Juniper G10 CMTS, Hardware Manual

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JUNOSg 3.0 G10 CMTS Hardware Guide
iv
Data Packet Processing .......................................................................... 32
Higher Layer Functions ................................................................... 33
MAC Layer Functions ...................................................................... 34
Physical Layer Functions................................................................. 34
Modem Management .............................................................................35
MAC Layer Scheduling .................................................................... 35
Cable Modem Management ............................................................35
Enhanced Routing and Bridging Features............................................... 35
Physical and Electrical Characteristics ........................................................... 36
Chassis Control Module ........................................................................................37
Functional Characteristics.............................................................................. 38
Configuration, State, and Alarm Data ..................................................... 40
Physical and Electrical Characteristics ........................................................... 40
NIC Module........................................................................................................... 42
Functional Characteristics.............................................................................. 44
Physical and Electrical Characteristics ........................................................... 44
Chassis Rear Modules ........................................................................................... 48
NIC Access Module ........................................................................................48
HFC Connector Module ................................................................................. 50
Switched I/O Module ..................................................................................... 53
Hard Disk Module.......................................................................................... 55
Chapter 3
System Architecture Overview
..................................................................... 57
JUNOSg Internet Software Overview..................................................................... 57
Routing Engine Software Components .......................................................... 58
Routing Protocol Process........................................................................ 58
Routing Protocols............................................................................ 58
Routing and Forwarding Tables ...................................................... 59
Routing Policy ................................................................................ 59
Interface Process.................................................................................... 60
SNMP and MIB II Processes.................................................................... 60
Management Process .............................................................................60
Routing Engine Kernel ........................................................................... 60
Tools for Accessing and Controlling the Software .......................................... 61
Software Monitoring Tools.............................................................................61
Software Installation and Upgrade Procedures .............................................. 61
Data Path Processing ............................................................................................ 62
Downstream Data Path ................................................................................. 62
Upstream Data Path ...................................................................................... 63