D-Link DIR-685 Router Manual PDF (Setup & Configuration Guide)

Page 141 / 149 Scroll up to view Page 136 - 140

136

D-Link DIR-685 User Manual

Section 8 - Troubleshooting

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

If you are having a problem sending or receiving e-mail, 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

Page 142 / 149

137

D-Link DIR-685 User Manual

Section 8 - 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 e-mail. If changing the MTU does not resolve the problem, continue changing the MTU in

increments of ten.

4. What can I do if the DIR-685 locks up or stops responding?

If the LCD touchpad panel ever becomes unresponsive, or if the router itself is malfunctioning, you may need to reset

the device. The DIR-685 can be reset by unplugging the power adapter from the wall for a few seconds. Plug it back

in and wait a few moments for the router to restart.

Note:

There is no on/off button on the router. The reset button on the back of the router is used to restore the router

settings to factory defaults.

Page 143 / 149

138

D-Link DIR-685 User Manual

Appendix B - Networking Basics

Networking Basics

Check your IP address

After you install your new D-Link adapter, by default, the TCP/IP settings should be set to obtain an IP address from

a DHCP server (i.e. wireless router) automatically. To verify your IP address, please follow the steps below.

Click on

Start

>

Run

. In the run box type

cmd

and click

OK.

(Windows Vista

®

users type

cmd

in the

Start Search

box.)

At the prompt, type

ipconﬁg

and press

Enter

.

This will display the IP address, subnet mask, and

the default gateway of your adapter.

If the address is 0.0.0.0, check your adapter

installation, security settings, and the settings

on your router. Some ﬁrewall software programs

may block a DHCP request on newly installed

adapters.

If you are connecting to a wireless network at a hotspot (e.g. hotel, coffee shop, airport), please contact an employee

or administrator to verify their wireless network settings.

Page 144 / 149

139

D-Link DIR-685 User Manual

Appendix B - Networking Basics

Statically Assign an IP address

If you are not using a DHCP capable gateway/router, or you need to assign a static IP address, please follow the steps

below:

Step 1

Windows Vista

®

-

Click on

Start

>

Control Panel

>

Network and Internet

>

Network and Sharing Center

>

Manage

Network Connections.

Windows

®

XP -

Click on

Start

>

Control Panel

>

Network Connections

.

Windows

®

2000 -

From the desktop, right-click

My Network Places

>

Properties

.

Step 2

Right-click on the

Local Area Connection

which represents your D-Link network adapter and select

Properties

.

Step 3

Highlight

Internet Protocol (TCP/IP)

and click

Properties

.

Step 4

Click

Use the following IP address

and enter an IP address that is on the same

subnet as your network or the LAN IP address on your router.

Example:

If the router´s LAN IP address is 192.168.0.1, make your IP address

192.168.0.X where X is a number between 2 and 99. Make sure that the number

you choose is not in use on the network. Set Default Gateway the same as the LAN

IP address of your router (192.168.0.1).

Set Primary DNS the same as the LAN IP address of your router (192.168.0.1). The

Secondary DNS is not needed or you may enter a DNS server from your ISP.

Step 5

Click

OK

twice to save your settings.

Page 145 / 149

140

D-Link DIR-685 User Manual

Appendix C - Glossary

802.11a

- An IEEE wireless LAN speciﬁcation standard that operates on the 5GHz frequency band.*

802.11b

- An IEEE wireless LAN speciﬁcation standard that operates on the 2.4GHz frequency band and is interoperable

with 802.11b standard devices.

802.11g

- An IEEE wireless LAN speciﬁcation standard that operates on the 2.4GHz frequency band and is interoperable

with 802.11g standard devices.

802.11n

- An IEEE wireless LAN speciﬁcation standard that operates on the 2.4GHz and 5GHz frequency bands and

is interoperable with 802.11n standard devices.*

Access Point

- A device that creates wireless signal to allow users to connect wirelessly in a wired network.

Bridge

- Connects any wired Ethernet device to a wireless network.

Broadband

- Fast Internet connections typically at home such as DSL, and Cable that allow high bandwidth capability

are considered broadband connection.

Bluetooth

- A low power short-range wireless network used to connect between desktops and laptop computers, PDAs,

digital cameras, scanners, cell phones, and printers. Bluetooth wireless signal can transmit up to 30 feet.

Cable Modem

- A device that works over coaxial line (TV), providing high bandwidth transfer rate, to access the

Internet.

Cardbus Network Adapter

- A device that connects a laptop to the network.

Glossary

* The DIR-685 supports 2.4GHz only

Rate

Popular D-Link Models

Famous Router IPs

Famous Router Companies

Bookmark Our Site

Share