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Page 106 / 229 Scroll up to view Page 101 - 105
Chapter 12 LAN
NBG6716 User’s Guide
106
Figure 71
LAN and WAN IP Addresses
The LAN parameters of the NBG6716 in router mode are preset in the factory with the following
values:
•
IP address of 192.168.1.1 with subnet mask of 255.255.255.0 (24 bits)
•
DHCP server enabled with 32 client IP addresses starting from 192.168.1.33.
These parameters should work for the majority of installations. If your ISP gives you explicit DNS
server address(es), read the embedded Web Configurator help regarding what fields need to be
configured.
12.3.1
IP Alias
IP alias allows you to partition a physical network into different logical networks over the same
Ethernet interface. The NBG6716 supports three logical LAN interfaces via its single physical
Ethernet interface with the NBG6716 itself as the gateway for each LAN network.
12.4
LAN IP Screen
Use this screen to change the IP address for your NBG6716. Click
Network > LAN > IP
.
Figure 72
Network > LAN > IP
Page 107 / 229
Chapter 12 LAN
NBG6716 User’s Guide
107
The following table describes the labels in this screen.
12.5
IP Alias Screen
Use this screen to have the NBG6716 apply IP alias to create LAN subnets. Click
LAN
IP Alias
.
Figure 73
Network > LAN > IP Alias
The following table describes the labels in this screen.
Table 44
Network > LAN > IP
LABEL
DESCRIPTION
IP Address
Type the IP address of your NBG6716 in dotted decimal notation.
IP Subnet Mask
The subnet mask specifies the network number portion of an IP address. Your NBG6716
will automatically calculate the subnet mask based on the IP address that you assign.
Unless you are implementing subnetting, use the subnet mask computed by the
NBG6716.
Apply
Click
Apply
to save your changes back to the NBG6716.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Table 45
Network > LAN > IP Alias
LABEL
DESCRIPTION
IP Alias 1, 2
Check this to enable IP alias to configure another LAN network for the NBG6716.
IP Address
Type the IP alias address of your NBG6716 in dotted decimal notation.
IP Subnet Mask
The subnet mask specifies the network number portion of an IP address. Your NBG6716
will automatically calculate the subnet mask based on the IP address that you assign.
Unless you are implementing subnetting, use the subnet mask computed by the
NBG6716.
Apply
Click
Apply
to save your changes back to the NBG6716.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Page 108 / 229
NBG6716 User’s Guide
108
C
HAPTER
13
DHCP Server
13.1
Overview
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to
obtain TCP/IP configuration at start-up from a server. You can configure the NBG6716’s LAN as a
DHCP server or disable it. When configured as a server, the NBG6716 provides the TCP/IP
configuration for the clients. If DHCP service is disabled, you must have another DHCP server on
your LAN, or else the computer must be manually configured.
13.1.1
What You Can Do
•
Use the
General
screen to enable the DHCP server (
Section 13.2 on page 109
).
•
Use the
Advanced
screen to assign IP addresses on the LAN to specific individual computers
based on their MAC Addresses (
Section 13.3 on page 109
).
•
Use the
Client List
screen to view the current DHCP client information (
Section 13.4 on page
111
).
13.1.2
What You Need To Know
The following terms and concepts may help as you read through this chapter.
LAN TCP/IP
The NBG6716 has built-in DHCP server capability that assigns IP addresses and DNS servers to
systems that support DHCP client capability.
IP Pool Setup
The NBG6716 is pre-configured with a pool of 32 IP addresses starting from 192.168.1.33 to
192.168.1.64. This configuration leaves 31 IP addresses (excluding the NBG6716 itself) in the
lower range (192.168.1.2 to 192.168.1.32) for other server computers, for instance, servers for
mail, FTP, TFTP, web, etc., that you may have.
MAC Addresses
Every Ethernet device has a unique MAC (Media Access Control) address. The MAC address is
assigned at the factory and consists of six pairs of hexadecimal characters, for example,
00:A0:C5:00:00:02. Find out the MAC addresses of your network devices if you intend to add them
to the
DHCP Client List
screen.
Page 109 / 229
Chapter 13 DHCP Server
NBG6716 User’s Guide
109
13.2
DHCP Server General Screen
Use this screen to enable the DHCP server. Click
Network
>
DHCP Server
.
The following screen
displays.
Figure 74
Network > DHCP Server > General
The following table describes the labels in this screen.
13.3
DHCP Server Advanced Screen
This screen allows you to assign IP addresses on the LAN to specific individual computers based on
their MAC addresses. You can also use this screen to configure the DNS server information that the
NBG6716 sends to the DHCP clients.
To change your NBG6716’s static DHCP settings, click
Network
>
DHCP Server
>
Advanced
. The
following screen displays.
Table 46
Network > DHCP Server > General
LABEL
DESCRIPTION
DHCP Server
Select
Enable
to activate DHCP for LAN.
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows
individual clients (computers) to obtain TCP/IP configuration at startup from a server.
Enable the DHCP server unless your ISP instructs you to do otherwise. Select
Disable
to stop the NBG6716 acting as a DHCP server. When configured as a server, the
NBG6716 provides TCP/IP configuration for the clients. If not, DHCP service is
disabled and you must have another DHCP server on your LAN, or else the computers
must be manually configured. When set as a server, fill in the following four fields.
IP Pool Starting
Address
This field specifies the first of the contiguous addresses in the IP address pool for LAN.
Pool Size
This field specifies the size, or count of the IP address pool for LAN.
Apply
Click
Apply
to save your changes back to the NBG6716.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Page 110 / 229
Chapter 13 DHCP Server
NBG6716 User’s Guide
110
Figure 75
Network > DHCP Server > Advanced
The following table describes the labels in this screen.
Table 47
Network > DHCP Server > Advanced
LABEL
DESCRIPTION
Static DHCP Table
#
This is the index number of the static IP table entry (row).
MAC Address
Type the MAC address (with colons) of a computer on your LAN.
IP Address
Type the LAN IP address of a computer on your LAN.
DNS Server
DNS Servers
Assigned by DHCP
Server
The NBG6716 passes a DNS (Domain Name System) server IP address (in the order you
specify here) to the DHCP clients. The NBG6716 only passes this information to the LAN
DHCP clients when you enable
DHCP Server
. When you disable
DHCP Server
, DHCP
service is disabled and you must have another DHCP server on your LAN, or else the
computers must have their DNS server addresses manually configured.

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