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Chapter 3: Networking
Illustrations contained in this document are for representation only.
59
IP Stack 3 - for use by you to remotely (i.e. from somewhere on the WAN side, such as at your remote
workplace) communicate with the Cable Modem and Networking sections, to remotely access the
internal web page diagnostics and configuration. This stack is also used by your cable company to
deliver packets
between the Internet and the gateway’s networking section so they can be routed
to/from your PCs. This stack requires an IP address assigned by the cable company from their pool of
available addresses. Your cable company may have you or your installer manually enter assigned
addresses into your gateway, or use a DHCP Server to communicate them, or use a method that
involves you entering host names. This stack uses a MAC address of MAC label + 2 (the MAC label
is found on the bottom of the unit). E.g., if the MAC address is 00:90:64:12:B1:91, this MAC address
would be 00:90:64:12:B1:93.
IP Stack 5 - for use by you to locally (i.e. from somewhere on the LAN side in your home)
communicate with the Cable Modem and Networking sections, to access the internal web page
diagnostics and configuration. This stack is also used by the gateway’s networking section to route
packets between the gateway’s Networking section and your PCs. This stack uses a fixed IP address:
192.168.0.1. It uses a MAC address of MAC label + 4 (the MAC label is found on the bottom of the
unit). E.g., if the MAC address is 00:90:64:12:B1:91, this MAC address would be 00:90:64:12:B1:95.
With RG Mode, your cable company must provide one IP address for the CM section, plus one for the
Networking section, from their pool of available addresses. With RG Mode, each PC you connect gets an
IP address from a DHCP Server that is part of the Networking section of the gateway.
CableHome (CH) Mode
Fig. 51
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Chapter 3: Networking
60
Illustrations contained in this document are for representation only.
CH (CableHome) Mode provides all the functionality of RG mode and adds the ability of the cable company to
control the home networking configuration of your Wireless Cable Gateway for you, so you don’t need to perform
the configuration yourself. In this mode, four IP stacks are active:
IP Stack 1 - for use by the cable company to communicate with the Cable Modem section only. This stack
receives its IP address from the cable company during CM initialization. It uses the MAC address printed on
the label attached to the Wireless Cable Gateway.
IP Stack 3 - for use by your cable company to communicate with the Networking section to help you configure
and manage your home networking. This stack requires an IP address assigned by the cable company from their
pool of available addresses. Your cable company may have you or your installer manually enter assigned
addresses into your gateway, or use a DHCP Server to communicate them, or use a method that involves you
entering host names. This stack uses a MAC address of MAC label + 2 (the MAC label is found on the bottom
of the unit). E.g., if the MAC address is 00:90:64:12:B1:91, this MAC address would be 00:90:64:12: B1:93.
IP Stack 4 - for use by you to remotely (i.e. from somewhere on the WAN side, such as at your remote
workplace) communicate with the Cable Modem and Networking sections, to remotely access the internal web
page diagnostics and configuration. This stack is also used by your cable company to deliver packets between
the Internet and the Wireless Cable Gateway’s Networking section so they can be route
d to/from your PCs.
This stack requires an IP address assigned by the cable company from their pool of available addresses. Your
cable company may have you or your installer manually enter these assigned addresses into your gateway, or
use a DHCP Server to communicate them, or use a method that involves you entering host names. This stack
uses a MAC address of MAC label + 3 (the MAC label is found on the bottom of the unit). E.g., if the MAC
address is 00:90:64:12:B1:91, this MAC address would be 00:90: 64:12:B1:94.
IP Stack 5 - for use by you to locally (i.e. from somewhere on the LAN side in your home) communicate with
the Cable Modem and Networking sections, to access the internal web page diagnostics and configuration. This
stack is also used by the Wireless Cable Gateway Networking section to route packets between the Wireless
Cable Gateway’s Networking section and your PCs. This stack uses a fixed IP address: 192.168.0.1. It uses a
MAC address of MAC label+ 4 (the MAC label is found on the bottom of the unit). E.g., if the MAC address is
00:90:64:12:B1:91, this MAC address would be 00:90:64:12:B1:95.
With CH Mode, your cable company must provide one IP address for the CM section, plus two for the Networking
section, from their pool of available addresses. Each PC you connect gets an IP address from a DHCP Server that is
part of the Networking section of the gateway.
Page 68 / 76
Chapter 3: Networking
Illustrations contained in this document are for representation only.
61
MAC and IP Addresses Summary
This table summarizes all the MAC and IP addresses that may be associated with the TCP/IP
communication stacks in your Wireless Cable Gateway. The ones actually used depend upon your
gateway Operating Mode, as explained above. At minimum, your cable company will need to know the
MAC address associated with IP Stack 1, which is the MAC address shown on the modem label.
Stack Name
Purpose - Mode
MAC Address
IP Address
IP Stack 1
IP Stack 2
CM WAN access - all Modes
local management - CM Mode
per label on CM
assigned by cable company
during initialization
IP Stack 3
IP Stack 4
only
CM label + 1
fixed at 192.168.100.1
IP Stack 5
---
CableHome remote management
- CH Mode only
end-user remote management,
LAN WAN access - RG Mode
only
CM label + 2
CM label + 3
assigned by cable company
assigned by cable company
WAN data access -
CH Mode only
CM label + 4
fixed at 192.168.0.1
local management -
RG, CH Modes only
LAN gateway
CM label + 5
MAC and IP Addresses
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Chapter 4: Additional Information
62
Illustrations contained in this document are for representation only.
Chapter 4: Additional Information
Frequently Asked Questions
Q. What if I don’t subscribe to cable TV?
A. If cable TV is available in your area, data and voice service may be made available with or without
cable TV service. Contact your local cable company for complete information on cable services,
including high-speed internet access.
Q. How do I get the system installed?
A. Professional installation from your cable provider is strongly recommended. They will ensure proper
cable connection to the modem and your computer. However, your retailer may have offered a self
installation kit, including the necessary software to communicate with your cable ISP.
Q. My modem is connected to the power sector but does not work
A.Check the ON/OFF button on the rear panel of your modem. Should be set to ―1‖
Q. Once my Wireless Gateway is connected, how do I get access to the Internet?
A. Your local cable company provides your internet service*, offering a wide range of services including
email, chat, and news and information services, and a connection to the World Wide Web.
Q. Can I watch TV, surf the Internet, and talk to my friends through the Wireless Gateway at
the same
time?
A. Absolutely!
Q. What do you mean by “Broadband?”
A. Simply put, it means you’ll be getting information through a ―bigger pipe,‖ with more bandwidth, than
a standard phone line can offer. A wider, ―broader‖ band means
more information, more quickly.
Q. What is EURO-DOCSIS and what does it mean?
A. ―Data over Cable Service Interface Specifications‖ is the industry standard that most cable companies
are adopting as they upgrade their systems. Should you ever decide to move, the Wireless Gateway will
work with all upgraded cable systems that are EURO-DOCSIS-compliant.
Q. What is Xpress Technology and what does it mean?
A. It is one of the popular performance-enhancing WiFi technologies, designed to improve wireless
network efficiency and boost throughput. It is more efficient in mixed environments, and it can work with
802.11a/b/g networks. When Xpress is turned on, aggregate throughput (the sum of the individual
Page 70 / 76
Chapter 4: Additional information
Illustrations contained in this document are for representation only.
63
throughput speeds of each client on the network) can improve by
up to
27% in 802.11g-only networks,
and
up to
75% in mixed networks comprised of 802.11g and 802.11b standard equipment. The
technology achieves higher throughput by by re-packaging data, reducing the number of overhead control
packets, so that more useful data can be sent during a given amount of time.
* Monthly subscription fee applies.
**
Additional equipment required. Contact your cable company and ISP for any restrictions or additional
fees.

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