Zyxel NBG6515 Router Manual PDF (Setup & Configuration Guide)

Page 166 / 249 Scroll up to view Page 161 - 165

Chapter 25 Maintenance

NBG6515 User’s Guide

166

25.8

Restart Screen

System restart allows you to reboot the NBG without turning the power off.

Click

Maintenance > Restart

to open the following screen.

Figure 129

Maintenance > Restart

Click

Restart

to have the NBG reboot. This does not affect the NBG's configuration.

Page 167 / 249

NBG6515 User’s Guide

167

C

HAPTER

26

Troubleshooting

This chapter offers some suggestions to solve problems you might encounter. The potential

problems are divided into the following categories.

•

Power, Hardware Connections, and LEDs

•

NBG Access and Login

•

Internet Access

•

Resetting the NBG to Its Factory Defaults

•

Wireless Router/AP Troubleshooting

•

USB Device Problems

26.1

Power, Hardware Connections, and LEDs

The NBG does not turn on. None of the LEDs turn on.

1

Make sure you are using the power adaptor or cord included with the NBG.

2

Make sure the power adaptor or cord is connected to the NBG and plugged in to an appropriate

power source. Make sure the power source is turned on.

3

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

4

If the problem continues, contact the vendor.

One of the LEDs does not behave as expected.

1

Make sure you understand the normal behavior of the LED. See

Section 1.5 on page 14

.

2

Check the hardware connections. See the Quick Start Guide.

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.

5

If the problem continues, contact the vendor.

Page 168 / 249

Chapter 26 Troubleshooting

NBG6515 User’s Guide

168

26.2

NBG Access and Login

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

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 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 (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’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 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 to change all settings back to their default. This means your current settings are

lost. See

Section 26.4 on page 171

in the

Troubleshooting

for information on resetting your NBG.

I forgot the password.

1

The default password is

1234

.

2

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

Section 26.4 on page

171

.

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 14.4 on page 112

), 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.

2

Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick

Start Guide.

Page 169 / 249

Chapter 26 Troubleshooting

NBG6515 User’s Guide

169

3

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

enabled. See

Appendix A on page 173

.

4

Make sure your computer is in the same subnet as the NBG. (If you know that there are routers

between your computer and the NBG, skip this step.)

•

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

address. See

Appendix B on page 184

.

•

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

same subnet as the NBG. See

Appendix B on page 184

.

5

Reset the device to its factory defaults, and try to access the NBG with the default IP address. See

Section 3.3 on page 30

.

6

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

suggestions.

Advanced Suggestion

•

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.

1

Make sure you have entered the password correctly. The 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.

4

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

Section 26.4 on page

171

.

26.3

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.

Page 170 / 249

Chapter 26 Troubleshooting

NBG6515 User’s Guide

170

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

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.

• Select

Universal Repeater Mode

if your device is wirelessly connected to an access point or

wireless router with Internet access. Your computer should be set to obtain an dynamic IP

address.

6

Disconnect all the cables from your device, and follow the directions in the Quick Start Guide again.

7

If the problem continues, contact your ISP.

I cannot access the Internet anymore. I had access to the Internet (with the NBG), but my

Internet connection is not available anymore.

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 14

.

2

Reboot the NBG.

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 14

.

If the NBG 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 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.

4

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

suggestions.

Advanced Suggestions

•

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

If it is enabled, you might consider changing the allocations.

Rate

Popular Zyxel Models

Famous Router IPs

Famous Router Companies

Bookmark Our Site

Share