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Page 36 / 77 Scroll up to view Page 31 - 35
TD-8840T
ADSL2+ Modem Router User Guide
30
Figure 4-16
¾
Start IP Address:
Enter a value for the DHCP server to start with when issuing IP addresses.
Because the default IP address for the Modem Router is 192.168.1.1, the default Start IP
Address is
192.168.1.100
, and the Start IP Address must be 192.168.1.100 or greater, but
smaller than 192.168.1.254.
¾
End IP Address:
Enter a value for the DHCP server to end with when issuing IP addresses.
The End IP Address must be smaller than 192.168.1.254. The default End IP Address is
192.168.1.254
.
¾
Address Lease Time:
The Leased Time is the amount of time in which a network user will be
allowed connection to the Modem Router with their current dynamic IP address. Enter the
amount of time, in hours, then the user will be “leased” this dynamic IP address. After the
dynamic IP address has expired, the user will be automatically assigned a new dynamic IP
address. The default is
24
hours.
¾
Default Gateway -
(Optional.) It is suggested to input the IP address of the LAN port of the
Modem Router. The default value is 192.168.1.1.
¾
Default Domain -
(Optional.) Input the domain name of your network.
¾
Primary DNS -
(Optional.) Input the DNS IP address provided by your ISP or consult your
ISP.
¾
Secondary DNS -
(Optional.) Input the IP address of another DNS server if your ISP
provides two DNS servers.
¾
DHCP Relay:
Select
Relay
, then you will see the next screen, and the Modem Router will
work as a DHCP Relay. A DHCP relay is a computer that forwards DHCP data between
computers that request IP addresses and the DHCP server that assigns the addresses. Each
of the device's interfaces can be configured as a DHCP relay. If it is enabled, the DHCP
requests from local PCs will forward to the DHCP server runs on WAN side. To have this
function working properly, please run on router mode only, disable the DHCP server on the
LAN port, and make sure the routing table has the correct routing entry.
Page 37 / 77
TD-8840T
ADSL2+ Modem Router User Guide
31
)
Note:
1)
To use the DHCP server function of the Modem Router, you must configure all computers on
the LAN as "Obtain an IP Address automatically".
2)
You have to disable NAT of the WAN connections, or the DHCP Relay may not take effect.
3)
If you select
Disabled
, the DHCP function will not take effect.
Click the
Save
button to save your settings.
4.5.2 Clients List
Choose menu “
DHCP Server
”
Æ
“
Clients List
”, you can view the information about the clients
attached to the Modem Router in the screen as shown in Figure 4-17.
Figure 4-17
¾
Client Name
:
The name of the DHCP client
¾
MAC Address
:
The MAC address of the DHCP client
¾
IP Address
:
The IP address that the Modem Router has allocated to the DHCP client
¾
Valid Time
:
The time of the DHCP client leased. After the dynamic IP address has expired,
a new dynamic IP address will be automatically assigned to the user.
You cannot change any of the values on this page. To update this page and to show the current
attached devices, click the
Refresh
button.
4.5.3 Address Reservation
Choose menu “
DHCP Server
”
Æ
“
Address Reservation
”, you can view and add a reserved
address for clients via the next screen (shown in Figure 4-18).When you specify a reserved IP
address for a PC on the LAN, that PC will always receive the same IP address each time when it
accesses the DHCP server. Reserved IP addresses should be assigned to the servers that require
permanent IP settings.
Page 38 / 77
TD-8840T
ADSL2+ Modem Router User Guide
32
Figure 4-18
¾
MAC Address:
The MAC address of the PC for which you want to reserve an IP address.
¾
IP Address:
The IP address reserved for the PC by the Modem Router.
¾
Status:
The status of this entry either
Enabled
or
Disabled
.
To Reserve an IP address:
1.
Click the
Add New
button. Then Figure 4-19 will pop up.
2.
Enter the MAC address (in XX:XX:XX:XX:XX:XX format.) and IP address (in dotted-decimal
notation) of the computer for which you want to reserve an IP address.
3.
Click the
Save
button.
Figure 4-19
To modify or delete an existing entry:
1.
Click the
Edit
in the entry you want to modify. If you want to delete the entry, click the
Delete
.
2.
Modify the information.
3.
Click the
Save
button.
Click the
Enable/Disable Selected
button to make selected entries enabled/disabled.
Click the
Delete Selected
button to selected entries.
4.5.4 Conditional Pool
Choose menu “
DHCP Server
”
Æ
“
Conditional Pool
”, you can see the next screen (shown in
Figure 4-20). This page displays vendor class settings and allows you to set parameters for
vendor class by clicking corresponding buttons.
Page 39 / 77
TD-8840T
ADSL2+ Modem Router User Guide
33
Figure 4-20
To add a
vendor class:
1.
Click the
Add New
button. Then Figure 4-21 will pop up.
2.
Enter parameters for the vendor class.
Click the
Save
button.
Figure 4-21
To modify or delete an existing entry:
4.
Click the
Edit
in the entry you want to modify. If you want to delete the entry, click the
Delete
.
5.
Modify the information.
6.
Click the
Save
button.
Click the
Enable/Disable Selected
button to make selected entries enabled/disabled.
Click the
Delete Selected
button to selected entries.
4.6 Route Settings
Choose “
Route Settings
”, it includes three menus
: Default Gateway
,
Static Route and RIP
Settings
. The detailed descriptions are provided below.
Page 40 / 77
TD-8840T
ADSL2+ Modem Router User Guide
34
4.6.1 Default Gateway
Choose “
Route Settings
”
Æ
“
Default Gateway
”, you can see the Default Gateway screen. You
can select a WAN Interface from the drop-down list as the system default gateway.
Figure 4-22
Click the
Add Interface
button, you can add WAN Interfaces.
Click the
Save
button to save your settings.
4.6.2 Static Route
Choose “
Route Settings
”
Æ
“
Static Route
”. You can see the Static Route screen, this screen
allows you to configure the static routes (shown in Figure 4-23). A static route is a pre-determined
path that network information must travel to reach a specific host or network.
Figure 4-23
To add static routing entries:
1.
Click the
Add New
button in Figure 4-23, and you will see the screen as shown in Figure
4-24.

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