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Page 41 / 53 Scroll up to view Page 36 - 40
Advanced Settings
41
NETGEAR DOCSIS 3.0 N900 Wireless Data Gateway
To enable NTP:
1.
In the main menu, under Advanced, select
NTP
.
2.
Select the
NTP enable
box.
3.
Enter the IP server addresses.
a.
Enter the first server IP address in the Server IP Address 1 field.
b.
Enter the second server IP address in the Server IP Address 2 field.
c.
Enter the third server IP address in the
Server IP Address 3 field.
4.
Click
Apply
.
Page 42 / 53
42
5
5.
T
roubleshooting
This chapter gives information about troubleshooting your NETGEAR DOCSIS 3.0 N900
Wireless Data Gateway. For the common problems listed, see the section indicated.
•
Have I connected the gateway correctly?
See
“Basic Functions”
on page
43.
•
I cannot access the gateway configuration with my browser.
See
“Connect to the Gateway’s Main Menu”
on page
43.
•
I have configured the gateway but I cannot access the Internet.
See
“Troubleshoot the ISP Connection”
on page
44.
•
I cannot access the gateway.
See
Troubleshoot a TCP/IP Network Using a Ping Utility
on page
44
If you cannot remember the gateway’s configuration password or you want to clear the
configuration and start over again, see
Factory Default Settings
on page
48.
Tip:
NETGEAR provides helpful articles, documentation, and the latest
software updates at
Page 43 / 53
Troubleshooting
43
NETGEAR DOCSIS 3.0 N900 Wireless Data Gateway
Basic Functions
After you have turned on power to the gateway, do the following:
1.
Check to see that the Power LED is lit.
2.
Check that the numbered Ethernet LEDs light momentarily.
3.
After a few seconds, check that the LEDs are lit for any local ports that are connected.
The following table provides help when you are using the LEDs for troubleshooting.
Connect to the Gateway’
s Main Menu
If you are unable to access the gateway’s main menu from a computer on your local network,
check the following:
•
Check the Ethernet connection between the computer and the gateway as described in
the previous section.
LED Behavior
Action
All LEDs are off when the gateway
is plugged in.
•
Make sure that the power cord is properly connected to your
gateway and that the power supply adapter is properly connected
to a functioning power outlet.
•
Check that you are using the 12V-DC power adapter supplied by
NETGEAR for this product.
If the error persists, you have a hardware problem and should contact
technical support.
All LEDs stay on.
Clear the gateway’s configuration to factory defaults to set the
gateway’s IP address to 192.168.0.1. See
Factory Default Settings
on
page
48.
If the error persists, you might have a hardware problem and should
contact technical support.
LAN LED is off for a port with an
Ethernet connection.
•
Make sure that the Ethernet cable connections are secure at the
gateway and at the hub or computer.
•
Make sure that power is turned on to the connected hub or
computer.
•
Be sure that you are using the correct cable.
Internet LED is off and the
gateway is connected to the cable
television cable.
•
Make sure that the coaxial cable connections are secure at the
gateway and at the wall jack.
•
Make sure that your cable service provider has provisioned your
Internet service. Your provider should verify that the signal quality
is good enough for cable modem service.
•
Remove any excessive splitters you might have on your cable line.
It might be necessary to run a “home run” back to the point where
the cable enters your home.
Page 44 / 53
Troubleshooting
44
NETGEAR DOCSIS 3.0 N900 Wireless Data Gateway
•
Make sure that your computer’s IP address is on the same subnet as the gateway. If you
are using the recommended addressing scheme, your computer’s address should be in
the range of 192.168.0.10 to 192.168.0.254.
Note:
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
auto-generated 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 gateway and reboot your computer.
•
If your gateway’s IP address has been changed and you do not know the current IP
address, clear the gateway’s configuration to factory defaults. This action sets the
gateway’s IP address to 192.168.0.1. For more information, see
Factory Default Settings
on page
48
.
•
Make sure that your browser has Java, JavaScript, or ActiveX enabled. If you are using
Internet Explorer, click
Refresh
to make 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 gateway user name
admin
is lowercase (
Caps Lock
should be off). The default password is
password
.
If the gateway does not save changes you have made, check the following:
•
When entering configuration settings, be sure to click the
Apply
button before moving to
another screen, or your changes are lost.
•
Click the
Refresh
or
Reload
button in the web browser. The changes might have
occurred, but the web browser might be caching the old configuration.
T
roubleshoot the ISP Connection
If your gateway is unable to access the Internet and your Internet LED is on, you might need
to register the cable MAC address or device MAC address of your gateway with your cable
service provider.
Additionally, your computer might not have the gateway configured as its TCP/IP gateway. If
your computer obtains its information from the gateway by DHCP, reboot the computer and
verify the gateway address. For more information, see
Reserve an IP Address for DHCP Use
on page
37.
T
roubleshoot a TCP/IP Network Using a Ping Utility
Most TCP/IP terminal devices and routers contain a ping utility that sends an echo request
packet to the designated device. The device then responds with an echo reply. You can
Page 45 / 53
Troubleshooting
45
NETGEAR DOCSIS 3.0 N900 Wireless Data Gateway
easily troubleshoot a TCP/IP network by using the ping utility in your computer or
workstation.
T
est the LAN Path to
Y
our Gateway
You can use ping to verify that the LAN path to your gateway is set up correctly.
To ping the gateway from a computer running Windows 95 or later:
1.
From the Windows toolbar, click the
Start
button and select
Run
.
2.
In the field provided, type
ping
followed by the IP address of the gateway, 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 working 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, see
Basic Functions
on
page
43.
-
Check that the corresponding LEDs are on for your network interface card and for
the hub ports (if any) that are connected to your workstation and gateway.
•
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 gateway and your workstation are correct and
that the addresses are on the same subnet.
T
est the Path from
Y
our Computer to a Remote Device
After verifying that the LAN path works correctly, test the path from your computer to a
remote device. From the Windows run menu, type:
ping -n 10
<IP address>
where <
IP address
> is the IP address of a remote device such as your ISP’s DNS server.

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