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3-Day Hands-On Course
Course Description
In this course, students will be introduced to the concepts, processes, and techniques needed to understand the DOCSIS 3.0 specification from the perspective of troubleshooting end devices (cable modems), head-end equipment (Cisco ubr10k and CMTS), and advanced services possible using DOCSIS 3.0 (such as connectivity for 50 and 100 Mbps downstream service). Students will also be given detailed troubleshooting scenarios.
Course Objectives
What you will learn:
- High level description of a CATV transmission system
- Description of analog and digital signals: What is QAM, What a QAM constellation represents, How to calculate raw data rates, Identifying good and bad QAM constellations
- Detailed description of the boot up and registration process of the legacy DOCSIS 1.1 /2.0 cable modems.
- RF issues from a QAM analyzer, to set a baseline understanding what current troubleshooting looks like and be prepared for detailed troubleshooting on DOCSIS 1.1 through DOCSIS 3.0
- Identify multiple service flows to a cable modem. Identify dynamic vs. static service flows. Be able to explain the upstream scheduling types.
- Identify multiple upstream modulation types and explain the additional QAM rates (16/64) and the speeds associated with these new rates. These are features introduced in DOCSIS 2.0
- Identify DOCSIS 3.0 specs and the functional areas that they cover
- Identify how various DOCSIS 3.0 specs map into a DOCSIS 3.0 system, including existing DOCSIS 1.x / 2.0 capabilities.
- Distinguish between M-CMTS and I-CMTS architectures and describe the relationship between the M-CMTS and DOCSIS 3.0 standards
- Define code trains applicable to the Cisco uBR10012 and explain Cisco uBR10012 software-release naming convention
- Describe valid hardware combinations for: Cisco uBR10012 downstream channel bonding deployment, connectivity for 25, 50, and 100 Mbps service, Cisco uBR10012 upstream channel bonding deployments, connectivity for 2/5, and 10 Mbps service using DOCSIS 2.0 and DOCSIS 3.0 upstream bonding, and connectivity for various penetration rates.
- Configure an uBR10012 as a modular-CMTS for downstream channel bonding, for greater bandwidth per subscriber, for channel bonding across a larger footprint, for upstream channel bonding with the primary channel configured with DOCSIS 2.0 parameters.
- Explain uBR10012 DSCB with Wideband Resiliency
- Troubleshooting issues with a DOCSIS 3.0 solution.
- Understand the DOCSIS 3.0 capabilities of the mc20x20v line card, the uBR7225 and the uBR7246vxr with mc8x8 card.
Intended Audience
Cable Operator Field Service Technicians, Network Operation Center / Customer Support Engineers, Head-end Engineers responsible for troubleshooting DOCSIS 3.0 implementation in the field or on head-end equipment such as the Cisco ubr10k.
Prerequisites
The following are prerequisites for this
course:
- Basic understanding of cable head-end operations
Course Outline
The course outline is as follows:
CATV Overview
- History of CATV
- Channel Plan
- Insertion of Data
DOCSIS RF Overview
- Analog vs. Digital Signals
- What a QAM signal represents
- Troubleshooting QAM signals
Legacy Cable Modem Initialization / Registration
- How a cable modem initializes and boots up
Troubleshooting RF Issues
- Identifying RF issues using a QAM analyzer
DOCSIS 1.1 Overview
- DOCSIS Service Flows
- Dynamic Service Adds / Deletes / Changes
- Upstream Scheduling types
DOCSIS 3.0 Specifications Overview
- PHY Layer
MAC and Upper Layer
- OSS
- Security
- CM to CPE Interface
DOCSIS 3.0 Theory of Operation
- 3.0 PHY-Layer Spec
- Frequency Plan
- Compatibility with other services
- Fault isolation
- Cable system terminal devices
- RF Channels
- Physical Medium Dependent Sublayer
- MAC and Higher Layer Specs
- Interface Specification
- DOCSIS 3.0 MULPI Key Features
- MAC Operation
- Multicast Operation
- Network and Higher Layer Protocols
- CM and CMP Provisioning and Management
- Relationship to Physical HCF Plant and topology
- Cable Modem Service Group (CM-SG)
- CMTS Downstream Service Model
- MAC Specifications
- MAC Formats
- Time Sync
- Upstream features
- Dynamic Service Features
- Dynamic Bonding
- MAC Protocol Operation
- Quality of Service
- Channel Bonding
- Data Forwarding
- Dynamic Bonding and Load Balancing
Modular CMTS and Integrated CMTS
- M-CMTS
- I-CMTS
- Spec Relationships
- Cisco uBR10012 channel bonding
CMTS Software Release-Naming Conventions
- 12.3BC software
- 12.2S software
- Naming of code in development
Cisco uBR10012 DOCSIS 3.0 Hardware
- SIP/SPA
- Saratoga and Spumoni SIP
- Modena SPA
- PRE-2 and PRE-4
- HHGE, 5x1GE, and 10GE
- DTI Server
- EQAM
- CMTS Line Cards
uBR10012 Downstream Channel Bonding IOS Commands and CLI
- Cable Interface Definitions pre/post DOCSIS 3.0
- Channel Bonding CLI
- Node CLI
- MAC Domain Descriptor (MDD)
- Primary Channel Selection
- HA Support
- Show Commands
- Dynamic Bandwidth Sharing Example
Important Features and Featurettes in 12.2(33)SCB
Troubleshooting
- Troubleshooting
- Know your network
- How is it supposed to work?
- What are the symptoms?
- Divide and conquer
- Show Commands – what information can you obtain?
Other DOCSIS 3.0 Alternate Configurations / Hardware.
- mc20x20 line card
- uBR7225 and 7246vxr
- Other
Course Labs
- Lab 1: Downstream Channel Bonding Lab 1
- Lab 2: Downstream Channel Bonding Lab 2
- Lab 3: Troubleshooting Lab
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