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TL-R402M
Cable/DSL Router User Guide
14
Figure 4-4 WAN - Dynamic IP
This page displays the WAN IP parameters assigned dynamically by your ISP, including IP
address, Subnet Mask, Default Gateway, etc. Click the
Renew
button to renew the IP parameters
from your ISP. Click the
Release
button to release the IP parameters.
¾
MTU Size:
The normal MTU (Maximum Transmission Unit) value for most Ethernet
networks is 1500 Bytes. For some ISPs you need to reduce the MTU. But this is rarely
required, and should not be done unless you are sure it is necessary for your ISP connection
¾
If your ISP gives you one or two DNS addresses, select
Use These DNS Servers
and enter
the primary and secondary addresses into the correct fields. Otherwise, the DNS servers will
be assigned dynamically from ISP
¾
Get IP with Unicast DHCP:
A few ISPs' DHCP servers do not support the broadcast
applications. If you cannot get the IP address normally, you can choose this option. (You
generally need not check this option)
)
Note:
If you get Address not found errors when you go to a Web site, it is likely that your DNS servers
are set up improperly. You should contact your ISP to get DNS server addresses.
2.
If you choose
Static IP,
you should have fixed IP parameters specified by your ISP. The
Static IP settings page will appear, shown in Figure 4-5:
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TL-R402M
Cable/DSL Router User Guide
15
Figure 4-5 WAN - Static IP
You should type the following parameters into the spaces provided:
¾
IP Address
-
Enter the IP address in dotted-decimal notation provided by your ISP
¾
Subnet Mask
-
Enter the subnet Mask in dotted-decimal notation provided by your ISP,
usually is 255.255.255.0
¾
Default Gateway
: (Optional) Enter the gateway IP address in dotted-decimal notation
provided by your ISP
¾
MTU Size -
The normal MTU (Maximum Transmission Unit) value for most Ethernet
networks is 1500 Bytes. For some ISPs you may need to modify the MTU. But this is rarely
required, and should not be done unless you are sure it is necessary for your ISP connection
¾
Primary DNS -
(Optional) Type the DNS address in dotted-decimal notation provided by
your ISP
¾
Secondary DNS -
(Optional) Type another DNS address in dotted-decimal notation
provided by your ISP if provided
3.
If you choose
PPPoE
, you should enter the following parameters (Figure 4-6):
Page 23 / 61
TL-R402M
Cable/DSL Router User Guide
16
Figure 4-6 WAN - PPPoE
¾
User Name/Password -
Enter the User Name and Password provided by your ISP. These
fields are case-sensitive
¾
Connect on Demand -
You can configure the router to disconnect your Internet connection
after a specified period of inactivity (
Max Idle Time
). If your Internet connection has been
terminated due to inactivity,
Connect on Demand
enables the router to automatically
re-establish your connection as soon as you attempt to access the Internet again. If you
wish to activate
Connect on Demand
, click the radio button. If you want your Internet
connection to remain active at all times, enter 0 in the
Max Idle Time
field. Otherwise, enter
the number of minutes you want to have elapsed before your Internet connection
terminates.
Caution
:
Sometimes the connection cannot be disconnected although you specify a time to Max Idle
Time. This is because there may still be active applications in the background, which may
cause fee accounted by your ISP.
¾
Connect Automatically -
Connect automatically after the router is disconnected. To use
this option, click the radio button
¾
Connect Manually -
You can configure the router to make it connect or disconnect
manually. After a specified period of inactivity (
Max Idle Time
), the router will disconnect
your Internet connection, and not be able to re-establish your connection automatically as
soon as you attempt to access the Internet again. To use this option, click the radio button. If
you want your Internet connection to remain active at all times, enter 0 in the
Max Idle Time
field. Otherwise, enter the number in minutes that you wish to have the Internet connecting
last unless a new link is requested
Page 24 / 61
TL-R402M
Cable/DSL Router User Guide
17
Caution
:
Sometimes the connection cannot be disconnected although you specify a time to Max Idle
Time. This is because there may still be active applications in the background, which may
cause fee accounted by your ISP.
Click the
Connect
button to connect immediately, Click the
Disconnect
button to disconnect
immediately.
Click the
Advanced Settings
button to set up the advanced option, the page shown in Figure 4-7
will then appear:
Figure 4-7 PPPoE Advanced Settings
¾
Packet MTU -
The default MTU size is 1492 bytes, which is usually fine. For some ISPs, you
need modify the MTU. This should not be done unless you are sure it is necessary for your
ISP
¾
Service Name/AC Name -
The service name and AC (Access Concentrator) name, this
should not be done unless you are sure it is necessary for your ISP
¾
ISP Specified IP Address -
If you know that your ISP does not automatically transmit your
IP address to the router during login, click “
Use the IP Address specified by ISP
” check
box and enter the IP address in dotted-decimal notation, which your ISP provided
¾
Detect Online Interval -
The default value is 0, you can input the value between 0 and 120.
The router will detect Access Concentrator online at every interval between seconds. If the
value is 0,
it
means do not detect
¾
DNS IP Address -
If you know that your ISP does not automatically transmit DNS
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TL-R402M
Cable/DSL Router User Guide
18
addresses to the router during login, click “
Use the following DNS servers
” checkbox and
enter the IP address in dotted-decimal notation of your ISP’s primary DNS server. If a
secondary DNS server address is available, enter it as well.
Click the
Save
button to save your settings
4.
If you choose
L2TP
, you should enter the following parameters (Figure 4-8):
Figure 4-8 WAN – L2TP
For more details, please refer to your ISP.
¾
User
Name
/Password -
Enter the User Name and Password provided by your ISP. These
fields are case-sensitive
¾
Connect
/Disconnect
-
Click the button, you can handle the on-line connection or
disconnection
¾
Dynamic
IP/Static IP
-
Enter the IP address in dotted-decimal notation provided by your ISP
¾
Server IP Address/Name -
Please type the correct Server IP Address/Name which your
ISP
provided
¾
MTU Size (in bytes) -
The
default
value is 1460, which is usually fine. For some ISPs, you

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