THOMSON TCW770 User Manual page 64

CM (Cable Modem) Mode provides basic home networking. In this mode, two 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 2 - for use by you, the end user, to communicate with the cable modem and Networking
sections, to access the internal web page diagnostics and configuration. This stack uses a fixed IP
address: 192.168.100.1. It uses a MAC address of MAC label + 1 (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:B1:92.
With CM Mode, your cable company must provide one IP address for the CM section, plus one for each
PC you connect from their pool of available addresses. Your cable company may have you or your
installer manually enter these assigned addresses into your PC, or use a DHCP Server to communicate
them to your PCs, or use a method that involves you entering host names into your PCs.
Note that in CM Mode, packets passing to the Internet to/from your PCs do not travel through any of the
IP stacks; instead they are directly bridged between the WAN and LAN sides.
Illustrations contained in this document are for representation only.
Chapter 3: Networking
Fig. 48
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