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Page 151 / 185 Scroll up to view Page 146 - 150
Troubleshooting
151
N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700
Test the LAN Path to Your Wireless Modem Router
You can ping the router from your computer to verify that the LAN path to your router is set up
correctly.
To ping the router from a PC running Windows 95 or later:
1.
From the Windows task bar, click the
Start
button, and select
Run
.
2.
In the field provided, type
ping
followed by the IP address of the 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
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 on. If the LED is off, follow the instructions in
LAN LED Is Off
on page 147.
-
Check that the corresponding link LEDs are on for your network interface card
and for the hub ports (if any) that are connected to your workstation and router.
•
Wrong network configuration
-
Verify that the Ethernet card driver software and TCP/IP software are both
installed and configured on your PC or workstation.
-
Verify that the IP address for your router and your workstation are correct and that
the addresses are on the same subnet.
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Troubleshooting
152
N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700
Test the Path from Your Computer to a Remote Device
After you verify that the LAN path works correctly, test the path from your PC 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 Wireless
Modem Router
on page 151 display. If you do not receive replies:
•
Check that your PC has the IP address of your router listed as the default wireless
modem router. If the IP configuration of your PC is assigned by DHCP, this information is
not visible in your PC’s Network Control Panel. Verify that the IP address of the router is
listed as the default wireless modem router.
•
Check that the network address of your PC (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 ADSL modem is connected and functioning.
•
If your ISP assigned a host name to your PC, enter that host name as the account name
in the Basic Settings screen.
•
Your ISP could be rejecting the Ethernet MAC addresses of all but one of your PCs. 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 PC
connected to that modem. In this case, configure your router to clone or spoof the MAC
address from the authorized PC.
Cannot Log In
If you cannot log in to the wireless modem router from a computer on your local network,
check the following:
•
The router is plugged in and it is on.
•
You are using the correct login information. The login name is
admin
, and the password
is
password
. Make sure that Caps Lock is off when you enter this information.
•
If you cannot connect wirelessly, try an Ethernet connection and view the router wireless
settings and set up your wireless computer with corresponding wireless settings.
•
If you are using an Ethernet-connected computer, check the Ethernet connection
between the computer and the router. The LAN LED for the port you are using on the
router should light up to show your connection.
•
Your computer’s IP address is on the same subnet as the router. If you are using the
recommended addressing scheme, your computer’s address should be in the range
192.168.0.2 to 192.168.0.254.
•
If the computer IP address is 169.254.x.x, recent versions of Windows and Mac OS
generate and assign an IP address when the computer cannot reach a DHCP server. The
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Troubleshooting
153
N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700
autogenerated addresses are in the range 169.254.x.x. If your IP address is in this range,
check the connection from the computer to the router and reboot your computer.
•
If your router’s IP address was changed and you do not know the current IP address,
clear the router’s configuration to factory defaults as explained in
Factory Settings
on
page 156. This sets the router’s IP address to 192.168.0.1.
•
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 closing the browser and relaunching it.
Changes Not Saved
If the router does not save the changes you make in the router interface, check the following:
•
When entering configuration settings, always click the
Apply
button before moving to
another screen or tab, or your changes are lost.
•
Click the
Refresh
or
Reload
button in the web browser. The changes might have
occurred, but the old settings might be in the web browser’s cache.
Firmware Needs to Be Reloaded
When you attempt to connect to the Internet, the browser might display a message similar to
the following one telling you that you need to reload the router’s firmware. This means a
problem has been detected with the router’s firmware.
Figure 61. Reload firmware
To reload the firmware:
1.
If you already have the firmware file on your PC, go directly to step 2. If you do not have
the firmware file on your PC, obtain the firmware from the NETGEAR support site at
through another working Internet connection.
2.
Click
Browse
.
3.
Navigate to the firmware file.
4.
Click
Upgrade
. A progress bar displays. The reload takes about 5 minutes to complete.
When the firmware recovery is complete, the login screen displays so you can log in.
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Troubleshooting
154
N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700
Incorrect Date or Time
Select
Security > Schedule
to display the current date and time. The wireless modem router
uses the Network Time Protocol (NTP) to obtain the current time from one of several network
time servers on the Internet. Each entry in the log is stamped with the date and time of day.
Problems with the date and time function can include the following:
•
Date shown is January 1, 2000. This means the router has not yet successfully reached a
network time server. Check that your Internet access is configured correctly. If you have
just completed configuring the router, wait at least 5 minutes, and check the date and time
again.
•
Time is off by one hour. The router does not automatically sense daylight savings time. In
the Schedule screen, select the
Adjust for Daylight Savings Time
check box.
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Page 155 / 185
155
A
A.
Supplemental Information
This appendix includes the factory default settings and technical specifications for the
N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700, and
instructions for wall-mounting the unit.
This appendix contains the following sections:
•
Factory Settings
•
Technical Specifications
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