cBR-8 - Implementing Cisco’s Converged Cable Access Platform (cBR-8)

cBR-8 is the next generation in Cisco’s series of CMTS (Cable Modem Termination System) platforms. Cisco’s uBR 10K (Universal Broadband Router) previously offered industry-leading CMTS functionality – the cBR-8 is now Cisco’s flagship CMTS offering. The Cisco cBR-8 CCAP (Converged Cable Access Platform) CMTS provides many technology advancements and performance enhancements, while reducing the overall cost per subscriber. These advanced capabilities include: four times the capacity (number of cable modems/subscribers per CMTS) at double the speed of currently available DOCSIS 3.0 solutions (10K). The cBR-8 provides maximum flexibility for the future adoption of innovative network architectures including Remote PHY (RPHY), SDN, and Virtual CMTS (vCMTS). The cBR-8’s native support of DOCSIS 3.1 allows cable operators to deliver ultra-broadband services with maximum downstream speeds approaching 10 Gbps per subscriber and 1 Gbps upstream. Note: Cisco 10K supports all versions up to DOCSIS 3.0. cBR-8 supports up to 3.1.

Student Testimonials

Instructor did a great job, from experience this subject can be a bit dry to teach but he was able to keep it very engaging and made it much easier to focus. Student
Excellent presentation skills, subject matter knowledge, and command of the environment. Student
Instructor was outstanding. Knowledgeable, presented well, and class timing was perfect. Student

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Following are the strongly recommended prerequisites for this cable training course:
Students should have foundational knowledge and/or experience with –
  • DOCSIS principles of operation
  • Cisco IOS Command Line Interface (CLI)

Detailed Class Syllabus


DOCSIS Characteristics
Available Spectrum
TDM/TDMA/ATDMA/SCDMA and Channel types

cBR-8 Architecture and Hardware Overview

Hardware Overview
Chassis Installation
System Level Troubleshooting
Lab – Discovery

Software Overview and MAC Domain Configuration

cBR-8 Differences (versus uBR 10K)
Software and Configuration
Lab – Bringing up a MAC Domain
1:2 Combining
Lab – 1 by 2 Combining

Bonding and Bonding Resiliency

Downstream Resiliency
Upstream Resiliency
Lab – Wideband Resiliency
Battery Backup

Security Features

Dynamic Shared Secret (DMIC)
Cable Source Verify
Cable ARP Filtering
BPI+ Policy Enforcement
Privacy Hotlist

DOCSIS Load Balancing

Basic DOCSIS Load Balancing CLI
Advanced DOCSIS Load Balancing Configuration
Verification and Troubleshooting
Lab – DOCSIS Load Balancing
Additional Load Balancing Features

cBR-8 Features

cBR-8 Call Home
Smart Licensing
High Availability for Supervisor and Line Card
cBR-8 Patching – Sub-Package Mode
cBR-8 CPU Protection
Punt Path Rate Limiting (PPRL)

DOCSIS 3.1 Architecture

Greenfield Reference Architecture
Physical Layer Properties
PHY Link Channel (PLC)
Modulation Characteristics
MAC and DOCSIS Upper Layers
MAC Protocol Operation
Cable Modem Registration (DOCSIS 3.1)

DOCSIS 3.1 Configuration

DOCSIS 3.1 Downstream
DOCSIS 3.1 Downstream Configuration
Downstream Verification
Lab – Configuring DOCSIS 3.1 Downstream
DOCSIS 3.1 Upstream
DOCSIS 3.1 Upstream Configuration
Upstream Verification
Lab – Configuring DOCSIS 3.1 Upstream

cBR-8 Modem Troubleshooting

Modem Registration flowchart
Cable modem MAC states
Modems failing registration or BPI+
Modems not coming up in wideband mode
General modem-focused troubleshooting
Lab – Troubleshooting

Remote PHY Overview

The Evolution of PHY
Remote PHY Architecture
Basic Configuration
Deployment Options
Lab – Configuring Remote