VII. Router Diagnostics

Vigor ADSL Router Troubleshooting Tips

Vigor 2820
Internet Connection

Welcome to the Vigor ADSL top setup tips. These notes supplement your full manual, distilling the most important information.

When you first set up your Vigor ADSL router, everything should go smoothly if you follow the instructions, but if you have problems, here is your checklist !

There are two parts to this guide. Part 1 covers getting your PCs talking to the router. Part 2 covers getting the router talking to your ISP and the Internet.

Note : If your line is ADSL2 or ADSL2+, be sure to select the relevant mode in the Internet Access Setup page, otherwise the router will connect using regular ADSL only.

Part 1

Part 1 - PCs/LAN communicating with Router

  1. Your PC should be connected to the router via a suitable Ethernet (RJ45) cable. Does the appropriate ethernet switch LED (1/2/3/4) light up (green = 100mb/s, Amber = 10mb/s) ? The Vigor2600's Ethernet ports are auto-sensing to speed and cable configuration, so crossover/straight or uplink/normal connections will all be automatically adjusted for.
  2. Every device on your network must an a unique IP address. The router's DHCP server facility will automatically allocate these to your client PCs, assuming that they are set to obtain their details automatically. The router's own IP address by default is and all local PCs must have an IP address within the same 'subnet' - for example or Only the last octet (and 8 bit binary number, represented in decimal - i.e. the number after the final dot) will vary - this is known as a class C subnet.
  3. Check that the PC is actually getting the IP details from the router. You can check this from the winipcfg utility. To run this, press the Windows Start button, select 'Run', type winipcfg


    In the above example, the PC has been given an IP address of and has been told that the default gateway (router) is at Ensure that your network card is selected in the top pulldown box (not 'PPP Adaptor'). If you click 'Release', the details should clear and 'Renew' should get them back.

    If you do not have the winipcfg utility, you can try ipconfig.exe from the MS-DOS command prompt :
    IP Config

    Winipcfg is not supplied as standard with Windows 2000, but you can download a Windows2000 version from here.

  4. In WindowsXP, you can check your PC's current IP address by opening Network Connections; if you select the LAN connection, the settings will appear on the left of the screen - like in the example below. Here we can see that the Network connection is enabled and that the PC has obtained an IP address of :
    WinXP Network Connection
    You can obtain the same information by right-clicking on the Network Connection's icon in the system tray and selecting 'Status' :
    WinXP Network Connection 3
  5. If your PC is not getting an IP address (as described in previous sections), you need to check that your PC's TCP/IP settings are correct. As mentioned earlier, we recommend that you make use of the router's DHCP facility which is enabled by default. From Windows98/Me Control Panel/Network, check your TCP/IP Properties are like this : Windows TCP/IP Settings 1 Windows TCP/IP Settings 2 Windows TCP/IP Settings 3 Windows TCP/IP Settings 4
  6. For Windows XP, the LAN/Network card setup is very similar to Windows 98/Me, but the screens look a little different. Once your network card (Ethernet 10/100BaseT) is installed, it may be automatically set up correctly by default. You can check the settings from your PC's 'Network Connections' menu :

    Windows XP Network Connections

    Select the TCP/IP protocol as shown below and click on 'properties' and then check that Obtain IP address & DNS Automatically are both selected :

  7. For Apple MacOS, to select and enable the DHCP client facility on your computer, the TCP/IP control panel should be set like this for MacOS 8/9 and X respectively :
    MacOS DHCP MacOS MacOSX setup
    Once the addresses have been allocated by the router, they will appear in the screen above.
  8. If you are not using DHCP (i.e. 'Obtain IP Address Automatically' as shown above) then you must manually give your PCs an IP address. This address must be within the same subnet as the router's own LAN IP address. This means that if the router is, then the other PCs must be numbered 192.168.1.nnn where 'nnn' is a number from 2 to 254. Additionally, each PC must have the 'Default Gateway' and 'DNS Server Address' set to the router's IP address ( unless you changed it). None of this is necessary if you are using DHCP, hence it's recommended to rely on DHCP whenever possible.
  9. To confirm the PC can see the router, you can use the Windows 'ping' utility. This sends a small packet to the router, which the router sends back, to confirm communication is fine. From an MS-DOS prompt, enter 'ping' - you should get replies with a time in milliseconds (e.g. 12ms).

    Guide Image

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