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Hardware Component Overview
DOCSIS Module
35
Modem Management
The DOCSIS Module exercises functional management over MAC layer and cable modem
processes.
MAC Layer Scheduling
Management at the MAC layer includes the following scheduling functions:
!
Queueing upstream requests.
!
Transmission opportunity allocation based on MAC messages from cable modems.
!
QoS scheduling requirements, including congestion control, which have priority over
normal service flows.
!
Prioritizing service flows for least delay.
!
Maintenance opportunity allocation, including initial maintenance alignment.
Cable Modem Management
The DOCSIS Module performs the following cable modem management functions:
!
Registration of cable modems by service identifier (SID) assignments, and recording
time and address failures.
!
Ranging by adjusting timing offset, transmit power, carrier frequency, and transmit
equalizer taps.
Enhanced Routing and Bridging Features
The DOCSIS Module provides the following enhanced routing and bridging features that
provide additional value to MSOs:
!
Simultaneous IP routing (Layer 3) and IEEE 802.1 bridging (Layer 2).
!
ARP proxy.
!
Address authentication for ARP and IP packets.
!
802.1Q and stacked 802.1Q VLANs.
!
Security and service class assignment to multicast service flows.
!
IGMP packet snooping.
See the
JUNOSg Software Configuration Guide: Getting Started and System Management
and the
JUNOSg Software Configuration Guide: Interfaces, Cable, Policy, and Routing and Routing
Protocols
for more information on these and other DOCSIS Module features.
Summary of Contents for G10 CMTS
Page 8: ... JUNOSg 3 0 G10 CMTS Hardware Guide viii ...
Page 18: ... JUNOSg 3 0 G10 CMTS Hardware Guide 2 ...
Page 34: ...G10 CMTS Hardware Overview JUNOSg 3 0 G10 CMTS Hardware Guide 18 ...
Page 82: ... JUNOSg 3 0 G10 CMTS Hardware Guide 66 ...
Page 112: ...Rack Mounting JUNOSg 3 0 G10 CMTS Hardware Guide 96 Figure 25 Air Flow Through Chassis ...
Page 148: ... JUNOSg 3 0 G10 CMTS Hardware Guide 132 ...
Page 156: ...Upstream RF Measurement JUNOSg 3 0 G10 CMTS Hardware Guide 140 ...
Page 188: ... JUNOSg 3 0 G10 CMTS Hardware Guide 172 ...
Page 196: ...Radio Frequency RF Specifications JUNOSg 3 0 G10 CMTS Hardware Guide 180 ...
Page 202: ...EIA Channel Plans JUNOSg 3 0 G10 CMTS Hardware Guide 186 ...
Page 203: ... 187 Part 5 Index Index on page 189 ...
Page 204: ... JUNOSg 3 0 G10 CMTS Hardware Guide 188 ...
Page 210: ... Index JUNOSg 3 0 G10 CMTS Hardware Guide 194 ...