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Troubleshooting
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 N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700
Internet LED Is Red
If the Internet LED is red, the device could not connect to the Internet. Verify the following:
•     
Check that your login credentials are correct. See 
page 24 for more information.
•     
Check that the information you entered on the Basic Settings screen is correct. See 
•     
Check with your ISP to verify that the multiplexing method, VPI, and VCI settings on the 
ADSL settings screen are correct.
•     
Find out if the ISP is having a problem. If it is, wait until that problem is cleared up and try 
again.
Cannot Obtain an Internet IP Address
If your wireless modem router cannot access the Internet, and your Internet LED is green or 
blinking green, check whether the wireless modem router can obtain an Internet IP address 
from the ISP. Unless you have been assigned a static IP address, your wireless modem 
router has to request an IP address from the ISP. 
You can determine whether the request was successful as follows:
1. 
Access the router menus at 
http://192.168.0.1
 and log in.
2. 
Under Maintenance, select Router Status and check that an IP address shows for the WAN 
port. If 0.0.0.0 shows, your wireless modem router has not obtained an IP address from your 
ISP.
If your router cannot obtain an IP address from the ISP, the problem might be one of the 
following:
•     
If you have selected a login program, the service name, user name, or password might be 
incorrect. See 
•     
Your ISP might check for your computer’s host name. Assign the computer host name of 
your ISP account to the wireless modem router in the browser-based Setup Wizard. See 
on page 27 for more information.
•     
Your ISP allows only one Ethernet MAC address to connect to the Internet, and might 
check for your computer’s MAC address. In this case, do one of the following:
-
Inform your ISP that you have bought a new network device and ask them to use the 
router’s MAC address.
-
Configure your router to spoof your computer’s MAC address through the Basic 
Settings screen. See