D-Link DIR-615 User Manual page 24

Section  - Configuration
The default MAC Address is set to the Internet port's physical interface MAC address on the Broadband Router. It is not
MAC Address:
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.
D-Link DIR-615 User Manual