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Page 16 / 27 Scroll up to view Page 11 - 15
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Connecting to the Internet • Checking for an Internet Connection
SB6121 DOCSIS 3.0® Cable Modem • Installation Guide
10
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4
Connecting to the Internet
Checking for an Internet Connection
After installing your cable modem, you are now ready to connect your computer and
other network devices to the Internet.
1.
Open a web browser window on your computer.
2.
Type
www.motorola.com
in the Address bar.
If the Motorola website appears, you have successfully connected to the Internet. If you
do not see the Motorola website, you may need to configure your cable modem to
retrieve an IP address. For more information, see the Configuring TCP/IP section for your
operating system.
Configuring TCP/IP for Windows 7
1.
Click
Start
and then click
Control Panel
.
2.
Click
Network and Internet
to display the Network and Internet window.
3.
Click
Network and Sharing Center
to display the Network and Sharing Center
window.
4.
Click
Change adapter settings
to display the LAN or High-Speed Internet
connections window.
5.
Right-click the network connection for your network interface.
6.
Select
Properties
to display the Local Area Connection Properties window.
7.
Select
Internet Protocol Version 4 or 6 (TCP/IPv4 or v6)
and click
Properties
to
display the Internet Protocol Properties window.
8.
Select
Obtain an IP address automatically
and
Obtain DNS server address
automatically
.
9.
Click
OK
to save the TCP/IP settings and close the Internet Protocol Version 4
(TCP/IPv4) Properties window.
10.
Click
Close
to close the Local Area Connection Properties window.
11.
Close the remaining windows and exit the Control Panel.
When you complete the TCP/IP configuration, go to
Verifying the IP Address for
Windows 7
.
Page 17 / 27
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Connecting to the Internet • Configuring TCP/IP for Windows Vista
SB6121 DOCSIS 3.0® Cable Modem • Installation Guide
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Configuring TCP/IP for Windows Vista
1.
Click
Start
and then click
Settings
.
2.
Open the
Control Panel
.
3.
Double-click
Network and Internet
to display the Network and Internet window.
4.
Double-click
Network and Sharing Center
to display the Network and Sharing
Center window.
5.
Click
Manage network connections
to display the LAN or High-Speed Internet
connections window.
6.
Right-click the network connection for your network interface.
7.
Select
Properties
to display the Local Area Connection Properties window.
Vista may prompt you to allow access to the Network Properties Options. If you see
the prompt,
User Account Control -- Windows needs your permission to
continue
, click
Continue
.
8.
Select
Internet Protocol Version 4 or 6 (TCP/IPv4 or v6)
and click
Properties
to
display the Internet Protocol Properties window.
9.
Select
Obtain an IP address automatically
and
Obtain DNS server address
automatically
.
10.
Click
OK
to save the TCP/IP settings and close the Internet Protocol Version 4
(TCP/IPv4) Properties window.
11.
Click
OK
to close the Local Area Connection Properties window.
12.
Close the remaining windows and exit the Control Panel.
When you complete the TCP/IP configuration, go to
Verifying the IP Address for
Windows Vista
.
Configuring TCP/IP for Windows XP
1.
Click
Start
and then click
Settings
.
2.
Click
Control Panel
.
3.
Double-click
Network Connections
to list the Dial-up and LAN or High-Speed
Internet connections.
4.
Right-click the network connection for your network interface.
5.
Select
Properties
from the drop-down menu to display the Local Area Connection
Properties window. Be sure Internet Protocol (TCP/IP) is checked.
6.
Select
Internet Protocol (TCP/IP)
and click
Properties
to display the Internet
Protocol (TCP/IP) Properties window.
7.
Select
Obtain an IP address automatically
and
Obtain DNS server address
automatically
.
8.
Click
OK
to save the TCP/IP settings and exit the TCP/IP Properties window.
9.
Close the Local Area Connection Properties window and then exit the Control Panel.
When you complete the TCP/IP configuration, go to
Verifying the IP Address for
Windows XP.
Page 18 / 27
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Connecting to the Internet • Verifying the IP Address for Windows 7
SB6121 DOCSIS 3.0® Cable Modem • Installation Guide
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Verifying the IP Address for Windows 7
1.
On the Windows taskbar, click
Start
.
2.
Click
All Programs
.
3.
Click
Accessories
.
4.
Click
Run
to open the Run window.
5.
Type
cmd
and click
OK
to open a command prompt window.
6.
Type
ipconfig
and press
Enter
to display the IP Configuration.
If an Auto-configuration IP address is displayed, that indicates possible broadband
network problems or an improper connection between your computer and the SB6121.
The Auto-configuration IP address, ranging from
169.254.0.0
to
169.254.255.255
, is
reserved for Automatic Private IP Addressing (APIPA).
Verifying the IP Address for Windows Vista
1.
On the Windows taskbar, click
Start
.
2.
Click
All Programs
.
3.
Click
Accessories
.
4.
Click
Run
to open the Run window.
5.
Type
cmd
and click
OK
to open a command prompt window.
6.
Type
ipconfig
and press
Enter
to display the IP Configuration.
If an Auto-configuration IP address is displayed, that indicates possible broadband
network problems or an improper connection between your computer and the SB6121.
The Auto-configuration IP address, ranging from
169.254.0.0
to
169.254.255.255
, is
reserved for Automatic Private IP Addressing (APIPA).
Verifying the IP Address for Windows XP
1.
On the Windows taskbar, click
Start
.
2.
Select
Run
to open the Run window.
3.
Type
cmd
and click
OK
.
4.
Type
ipconfig
and press
Enter
to display your IP configuration.
If an Auto-configuration IP address is displayed, that indicates possible broadband
network problems or an improper connection between your computer and the SB6121.
The Auto-configuration IP address, ranging from
169.254.0.0
to
169.254.255.255
, is
reserved for Automatic Private IP Addressing (APIPA).
This can occur if the modem is configured to automatically obtain an IP address from a
Dynamic Host Configuration Protocol (DHCP) server. When Auto-configuration is
enabled, Windows will automatically assign an IP address if the cable Modem is unable
to obtain one. Because this automatically assigned IP address is not valid, you will not be
able to access the Internet using the cable modem. Check the following:
•
Your cable connections
•
Whether you can see cable-TV channels on your television
Page 19 / 27
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Connecting to the Internet • Renewing the IP Address for Windows 7, Vista, or XP
SB6121 DOCSIS 3.0® Cable Modem • Installation Guide
13
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After successfully verifying your cable connections and proper cable-TV operation, you
can renew your IP address. See
Renewing the IP Address
for more information.
Renewing the IP Address for Windows 7, Vista, or XP
1.
Open a command prompt window.
A.
From the Windows taskbar, click
Start
.
B.
Select
Run
to open the Run window.
C.
Type
cmd
and click
OK
to open a command prompt window.
2.
Type
ipconfig /renew
and press
Enter
. A valid IP address should appear
indicating that Internet access is available.
3.
Type
exit
and press
Enter
to close the command prompt window.
If, after performing this procedure, your computer still cannot access the Internet, call
your service provider.
Page 20 / 27
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Monitoring Your Modem • Starting the Modem Configuration Manager
SB6121 DOCSIS 3.0® Cable Modem • Installation Guide
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5
Monitoring Your Modem
Use the SB6121 Modem Configuration Manager to monitor the various configuration
settings and operational status of your cable modem. You can also reset the modem
configuration back to the original factory settings.
Starting the Modem Configuration Manager
1.
Open any web browser on a computer connected to your cable modem.
2.
Type
in the Address bar.
3.
Press
Enter
.
The following Modem Configuration Manager Status page appears when you first
log on.
Note
: If you cannot access the HTML pages in the Modem Configuration Manager,
please contact your service provider for more information.

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