Troubleshooting DOCSIS 3.0

1. Troubleshooting DOCSIS 3.0

2. Agenda • DOCSIS 3.0 - Why? • DOCSIS 3.0 - Features • System Considerations • Troubleshooting Process

3. DOCSIS 3.0 – Why? • Move from Broadcast to On-demand distribution model • Personalized Video Services • “We want to watch what we want, when we want it.” • More SD and HD video services • New Internet Services • Web 2.0 • Video Streaming • Increase in home usage • More Business to Business Services • Increase in home base businesses • $ $ $ $ $ $

4. DOCSIS 3.0 Features • Channel Bonding • Up to 10 channels • Higher Throughput • Expanded Upstream Freq. Range • 5-85 MHz • S-CDMA active code selection • Enhanced Provisioning • IPv6 for CM’s and CPE’s • Business Services • T1 Circuit Emulation support • Enhanced Security features • Enhanced Network management tools

5. System Requirements • Headend • DOCSIS 3.0 Enabled M-CMTS or CMTS • Possible change in DHCP & other servers to support IPv6 • Back-Office changes to support new management tools • Increase Node segmentation • System • Need Downstream bandwidth for additional DOCSIS Channels • 4 bonded channels (24 MHz) = 160 Mbps • Spec supports max = 10 Channels • Need Upstream bandwidth for additional DOCSIS Channels • 4 bonded channels (24 MHz) = 120 Mbps • Customer Premise • Subscriber equipment upgrade • General • Education

6. Test Procedure:Identify, Determine, Analyze, Prioritize, Resolve, Evaluate • Identify the problem • What is the complaint? • Are there other complaints in the same area? • Determine Potential Causes • Use Network Management & Monitoring Tools • Truck Roll • Analyze where problem causes could exist • Prioritize potential solutions • Resolve the problems • Evaluate your results

7. DOCSIS 3.0 Complaint Indentify • Questions • Is it one customer or many? • Are there any other alarms in the area? In the System? • What is the capacity level in the area? • Signal quality from modem • Management Tools • Modem Diagnostic tools • Ingress Monitoring System • Other

8. Truck Roll • Check all Downstream DOCSIS Channels first • Levels are number one • MER/BER Measurements • EQ & Freq. Response measurements if group delay or return loss problem is suspected

9. Levels • Check all levels • Min test key channels • Must check all DS DOCSIS channels

10. DOCSIS Levels • Bonded channels may not be adjacent • Typical 3 or 4 ch’s today (10 max) • Look for inconsistencies

11. MER/BER Measurements • Check MER & BER on all DS DOCSIS Ch’s

12. EQ, Freq. Response & Group Delay • Check Freq. Response & Group delay if return loss problem is suspected

13. Cable Modem Test • Select Downstream Channel from List • Enabled in Network / Cable Modem Setup

14. Cable Modem Connect • Range & Register Progress shown

15. Cable Modem Connect • Select UCD • Enabled in Network / Cable Modem Setup

16. Cable Modem Connect • Errors are displayed in Range & Register Process

17. Cable Modem Connect • Completed Range & Register Process • Modem On-line • Win CE Emulator IP • MTA IP

18. Cable Modem Detail • Detail Cable Modem Screen • Downstream Detail • Upstream Detail

19. DOCSIS 3.0 Bonded Channels • Primary DS DOCSIS Ch. carries overhead • Secondary DS Ch. carries just data • DOCSIS 2.0 test Checks Primary Channel • Upstream configured with UCD on all Upstreams • Check performance of all US Channels independently • NOC Test Tools • Bonded US Channels must be check using NOC test tools • DS Channel synchronization • US Channel synchronization

20. CM acquires QAM/FEC lock of DOCSIS DS channel SYNC, UCD, MAP messages CM performs usual US channel selection, but does not start initial ranging MDD message CM performs bonded service group selection, and indicates via initial ranging B-INIT-RNG-REQ message CM transitions to ranging station maintenance as usual Usual DOCSIS initial ranging sequence DHCP DISCOVER packet DHCP OFFER packet DHCP REQUEST packet DHCP RESPONSE packet TOD Request/Response messages TFTP Request/Response messages CM provides Rx-Chan(s)-Prof REG-REQ message REG-RSP message CM receives Rx-Chan(s)-Config CM confirms all Rx Channels REG-ACK message BPI initialization, if configured DOCSIS 3.0 Registration Diagram DOCSIS 3.0 differences compared to other versions

21. Cable Modem Test Cont. • Perform Modem test for all DS Ch’s • Will not include Secondary Bonded Channels • All US Ch’s • Will only include Ch’s with UCD’s • Look at node ingress monitor • NOC Network Management tools can give you the rest of the info

22. Test Procedure:Identify, Determine, Analyze, Prioritize, Resolve, Evaluate • Identify the problem • What is the complaint? • Are there other complaints in the same area? • Determine Potential Causes • Use Network Management & Monitoring Tools • Analyze where problem causes could exist • Think before you run • Prioritize potential solutions • What is the most likely cause? • Resolve the problems • Evaluate your results • Did this solve the problem, or is something else broken?

23. Summary • Field point of view; • It is the same RF network • System point of view: • It is more complex • Use good troubleshooting procedures • Network Management Tools can help identify the problem without a truck roll • Think before you roll a truck • Use familiar DS tests to measure DS performance • Use current modem & US test methods to check US performance

24. THANK YOU From Jerry Green Sunrise Telecom, Inc.