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Page 121 / 133 Scroll up to view Page 116 - 120
Troubleshooting
121
N300 Wireless ADSL2+ Modem Router DGN2200v4
•
You are using the correct cable.
Cannot Log In to the Modem Router
If you are unable to log in to the modem router from a computer on your local network, check
the following:
•
If you are using an Ethernet-connected computer, check the Ethernet connection
between the computer and the modem router as described in the previous section.
•
Make sure that your computer’s IP address is on the same subnet as the modem router.
If you are using the recommended addressing scheme, your computer’s address should
be in the range of 192.168.0.2 to 192.168.0.254.
•
If your computer’s IP address is shown as 169.254.x.x, recent versions of Windows and
Mac OS generate and assign an IP address if the computer cannot reach a DHCP server.
These autogenerated addresses are in the range of 169.254.x.x. If your IP address is in
this range, check the connection from the computer to the modem router, and reboot your
computer.
•
If your modem router’s IP address was changed and you do not know the current IP
address, clear the modem router’s configuration to factory defaults. This sets the modem
router’s IP address to 192.168.0.1. This procedure is explained in
Factory Settings
on
page
128.
•
Make sure that your browser has Java, JavaScript, or ActiveX enabled. If you are using
Internet Explorer, click
Refresh
to be sure that the Java applet is loaded.
•
Try quitting the browser and launching it again.
•
Make sure that you are using the correct login information. The factory default login name
is
admin
, and the password is
password
. Make sure that Caps Lock is off when you
enter this information.
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Troubleshooting
122
N300 Wireless ADSL2+ Modem Router DGN2200v4
Troubleshoot the Internet Connection
If your modem router is unable to access the Internet, check the ADSL connection, then the
WAN TCP/IP connection.
ADSL Link
If your modem router is unable to access the Internet, first determine whether you have an
ADSL link with the service provider. The state of this connection is indicated with the Internet
LED.
ADSL Link LED Is Green
If your ADSL link LED is green, you have a good ADSL connection. You can be confident that
the service provider has connected your line correctly and that your wiring is correct.
ADSL Link LED Is Blinking Green
If your ADSL link LED is blinking green, your modem router is attempting to make an ADSL
connection with the service provider. The LED should turn green within several minutes.
If the ADSL link LED does not turn green, disconnect all telephones on the line. If this solves
the problem, reconnect the telephones one at a time, being sure to use a microfilter on each
telephone. If the microfilters are connected correctly, you should be able to connect all your
telephones.
If disconnecting telephones does not result in a green ADSL link LED, there might be a
problem with your wiring. If the telephone company has tested the ADSL signal at your
network interface device (NID), then you might have poor-quality wiring in your house.
ADSL Link LED Is Off
If the ADSL link LED is off, disconnect all telephones on the line. If this solves the problem,
reconnect the telephones one at a time, being sure to use a microfilter on each telephone. If
the microfilters are connected correctly, you should be able to connect all your telephones.
If disconnecting telephones does not result in a green ADSL link LED, check for the following:
•
Check that the telephone company has made the connection to your line and tested it.
•
Verify that you are connected to the correct telephone line. If you have more than one
phone line, be sure that you are connected to the line with the ADSL service. It might be
necessary to use a swapper if your ADSL signal is on pins 1 and 4 or the RJ-11 jack. The
modem router uses pins 2 and 3.
Internet LED Is Red
If the Internet LED is red, the device was unable to connect to the Internet. Verify the
following:
Page 123 / 133
Troubleshooting
123
N300 Wireless ADSL2+ Modem Router DGN2200v4
•
Check that your login credentials are correct, or that the information you entered on the
Internet Setup screen is correct.
•
Check if your ISP has a problem—it might not be that the modem router cannot connect
to the Internet, but rather that your ISP that cannot provide an Internet connection.
Obtaining an Internet IP Address
If your modem router is unable to access the Internet, and your Internet LED is green, see if
the modem router can obtain an Internet IP address from the ISP. Unless you have been
assigned a static IP address, your modem router requests an IP address from the ISP. You
can determine whether the request was successful using the browser interface.
To check the Internet IP address from the browser interface:
1.
Launch your browser, and select an external site such as
www.netgear.com
.
2.
Access the main menu of the modem router’s configuration at http://192.168.0.1.
3.
Click the
Advanced
tab and check that an IP address is shown for the WAN port.
If 0.0.0.0 is shown, your modem router has not obtained an IP address from your ISP.
If your modem router is unable to 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
incorrectly set. See the following section,
Troubleshoot PPPoE or PPPoA
.
•
Your ISP might check for your computer’s host name. Assign the computer host name of
your ISP account to the modem router in the browser-based Setup Wizard.
•
Your ISP allows only one Ethernet MAC address to connect to 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
modem router’s MAC address.
-
Configure your modem router to spoof your computer’s MAC address. This can be
done in the Basic Settings screen.
Troubleshoot PPPoE or PPPoA
To debut the PPPoE or PPPoA connection:
1.
Access the main menu of the modem router at http://192.168.0.1.
2.
Select
Maintenance > Router Status
.
3.
Click the
Connection Status
button.
If all of the steps indicate OK, your PPPoE or PPPoA connection is up and working.
If any of the steps indicates Failed, you can attempt to reconnect by clicking
Connect
. The
modem router continues to attempt to connect indefinitely.
If you cannot connect after several minutes, you might be using an incorrect service name,
user name, or password. There also might be a provisioning problem with your ISP.
Page 124 / 133
Troubleshooting
124
N300 Wireless ADSL2+ Modem Router DGN2200v4
Unless you connect manually, the modem router does not authenticate using PPPoE or
PPPoA until data is transmitted to the network.
Troubleshoot Internet Browsing
If your modem router can obtain an IP address, but your computer is unable to load any web
pages from the Internet:
•
Your computer might not recognize any DNS server addresses.
A DNS server is a host on the Internet that translates Internet names (such as www
addresses) to numeric IP
addresses. Typically your ISP provides the addresses of one or
two DNS servers for your use. If you entered a DNS address when you set up the modem
router, reboot your computer, and verify the DNS address. Alternatively, you can
configure your computer manually with DNS addresses, as explained in your operating
system documentation
.
•
Your computer might not have the modem router configured as its TCP/IP modem router.
If your computer obtains its information from the modem router by DHCP, reboot the
computer, and verify the modem router address.
TCP/IP Network Not Responding
Most TCP/IP terminal devices and routers have a ping utility for sending an echo request
packet to the designated device. The device responds with an echo reply to tell whether a
TCP/IP network is responding to requests.
Test the LAN Path to Your Modem Router
You can ping the modem router from your computer to verify that the LAN path to your
modem router is set up correctly.
To ping the modem router from a computer running Windows 95 or later:
1.
From the Windows taskbar, click the
Start
button, and select
Run
.
2.
In the field provided, type
ping
followed by the IP address of the modem router, as in this
example:
3.
Click
OK
.
You should see a message like this one:
Pinging <IP address> with 32 bytes of data
If the path is working, you see this message:
Reply from < IP address >: bytes=32 time=NN ms TTL=xxx
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Troubleshooting
125
N300 Wireless ADSL2+ Modem Router DGN2200v4
If the path is not working, you see this message:
Request timed out
If the path is not functioning correctly, you could have one of the following problems:
•
Wrong physical connections
Make sure that the LAN port LED is lit. If the LED is off, follow the instructions in
LAN
LED Is Off
on page
120.
•
Wrong network configuration
-
Verify that the Ethernet card driver software and TCP/IP software are both
installed and configured on your computer or workstation.
-
Verify that the IP address for your modem router and your workstation are correct
and that the addresses are on the same subnet.
Test the Path from Your Computer to a Remote Device
After you verify that the LAN path works correctly, test the path from your computer to a
remote device. In the Windows Run screen, type:
ping -n 10 IP address
where
IP address
is the IP address of a remote device such as your ISP’s DNS server.
If the path is functioning correctly, replies as described in
Test the LAN Path to Your Modem
Router
on page
124 display. If you do not receive replies:
•
Check that your computer has the IP address of your modem router listed as the default
modem router. If the IP configuration of your computer is assigned by DHCP, this
information is not visible in your computer’s Network Control Panel. Verify that the IP
address of the modem router is listed as the default router.
•
Check that the network address of your computer (the portion of the IP address specified
by the netmask) is different from the network address of the remote device.
•
Check that your cable or DSL modem is connected and functioning.
•
If your ISP assigned a host name to your computer, enter that host name as the account
name in the Internet Setup screen.
•
Your ISP could be rejecting the Ethernet MAC addresses of all but one of your
computers. Many broadband ISPs restrict access by allowing traffic only from the MAC
address of your modem, but some additionally restrict access to the MAC address of a
single computer connected to that modem. In this case, configure your modem router to
clone or spoof the MAC address from the authorized computer.
Changes Not Saved
If the modem router does not save the changes you make in the modem router interface,
check the following:

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