STATUS
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
31
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
31
HITRON CGN USER’S GUIDE
2.1.6
ROUTING MODE
When your CGN is in routing mode, it acts as a gateway for computers on the LAN to
access the Internet. The service provider assigns an IP address to the CGN on the
WAN, and all traffic for LAN computers is sent to that IP address. The CGN assigns
private IP addresses to LAN computers (when DHCP is active), and transmits the
relevant traffic to each private IP address.
NOTE:
When DHCP is not active on the CGN in routing mode, each computer on the
LAN must be assigned an IP address in the CGN’s subnet manually.
When the CGN is not in routing mode, the service provider assigns an IP address to
each computer connected to the CGN directly. The CGN does not perform any
routing operations, and traffic flows between the computers and the service provider.
Routing mode is not user-configurable; it is specified by the service provider in the
CGN’s configuration file.
2.1.7
CONFIGURATION FILES
The CGN’s configuration (or config) file is a document that the CGN obtains
automatically over the Internet from the service provider’s server, which specifies the
settings that the CGN should use. It contains a variety of settings that are not present
in the user-configurable Graphical User Interface (GUI) and can be specified only by
the service provider.
2.1.8
DOWNSTREAM AND UPSTREAM TRANSMISSIONS
The terms “downstream” and “upstream” refer to data traffic flows, and indicate the
direction in which the traffic is traveling. “Downstream” refers to traffic from the
service provider to the CGN, and “upstream” refers to traffic from the CGN to the
service provider.
2.1.9
CABLE FREQUENCIES
Just like radio transmissions, data transmissions over the cable network must exist
on different frequencies in order to avoid interference between signals.
The data traffic band is separate from the TV band, and each data channel is
separate from other data channels.
