Zyxel NBG-416N Router Manual PDF (Setup & Configuration Guide)

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Chapter 20 Troubleshooting

NBG-416N User’s Guide

146

3

Inspect your cables for damage. Contact the vendor to replace any damaged

cables.

4

Disconnect and re-connect the power adaptor to the NBG-416N.

5

If the problem continues, contact the vendor.

20.2

NBG-416N Access and Login

I don’t know the IP address of my NBG-416N.

1

The default IP address is

192.168.1.1

.

2

If you changed the IP address and have forgotten it, you might get the IP address

of the NBG-416N by looking up the IP address of the default gateway for your

computer. To do this in most Windows computers, click

Start > Run

, enter

cmd

,

and then enter

ipconfig

. The IP address of the

Default Gateway

might be the IP

address of the NBG-416N (it depends on the network), so enter this IP address in

your Internet browser.Set your device to

Router Mode

, login (see the Quick Start

Guide for instructions) and go to the

Device Information

table in the

Status

screen. Your NBG-416N’s IP address is available in the

Device Information

table.

•

If the

DHCP

setting under

LAN information

is

None

, your device has a fixed

IP address.

• If the

DHCP

setting under

LAN information

is

Client

, then your device

receives an IP address from a DHCP server on the network.

3

If your NBG-416N is a DHCP client, you can find your IP address from the DHCP

server. This information is only available from the DHCP server which allocates IP

addresses on your network. Find this information directly from the DHCP server or

contact your system administrator for more information.

4

Reset your NBG-416N to change all settings back to their default. This means your

current settings are lost. See

Section 20.4 on page 149

in the

Troubleshooting

for information on resetting your NBG-416N.

I forgot the username and password.

1

The default username is

admin

and default password is

1234

.

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Chapter 20 Troubleshooting

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2

If this does not work, you have to reset the device to its factory defaults. See

Section 20.4 on page 149

.

I cannot see or access the

Login

screen in the Web Configurator.

1

Make sure you are using the correct IP address.

• The default IP address is

192.168.1.1

.

• If you changed the IP address (

Section 7.3 on page 102

), use the new IP

address.

• If you changed the IP address and have forgotten it, see the troubleshooting

suggestions for

I don’t know the IP address of my NBG-416N.

2

Check the hardware connections, and make sure the LEDs are behaving as

expected. See the Quick Start Guide.

3

Make sure your Internet browser does not block pop-up windows and has

JavaScript and Java enabled. See

Appendix B on page 167

.

4

Make sure your computer is in the same subnet as the NBG-416N. (If you know

that there are routers between your computer and the NBG-416N, skip this step.)

• If there is a DHCP server on your network, make sure your computer is using

a dynamic IP address. See

Section 7.3 on page 102

.

• If there is no DHCP server on your network, make sure your computer’s IP

address is in the same subnet as the NBG-416N. See

Section 7.3 on page

102

.

5

Reset the device to its factory defaults, and try to access the NBG-416N with the

default IP address. See

Section 7.3 on page 102

.

6

If the problem continues, contact the network administrator or vendor, or try one

of the advanced suggestions.

Advanced Suggestions

•

If your computer is connected to the

WAN

port or is connected wirelessly, use a

computer that is connected to a

LAN

/

ETHERNET

port.

I can see the

Login

screen, but I cannot log in to the NBG-416N.

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Chapter 20 Troubleshooting

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1

Make sure you have entered the password correctly. The default username is

admin

and default password is

1234

. This field is case-sensitive, so make sure

[Caps Lock] is not on.

2

This can happen when you fail to log out properly from your last session. Try

logging in again after 5 minutes.

3

Disconnect and re-connect the power adaptor or cord to the NBG-416N.

4

If this does not work, you have to reset the device to its factory defaults. See

Section 20.4 on page 149

.

20.3

Internet Access

I cannot access the Internet.

1

Check the hardware connections, and make sure the LEDs are behaving as

expected. See the Quick Start Guide.

2

Make sure you entered your ISP account information correctly in the wizard. These

fields are case-sensitive, so make sure [Caps Lock] is not on.

3

If you are trying to access the Internet wirelessly, make sure the wireless settings

in the wireless client are the same as the settings in the AP.

4

Disconnect all the cables from your device, and follow the directions in the Quick

Start Guide again.

5

Go to

Maintenance > Sys OP Mode > General

. Check your

System Operation

Mode

setting.

• Select

Router

if your device routes traffic between a local network and

another network such as the Internet.

• Select

Access Point

if your device bridges traffic between clients on the

same network.

6

If the problem continues, contact your ISP.

I cannot access the Internet anymore. I had access to the Internet (with the NBG-

416N), but my Internet connection is not available anymore.

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Chapter 20 Troubleshooting

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149

1

Check the hardware connections, and make sure the LEDs are behaving as

expected. See the Quick Start Guide and

Section 1.5 on page 20

.

2

Reboot the NBG-416N.

3

If the problem continues, contact your ISP.

The Internet connection is slow or intermittent.

1

There might be a lot of traffic on the network. Look at the LEDs, and check

Section

1.5 on page 20

. If the NBG-416N is sending or receiving a lot of information, try

closing some programs that use the Internet, especially peer-to-peer applications.

2

Check the signal strength. If the signal strength is low, try moving the NBG-416N

closer to the AP if possible, and look around to see if there are any devices that

might be interfering with the wireless network (for example, microwaves, other

wireless networks, and so on).

3

Reboot the NBG-416N.

4

If the problem continues, contact the network administrator or vendor, or try one

of the advanced suggestions.

Advanced Suggestion

•

Check the settings for QoS. If it is disabled, you might consider activating it.

20.4

Resetting the NBG-416N to Its Factory

Defaults

If you reset the NBG-416N, you lose all of the changes you have made. The NBG-

416N re-loads its default settings, and the username/password resets to

admin/

1234

. You have to make all of your changes again.

You will lose all of your changes when you push the

RESET

button.

To reset the NBG-416N,

1

Make sure the power LED is on.

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Chapter 20 Troubleshooting

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150

2

Press the

RESET

button for longer than 1 second to restart/reboot the NBG-416N.

3

Press the

RESET

button for longer than five seconds to set the NBG-416N back to

its factory-default configurations.

If the NBG-416N restarts automatically, wait for the NBG-416N to finish

restarting, and log in to the Web Configurator. The username is

admin

and

password is

1234

.

If the NBG-416N does not restart automatically,

di

sconnect and reconnect the

NBG-416N’s power. Then, follow the directions above again.

20.5

Wireless Router/AP Troubleshooting

I cannot access the NBG-416N or ping any computer from the WLAN (wireless

AP or router).

1

Make sure the wireless LAN is enabled on the NBG-416N.

2

Make sure the wireless adapter on the wireless station is working properly.

3

Make sure the wireless adapter installed on your computer is IEEE 802.11

compatible and supports the same wireless standard as the NBG-416N.

4

Make sure your computer (with a wireless adapter installed) is within the

transmission range of the NBG-416N.

5

Check that both the NBG-416N and your wireless station are using the same

wireless and wireless security settings.

6

Make sure traffic between the WLAN and the LAN is not blocked by the firewall on

the NBG-416N.

7

Make sure you allow the NBG-416N to be remotely accessed through the WLAN

interface. Check your remote management settings.

•

See

Chapter 7 Wireless LAN

for more information.

I can access the Web Configurator after I switched to AP mode.

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