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Troubleshooting

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Troubleshooting the ISP Connection

If your gateway is unable to access the Internet and your Cable Link LED is on, you may need to

register the Cable MAC Address and/or Device MAC Address of you gateway with your cable

service provider.

Additionally, your PC may not have the gateway configured as its TCP/IP gateway. If your PC

obtains its information from the gateway by DHCP, reboot the PC and verify the gateway address.

See the link to the online document

“ITCP/IP Networking Basics” in Appendix B

.

Troubleshooting a TCP/IP Network Using a Ping Utility

Most TCP/IP terminal devices and routers contain a ping utility that sends an echo request packet

to the designated device. The device then responds with an echo reply. Troubleshooting a TCP/IP

network is made easier by using the ping utility in your PC or workstation.

Testing the LAN Path to Your Gateway

You can use ping to verify that the LAN path to your gateway is set up correctly.

To ping the gateway from a PC running Windows 95 or later:

1.

From the Windows toolbar, click on the Start button and select Run.

2.

In the field provided, type Ping followed by the IP address of the gateway, as in this example:

ping 192.168.0.1

3.

Click OK.

You should see a message like this one:

Pinging <IP address> with 32 bytes of data

If the path is working, you see this message:

Reply from < IP address >: bytes=32 time=NN ms TTL=xxx

If the path is not working, you see this message:

Request timed out

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Troubleshooting

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If the path is not working correctly, you could have one of the following problems:

•

Wrong physical connections.

–

Make sure the LAN port LED is on. If the LED is off, see

“Using LEDs to

Troubleshoot” on page 6-2

.

–

Check that the corresponding Link LEDs are on for your network interface card and

for the hub ports (if any) that are connected to your workstation and gateway.

•

Wrong network configuration.

–

Verify that the Ethernet card driver software and TCP/IP software are both installed

and configured on your PC or workstation.

–

Verify that the IP address for your gateway and your workstation are correct and that

the addresses are on the same subnet.

Testing the Path from Your PC to a Remote Device

After verifying that the LAN path works correctly, test the path from your PC to a remote device.

From the Windows run menu, type:

PING -n 10

<IP address>

where <

IP address

> is the IP address of a remote device such as your ISP’s DNS server.

If the path is functioning correctly, replies as in the previous section are displayed. If you do not

receive replies:

•

Check that your PC has the IP address of your gateway listed as the default gateway. If the IP

configuration of your PC is assigned by DHCP, this information will not be visible in your

PC’s Network Control Panel. Verify that the IP address of the gateway is listed as the default

gateway. See the link to the online document

“ITCP/IP Networking Basics” in Appendix B

.

•

Check to see that the network address of your PC (the portion of the IP address specified by

the netmask) is different from the network address of the remote device.

•

Check that your Cable Link LED is on.

•

If your ISP assigned a host name to your PC, enter that host name as the Account Name in the

Basic Settings screen.

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Troubleshooting

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Default Settings and Technical Specifications

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v1.0, July 2009

Appendix A

Default Settings and Technical Specifications

Factory Default Settings

You can return the gateway to its factory settings. On the bottom of the gateway, press and hold the

Restore Factory Settings button

for over 7 seconds. The gateway resets, and returns to its

factory settings.

Your device will return to the factory configuration settings shown in the

following table.

Gateway Login

User login URL

User name and password (case

sensitive)

admin/password

Local Network (LAN)

LAN IP

192.168.0.1

Subnet mask

255.255.255.0

DHCP server

Enabled

DHCP starting IP address

192.168.0.10

DHCP Ending IP address

192.168.0.19

Firewall

Inbound communication from the Internet

Disabled (except traffic on port 80, the http port)

Outbound communication to the Internet

Enabled (all)

Source MAC filtering

Disabled

Internet Connection

WAN MAC address

Use default hardware address

WAN MTU size

1500

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Default Settings and Technical Specifications

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Technical Specifications

The table below describes the technical specifications for the gateway.

Wireless

Wireless communication

Enabled

SSID name

Wireless

Security

Disabled

Broadcast SSID

Enabled

Transmission speed

Auto

a

Country/region

United States (varies by region)

RF channel

6

Operating mode

g and b

Data rate

Best

Output power

Full

Access point

Enabled

Authentication type

Open System

Wireless card access list

All wireless stations allowed

a. Maximum Wireless signal rate derived from IEEE Standard 802.11 specifications. Actual throughput will

vary. Network conditions and environmental factors, including volume of network traffic, building

materials and construction, and network overhead, lower actual data throughput rate.

Feature

Description

Network Protocol and Standards Compatibility

Data and Routing Protocols:

TCP/IP, DHCP server and client, DNS relay, NAT (many-to-one),

TFTP client, VPN pass through (IPSec, PPTP)

Power Adapter

North America (input):

120V, 60 Hz, input

All regions (output):

15 V DC @ 1.2A output, 15W maximum

Physical Specifications

Dimensions:

6.9 by 4.5 by 1.2 in. (175 by 114 by 30 mm)

Weight:

0.68 lb (0.31 kg)