User's Guide

TD-W8960N Wireless N ADSL2+ Modem Router User Guide
2. Click the Add button on the screen (as shown Figure 4-8). Select WAN Service Interface over
ATM PVC on the next screen (as shown Figure 4-9).
3. If your ISP provides an IPoE connection, select IPoE option for the WAN Service type on the
screen (as shown Figure 4-10), and click Next button to continue.
4. You should enter the following parameters to configure the WAN IP Address.
Figure 4-16
¾ Obtain an IP address automatically: Select this option, the Router will be able to obtain IP
network information dynamically from a DHCP server provided by your ISP.
)
Note:
1) The response message from a DHCP server typically contains a number of configuration
parameters (DHCP options) for the Router. The DHCP options include IP network information,
and also the vendor-specific options. In some cases, the Router is implemented to perform
user-defined operations (as shown below). You can implement your own treatment of all such
options.
2) If the Router is functioning as a DHCP client, it must identify itself in option 61 (client-identifier)
in every DHCP message. DUID/IAID is portion of option 61.
• Option 60 Vendor ID: The option code 60 used to identify Vendor class.
• Option 61 IAID: IAID (Identity Association ID) assigns an Identity Association ID to
individual interfaces. In cases where the device is functioning with a single DHCP client
identity, it must use value 1 for IAID for all DHCP interactions. In cases where the device is
functioning with multiple DHCP client identities, the values of IAID have to start at 1 for the
first identity and be incremented for each subsequent identity. For example, the device may
use IAID value 1 for the first physical interface and value 2 for the second. Alternatively, the
24