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

.

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

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.

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

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:

ping 192.168.0.1

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.