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System Architecture Overview 57
Chapter 3

System Architecture Overview

This chapter provides an overview of the G10 CMTS’s system architecture, discussing the
following topic s:
!JUNOSg Internet Software Overview on page 57
!Data Path Processing on page62

JUNOSg Internet Software Overview

The JUNOSg software provides Internet Protocol (IP) routing so ftware, as well as software for
interface, cable, network, and chassis management.
The software runs on the CMTS’s Routing Engine. The software consists of processes tha t
support Internet routing protocols, control the CMTS’s interfaces and the CMTS chassis itself,
and allow system management of the CMTS. All these processes run on top of a kernel that
provides the communication among all the processes and h as a direct link to the Packet
Forwarding Engine software. You use the JUNOSg software to configure the routing protocols
that run on the CMTS and properties of the interfaces in the CMTS. After you have activated a
software configuration, you can use the software to monitor the protocol traffic passing
through the CMTS and to troubleshoot protocol, network, and HFC network connectivity
problems.
This section discusses the following topics to provide an overview of the components of the
software and of how to use the software:
!Routing Engine Software Components on page 58
!Tools for Accessing and Controlling the Software on page 61
!Software Monitoring Tools on page61
!Software Installation and Upgrade Procedures on page61
For complete information about configuring the software, including examples, see the
JUNOSg software configuration guides.