Configuration
Installing Cable Modem Software Drivers
| Windows 98SE
Operating System
| Windows Me Operating System | Windows
2000 Operating System
| Windows XP Operating System
| Wireless LAN Configuration | Telnet Configuration Methods
| Accessing the Wireless Cable Modem Telnet Interface
| Required Installation Configuration in Telnet
| Common Configuration ExampleNAT in Telnet
| Managing Modem Access from IP or MAC Addresses
The following table displays the mandatory configuration sections according to the type of wireless cable modem installation:
Type of Wireless Cable Modem Installation
Configuration Required Wireless Ethernet USB Macintosh
Installing the Cable Modem Software Drivers X Wireless LAN Configuration X X X X Required Installation Configuration in Telnet X X X X Back to Top
Installing Cable Modem Software Drivers
The following sections detail the steps to install the cable modem software drivers on specific operating systems.
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Windows 98SE Operating System
This section explains how to install the software drivers that the PC with a Windows 98SE Operating System requires for the cable modem to operate.
Note: Install the drivers located on the CD that ships with the cable modem. If
To install the software drivers, complete the following steps:
1. Turn on the computer. After the computer boots, Windows will detect the cable modem. The Found New Hardware screen appears, followed by the following Add New Hardware Wizard screen. Insert the CD into the PC’s CD-ROM. Click the Next button.
2. Select Automatic search for a better driver (Recommended) and click the Next button.
3. Select The updated driver (Recommended) Ambit USB Cable Modem and click the Next button.
4. Check the ROM drive checkbox and verify that the CD is in the CD-ROM drive. Click the Next button to have Windows search for the necessary driver files.
5. Verify that Ambit USB Cable Modem appears on the screen. If USB Composite Device appears, click the Back button twice and specify the correct location of the driver files. DO NOT proceed if USB Composite Device is displayed. Contact Time Warner Cable Support for further assistance. Click the Next button. The computer will automatically install the necessary driver files.
6. If a screen to insert the Windows 98 CD so that Windows can copy the remaining files appears, insert the CD.
7. Indicate the path of the CD and click the Next button. 8. Click the Finish button to complete the installation. 9. When prompted, choose Yes to restart the computer.
10. After the computer is rebooted, verify that the USB LED is lit on the front of the cable modem. If the USB LED is not lit, refer to Troubleshooting. In addition, refer to Wireless Cable Modem Registration LEDs for more information.
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Windows Me Operating System
This section explains how to install the software drivers that the PC with a Windows Me Operating System requires for the cable modem to operate. To install the software drivers, complete the following steps:
1. Refer to Steps 1 and 2 in Windows 98SE Operating System.
2. The computer automatically copies the necessary driver files from the CD. After the computer has finished copying the files, click Finish.
4. Refer to Wireless Cable Modem Registration LEDs for more information.
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Windows 2000 Operating System
This section explains how to install the software drivers that the PC with a Windows 2000 Operating System requires for the cable modem to operate. To install the software drivers, complete the following steps:
1. Turn on the computer. After the computer boots, Windows will detect the cable modem. The Found New Hardware screen appears, followed by the Found New Hardware Wizard screen. Insert the CD into the PC’s CD-ROM. Click the Next button.
2. Select Search for a suitable driver for my device (recommended) and click Next.
3. Check the ROM drive checkbox and verify that the CD is in the CD-ROM drive. Click the Next button to have Windows locate the necessary driver files.
4. Click the Next button to install the driver files for the cable modem. 5. Click the Finish button to complete the installation.
6. After the installation is complete, verify that the USB LED is lit on the front of the cable modem. If the USB LED is not lit, refer to Troubleshooting. In addition, refer to Wireless Cable Modem Registration LEDs for more information.
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Windows XP Operating System
This section explains how to install the software drivers that the PC with a Windows XP Operating System requires for the cable modem to operate. To install the software drivers, complete the following steps:
1. Turn on the computer. After the computer boots, Windows will detect the cable modem. The Found New Hardware screen appears, followed by the Found New Hardware Wizard screen. Choose the Install software
automatically (Recommended). Click the Next button. 2. To complete the installation, click the Finish button.
3. Refer to Wireless Cable Modem Registration LEDs for more information.
Wireless LAN Configuration
The Wireless Configuration page is accessed through the Web User Interface Advanced Menu (refer to Accessing the Web User Interface). While the Wireless LAN Configuration page addresses some of the mandatory configuration settings necessary with the Ambit Wireless Cable Modem, Time Warner Cable divisions must also complete the mandatory configuration settings.
The following table details the fields on the Wireless LAN Configuration Main Page that must be completed:
Field Name Description
Service Set ID (SSID)
Mandatory
SSID is used to organize the wireless network into groups. Enter the SSID as designated by division policy. The wireless clients must have the same SSID to communicate with each other. The default is ‘WLCM’ and can be left as is.
Host Optional
The default setting for the wireless cable modem name acting as HOST is ‘WCLM’.
Channel Mandatory
There are 11 channels available for the US. The wireless
communication channel can be specified in the Channel field. If there are multiple wireless cable modems or access points in the same area, the wireless channels should be well organized to avoid interference. Adjacent wireless cable modems or access points should be 5 channels apart. For example, if WLCM#1 is channel 1, then the next modem, WLCM#2, should use channel 6.
Time Warner Cable recommends Channel 6, which is the
default channel setting. If interference is suspected, try channel 1 or channel 11.
There are three concurrent non-overlapping channels; 1, 6, and 11.
Security Wired Equivalent Privacy (WEP) Mandatory
Security WEP offers wireless data security. WEP is an encryption scheme used to protect the wireless data
communications. The default setting is ‘off’. To enable this function choose key type 64 bit. The Time Warner Cable Standard is 64-bit encryption.
AP and the wireless client must use the same WEP key in order to communicate.
Field Name Description
Mandatory installations. Access
Permission Optional
Access Permission is used to enhance security or limit access. By default, Access Permission is set for ‘Allow everyone
access’.
If Access Permission is set for ‘Only allow access if on this list’, only CPEs with matching MAC addresses from the list are allowed access.
MAC addresses of wireless clients to the Permission list in the New Stations field can be added or deleted from the Existing Stations field.
1. After finishing the wireless configuration setting, click Submit to enable the changes or Reset the fields.
2. The Wireless Cable Modem screen will appear to confirm submission.
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Telnet Configuration Methods
While the Web User Interface Wireless LAN Configuration page allows some configuration settings to be made, there are several mandatory configuration settings that must be done by accessing Telnet.
The Ambit Wireless Cable Modem allows multiple Telnet configuration methods based on the division requirements. The following options are available:
Configuration Method
Description Pros Cons Recommendation
Automated Utility In this option (expected to be available in February 2003), Ambit will provide a utility that
automatically logs the user into telnet using local access and configures the modem based on a
Only requires one-click to configure the modem. The password is stored in utility so there is no need to
manually input. MSO has flexibility to use any
configuration option in the utility.
Configuration Description Pros Cons Recommendation Method
pre-determined script. This
eliminates the need to manually log-in to the modem’s Telnet interface. In addition, the utility will automatically set the modem’s 64-bit WEP key to the last 10 characters of the modem’s MAC address. 128-bit encryption is also available. Remote Configuration via Telnet
In this option, the installer installs the modem at the subscriber’s home. Once the modem is installed, the modem can be accessed remotely via the modem’s 10.x.x.x IP address. Telnet into the modem using its 10.x.x.x IP address and then configure the modem. Commands can be manually issued to the modem or a script file can be copied into Telnet to reduce
configuration times.
Reduced risk of abuse and error by having information entered remotely. Also avoids the possibility of password being exposed to end-user. Great for post-installation support to avoid a truck-roll. Potential security risk as users within the same 10.x closed network can access the modem if the username/ password is known. Security Risk
Note: For security
purposes, users outside of the 10.x.x.x closed private network cannot access the modem. Users on the public network cannot access the modem remotely. To reduce the risk of unauthorized access, the password can be changed. In addition, remote access to telnet can be disabled at any time via a telnet command or MIB.
Local
Configuration via
Configuration Description Pros Cons Recommendation Method
Telnet configured prior to field deployment or by the installer after the modem has been installed. The modem can be accessed locally via the modem’s 192.168.100.1 IP address. Commands can be manually issued to the modem or a script file can be copied into Telnet to reduce
configuration times.
those familiar with CLI format. error due to manual configuration. Requires more technical knowledge to configure. Requires that password be inputted manually. Web User Interface Configuration Expected to be available in March as firmware upgrade. In this option, the modem can be configured locally or remotely via web interface. Local access is allowed via
Accessing the Wireless Cable Modem Telnet
Interface
To access the Telnet Interface complete the following steps:
1. The Wireless LAN Cable Modem Telnet Interface can be accessed remotely or locally. If accessed remotely, the Wireless Cable Modem’s DHCP-assigned IP address must be used. If accessed locally, telnet to 192.168.100.1 (this is the default Wireless LAN Cable Modem Router Telnet IP address).
2. Enter the Cable Router Telnet login and password assigned to the Division Personnel by Ambit. Each authorized user will receive the login and password for his/her appropriate user level. There are four user levels based on the required access rights for the tasks related to the user functions. Ambit and the Time Warner Cable Division will determine the appropriate user level for personnel needing access to Telnet.
Engineering, Installers, and Support Personnel will need access to Telnet.
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Required Installation Configuration in Telnet
At the time of installation, the first two settings MUST be configured via Telnet. The third command can be set through the web Access User Interface or directly in Telnet. The final step is to enter the reset command to save the new settings and verify that the configuration is correct. The following steps details this process:
1. NAT must be enabled directly in Telnet. The command to enable NAT is the following:
• Telnet Syntax: ip nat enable
2. The number of computers to be included in the network must be indicated in the IP pool setting directly in Telnet. The Time Warner Cable minimum is two and the maximum is four.
The factory default setting is 20 in Pool Index 1. The default setting must first be deleted before the new setting can be entered. Two commands will be
necessary: ’dhcp ip pool delete 1’ to delete the default Pool Index 1and then ‘dhcp ip pool add (the first IP address to be included and then the last IP address to be included). See Set the DHCP server IP pool range for more information on this command.
• Telnet Syntax: dhcp ip-pool delete 1
This command must be executed in order to limit the number of devices a customer can add to the home network.
3. WEP must be enabled and the key established. This can be done directly in Telnet or via the Web Access User Interface.
If Telnet is used directly to enter this information, 64 bits is the Time Warner Cable encryption standard with Ambit’s Wireless Cable Modem. Ten
hexadecimal digits will need to be established as the key.
• Telnet Syntax: interface wireless wep 64bits key (xxxxxxxxxx) 4. The Division will need to establish a common key to use in all installations.
Replace xxxxxxxxxx in the above syntax with the selected key.
5. Enter the reset command to put the new configuration into effect. Settings will not be saved until the reset command is executed.
• Telnet Syntax: reset
6. Finally, enter the Show the System Running Information command (‘show running-configuration’) to verify that all settings are appropriate per the Time Warner Cable and division standards.
• Telnet Syntax: show running configuration
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Common Configuration Example
Four PCs to connect to cable modem using NAT and enable WEP on the modem 192.168.100.2~192.168.100.5 is the desired DHCP IP pool setting 64bits WEP key (last 10 Hexadecimal digits from the modem MAC address are used as the key in this example).
Telnet command syntax: CM>ip nat enable
CM>dhcp ip-pool delete 1 (Note: IP-pool 1 has a default of 20 IPs) CM>dhcp ip-pool add 192.168.100.2 192.168.100.5
CM>interface wireless wep 64bits key 028A0EE9DD CM>reset
Set the Wireless LAN Cable Router Access Point Set the Service Set ID (SSID)
Note: This setting must be entered but can be done using the Web User
Interface SSID (mandatory). (SSID) as designated by division policy. The same SSID must be assigned to all wireless devices in the network. The default SSID is WLCM.
User: Installer (depending on the Telnet configuration method selected by the division) and TWC Support.
When: Installation, Maintenance, or Troubleshooting. Telnet Syntax: interface wireless ssid {ssid name} Example:
CM>interface wireless ssid Ambit This example sets the SSID to Ambit.
Set the Wireless LAN Cable Router Channel
Note: This setting must be entered but can be done using the Web User
Interface Channel (mandatory). The default setting is channel 6, which is the Time Warner Cable Standard.
If the Telnet command must be used instead of the Web User Interface, the command is as follows:
User: Installer (depending on the Telnet configuration method selected by the division) and TWC Support.
When: Installation, Maintenance, or Troubleshooting. Telnet Syntax: interface wireless channel {1~11} Example:
CM>interface wireless channel 6
This example sets the wireless channel to Channel 6. Set the Wireless LAN Cable Router Access Point WEP key
Note: This setting must be entered but can be done using the Web User
Interface WEP Key (mandatory). The Time Warner Cable Standard is 64 bit encryption, which consists of ten (10) hexadecimal digits (any combination of 0-9, af, or A-F).
The Division will need to establish a common key to use in all installations. If the Telnet command must be used instead of the Web User Interface, the command is as follows:
User: Installer (depending on the Telnet configuration method selected by the division) and TWC Support.
When: Installation, Maintenance, or Troubleshooting. Telnet Syntax: interface wireless wep {64bits|128bits } key (xxxxxxxxxx|xxxxxxxxxxxxxxxxxx)
Note: The standard encryption key type for Time Warner Cable is 64- bits with
Disable the Wireless LAN Cable Router Access Point WEP Key
User: Installer (depending on the Telnet configuration method selected by the division) and TWC Support.
When: Installation (only if needed to get the desired WEP setting configured) or Troubleshooting.
Telnet Syntax: interface wireless wep disable
Note: WEP must not be left disabled. It may be used when Troubleshooting
during or post installation.
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NAT in Telnet
Network Address Translation/Port Address Translation (NAT/PAT) gateway is designed for IP address simplification and conservation, as it enables a private IP network that uses no registered IP addresses to connect to the Internet.
NAT/PAT operates on a wireless LAN cable modem, connecting to the Internet, and translates the private (not globally unique) addresses in the internal network into legal addresses before packets are forwarded onto the Internet. As part of this functionality, NAT can be configured to advertise only one address for the entire network to the outside world. This provides additional security, effectively hiding the entire internal network from the world behind that address. NAT has the dual functionality of security and address conservation, and is typically implemented in remote access environments.
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Managing Modem Access from IP or MAC
Addresses
There are four types of commands used to block specific IP addresses or MAC addresses from accessing the modem.
• The standard IP access list performs packet filtering based on source IP address from the CPE host(s). (Access list numbers 1~20 in the
command line points to this type of filtering.)
• Manage Telnet access: The management access list performs packet filtering based on destination IP address matching the Wireless LAN Cable Router IP address. Management access includes Telnet, Web based interface, & SNMP. (Access list numbers 21~40 in the command line points to this type of filtering.)
(Access list numbers 41~60 in the command line points to this type of filtering.)
• The wireless MAC access list performs filtering based on the source MAC address from the wireless card. Configuring this list will make only the wireless card’s MAC address that match this list able to associate to the wireless AP. (Access list numbers 61~80 in the command line points to this type of filtering.)
The number selected for the access list in the command line indicates the type of filtering to be executed. The following numbering conventions must be followed: 1~20, access list ID, for the standard IP access list
21~40, access list ID, for the management (Telnet) access list 41~60, access list ID, for the standard MAC access list
61~75, access list ID, for the Wireless MAC access list
