icon of a
UPnP device will allow you to access the information and properties of that device.
NAT Traversal
UPnP NAT traversal automates the process of allowing an application to operate through NAT. UPnP
network devices can automatically configure network addressing, announce their presence in the
network to other UPnP devices and enable exchange of simple product and service descriptions.
NAT traversal allows the following:
•
Dynamic port mapping
•
Learning public IP addresses
•
Assigning lease times to mappings
Windows Messenger is an example of an application that supports NAT traversal and UPnP.
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Chapter 6 Home Networking
ericom D1000 modem User’s Guide
79
Cautions with UPnP
The automated nature of NAT traversal applications in establishing their own services and opening
firewall ports may present network security issues. Network information and configuration may also
be obtained and modified by users in some network environments.
When a UPnP device joins a network, it announces its presence with a multicast message. For
security reasons, the Device allows multicast messages on the LAN only.
All UPnP-enabled devices may communicate freely with each other without additional configuration.
Disable UPnP if this is not your intention.
Finding Out More
See
Section 6.11 on page 103
for technical background information on LANs.
6.1.3
Before You Begin
Find out the MAC addresses of your network devices if you intend to add them to the DHCP Client
List screen.
6.2
The LAN Setup Screen
Use this screen to set the Local Area Network IP address, subnet mask and advanced networking
settings such as RIP, multicast of your Device. Click
Network Setting > Home Networking
to
open the
LAN Setup
screen.
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Chapter 6 Home Networking
ericom D1000 modem User’s Guide
80
Figure 40
Network Setting > Home Networking > LAN Setup
The following table describes the fields in this screen.
Table 21
Network Setting > Home Networking > LAN Setup
LABEL
DESCRIPTION
LAN IP Setup
IP Address
Enter the LAN IP address you want to assign to your Device in dotted decimal
notation, for example, 192.168.1.254 (factory default).
Subnet Mask
Type the subnet mask of your network in dotted decimal notation, for example
255.255.255.0 (factory default). Your Device automatically computes the subnet mask
based on the IP Address you enter, so do not change this field unless you are
instructed to do so.
RIP Version
RIP (Routing Information Protocol) allows a router to exchange routing information
with other routers. Select the RIP version from
RIP1
and
RIP2-B/RIP2-M
.
Direction
Use this field to control how much routing information the VDSL Router sends and
receives on the subnet. Select the
RIP Direction
from
None
,
Both
,
IN Only
and
OUT Only
.
Multicast
IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish
membership in a multicast group. The Device supports
IGMP v1/IGMP v2/IGMP
v3
. Select
None
to disable it.
IGMP Snooping
Select
Enabled
to activate IGMP Snooping. This allows the Device to passively learn
memberships in multicast groups. Otherwise, select
Disabled
to deactivate it.
DHCP Server State

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