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D-Link DIR-615 User Manual

Section 6 - Troubleshooting

Troubleshooting

This chapter provides solutions to problems that can occur during the installation and operation of the DIR-615.

Read

the following descriptions if you are having problems.

(The examples below are illustrated in Windows

®

XP.

If you have

a different operating system, the screenshots on your computer will look similar to the following examples.)

1. Why can’t I access the web-based configuration utility?

When entering the IP address of the D-Link router (192.168.0.1 for example), you are not connecting to a website on

the Internet or have to be connected to the Internet. The device has the utility built-in to a ROM chip in the device itself.

Your computer must be on the same IP subnet to connect to the web-based utility.

• Make sure you have an updated Java-enabled web browser. We recommend the following:

• Internet Explorer 6.0 or higher

• Firefox 1.5 or higher

• Netscape 8 or higher

• Mozilla 1.7.12 (5.0) or higher

• Opera 8.5 or higher

• Safari 1.2 or higher (with Java 1.3.1 or higher)

• Camino 0.8.4 or higher

• Verify physical connectivity by checking for solid link lights on the device. If you do not get a solid link light, try using

a different cable or connect to a different port on the device if possible. If the computer is turned off, the link light may

not be on.

• Disable any Internet security software running on the computer. Software firewalls such as Zone Alarm, Black Ice,

Sygate, Norton Personal Firewall, and Windows

®

XP firewall may block access to the configuration pages. Check the

help files included with your firewall software for more information on disabling or configuring it.

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D-Link DIR-615 User Manual

Section 6 - Troubleshooting

• Configure your Internet settings:

• Go to

Start

>

Settings

>

Control Panel

. Double-click the

Internet Options

Icon. From the

Security

tab,

click the button to restore the settings to their defaults.

• Click the

Connection

tab and set the dial-up option to

Never Dial a Connection

. Click the LAN Settings

button. Make sure nothing is checked. Click

OK

.

• Go to the

Advanced

tab and click the button to restore these settings to their defaults. Click

OK

three

times.

• Close your web browser (if open) and open it.

• Access the web management. Open your web browser and enter the IP address of your D-Link router in the address

bar. This should open the login page for your the web management.

• If you still cannot access the configuration, unplug the power to the router for 10 seconds and plug back in. Wait

about 30 seconds and try accessing the configuration. If you have multiple computers, try connecting using a different

computer.

2. What can I do if I forgot my password?

If you forgot your password, you must reset your router. Unfortunately this process will change all your settings back

to the factory defaults.

To reset the router, locate the reset button (hole) on the rear panel of the unit. With the router powered on, use a

paperclip to hold the button down for 10 seconds. Release the button and the router will go through its reboot process.

Wait about 30 seconds to access the router. The default IP address is 192.168.0.1. When logging in, the username is

admin

and leave the password box empty.

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D-Link DIR-615 User Manual

Section 6 - Troubleshooting

3. Why can’t I connect to certain sites or send and receive emails when connecting through my router?

If you are having a problem sending or receiving email, or connecting to secure sites such as eBay, banking sites, and

Hotmail, we suggest lowering the MTU in increments of ten (Ex. 1492, 1482, 1472, etc).

Note: AOL DSL+ users must use MTU of 1400.

To find the proper MTU Size, you’ll have to do a special ping of the destination you’re trying to go to. A destination could

be another computer, or a URL.

• Click on

Start

and then click

Run

.

• Windows

®

95, 98, and Me users type in

command

(Windows

®

NT, 2000, and XP users type in

cmd

) and

press

Enter

(or click

OK

).

• Once the window opens, you’ll need to do a special ping. Use the following syntax:

ping [url] [-f] [-l] [MTU value]

Example:

ping yahoo.com -f -l 1472

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D-Link DIR-615 User Manual

Section 6 - Troubleshooting

You should start at 1472 and work your way down by 10 each time. Once you get a reply, go up by 2 until you get a

fragmented packet. Take that value and add 28 to the value to account for the various TCP/IP headers. For example,

lets say that 1452 was the proper value, the actual MTU size would be 1480, which is the optimum for the network

we’re working with (1452+28=1480).

Once you find your MTU, you can now configure your router with the proper MTU size.

To change the MTU rate on your router follow the steps below:

• Open your browser, enter the IP address of your router (192.168.0.1) and click

OK

.

• Enter your username (admin) and password (blank by default). Click

OK

to enter the web configuration

page for the device.

• Click on

Setup

and then click

Manual Configure

.

• To change the MTU enter the number in the MTU field and click

Save Settings

to save your settings.

• Test your email. If changing the MTU does not resolve the problem, continue changing the MTU in

increments of ten.

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D-Link DIR-615 User Manual

Appendix A - Wireless Basics

D-Link wireless products are based on industry standards to provide easy-to-use and compatible high-speed wireless

connectivity within your home, business or public access wireless networks. Strictly adhering to the IEEE standard,

the D-Link wireless family of products will allow you to securely access the data you want, when and where you want

it. You will be able to enjoy the freedom that wireless networking delivers.

A wireless local area network (WLAN) is a cellular computer network that transmits and receives data with radio signals

instead of wires. Wireless LANs are used increasingly in both home and office environments, and public areas such

as airports, coffee shops and universities. Innovative ways to utilize WLAN technology are helping people to work and

communicate more efficiently. Increased mobility and the absence of cabling and other fixed infrastructure have proven

to be beneficial for many users.

Wireless users can use the same applications they use on a wired network.

Wireless adapter cards used on laptop

and desktop systems support the same protocols as Ethernet adapter cards.

Under many circumstances, it may be desirable for mobile network devices to link to a conventional Ethernet LAN in

order to use servers, printers or an Internet connection supplied through the wired LAN.

A Wireless Router is a device

used to provide this link.

Wireless Basics