TP-Link TD-W8968 User Manual page 27


Note:
1) The response message from a DHCP server typically contains a number of configuration
parameters (DHCP options) for the modem router. The DHCP options include IP network
information, and also the vendor-specific options. In some cases, the modem router is
implemented to perform user-defined operations (as shown below). You can implement
your own treatment of all such options.
If the modem router is functioning as a DHCP client, it must identify itself in option 61
2)
(client-identifier) in every DHCP message. DUID/IAID is portion of option 61.
 Option 60 Vendor ID:
 Option 61 IAID:
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 device may use IAID value 1 for the virtual circuit
corresponding to the first connection object in the data model and value 2 for the
second connection object in the data model.
Option 61 DUID:

server is to use as its DUID (DHCP Unique Identifier). You must enter a value for this
parameter or the server will not start. When the server starts, the DUID is written to the
system log.
Option 125:

handling classes of devices in a certain way without requiring DHCP server to be able
to parse the unique format used in client-identifier option.
Use the following Static IP address:

please select this option, and then enter the
gateway IP Address
5. You will see the next screen as below. You can enable the NAT,
Multicast. If you are not sure about the settings, just leave the default settings. Click Next.
The option code 60 is used to identify Vendor class.
IAID (Identity Association ID) assigns an Identity Association ID to
Specifies the name of the interface whose link-layer address the
The option 125 allows DHCP server to be pre-configured with policy for
If you are provided with a static IP/gateway Address,
manually.
WAN IP Address, WAN Subnet Mask
23
TD-W8968 User Guide
and WAN
SPI Firewall, and IGMP