Section 3 – Configuration 
D-Link DSL-2642B User Manual 
30 
Obtain an IP address automatically: 
Click the radio button to 
automatically obtain an IP address from the DHCP server. 
Option 60 Vendor ID:
The option code 60 used to identify Vendor class.
Option 61 IAID:
Identity Association ID (IAID) assigns an IAID to 
individual interfaces. If the device is functioning with a single DHCP 
client identity, it must use value 1 for IAID for all DHCP interactions. If 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. 
Option 61 DUID: 
Enter the unique name of the interface when 
exchange the DHCP messages. 
Option 125:
Click the 
Enable
radio button to allow DHCP server to be 
pre-configured with policy for 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:
Click the radio button to use static 
IP for the connection. 
WAN IP Address: 
Enter the static IP address for the connection. 
WAN Subnet mask: 
Enter the subnet mask of the static IP address. 
WAN gateway IP Address: 
Enter the gateway of the static IP address.