User's Manual
Table Of Contents

18D-Link DIR-645 User Manual
Section 3 - Software Configuration
Secondary DNS:
Enter the Secondary DNS IP address used here. This field is normally optional. Only one DNS address is required for a functional Internet connection,
but using a second DNS address provides more stability.
MTU:
Maximum Transmission Unit - you may need to change the MTU for optimal performance with your specific ISP. 1500 is the default MTU.
MAC Address:
The default MAC Address is set to the Internet port’s physical interface MAC address on the Broadband Router. It is not recommended that you change
the default MAC address unless required by your ISP. You can use the Clone Your PC’s MAC Address button to replace the Internet port’s MAC
address with the MAC address of your Ethernet card.
My Internet Connection is: Static IP
Another Internet Connection type is Static IP. This option allows the user to manually
configure the Static IP Internet Connection type. Normally the information entered will
be supplied by your ISP.
After selecting Static IP, the following parameters will be available for configuration:
IP Address:
Enter the Static IP address provided by the ISP here.
Subnet Mask:
Enter the Subnet Mask provided by the ISP here.
Default Gateway:
Enter the Gateway IP address provided by the ISP here.
Primary DNS:
Enter the Primary DNS IP address used here.
Secondary DNS:
Enter the Secondary DNS IP address used here. This field
is normally optional. Only one DNS address is required for
a functional Internet connection, but using a second DNS
address provides more stability.
MTU:
Maximum Transmission Unit - you may need to change the
MTU for optimal performance with your specific ISP. 1500
is the default MTU.
MAC Address:
The default MAC Address is set to the Internet port’s physical interface MAC address on the Broadband Router. It is not recommended that you change
the default MAC address unless required by your ISP. You can use the Clone Your PC’s MAC Address button to replace the Internet port’s MAC
address with the MAC address of your Ethernet card.










