Netgear Cg30002 Status Manual

							41
6
6.   Troubleshooting
This chapter gives information about troubleshooting your NETGEAR Wireless Cable Gateway 
CG3000. For the common problems listed, go to the section indicated.
•     Have I connected the gateway correctly?
Go to Basic Functions on page 42.
•     I cannot access the gateway configuration with my browser.
Go to Access the Gateway Configuration on page 43.
•     I have configured the gateway but I cannot access the Internet.
Go to Troubleshoot the ISP Connection on page 44.
•     I cannot remember the gateway’s configuration password or I want to clear the 
configuration and start over again.
Go to Factory Default Settings  in Appendix A.
Tip:  NETGEAR provides helpful articles, documentation, and the latest 
software updates at 
http://www.netgear.com/support. 
						

							Troubleshooting
42 NETGEAR Wireless Cable Gateway CG3000 
Basic Functions
After you have turned on power to the gateway, you should do the following:
1. Check to see that the Power LED is on.
2. Check that the numbered Ethernet LEDs come on momentarily.
3. After a few seconds, check that the local port link LEDs are lit for any local ports that are 
connected.
If any of these conditions does not occur, refer to the appropriate following section.
Using LEDs to Troubleshoot
The following table provides help when using the LEDs for troubleshooting.
LED BehaviorAction
All LEDS are off when the gateway 
is plugged in.Make sure that the power cord is properly connected to your gateway 
and that the power supply adapter is properly connected to a 
functioning power outlet. 
Check that you are using the 12VDC power adapter supplied by 
NETGEAR for this product.
If the error persists, you have a hardware problem and should contact 
technical support.
All LEDs Stay On • Clear the gateway’s configuration to factory defaults. This will set the 
gateway’s IP address to 192.168.0.1. See Factory Default Settings  in 
Appendix  A. 
• If the error persists, you might have a hardware problem and should 
contact technical support.
LAN LED is off for a port with an 
Ethernet connection.• Make sure that the Ethernet cable connections are secure at the 
gateway and at the hub or PC.
• Make sure that power is turned on to the connected hub or PC.
• Be sure you are using the correct cable.
Internet LED is off and the 
gateway is connected to the cable 
television cable.• Make sure that the coaxial cable connections are secure at the 
gateway and at the wall jack.
• Make sure that your cable internet service has been provisioned by 
your cable service provider. Your provider should verify that the 
signal quality is good enough for cable modem service.
• Remove any excessive splitters you may have on your cable line. It 
may be necessary to run a “home run” back to the point where the 
cable enters your home. 
						

							Troubleshooting
43  NETGEAR Wireless Cable Gateway CG3000
Access the Gateway Configuration
If you are unable to access the gateway’s configuration from a computer on your local 
network, check the following:
•     Check the Ethernet connection between the computer and the gateway as described in 
the previous section.
•     Make sure that your PC’s IP address is on the same subnet as the gateway. If you are 
using the recommended addressing scheme, your PC’s address should be in the range 
of 192.168.0.2 to 192.168.0.254.
Note:  If your PC’s IP address is shown as 169.254.x.x: 
Recent versions of Windows and MacOS will generate and assign 
an IP address if the computer cannot reach a DHCP server. These 
auto-generated addresses are in the range of 169.254.x.x. If your IP 
address is in this range, check the connection from the PC to the 
gateway and reboot your PC.
•     If your gateway’s IP address has been changed and you don’t know the current IP 
address, clear the gateway’s configuration to factory defaults. This will set the gateway’s 
IP address to 192.168.0.1. This procedure is explained in 
Factory Default Settings  in 
Appendix A.
•     Make sure your browser has Java, JavaScript, or ActiveX enabled. If you are using 
Internet Explorer, click Refresh to make sure that the Java applet is loaded.
•     Try quitting the browser and launching it again.
•     Make sure you are using the correct login information. The gateway user name admin is 
lower-case (Caps Lock should be off). The default password of password. 
If the gateway does not save changes you have made, check the following:
•     When entering configuration settings, be sure to click the Apply button before moving to 
another screen, or your changes are lost. 
•     Click the Refresh or Reload button in the Web browser. The changes may have occurred, 
but the Web browser may be caching the old configuration. 
						

							Troubleshooting
44 NETGEAR Wireless Cable Gateway CG3000 
Troubleshoot the ISP Connection
If your gateway cannot access the Internet and your Cable Link LED is on, you might need to 
register the cable MAC address and/or device MAC address of you gateway with your cable 
service provider. Your PC might 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.
Troubleshoot 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 responds with an echo reply. Troubleshooting a 
TCP/IP network is made easier by using the ping utility in your PC or workstation.
Test 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 like this:
ping 192.168.0.1
3. Click OK.
You should see a message like this one: 
Pinging  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
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 42.
-     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. 
						

							Troubleshooting
45  NETGEAR Wireless Cable Gateway CG3000
Test 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 
where  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.
•     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.
Wireless Performance and Gateway Location
The range of your wireless connection can vary significantly based on the physical placement 
of the gateway. The latency, data throughput performance, and notebook power consumption 
of wireless adapters also vary depending on your configuration choices.
For best results, place your gateway according to the following guidelines:
•     Near the center of the area in which your computers will operate.
•     In an elevated location such as a high shelf where the wirelessly connected PCs have 
line-of-sight access (even if through walls).
•     Away from sources of interference, such as PCs, microwave ovens, and 2.4 GHz 
cordless phones.
•     Away from large metal surfaces.
•     Put the antenna in a vertical position to provide the best side-to-side coverage. Put 
the antenna in a horizontal position to provide the best up-and-down coverage. 
•     To reduce interference when using more than one access point, NETGEAR 
recommends using 5 channel spacing between adjacent access points (for example, 
use Channels 1 and 6, or 6 and 11).
The time it takes to establish a wireless connection can vary depending on both your security 
settings and the gateway location. WEP connections can take slightly longer to establish. 
Also, WEP encryption can consume more battery power on a notebook computer. 
						

							46
A
A.   Technical Specifications
This chapter covers the following topics:
•     Factory Default Settings 
•     Technical Specifications on page 49 
						

							Technical Specifications
47 Product Name & Model
Factory Default Settings
You can return the product family to its factory settings. On the bottom of the product family, 
press and hold the Restore Factory Settings button   for over 7 seconds. The product 
family resets, and returns to its factory settings.
 Your device will return to the factory 
configuration settings shown in the following table.
Table 1.  
Factory Default Settings   
Gateway Login User login URL http://192.168.0.1
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 192.168.0.2
DHCP Ending IP address 192.168.0.254
Firewall Inbound communication from the 
InternetDisabled (except traffic on port 80, the http port)
Outbound communication to the 
InternetEnabled (all)
Source MAC filtering Disabled
Internet 
connectionWAN MAC address Use default hardware address
WAN MTU size 1500 
						

							Technical Specifications
48 Product Name & Model
Wireless Wireless communication Enabled
SSID name As shown on the product label.
Security WPA/WPA2
Broadcast SSID Enabled
Transmission speed Auto
1
Country/region Depends on the country where the product is sold.
RF channel Auto
Operating mode n, g, and b
Data rate Best
Output power Full
Access point Enabled
Authentication type Open System
Wireless card access list All wireless stations allowed
1. 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, may lower actual data throughput rate.
Table 1.  
Factory Default Settings  (Continued) 
						

							Technical Specifications
49 Product Name & Model
Technical Specifications
The following table describes the technical specifications for the product family.
Table 2.  
Technical Specifications 
Network protocol and 
standards compatibilityData 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): 12 V DC @ 1.5A output 18W maximum or  
12 V DC @ 2.5A output 30W maximum
Physical specifications • Dimensions: 8.5 by 5.75 by 1.3 in (216 by 146 by 33 mm)
• Weight: 0.95 lb (0.42 kg)
Environmental • Operating temperature: 32° to 140° F (0° to 40° C)
• Operating humidity: 90% maximum relative humidity, noncondensing
• Electromagnetic emissions: Meets requirements of: FCC Part 15 Class B.
Interface Local: 10BASE-T, 100/1000BASE-Tx, RJ-45
USB 2.0/1.1 function
802.11n/g/b
Internet: DOCSIS 3.0. Downward compatible with DOCSIS 2.0, 1.1 and 1.0 
						

							50
B
B.   Notification of Compliance
Europe – EU Declaratimon of Conformity 
 
Marking with the above symbol indicates compliance with the Essential Requirements of the R&TTE Directive of the 
European Union (1999/5/EC). 
This equipment meets the following conformance standards:
•  EN300 328 (2.4Ghz), EN301 489-17, EN301 893 (5Ghz), EN60950-1
•  This device is a 2.4 GHz wideband transmission system (transceiver), intended for use in all EU member states and 
EFTA countries, except in France and Italy where restrictive use applies.
•  In Italy, the end-user should apply for a license at the national spectrum authorities in order to obtain authorization to 
use the device for setting up outdoor radio links and/or for supplying public access to telecommunications and/or 
network services.
•  This device may not be used for setting up outdoor radio links in France and in some areas the RF output power 
may be limited to 10 mW EIRP in the frequency range of 2454 – 2483.5 MHz. For detailed information the end-user 
should contact the national spectrum authority in France.
•  For complete DoC, visit the NETGEAR EU Declarations of Conformity website at: http://kb.netgear.com/app/answers/detail/a_id/11621/
Table 3.  
Cesky [Czech]NETGEAR Inc.  tímto prohlašuje, že tento Radiolan je ve shode se 
základními požadavky a dalšími príslušnými ustanoveními smernice 
1999/5/ES.
Dansk [Danish]Undertegnede NETGEAR Inc. erklærer herved, at følgende udstyr Radiolan overholder de 
væsentlige krav og øvrige relevante krav i direktiv 1999/5/EF.
Deutsch 
[German]Hiermit erklärt NETGEAR Inc., dass sich das Gerät Radiolan in Übereinstimmung mit den 
grundlegenden Anforderungen und den übrigen einschlägigen Bestimmungen der Richtlinie 
1999/5/EG befindet.
Eesti [Estonian]Käesolevaga kinnitab NETGEAR Inc. seadme Radiolan vastavust direktiivi 1999/5/EÜ 
põhinõuetele ja nimetatud direktiivist tulenevatele teistele asjakohastele sätetele.
EnglishHereby, NETGEAR Inc., declares that this Radiolan is in compliance with the essential 
requirements and other relevant provisions of Directive 1999/5/EC.
Español 
[Spanish]Por medio de la presente NETGEAR Inc. declara que el Radiolan cumple con los requisitos 
esenciales y cualesquiera otras disposiciones aplicables o exigibles de la Directiva 
1999/5/CE.