Zyxel P-660HN-F1Z Router Manual PDF (Setup & Configuration Guide)

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P-660HN-FxZ Series User’s Guide

313

C

HAPTER

24

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

•

ZyXEL Device Access and Login

•

Internet Access

24.1

Power, Hardware Connections, and LEDs

V

The ZyXEL Device does not turn on. None of the LEDs turn on.

1

Make sure the ZyXEL Device is turned on.

2

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

3

Make sure the power adaptor or cord is connected to the ZyXEL Device and plugged in

to an appropriate power source. Make sure the power source is turned on.

4

Turn the ZyXEL Device off and on.

5

If the problem continues, contact the vendor.

V

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 35

.

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

Turn the ZyXEL Device off and on.

5

If the problem continues, contact the vendor.

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Chapter 24 Troubleshooting

P-660HN-FxZ Series User’s Guide

314

24.2

ZyXEL Device Access and Login

V

I forgot the IP address for the ZyXEL Device.

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

ZyXEL Device 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 ZyXEL

Device (it depends on the network), so enter this IP address in your Internet browser.

3

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

Section 1.6

on page 36

.

V

I forgot the password.

1

The default admin password is

1234

, and the default user password is

user

.

2

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

Section 1.6

on page 36

.

V

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 6.2 on page 90

), use the new IP address.

•

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

suggestions for

I forgot the IP address for the ZyXEL Device.

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 341

.

4

If you disabled

Any IP

(

Section 6.6.7 on page 102

), make sure your computer is in the

same subnet as the ZyXEL Device. (If you know that there are routers between your

computer and the ZyXEL Device, skip this step.)

•

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

dynamic IP address. See

Appendix A on page 319

. Your ZyXEL Device is a DHCP

server by default.

•

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

in the same subnet as the ZyXEL Device. See

Appendix A on page 319

.

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Chapter 24 Troubleshooting

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315

5

Reset the device to its factory defaults, and try to access the ZyXEL Device with the

default IP address. See

Section 1.6 on page 36

.

6

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

advanced suggestions.

Advanced Suggestions

•

Try to access the ZyXEL Device using another service, such as Telnet. If you can access

the ZyXEL Device, check the remote management settings and firewall rules to find out

why the ZyXEL Device does not respond to HTTP.

•

If your computer is connected to the

WAN

port or is connected wirelessly, use a computer

that is connected to a

ETHERNET

port.

V

I can see the

Login

screen, but I cannot log in to the ZyXEL Device.

1

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

1234

, and the default user password is

user

. The field is case-sensitive, so make sure

[Caps Lock] is not on.

2

You cannot log in to the web configurator while someone is using Telnet to access the

ZyXEL Device. Log out of the ZyXEL Device in the other session, or ask the person

who is logged in to log out.

3

Turn the ZyXEL Device off and on.

4

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

Section

24.1 on page 313

.

V

I cannot Telnet to the ZyXEL Device.

See the troubleshooting suggestions for

I cannot see or access the Login screen in the web

configurator.

Ignore the suggestions about your browser.

V

I cannot use FTP to upload / download the configuration file. / I cannot use

FTP to upload new firmware.

See the troubleshooting suggestions for

I cannot see or access the Login screen in the web

configurator.

Ignore the suggestions about your browser.

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Chapter 24 Troubleshooting

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316

24.3

Internet Access

V

I cannot access the Internet.

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 35

.

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

If the problem continues, contact your ISP.

V

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

ZyXEL Device), 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 35

.

2

Turn the ZyXEL Device off and on.

3

If the problem continues, contact your ISP.

V

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 35

. If the ZyXEL Device 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 your computer closer

to the ZyXEL Device 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

Turn the ZyXEL Device off and on.

4

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

advanced suggestions.

Advanced Suggestions

•

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

enabled, you might consider raising or lowering the priority for some applications.

Page 320 / 421

317

P

ART

VIII

Appendices and

Index

"

The appendices provide general information. Some details may not apply to

your ZyXEL Device.

Setting up Your Computer’s IP Address

(319)

Pop-up Windows, JavaScripts and Java Permissions

(341)

IP Addresses and Subnetting

(349)

Wireless LANs

(357)

Services

(371)

Internal SPTGEN

(375)

Legal Information

(399)

Customer Support

(403)

Index

(409)

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