Cablehome (Ch) Mode - THOMSON TWG850-4 User Manual

Chapter 3: Networking
RG (Residential Gateway) Mode provides basic home networking plus NAT (Network Address
Translation). In this mode, three 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 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

Illustrations contained in this document are for representation only.
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Fig. 66