1. Turn the modem off, and then turn it back on. Then turn the router power off, and then turn it back on. This is also known as power cycling the modem and the router.
Power cycle the modem first, and then power cycle the router. To power cycle these devices, you should follow your manufacturer’s specific instructions. Here are some general steps: a. Remove the power supply from your device.
b. Leave the device unplugged for 15 to 30 seconds.
c. Reattach the power supply to the modem by following the device manufacturer’s instructions.
d. Wait several minutes for the device to start and to establish a connection with your broadband provider.
e. Verify that the modem shows the appropriate power and Internet connection indicator lights by following the manufacturer’s instructions.
2. If power cycling your modem and router does not resolve the problem, try connecting the Xbox 360 console to Xbox LIVE by using the modem only. This eliminates any configuration problems on the router. If this setup works without the router, there is probably a configuration issue with the router. See the manufacturer’s documentation that is included with the router or contact the technical support group for the router.
3. Verify that your router's Dynamic Host Configuration Protocol (DHCP) service has been enabled. DHCP enables the router to assign IP addresses to the computers and consoles on your network when you go online. If you need help with this, see the manufacturer’s documentation that is included with the router or contact the technical support group for the router.
4. If you manually entered an IP address, gateway, subnet mask and/or DNS servers in the Network Settings area of the Xbox Dashboard , verify that it they are correct. At this point, you can also set your IP settings to Automatic. To do this, follow these steps:a. Move to the System area.
b. Select Network Settings.
c. Select Automatic.
5. If your ISP requires Point-to-Point Protocol over Ethernet (PPPoE) settings, try connecting to only the modem after you enter these settings in the Network Settings area of the Xbox Dashboard. Network Settings area of the Xbox Dashboard.
Note Some ISPs may require Point-to-Point Protocol over Ethernet (http://www.xbox.com/en-US/support/connecttolive/xbox360/resources/glossary.htm#ethernet
) (PPPoE) settings, This means that you may need settings such as a username and password in order to gain access to your ISP’s network. If you are unsure whether you have to enter these settings, please contact your ISP support group. At this point, if you can connect directly to the modem, see your router documentation to configure the PPPoE settings correctly on the router.
6. If you are receiving an IP conflict error in the More Info section of the Xbox Dashboard, turn off all devices on the network. Try to connect to Xbox LIVE with only the modem and Xbox 360 console connected.
If this works, there may be a configuration issue on the router’s Dynamic Host Configuration Protocol (DHCP) server. DHCP enables the router to assign temporary IP addresses to the computers on your network when you go online. If you need help with understanding DHCP or the configuration, see the manufacturer’s documentation that is included with the router