Cadant C4 CMTS User Documentation (Release 4.2 Standard)

Cadant C4 CMTSCable Modem Termination System

C4 CMTS User Documentation

Documentation Set Release 4.2, Standard July 2005

ARRIS PROPRIETARY This document contains proprietary information of ARRIS, Inc. and is not to be disclosed or used except in accordance with applicable agreements. 2005 ARRIS All Rights Reserved 07/05/05

Copyright and Trademark InformationCadant C4 G2 IMS FlexCAM ARRIS and Arris International are trademarks of ARRIS International, Inc. Cadant C4 CMTS is a registered trademark of ARRIS International, Inc. All other trademarks and registered trademarks are the property of their respective holders. Every attempt has been made to capitalize and spell correctly the trademarked and service marked terms used in this manual. ARRIS does not attest to the accuracy of these terms and their usage. Any misspelling or misuse of a term should not be construed as affecting the validity of its trademark or service mark. All information contained in this document is subject to change without notice. ARRIS reserves the right to make changes to equipment design or program components, as progress in engineering, manufacturing methods, or other circumstances may warrant. The G2 IMS product contains copyright material licensed from AdventNet, Inc. http://www.adventnet.com. All rights to such copyrighted material rest with AdventNet. The ARRIS Cadant C4 Cable Modem Termination System (CMTS) has been qualified by CableLabs for DOCSIS1.1 and by tComLabs for Euro-DOCSIS 1.1. In June, 2004, CableLabs announced that the C4 CMTS qualified for DOCSIS 2.0. PacketCable is a trademark of Cable Television Laboratories, Inc. Broadcom is a registered trademark of the Broadcom Corporation, http://broadcom.com.

Patent InformationThe ARRIS Cadant C4 Cable Modem Termination System (CMTS) is protected by U.S. and international patents including: 6,457,978 6,662,368 6,449,249 6,636,482 6,637,033 Additional ARRIS International, Inc. patents pending: 6,457,978; 6,769,132; 6,662,368; 6449,249; 6,636,482; 6,637,033; 6,898,182;

2005 ARRIS All rights reserved.

CADANT C4 CMTS LIMITED WARRANTY1. SOFTWARE WARRANTY ARRlS International, Inc. ("ARRIS") Warrants that for a period of ninety (90) days from delivery of the Software (the "Software Warranty Period), the Software will perform in substantial conformance with the technical specifications for such Software set forth in the Documentation. Purchaser's sole and exclusive remedy, and ARRIS's sole and exclusive liability under this Section I (Software Warranty) shall be, at ARRIS's option: (i) to use commercially reasonable efforts to correct any reproducible errors identified by Purchaser in writing during the Software Warranty Period which renders the Software non-conforming, (ii) to replace the Software with functionally equivalent Software or (iii) to accept return of the Software from Purchaser, if applicable. ARRlS makes no warranty that the Software will work in combination with any hardware or application software products provided by third parties, that the operation of the Software will be uninterrupted or error free, or that all defects in the Software can be corrected. ARRIS shall not have any obligation or liability with respect to this Section I (Software Warranty) for any errors or any defects in the Software upon expiration of the Software Warranty Period. 2. HARDWARE WARRANTY ARRIS warrants to Purchaser that under normal use and service, for a period of twelve (12) months from the purchase date of the Hardware (the "Hardware Warranty Period"), such Hardware will be free from defects in materials and workmanship. Purchaser's sole and exclusive remedy and ARRIS's sole and exclusive liability under this Section 2 (Hardware Warranty) shall be, at ARRIS's option: (i) to use commercially reasonable efforts to correct any reproducible Hardware errors identified by Purchaser in writing during the Hardware Warranty Period which renders the Hardware non-conforming, (ii) to replace the Hardware or (iii) accept return of the Hardware from Purchaser. ARRIS shall not be responsible for any of Purchaser's or third party software, firmware, information or memory data contained in, stored on, or integrated with any Hardware Products returned to ARRIS pursuant to any Warranty provided under this Agreement. 3. OBTAINING WARRANTY SERVICE To make a return under the Warranty above, the Purchaser must notify the ARRIS in writing by obtaining an ARRIS Return Material Authorization number (RMA) within the relevant Warranty Period. The authorized RMA number the Purchaser receives from ARRIS must be marked on the outside package and sent prepaid and packaged appropriately for safe shipment. ARRIS will use commercially reasonable efforts to ship any repaired or replaced Product will be shipped to Purchaser, at ARRIS' expense, not later than thirty (30) days after ARRIS receives the defective Product. Any repaired or replaced Hardware or Software shall be warranted for the remainder of the unexpired applicable Warranty Period. Notwithstanding the above, if any return is due to errors or defects for which ARRIS is not responsible or otherwise not covered by the Warranty, Purchaser shall be liable for and reimburse ARRIS for shipping and related expenses. 4. DISCLAIMER OF WARRANTY. EXCEPT AS MAY BE AGREED TO IN A SEPARATE WRITING BETWEEN THE PARTIES, THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES WITH RESPECT TO HARDWARE OR SOFTWARE DELIVERED TO PURCHASER HEREUNDER, WHETHER STATUTORY, BY OPERATION OF LAW, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON- INFRINGEMENT, TITLE AND ANY WARRANTIES ARISING OUT OF USAGE OR TRADE. THIS WARRANTY IS APPLICABLE SOLELY TO PURCHASER NAMED IN THE PREAMBLE HERETO AND NOT TO ANY SUCCESSOR IN INTEREST THEREOF OR ANY OTHER THIRD PARTY ON THE DATE HEREOF. NO WAIVER, ALTERATION, OR MODIFICATION OF THIS WARRANTY SHALL BE BINDING AGAINST THE ARRIS UNLESS IN WRITING AS A SEPARATE AMENDMENT HERETO AND SIGNED BY TWO (2) AUTHORIZED EXECUTIVE OFFICERS OF ARRIS. 2005 ARRIS All rights reserved.

5. WARRANTY LIMITATIONS. ARRIS shall be relieved of all obligations and liability under the Warranty provisions set forth herein, if: a The Hardware or Software is operated with, or the error or defect is due to, any accessory, equipment, software or part not approved by ARRIS; b The Hardware or Software shall not have been installed, operated and maintained in accordance with ARRlS's instructions and Documentation; c The Hardware or Software has been repaired, altered or modified by someone other than ARRlS; d Purchaser does not notify ARRlS in writing of the error or defect within the applicable Warranty Period with sufficient information for ARRIS to identify and reproduce such error or defect or fails to return the defective Hardware or Software in accordance with the terms of this Agreement; or e ARRIS can demonstrate that the alleged error or defect in the Software or Hardware does not exist or was caused by Purchaser's or any third party's misuse, neglect, improper installation or testing, or negligent repair or any other cause beyond the range of the intended use, or by accident, fire, lightening or other hazard or act of God. THE LIMITED WARRANTY, LIMITED REMEDIES, WARRANTY DISCLAIMER AND LIMITED LIABILITY ARE FUNDAMENTAL ELEMENTS OF THE BASIS OF THE BARGAIN BETWEEN ARRIS AND CUSTOMER. ARRIS WOULD NOT BE ABLE TO PROVIDE THE PRODUCT WITHOUT SUCH LIMITATIONS.

Cadant C4 CMTS - Software License AgreementEXCEPT AS SET FORTH IN THE WRITTEN SIGNED AGREEMENT ENTERED INTO BY ARRIS INTERNATIONAL, INC. ("ARRIS") AND PURCHASER ("PURCHASER"), USE OF THE SOFTWARE PROVIDED BY ARRIS IS SUBJECT TO THE FOLLOWING TERMS ("License Agreement"). IF PURCHASER DOES NOT AGREE TO BE BOUND BY THE TERMS OF THIS LICENSE AGREEMENT, RETURN THE SOFTWARE AND ALL ENCLOSED DOCUMENTS OR MATERIALS TO ARRIS INTERNATIONAL, INC. FOR A FULL REFUND. USE OF THE SOFTWARE CONSTITUTES ACCEPTANCE OF THE TERMS HEREOF. 1. LICENSE TERMS Subject to the terms of this License Agreement, ARRIS International, Inc. (ARRIS) grants to Purchaser a perpetual, royalty-free, non-exclusive, non-transferable (except as set forth in Section 9.2) non-sub-licensable right and license to use the Cadant C4 CMTS Software (the Software) in connection with the Cadant family of products (the System), in binary object code form only. Purchaser may use any third party software products or modules supplied by ARRIS solely with the Software, unless the licensing terms of the third party software products or modules specify otherwise. Purchaser may not disclose the results of Software performance benchmarks to any third party without ARRIS' prior written consent. Purchasers are forbidden from offering the Software for resale under the terms of this Section. All rights not specifically granted to Purchaser herein are retained by ARRIS. 2. RESTRICTIONS Purchaser shall not, and shall not authorize any third party to; (i) make any copies of the Software, (ii) modify, decompile, disassemble, reverse engineer or otherwise attempt to derive any source code from the Software; (iii) transfer the Software to any third party without the prior written consent of ARRIS; (iv) export the Software or any of its underlying technology in contravention of applicable US and foreign export laws and regulations or (v) use the Software other than in connection with the System.


3. USE The right to use the Software, or any individual feature thereof, may be restricted by a measure of usage of applications based upon the number of devices, subscribers, or some similar measure. An expansion beyond a commercially reasonable usage level may require payment of an additional fee to ARRIS. 4. LIMITATIONS ON LIABILITY NEITHER ARRIS NOR ITS LICENSORS SHALL BE LIABLE FOR ANY INDIRECT, INCIDENTAL, PUNITIVE, CONSEQUENTIAL, EXEMPLARY OR SPECIAL DAMAGES UNDER ANY THEORY OF LIABILITY, WHETHER ALLEGED AS A BREACH OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE AND REGARDLESS OF WHETHER SUCH DAMAGES ARE SUFFERED BY PURCHASER OR ANY OTHER USER OF THE SOFTWARE, OR ANY THIRD PARTY, EVEN IF ARRIS AND/OR ITS LICENSORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT WILL ARRIS SYSTEM'S TOTAL LIABILITY TO PURCHASER ARISING OUT OF OR PURSUANT TO THIS LICENSE AGREEMENT EXCEED THE AMOUNT PAID BY PURCHASER TO ARRIS FOR THE SOFTWARE. 5. TERM & TERMINATION. This License Agreement will take effect upon Purchaser acceptance of the terms hereof or upon Purchaser first use of the Software and will remain in force until terminated in accordance with this License Agreement. This License Agreement may be terminated by Purchaser at any time effective upon receipt by ARRIS of written notice thereof. ARRIS may terminate this License Agreement upon fifteen (15) days prior written notice based on Purchaser material breach of this License Agreement if such breach is not cured within such fifteen (15) day period. Notwithstanding the foregoing, this License Agreement shall terminate immediately upon Purchaser breach of any of the provisions of Section 2 above. 6. OWNERSHIP. Title, ownership rights, and all intellectual property rights in and to the Software and any accompanying materials or documentation, and any copy of the foregoing, shall remain the sole and exclusive property of ARRIS and/or its licensors. Purchaser agrees to abide by the copyright law and all other applicable laws of the United States. Purchaser acknowledges that the Software contains valuable confidential information and trade secrets of ARRIS and/or its licensors. 7. INDEMNIFICATION. Purchaser agrees to defend, indemnify and hold ARRIS harmless from and against any costs, losses, liabilities and expenses (including reasonable attorney's fees) arising out of or relating to (i) third party claims arising out of or related to Purchaser use of the Software in contravention to the terms of this Agreement, including without limitation, any and all claims, actions, suits, or proceedings alleging, fraud, breach of security, non-compliance with laws, breach of contract or negligence. 8. UNITED STATES GOVERNMENT RIGHTS. The Software provided under this License Agreement is commercial computer software developed exclusively at private expense, and in all respects are proprietary data belonging solely to ARRIS and/or it licensors. 9. MISCELLANEOUS. 9.1 If any term, condition, or provision in this License Agreement is found to be invalid, unlawful or unenforceable to any extent, the remaining terms, conditions and provisions will continue to be valid and enforceable to the fullest extent permitted by law. 9.2 Neither this License Agreement nor any rights under this License Agreement may be assigned or otherwise transferred by Purchaser, in whole or in part, whether voluntary or by operation of law without the prior written consent of ARRIS. Subject to the foregoing, this License Agreement


will be binding upon and will inure to the benefit of the parties and their respective successors and assigns. 9.3 This License Agreement (including any addenda hereto signed by both parties) represents the entire agreement of the parties with respect to the subject matter of this License Agreement and supersedes all previous communications, representations, understandings and agreements, either oral or written, between the parties with respect to said subject matter. 9.4 This License Agreement may not be amended, except in writing, signed by both parties. No terms, provisions or conditions of any purchase order, acknowledgment or other business form that Purchaser may use in connection with the acquisition or licensing of the Software will have any effect on the rights, duties or obligations of the parties under, or otherwise modify, this License Agreement, regardless of any failure of ARRIS to object to such terms, provisions or conditions. 9.5 This License Agreement shall be governed by and construed in accordance with the laws of the State of Georgia. Any suit brought in connection with this Agreement shall be subject to the exclusive jurisdiction of the State Court of Georgia or the Federal Courts for the Northern District of Georgia and Purchaser hereby agree and submit to the personal jurisdiction and venue thereof.


Table of Contents

1

About This ManualIntended Audience Prerequisite Skill and Knowledge Purpose Conventions Used in this Document Admonishments Textual Conventions How to Contact Us 1-1 1-2 1-2 1-2 1-2 1-3 1-4

2

C4 CMTS FeaturesDOCSIS 2.0 Compliance Fault Detection and Recovery Interfaces and Protocols Security Features IP Filtering Options C4 CMTS Feature Descriptions by Software Release Feature Descriptions 2-1 2-2 2-3 2-3 2-3 2-4 2-8

3

C4 CMTS SpecificationsNetwork Diagram C4 CMTS Specifications RF Electrical Specifications Maximum Density Scalability 3-3 3-4 3-6 3-7 3-7

Release 4.2, Standard

ARRIS PROPRIETARY All Rights Reserved

1

Table of Contents

C4 CMTS

VoIP Call Capacities

3-8

4

C4 CMTS Power RequirementsComponents of the Power System Power Protection Description 4-1 4-3

5

Installation RequirementsSafety Precautions Lifting Safety Electrical Equipment Guidelines Electrostatic Discharge (ESD) Preventing Electrostatic Discharge Damage Installation Checklist Tools Required Items Not Supplied Unpacking the C4 CMTS Module Protection Installation Considerations Rack Mounting Chassis Placement Power Requirements Cooling Requirements 5-2 5-2 5-3 5-3 5-3 5-4 5-4 5-5 5-6 5-7 5-7 5-7 5-7 5-8 5-8

6

Installing Modules and System Bring-upIntroduction Main Hardware Components Module Types and Chassis SlotsFront View Chassis Rear View Recommended Order for Installing Chassis Components Recommended Chassis Unloading Order Grounding the Chassis Rack Mounting the C4 CMTS Power Conditioning Module (PCM) and Cabling 6-2 6-2 6-3 6-4 6-6 6-7 6-7 6-8 6-9

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Table of Contents

Power Protection Description Fan Modules and Cooling Air Filter Installing Modules in the C4 CMTS System Control Module (SCM) Fabric Control Module (FCM) Overview Fast Ethernet Network Access Module (NAM) Overview Gigabit Ethernet Network Access Module Overview Cable Access Module (1Dx8U CAM) Overview Cable Access Module (2Dx12U CAM) Overview Initial System Configuration Overview How to Set the SCM IP Address Using a Terminal Emulator

6-10 6-12 6-17 6-17 6-21 6-28 6-29 6-31 6-32 6-34 6-35 6-41 6-42 6-46 6-47 6-51 6-51 6-52

7 8

Clock Synchronization Protocol Host Names, User IDs, and Password RecoveryHow to Administer the Host Name and User IDs How to Add and Delete Users Password Recovery 8-1 8-2 8-4

9

NAM ConfigurationFast Ethernet Network Access Module (NAM) Configuration Gigabit Ethernet Network Access Module (GigE NAM) Configuration NAM-Side IP Interface Bundling 9-2 9-4 9-7

10

Basic CAM Configuration1Dx8U CAM 10-2



3

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C4 CMTS

2Dx12U CAM Rules and Restrictions for 2Dx12U CAM Configuration Basic Command Set for Bringing Up a 2Dx12U Migration from 1Dx8U CAMs to 2Dx12U CAMs Measuring SNR in the 2Dx12U CAM Clone Group Configuration Clone Group Configuration Recommendations Clone Group Operation Details Sample Clone Group Configurations Inter-MAC-Domain Clone Groups Modulation Profiles Adjusting Channel Settings in Response to Increased CM Scaling FlexCAM Hitless CAM Sparing Overview Configure Sparing Groups Example Interface Bundling

10-4 10-4 10-7 10-13 10-23 10-27 10-28 10-29 10-30 10-31 10-32 10-40 10-41 10-41 10-43 10-47

11 12

Control Complex Redundancy Configuring Router FunctionalityInterface Configuration Common Interface Configuring Commands Monitoring Interfaces Subinterfaces (Multiple VRIs per VRF) Routing Information Protocol, version 2 (RIP2) Open Shortest Path First (OSPF) OSPF Graceful Restart Loopback Interfaces for Routing Protocols Dynamic Route Redundancy Configuring IP Routes Route Redistribution Multicast Operations in the C4 CMTS IGMP Implementation 12-1 12-1 12-3 12-5 12-9 12-15 12-19 12-21 12-25 12-26 12-27 12-28 12-30

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Table of Contents

13

IP Packet Filtering, Throttling, and CAROverview of IP Packet Filtering Subscriber Filters Setting Default Filter Groups Debug IP Packet Capture Packet Throttling Committed Access Rate Global Rate Smoothing for TCP Traffic Feature 13-2 13-5 13-10 13-15 13-17 13-19 13-23

14 15

Service Class Names Authentication, Authorization, and Accounting (AAA)AAA Feature Servers and Server Groups Secure Shell Protocol (SSH2) In-Band Management with ACLs Routing to a Null Interface Source Verification of Cable-side IP Addresses Upstream Load Balancing (ULB) DSx DQoS VoIP on the C4 CMTS C4 CMTS Advanced CM Configuration File Verification 15-2 15-5 15-14 15-22 15-24 15-25 15-27 15-29 15-31

16

PacketCable ServicesPacketCable 1.x Overview PacketCable Multimedia Overview Configuration Procedures IKE and IPSec Configuration PacketCable Settings PC1.x Electronic Surveillance Electronic Surveillance Configuration Electronic Surveillance Logging Messages Running in a non-PacketCable Compliant Voice Environment 16-1 16-5 16-9 16-10 16-21 16-32 16-33 16-34 16-35



5

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C4 CMTS

Working with non-ARRIS MTAs in a non-PacketCable Compliant Voice System Working with ARRIS MTAs in a non-PC1.x Compliant System Converged Services

16-35 16-36 16-38

17

Baseline Privacy Interface (BPI)Baseline Privacy Overview Baseline Privacy Operational Overview Baseline Privacy Setup Initial CMTS Base Table Setup BPI Initialized State Configuration Settings. Encrypted Multicast Setup Digital Certificates (BPI+ Only) Provisioning BPI X.509 Certificates Using Import/Export Commands Provisioning BPI X.509 Certificates Using CLI Commands Baseline Privacy Debugging Explanation of BPI Trap Codes CLI Commands for Baseline Privacy Configure Cable Command Show Cable Command Configure Interface Cable Command Show Interface Cable Command 17-1 17-2 17-4 17-4 17-9 17-10 17-14 17-15 17-17 17-20 17-24 17-28 17-28 17-29 17-30 17-32

18

DOCSIS Set-top Gateway (DSG) ConfigurationOverview and Definitions Configuration Procedures Initial Configuration DSG Configuration Advanced DSG Configuration DS Cable Interface DSG Tunnel DSG Classifier DSG Configuration Scenarios Initial Setup for DSG 18-2 18-4 18-5 18-7 18-9 18-11 18-14 18-18 18-18 18-18

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DSG Configuration Only Multicast Destination IP to RFC1112 DSG Tunnel MAC Multicast Destination IP to non-RFC1112 DSG Tunnel MAC Unicast Destination IP

18-20 18-20 18-23 18-25

19 20

Downstream Cable Parameters Upstream Modulation Parameters and ProfilesDifferences Between the 1Dx8U and 2Dx12U Default Modulation Profiles Modulation Profiles: Default and User-defined 20-10 20-11

21 22

SNMP Configuration with CLI Flash Disk DescriptionOverview Virtual System Controller File System Administration File Transfers Hitless Reload/Upgrade Feature 22-1 22-4 22-5 22-7 22-9

23

Logging and the C4 CMTSEvent Messages How Event Messages Are Routed Event Management Subsystems Event Message Throttling Show Logging Commands Configuring Event Throttling Configuring Event Routing Generating Events and Traps SNMP Trap Examples Routing Events to Local Volatile and Non-Volatile Logs Displaying Events on the System Console Routing Events to the Monitor Routing Events to the History Log 23-1 23-2 23-3 23-4 23-5 23-9 23-11 23-15 23-16 23-17 23-18 23-19 23-20



7

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C4 CMTS

Logging OSPF Event Messages

23-21

24

DiagnosticsDiagnostic User Interfaces 24-2

25

CLI OverviewAccess Levels and Modes CLI Command Modes CLI Syntax Conventions Designating MAC addresses and IP addresses Keyboard Shortcuts CLI Command Features CLI Help Feature CLI Filtering How to Use CLI Filtering 25-2 25-2 25-5 25-6 25-6 25-7 25-8 25-15 25-15

26 27

CLI Command Descriptions Standard and Cadant Enterprise MIBsCMTS SNMP MIB Variable Descriptions Enterprise MIBs 27-2 27-3

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List of Features and Fixes for 4.2

Advanced CM Configuration File Verification (TFTP Enforce) Associate ACL with SNMP Community String CLI - clear crypto sa CLI - configure cable dsg client-id-list CLI - configure cable dsg tunnel CLI - configure cable dsg ds-frequency-list CLI - configure cable dsg timer-list CLI - configure cable dsg tunnel classifier CLI - configure cable dsg vsp-list CLI - configure cable filter group index log CLI - configure crypto dynamic-map

15-31 21-1 26-21 26-71 26-77 26-73 26-75 26-78 26-80 26-82 26-131

CLI - configure crypto dynamic-map ipsec-isakmp match address 26-132 CLI - configure crypto dynamic-map set peer 26-133

CLI - configure crypto dynamic-map set security-association lifetime 26-134 CLI - configure crypto dynamic-map set transform-set 26-135 CLI - configure crypto ipsec security-association lifetime seconds CLI - configure crypto ipsec transform-set CLI - configure crypto ipsec transform-set authentication CLI - configure crypto ipsec transform-set encryption CLI - configure crypto ipsec transform-set mode 26-145 26-137 26-138 26-139 26-140



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CLI - configure crypto isakmp enable CLI - configure crypto isakmp key CLI - configure crypto isakmp local-address CLI - configure crypto isakmp policy CLI - configure crypto key export CLI - configure crypto key generate CLI - configure crypto key import CLI - configure crypto key zeroize CLI - configure crypto map ipsec-isakmp CLI - configure crypto map ipsec-isakmp dynamic CLI - configure crypto map ipsec-isakmp match address CLI - configure crypto map ipsec-isakmp set peer

26-141 26-142 26-143 26-144 26-145 26-146 26-147 26-148 26-149 26-150 26-151 26-152

CLI - configure crypto map ipsec-isakmp set security-association lifetime seconds 26-153 CLI - configure crypto map ipsec-isakmp set transform-set CLI - configure interface cable / cable downstream dsg dcd-enable CLI - configure interface cable / cable downstream dsg ds-frequency-list CLI - configure interface cable / cable downstream dsg no CLI - configure interface cable / cable downstream dsg timer-list CLI - configure interface cable / cable downstream dsg vsp-list 26-154 26-176 26-178 26-179 26-180 26-183

CLI - configure interface cable / cable dynamic-secret 26-209 CLI - configure interface cable / cable tftp-enforce 26-231

CLI - configure interface fastethernet / ip access-group 26-319 CLI - configure interface gigabitethernet / ip access-group 26-363 CLI - configure ip filter group index log CLI - configure ip ssh ciphers CLI - configure ip ssh idle-timeout 26-424 26-433 26-434

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CLI - configure ip ssh login CLI - configure ip ssh max-auth-fail CLI - configure ip ssh password-auth CLI - configure ip ssh password-auth-req CLI - configure ip ssh port CLI - configure ip ssh port-forwarding CLI - configure ip ssh public-key-auth CLI - configure ip ssh public-key-auth-first CLI - configure ip ssh public-key-auth-req CLI - configure ip ssh restart CLI - configure ip ssh shutdown CLI - configure packetcable CLI - configure packetcable dqos shutdown CLI - configure packetcable dqos timer CLI - configure packetcable pcmm shutdown CLI - configure packetcable pcmm timer t1 CLI - configure packetcable throttle CLI - configure snmp-server community CLI - reload hitless CLI - show cable dsg CLI - show cable dsg client-id-list CLI - show cable dsg ds-frequency-list CLI - show cable dsg timer-list CLI - show cable dsg tunnel CLI - show cable dsg tunnel classifier CLI - show cable dsg tunnel-group CLI - show cable dsg vsp-list CLI - show crypto dynamic-map [tag ] CLI - show crypto ipsec sa

26-435 26-436 26-437 26-438 26-439 26-440 26-441 26-442 26-443 26-444 26-445 26-480 26-481 26-482 26-489 26-490 26-491 26-553 26-620 26-642 26-646 26-648 26-650 26-653 26-654 26-652 26-655 26-727 26-728



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CLI - show crypto ipsec security-association lifetime CLI - show crypto ipsec transform-set [tag ] CLI - show crypto isakmp CLI - show crypto isakmp policy CLI - show crypto isakmp sa CLI - show crypto map [tag ] CLI - show interface cable / cable downstream dsg dcd CLI - show interface cable [/] cable downstream dsg CLI - show interface cable [/] cable downstream dsg verbose CLI - show interface fastethernet / access-group CLI - show interface gigabitethernet / access-group CLI - show ip ospf interface [brief] (PROD 70427) CLI - show ip ssh CLI - show ip ssh config CLI - show packetcable global CLI - show packetcable global dqos CLI - show packetcable global pcmm CLI - show packetcable transactions CLI - show snmp community CLI - show ssh host public-key CLI - trace logging packetcable Configuration File for Combined Voice and Data on the Same Upstream Debug IP Packet Capture DOCSIS Set-top Gateway Measuring SNR in the 2Dx12U CAM PacketCable Multimedia Overview Power levels for upstream channels on the same physical CAM connector.

26-732 26-733 26-734 26-735 26-736 26-738 26-761 26-758 26-760 26-785 26-786 26-817 26-829 26-830 26-864 26-866 26-867 26-868 26-896 26-831 26-965 16-38 13-15 18-1 10-23 16-5 10-4

PROD 60544 Sample output of "show cable modem detail" command updated to show CM capability and operation. Needed for DOCSIS 2.0. 17-21

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PROD 64234 Power levels for upstream channels on the same physical CAM connector. PROD 65114 PacketCable Compliance Updated PROD 65842 DCDs configured on a per-interface basis, not for entire cable bundle PROD 66221 Problem with SCN params and DSG tunnels

10-4 16-4 18-5 18-15



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List of Figures

3

C4 CMTS SpecificationsFigure 3-1: Figure 3-2: The C4 CMTS (front view) Typical Cable Data Network Architecture 3-2 3-3

4

C4 CMTS Power RequirementsFigure 4-1: Figure 4-2: Figure 4-3: Figure 4-4: Figure 4-5: C4 CMTS Front Access Panels LED and Power Bus Switches C4 CMTS Power Feeds (chassis rear) Second Level - Internal Branch Fusing Power Control Button 4-2 4-3 4-4 4-5 4-6

5

Installation RequirementsFigure 5-1: Internal Air Flow (side view) 5-9

6

Installing Modules and System Bring-upFigure 6-1: Figure 6-2: Figure 6-3: Figure 6-4: Figure 6-5: Figure 6-6: Figure 6-7: Front View of C4 CMTS C4 CMTS Chassis (rear view) Example of Old and New Front Filler Panels Location of Grounding Terminals Installing the Power Control Module (PCM) Cabling the PCM Example of Normal Speed Fan Module 6-3 6-5 6-6 6-8 6-10 6-11 6-13



1

List of Figures

C4 CMTS

Figure 6-8: Figure 6-9:

Example of High Speed Fan Module Installing the Fan Module

6-14 6-15 6-16 6-18 6-19 6-21 6-26 6-27 6-28 6-31 6-34 6-37 6-38 6-41 6-46 6-52 6-55

Figure 6-10: Air Flow Through the Chassis Figure 6-11: Installing the System Control Module Figure 6-12: Release Locking Latches in Order to Remove Module Figure 6-13: System Control Module (SCM) and PIC Figure 6-14: View of Pin-out of Rollover Cable Figure 6-15: Connecting the Console Port to a PC Figure 6-16: Fabric Control Module (FCM) and Filler Panel Figure 6-17: FastE NAM and PIC Figure 6-18: GigabitEthernet Network Access Module (GigE NAM) and PIC Figure 6-19: Gigabit Interface Converters (GBICs) Figure 6-20: Installing the GBIC Figure 6-21: 1Dx8U Cable Access Module (CAM) and PICs Figure 6-22: 2D12U Cable Access Module (CAM) and PIC Figure 6-23: Opening a Terminal Session on the C4 CMTS Figure 6-24: Sample Bootloader Dialog

79

NAM ConfigurationFigure 9-1: Block Diagram of NAM-Side IP Interface Bundling 9-7

10

Basic CAM ConfigurationFigure 10-1: One Way to Migrate Two 1Dx6 CAMs onto One 2Dx12U (example) 10-15

Figure 10-2: Migration Example: from 12 Upstreams on Two 1D/6U CAMs to One 2Dx12U 10-16 Figure 10-3: Two Examples of Slot Configuration after Migrating to 2Dx12U CAMs Figure 10-4: Network Example Each CM Sees Multiple Downstreams Figure 10-5: Example of CAM Sparing Groups 10-17 10-31 10-43

12

Configuring Router FunctionalityFigure 12-1: Example of Packet Flow Using Loopback Interface 12-23

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List of Figures

115

Authentication, Authorization, and Accounting (AAA)Figure 15-1: AAA Security Model 15-3

16

PacketCable ServicesFigure 16-1: PacketCable Network Reference Architecture Figure 16-2: Foundations of PCMM Architecture Figure 16-3: Network Diagram of PCMM Implementation 16-3 16-6 16-8

Figure 16-4: An Example of Classification for PacketCable 1.x In a Combined Voice and Data Environment 16-40

17

Baseline Privacy Interface (BPI)Figure 17-1: Example of Baseline Privacy Base Table 17-5

18

DOCSIS Set-top Gateway (DSG) ConfigurationFigure 18-1: Logical devices in a DSG system Figure 18-2: Block Diagram of an Advanced DSG Configuration 18-2 18-10

22

Flash Disk DescriptionFigure 22-1: Flash Disk Partition Structure 22-2

23

Logging and the C4 CMTSFigure 23-1: Event Management Subsystems on the C4 CMTS Figure 23-2: Show Logging Output Example Figure 23-3: Show Logging Throttle Output Example Figure 23-4: Show Logging History Output Example Figure 23-5: Show Logging History Last 10 Output Example Figure 23-6: Help Configure Logging Trap Output Example Figure 23-7: Show Logging Local Output Example 23-3 23-7 23-8 23-8 23-9 23-16 23-18

24

DiagnosticsFigure 24-1: C4 CMTS Diagnostic Software 24-3



3

List of Figures

C4 CMTS

Figure 24-2: CLI Output for Diagnostics Figure 24-3: Show Logging History Output Example (partial) Figure 24-4: Example of System Output for a Module that Failed Diagnostics

24-12 24-13 24-14

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6

Installing Modules and System Bring-upProcedure 6-1 Procedure 6-2 Procedure 6-3 Procedure 6-4 Procedure 6-5 Procedure 6-6 Procedure 6-7 Procedure 6-8 Procedure 6-9 How to Rack Mount the C4 CMTS How to Install the Power Conditioning Modules (PCMs) How to Cable the PCM How to Install the Fan Modules How to Install the SCM How to Install the SCM Physical Interface Card (PIC) How to Cable the SCM How to Install the FastE NAM How to Install the GigE NAM 6-8 6-10 6-11 6-15 6-24 6-24 6-26 6-33 6-35 6-35 6-38 6-39 6-44 6-44 6-52 6-54

Procedure 6-10 How to Install the GigE NAM Physical Interface Card (PIC) Procedure 6-11 How to Install the GBICs Procedure 6-12 How to Remove a GBIC Procedure 6-13 How to Install the CAM Procedure 6-14 How to Install the CAM Physical Interface Card (PIC) Procedure 6-15 How to Open the Terminal Emulator Session Procedure 6-16 How to Modify Boot Parameters

7

Clock Synchronization ProtocolProcedure 7-1 Procedure 7-2 How to Configure a Time of Day (TOD) Clock Protocol How to Choose Network Time Protocol (NTP) for C4 CMTS 7-1 7-2



1

List of Procedures

C4 CMTS

8

Host Names, User IDs, and Password RecoveryProcedure 8-1 Procedure 8-2 Procedure 8-3 How to Configure a Host Name and Logging Host IP Address How to Configure Privilege Levels and Authentication How to Enable Password Recovery Using Application Dialog 8-1 8-2 8-4

9

NAM ConfigurationProcedure 9-1 Procedure 9-2 Procedure 9-3 Procedure 9-4 How to Configure a Network Access Module How to Take a NAM Out of Service and Delete Its Slot How to Configure a Gigabit Ethernet Network Access Module How to Take a GigE NAM Out of Service and Delete Its Slot 9-3 9-4 9-5 9-6

10

Basic CAM ConfigurationProcedure 10-1 How to Create and Enable a 1Dx8U CAM Procedure 10-2 Example of Growing and Enabling a 2Dx12U CAM with Logical Channels Procedure 10-3 Migrating from a 1Dx8U Chassis to a 2Dx12U Chassis Procedure 10-4 How to Align IM Opportunities for Clone Groups Procedure 10-5 How to Create and Apply a Modulation Profile to an US Port Procedure 10-6 How to Configure an Upstream (US) Channel Procedure 10-7 How to Activate a CAM Procedure 10-8 How to Take a CAM Out of Service and Delete Its Slot Procedure 10-9 Configuring the Two Sparing Groups Shown in the Example Procedure 10-10How to Fail Back Manually Procedure 10-11How to Delete a CAM Sparing Group Procedure 10-12How to Create Interface Bundles Procedure 10-13How to Remove Interface Bundles 10-3 10-9 10-18 10-29 10-33 10-34 10-39 10-39 10-43 10-45 10-46 10-47 10-48

11

Control Complex RedundancyProcedure 11-1 How to Add a Control Complex (Change from Simplex to Duplex) Procedure 11-2 How to Change a Control Complex from Duplex to Simplex 11-2 11-3

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List of Procedures

12

Configuring Router FunctionalityProcedure 12-1 How to Monitor Interfaces Procedure 12-2 How to Enable Single Key Authentication Procedure 12-3 How to Enable Multiple Key Authentication (i.e., Key Chains) Procedure 12-4 How to Enable OSPF Procedure 12-5 How to Disable OSPF for an Interface Procedure 12-6 How to Disable OSPF (Globally) on the C4 CMTS Procedure 12-7 How to Add/Delete/View a Static IP Route to the C4 CMTS Procedure 12-8 How to Enable Multicast on a Cable Interface 12-3 12-13 12-14 12-16 12-18 12-18 12-26 12-31

13

IP Packet Filtering, Throttling, and CARProcedure 13-1 How to Add Filters to the CMTS 13-6

15

Authentication, Authorization, and Accounting (AAA)Procedure 15-1 Setting up SSH on the C4 CMTS Procedure 15-2 PuTTY, SSH, Public Key Authentication 15-17 15-17

23

Logging and the C4 CMTSProcedure 23-1 How to Route Events to the Console Procedure 23-2 How to Route Events to the Monitor Procedure 23-3 How to Configure the History Log 23-18 23-19 23-20

24

DiagnosticsProcedure 24-1 How to Restore Modules into Service 24-4



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1. About This Manual

TopicsIntended Audience Prerequisite Skill and Knowledge Purpose Conventions Used in this Document How to Contact Us

Page1 2 2 2 4

In response to emerging IP-based data and voice services, ARRIS brings to market a next-generation, carrier-class Cable Data Network Solution the Cadant C4 Cable Modem Termination System (CMTS). As of April 2005, there were more than 700 C4 CMTSs on four continents supporting 3.7 million subscribers. The C4 CMTS has been designed to meet the needs of the Multiple System Operator (MSO) in terms of system density, wire-speed performance, and reliability. The C4 CMTS enables MSOs to bundle high-speed data, voice, full-motion video, and other multimedia content to residential and business customers.

Intended AudienceThis document is intended for MSO technical support personnel who are responsible for integrating, operating, and maintaining the C4 CMTS.



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1 About This Manual

Prerequisite Skill and KnowledgeThis document serves as an introduction to the C4 CMTS for all administrators and users of cable modem termination systems. Ideally, users of this documentation and equipment should have a basic knowledge of the following: RF measuring equipment Provisioning servers Command Line Interface (CLI) RF cable plant and operating methods

PurposeThis document provides a comprehensive view of the C4 CMTS including reference and procedural information required to manage and control the C4 CMTS.

Conventions Used in this DocumentThis section presents the textual conventions used in this documentation set.

AdmonishmentsThere are three levels of admonishments used in this documentation. The first is a simple note. NOTE Notes are intended to highlight additional references or general information related to a procedure, product, or system. The international symbols, Caution and Warning, appear in this book when you must perform procedures involving risk.

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CAUTION

Cautions indicate risk of dropping traffic, losing data, or damaging equipment. Read the accompanying instructions and proceed with caution.

WARNINGThe warning symbol represents a risk of bodily injury or serious damage to the equipment. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and fiber optics and follow standard procedures for preventing accidents and serious damage.

Textual ConventionsThe conventions used in this guide are shown in the following table: Table 1-1: Examples of Textual Conventions Type of text CLI commands and other user input Names of chapters and manuals Menu selections System responses and screen display Description Monospaced bold (courier) Example configure slot type NAM chapter 1, AboutThis Manual From the File>Set-up menu choose Time since the CMTS was last booted: 12 days, 2: 8: 14

Italicized textPlain-faced text Monospaced font (courier)



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1 About This Manual

How to Contact UsProduct Information and Support If you have questions about the ARRIS C4 CMTS, G2 IMS software, installation procedures, or this guide, pleases contact your ARRIS account representative. The Technical Support Contact information is summarized in the following table: Table 1-2: Product Technical Support Contacts C4 CMTS Support Information NORTH AMERICA E-mail Toll Free Phone Worldwide Phone Hours LATIN AMERICA E-mail Phone Hours EUROPE E-mail Phone Hours ASIA (except Japan) E-mail Phone Hours E-mail Phone Hours E-mail Phone Hours JAPAN - Fukuoka Office [email protected] +81 92 473.2671 9:30 am to 6 pm (09:30 to 18:00) Fukuoka local time JAPAN - Tokyo Office [email protected] +81 (0) 3 5371.4142 9 am to 5 pm (09:00 to 17:00) Tokyo local time [email protected] +81 (0) 3 5371.4142 9 am to 5 pm (09:00 to 17:00) Tokyo local time [email protected] +31 23.554.3880 (English, Spanish, French) 08:30 to 17:30 pm CET [email protected] +56.2.369.5628 9 am to 6 pm (09:00 to 18:00) [email protected] 1+.888.221.9797 (North America Only) 1+678.473.5656 8 am to 8 pm (08:00 to 20:00) Eastern Standard Time

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Emergency support is available after normal business hours by calling the same numbers listed above. Additional contact information can be obtained from the ARRIS web page at http://www.arrisi.com and clicking on the link to the Customer Center. Training Information ARRIS Training is the authorized organization for training on voice, data, and provisioning products. Web-based, instructor-led, and customized courses are available at our U.S. training center in Atlanta. On-site training is available.To obtain pricing for on-site training and other training information, visit our web site: http://www.arrisi.com Comments on this Document Our goal has been to create a document that best fits your needs. We are interested in your suggestions for improving this document. You may address comments or questions regarding this documentation directly to the Documentation and Training Manager: Jim Morgan ARRIS Customer Documentation and Training Manager PH: 770-622-8760 FX: 678-473-5218 [email protected]



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1 About This Manual

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2. C4 CMTS Features

TopicsC4 CMTS Feature Descriptions by Software Release Feature Descriptions

Page4 8

This chapter introduces the C4 CMTS and its features, functionality, and components. This chapter contains the following topics: Descriptive and reference information Features list

DOCSIS 2.0 ComplianceIn December, 2004, the Cadant C4 Cable Modem Termination System (CMTS) received DOCSIS 2.0 requalification by CableLabs with the new software upgrade designed to support DOCSIS Set-top Gateway (DSG) technology. With this qualification, the Cadant C4 CMTS, configured with the higher density 2Dx12U CAM provides the most reliable and scalable CMTS solution currently available. Using it, MSOs can provide their customers with advanced voice and high-speed data solutions.



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The Cadant C4 CMTS supports DOCSIS Set-Top Gateway (DSG), allowing operators to transition the signaling, provisioning and control of advanced set-top boxes from proprietary to standards-based protocols. This transition of all services to IP-based standards is expected to streamline operations and lower capital costs for cable operators. The DOCSIS 2.0 standard greatly improves performance in the upstream path of the cable network. The growing demand for peer-to-peer file sharing, interactive gaming, and voice over IP telephony increases the need for upstream bandwidth. The following enhancements are available to CMTSs and CMs that comply with the 2.0 standard while maintaining all the DOCSIS 1.1 and 1.0 functionality: Enhanced upstream capacity Greater maximum upstream throughput up to 30.72 mbps per channel Greater upstream channel width up to 6.4 Mhz New upstream channel modulation rates: 8QAM, 32QAM, and 64QAM Longer preamble to facilitate synchronization up to 1536 bits Higher powered preamble QPSK-1 Enhanced noise cancellation and error correction Synchronous-Code-Division Multiple Access (SCDMA) operation along with the standard TDMA and ATDMA techniques for combining CM signals onto a given upstream channel.

Fault Detection and RecoveryThe C4 CMTS employs: Advanced data-path integrity checks (parity, CRC, loopbacks, pings) Continuous system audits Multiple levels of error detection.

Fault recovery on the C4 CMTS: Rapidly isolates faults Decreases diagnostic and repair time Reduces the probability of fault propagation Minimizes impact on subscriber services.

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Interfaces and ProtocolsOpen interfaces and protocols allow seamless integration with existing network management infrastructures. The primary protocols supported by the C4 CMTS include the following: Simple Network Management Protocol (SNMP) v1, v2c, and v3 DOCSIS 1.1, DOCSIS 2.0 and Cadant MIBS Command Line Interface (CLI) File Transfer Protocol (FTP) Telnet Routing Information Protocol (RIPv2) Open Shortest Path First (OSPFv2)

Security FeaturesUnique security measures ensure plant and subscriber integrity through: DOCSIS 1.1 BPI+ encryption Administrative isolation by means of a separate physical interface Packet filtering Proxy ARP Password and key authentication for RIP and OSPF Authentication using RADIUS Secure Shell (SSH) Access Control Lists (ACLs) Multi-stage Denial of Service throttling mechanisms in hardware and software TACACS+ Protocol throttling

IP Filtering OptionsThe IP filtering feature is dependent on the subscriber management MIB.1

1. For information on the applicable standards, see the appropriate draft documents of the Internet Engineering Task Force at www.ietf.org. Look for the latest version of DOCSIS Subscriber Management MIB.



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2 C4 CMTS Features

C4 CMTS Feature Descriptions by Software ReleaseThe ARRIS C4 CMTS Release 4.2 aggregated Feature Set is comprised of the Baseline Feature Set, plus the features of software Releases 3.0, 3.3, 4.0, 4.1, and 4.2. Baseline Features The ARRIS C4 CMTS feature set includes: Complete DOCSIS 1.1 support Maximum cable interface density per rack unit High scalability Guaranteed Service Level Agreements (SLAs) support IGMPv2 & Multicast Flow Support Carrier-class availability and operation Static Layer 3 Routing Layer 3 Router Functionality including

Release 3.0 Features

Router Information Protocol (RIPv2) Open Shortest Path First (OSPFv2) Equal Cost Multipath Load Balancing (ECMP)

FlexCAM Technology for CAM sparing (hitless operation for sparing groups up to 7+1) Dynamic Route Redundancy Control Complex Redundancy

The following features were added with Release 3.0: GigE Network Access Module (Gig-E NAM) Authentication using RADIUS Secure Shell (SSH) In-Band Management and Access Control Lists (ACLs) Upstream Load Balancing (ULB) Multiple syslog servers

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The following features or improvements have been added for release 3.3: PacketCable Qualification Increased subscriber limits per chassis: 24K CM Increased VoIP Call Capacities Improved Password Recovery Loopback Interface Multiple Subinterfaces per VRF Loopback Interfaces for routing protocols Number of filters in group increased to 31 Support for Authentication, Authorization, and Accounting (AAA) [RADIUS & TACACS+] In-Band Management: Access to the SCM via the loopback IP address Support for Packet Cable Automatic System Backup during Upgrade Improved Baseline Privacy Interface (BPI) Domain Name System (DNS) Support for Telnet, Traceroute, and Ping

CLI Improvements: Extended ping command show ip interface brief show temperature reset all CMs traceroute CLI command configure authorization COS and 1.0 Modems configure logging priority configure privilege exec level



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2 C4 CMTS Features


The following features or improvements have been added for release 4.0: 2Dx12U CAM full DOCSIS 2.0 (A-TDMA and S-CDMA) Proprietary automatic ingress noise cancellation Flash disk re-partitioning Graceful restart with OSPFv2 Real-time FFT of upstream (compatible with C3 CMTS MIBs) NAM IP interface bundling Increased subscriber limits per chassis: 32,000 CMs per chassis, and 3,000 CMs per downstream (500 per upstream in 1x6 operation) Preemption of normal calls by new emergency calls when BW is limited Additional audits: FCM, file system, 2Dx12U CM reset clear trap Flap List enhancements:

percent of station maintenance ranging opportunities that receive a range request - number of power adjustments exceeding a threshold Number of CRC errors per CM (2D only) Number of bytes dropped per CM (congestion and policing) Virtual System Controller CLI Improvements:

-

show/copy running-config show cable qos profile assign and display in output name/description for each interface

To look up syntax and parameters for individual CLI commands, see Chapter 26, CLI Command Descriptions. Each entry in the alphabetical list of commands is a hyperlink to the appropriate page in the manual. Automatic fan speed control Encrypt the MD5 shared secret for routing protocols in CLI output Disable ICMP Unreachables OSPF "point-to-point" interface support Increased AC/DC power solution Voice call requirements:

-

At least 1,000 MTAs per downstream At least 5,000 BHCAs with completion rate of 99.5% At least 260 half-calls per downstream

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NOTE The voice call requirements are reduced by one-half in a mixed voice and data environment. Release 4.1 Features The following features or improvements have been added for release 4.1: Release 4.2 Features Committed Access Rate Global Traffic Shaping for TCP Traffic Remote Query of Cable Modems

The following features or improvements have been added for release 4.2: DOCSIS Set-top Gateway (DSG) Agent Associate ACL with SNMP Community String Advanced CM Config File Verification Scalability 52K CMs per chassis Modify overload control to ensure "older" CMs range/register in reasonable time through overload conditions (chassis reboot, CAM insertion, etc.) "Debug" IP Filter Packet Capture capability (ability to capture packet headers that match IP filters or similar functionality) PacketCable Multimedia Network side ACLs Support for 16 telnet sessions Clear the IP filter counters through the CLI Hitless software update PacketCable 1.x Voice call requirements

-

MTAs /downstream (1D) 1000 MTAs/downstream (2D) 1500 MTAs/C4 20000 - Lines/downstream 1800 Lines/C4 24000 - BHCA/downstream 5000 BHCA/C4 66600 - Simultaneous half calls/downstream 260 Programmable unicast request opportunity polling interval

NOTE The voice call requirements specifically assume that only GNAMs are used. If the system contains any FastENAMs, the per-chassis line and MTA limits must be reduced to 1000.



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2 C4 CMTS Features

Certain features may impact software upgrade procedures. For more information related to upgrades or for non-conformance issues, see the Cadant C4 CMTS Software Upgrade Notes. This file is included on the software CD.

Feature DescriptionsIn addition to the previously described features and functionality, the following section describes the C4 CMTS feature set. This includes: Layer 3 Router Functionality including

Router Information Protocol (RIPv2) Open Shortest Path First (OSPFv2) Equal Cost Multipath Load Balancing (ECMP) FlexCAM Technology for hitless CAM sparing (hitless operation for sparing groups up to 7+1) Dynamic Route Redundancy Control Complex Redundancy Secure Shell In-band Management with ACLs Upstream Load Balancing Multiple Syslog Servers

Each feature is explained in the following sections. RIPv2 RIP is a distance vector routing protocol that learns routes dynamically without provisioning. RIP requires little overhead and is easy to implement. The C4 CMTS implements RIPv2. Unlike the original version of RIP, this version supports subnet masks and Message Digest 5 (MD5) authentication. For more information on the standard, see Request For Comments (RFCs) 2453 and 1058. OSPFv2 OSPF is a dynamic link-state routing protocol developed by the Internet Engineering Task Force and is published as RFC 2328. Rather than counting the number of hops as a metric, OSPF bases its path descriptions on link states that take into account additional network information. OSPF also lets the user assign cost metrics to each interface so that some paths are given preference. Equal Cost Multipath The Equal Cost Multipath (ECMP) feature allows an administrator to route designated traffic across multiple routes while balancing traffic across up to four equal cost routes. If more than four equal cost routes are learned

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by the C4, then the extra routes are not active. Each IP datagram is examined to determine its route according to the Destination IP address. If multiple equal cost routes are found, the route chosen is based on the source IP address of the packet. Assuming an even distribution of source IP addresses, the load through the equal cost routes is balanced. FlexCAM Sparing Hitless CAM sparing is an important element of system reliability and greatly reduces subscriber impact and loss of traffic in the event of CAM failure. Hitless sparing occurs when an active CAM goes down and a spare CAM becomes active. The CMs remain on-line and do not have to re-range and re-register. The C4 CMTS supports CAM sparing groups up to 7+1 in size (seven active CAMs backed up by one spare). The Dynamic Route Redundancy feature allows the C4 CMTS to dynamically update a specific route in hardware based on a change in the network topology. The update will only occur if a redundant route for a specific IP prefix exists in software. A Control Complex consists of one SCM and one FCM. In a fully equipped chassis there are two Control Complexes, one active and one standby. Control Complex Redundancy (CCR) ensures high reliability for systemwide OAM&P, switching, and routing. The control complex redundancy feature provides 1+1 active/standby redundancy between two pairs of SCM/FCM modules. The failure of an active SCM/FCM pair immediately causes a failover to the standby SCM/FCM pair. Secure Shell The C4 CMTS Secure Shell protocol version 2 (SSH2) feature provides enhanced privacy and security, including: In-Band Management with ACLs Secure encrypted connection capabilities using an SSH2 server User authentication by internal password External RADIUS password or user digital signatures (public keys) Secure connections to the C4 CMTS CLI and file systems Secure FTP (SFTP)

Dynamic Route Redundancy

Control Complex Redundancy

The C4 CMTS offers enhanced network management with controlled access to the SCM via standard Access Control Lists (ACLs) for CMTS administrators. This feature provides: IP connectivity to the SCM through the client cards (NAM, GigE NAM, and CAMs), and The ability to permit or deny access to the SCM via the client cards from specified subnet or host addresses.



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2 C4 CMTS Features

Upstream Load Balancing

The Upstream Load Balancing (ULB) feature provides upstream load balancing on registering CMs among upstream channels to which those CMs are physically attached. The automatic decision to load balance is based on a comparison of the cumulative reserved bandwidth of upstream channels at the time a new CM is attempting to perform initial maintenance ranging. The ULB feature is provisionable per cable group, (i.e. a downstream channel and all associated upstream channels that occupy the same physical cable). NOTE This feature should not be activated for cable groups with CMs that are already configured to connect to specific upstream channels.

Multiple Syslog Servers

The C4 CMTS has the ability to configure and send logging messages to up to eight syslog servers (hosts).

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3. C4 CMTS Specifications

TopicsNetwork Diagram C4 CMTS Specifications RF Electrical Specifications Maximum Density Scalability VoIP Call Capacities

Page3 4 6 7 7 8

This chapter introduces the C4 CMTS and its features and functionality. This chapter contains the following topics: Descriptive and reference information Physical design information Power and electrical requirements



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3 C4 CMTS Specifications

Figure 3-1 illustrates the front view of the C4 CMTS. There are a total of twenty-one slots for modules. There are four main types of modules used to equip the slots in the front. These are sometimes referred to as front cards. Smaller modules, called Physical Interface Cards, or PICs, are inserted in each slot from the rear of the chassis. The PICs provide physical connectors for terminating cables from the subscriber and Internet networks. Between the front and back slots is the midplane of the chassis. Three C4 CMTS chassis can be mounted in a single 19-inch wide, sevenfoot standard rack.

Figure 3-1: The C4 CMTS (front view)

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Network DiagramA cable data network system consists of cable modems (CMs) at subscriber premises, a CMTS at the cable plant operations area, a data-over-cable management software suite integrated with the operator's other management systems, and the HFC cabling that connects it all. DOCSIS defines the standard for communication among these elements. The C4 CMTS provides data switching functions as well as the radio frequency (RF) interface to and from the cable plant. It also provides ethernet interfaces to the Internet Service Provider(s). The data-over-cable management system provides both the end-to-end network management solution and the support for subscriber provisioning. Figure 3-2 shows a typical cable data network architecture.

TFTP Server

TOD Server

DHCP Server

10/100 Ethernet Switch

Router

Internet

AC DC Power Converter

CMTS

CATV Network HFC Plant

Cable Modem

CPE

Figure 3-2: Typical Cable Data Network Architecture



3-3


C4 CMTS SpecificationsThis section is a summary of the C4 CMTS physical characteristics and operating specifications, and information on compliance with regulatory standards. Physical Mounting: Dimensions: 19- or 23-inch rack, or stand-alone Height Width Depth 24.5" 17.4" 20.0" (622 mm) (442 mm) (508 mm) (75.5 Kg)

Power

Chassis Weight (fully equipped): 166 pounds

Operating voltage: nominal -48 VDC, range -44 to -72VDC Note: Once powered up the C4 CMTS will continue to operate if within this voltage range. Start-up voltage range: -44 to -67.5VDC Note: If powered down, the C4 CMTS will not restart successfully if the voltage is not in the range of -44 to -67.5VDC. This offset from the operating range provides a cushion against multiple possible power cycles. Attempted start-ups at the voltage extremes are subject to power fluctuations that could result in multiple power cycles and damage to the equipment. Chassis Power Consumption: 2800W maximum The -44V guaranteed operating limit translates to a maximum current draw of 64A at 2800W.

Safety

The C4 CMTS meets the following safety standards: UL60950 (1999) Third Edition CAN/CSA-C22.2, No. 950-95 IEC60950-1 (2001), First Edition

Electromagnetic Compatibility

The C4 CMTS meets the following: GR-1089-CORE, Issue 3 (FCC - Part 15, Class A) EN 300 386 v1.3.1 (CISPR 22, Class A)

Network Interfaces

The C4 CMTS is equipped with the following interfaces: 10 Base-T (SCM Maintenance Port) 10/100 Base-T (FastE or GigabitE NAM) 1000 Base-TX, 1000 Base-SX, 1000 Base-LLX, 1000 Base-LX (GigabitE NAM)

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Environmental

Thermal The C4 CMTS meets the following environmental standards: NEBS GR-63-CORE, ETS 300 019

Operating temperature: Short term: -5 to +55C Long term: +5 to +40C Non-operating temperature: -40 to +70C Operating humidity Short term: 5 to 90%, non-condensing Long term: 5 to 85% Non-operating humidity: 5 to 95%, non-condensing

Mechanical NEBS GR-63-CORE ETS 300 019

In-use (Class3.1E) Storage (Class 1.2) Transportation (Class 2.3)

Other NEBS Level 3 Criteria (SR-3580) Acoustic Noise Criteria:

NEBS (GR-63-CORE) ETSI (ETS 300 753) Altitude Criteria (NEBS GR-63-CORE) Illumination Criteria (NEBS GR-63-CORE)



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RF Electrical SpecificationsThe following table lists the downstream RF electrical specifications. Table 3-1: Downstream RF Electrical Specifications Center frequency range: North America Europe Frequency step size Modulation types Annex B symbol rates in Msym/sec Annex A symbol rate in Msym/sec Raw bit rate: Annex B 64QAM 256QAM) Raw bit rate: Annex A 64QAM 256QAM) Output signal range Return loss Transmit output power accuracy Output impedance 91 - 857 MHz 112 - 858 MHz 250 kHz 64QAM, 256QAM 64QAM: 256QAM: 64QAM or 256QAM: 30.342 Mbps 42.884 Mbps 41.712 Mbps 55.616 Mbps 50-61 dBmV < 14 dB in-band Adjustable to within +/-.5 dB 75 5.056941 5.360537 6.952

The following table lists the upstream RF electrical specifications. Table 3-2: Upstream RF Electrical Specifications Upstream frequency band: North America Europe Japan RF channel spacing Modulation types Raw bit rate Forward error correction 5 - 42 MHz 5 - 65 MHz 5 - 55 MHz < 1 kHz Type 4 TLVa: QPSK, 16QAM Type 5 TLV: QPSK, 8QAM, 16QAM, 32QAM, and 64QAM 30.72 Mbps max Reed-Solomon (T = 1-16)

a. Type-Length-Value (TLV) 4 or 5 are codes used in UCD messages to indicate DOCSIS 1.x or 2.0 compatibility, respectively.

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The following is a list of receiving input levels for upstream channels: Table 3-3: Receiving Input Levels for Upstream Channels Channel Width (kHz) 200 400 800 1600 3200 6400 Symbol Rate (ksm/sec) 160 320 640 1280 2560 5120 Maximum Range (dBmV) -16 to +14 -13 to +17 -10 to +20 -7 to +23 -4 to +26 -1 to +29

Maximum DensityThe C4 CMTS supports both small and large scale subscriber deployments. The C4 CMTS chassis supports up to 32 downstream channels and 192 upstream channels. Up to three chassis can be installed in a standard 7-foot high, 19-inch wide frame. A fully configured rack supports a maximum of 96 downstream and 576 upstream channels. Operating ratios of downstream to upstream channels range from 1:1 to 1:12, assuming use of the 2Dx12U Cable Access Module.

ScalabilityARRIS offers a number of combinations of downstream to upstream channel ratios to improve scalability. With the ability to accommodate many configurations, the CMTS can grow to meet evolving subscriber traffic considerations along with reducing inter-shelf cabling. This leads to lower cost for installation, operations, and maintenance. Using multiple NAM ports within one CMTS chassis enables use of dynamic route redundancy. This allows an MSO to set multiple routes to a single destination. These routes can be provisioned on different NAM ports with different weights, thus providing a NAM redundancy strategy.



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A fully equipped C4 CMTS chassis offering basic service will provide reasonable performance up to the following suggested subscriber limits: 52,000 CMs per chassis 128,000 ARP cache entries 128,000 Destination IP entries (using GigE NAM) 3,000 CMs/downstream (whether 1Dx8U or 2Dx12U CAM) Up to 500 CMs for each upstream of a 2Dx12U CAM configured for 1Dx6U service.

VoIP Call CapacitiesThe following Voice over Internet Protocol hardware and call limits apply to C4 CMTSs configured for DSx/DQoS VoIP or PacketCable voice. The Multimedia Terminal Adapter (MTA) is a telephony modem: MTAs per downstream (1D): MTAs per downstream (2D): MTAs per C4 CMTS: Lines per downstream Lines per C4 CMTS: 1,000 1,500 20,000 1,800 24,000

Busy Hour Call Attempts (peak 60-minute call loads supported) BHCA per downstream: BHCA per C4 CMTS: Simultaneous half-calls/downstream The assumptions for the call load are: Lines per sub.: Centi-Calls per Second (CCS) per line: Hold time: Call Completion Rate: 1.2 5 180 seconds 99.5% 5,000 66,600 260

These limits specifically assume that only GigE NAMs are used. If the system contains any FastE NAMs, the per-chassis line and MTA limits must be reduced to 10,000. These limits also depend on the following: MTAs/lines are distributed evenly across 4 upstreams per downstream 256QAM downstream 16QAM upstream 3.2 MHz upstream channel width Upstreams 0-5 on MAC domain 0; upstreams 6-11 on MAC domain 1

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4. C4 CMTS Power Requirements

TopicsComponents of the Power System Power Protection Description

Page1 3

The C4 CMTS requires two -48V power feeds, named A and B. The source can be an external battery plant or independent AC/DC power supplies. In the event the A or B feed fails or is removed from service for maintenance, the other feed continues to supply power to the C4 CMTS with no interruption in service. NOTE Review the total current consumption of all equipment on the same line before supplying power to the C4 CMTS. Avoid sharing a power source that requires large currents.

Components of the Power SystemPower is filtered and conditioned by a Power Conditioning Module (PCM) for each feed. The PCM contains the power input connector, main breaker, and all active circuitry for power distribution over a power bus.



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4 C4 CMTS Power Requirements

The PCM: Soft starts the chassis on power up Filters noise and power disturbances from the power feeds Monitors the power draw of the chassis and shuts down a branch circuit in the event of a power fault

Each PCM is removable and can be replaced without interrupting power to the C4 CMTS in a duplex power configuration.

Front Panel Access

Protective panels mounted on the front of the chassis flip open, as illustrated in Figure 4-1. The top single panel flips up to reveal the power panel and power LEDs. The mid and lower matching panels flip open to allow access to the ejector clips for the front modules. Another small panel is found beneath the lower matching pane. The chassis slot numbers are printed on it; it flips down to allow access to the air filter.

Access to Power Panel

Power Panel

Access to Modules Modules

Air Filter Fan Modules

Figure 4-1: C4 CMTS Front Access Panels

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Figure 4-2 shows the LEDs and power switches for Buses A and B. The system alarm and power indicator LEDs are in the middle of this panel.SYSTEM ALARMS

CRITICAL

ON OFF/ FAIL A B C D

MAJOR


MINOR

POWER

Figure 4-2: LED and Power Bus Switches

Power Protection DescriptionThe C4 CMTS chassis power configuration consists of three levels of protection: A and B power feeds controlled by circuit breaker in the PCM Internal chassis branch fuses located in the PCM Fuses located on the front modules (These fuses are not field replaceable)

The C4 CMTS must be installed only by trained service personnel who are familiar with the precautions required when working in a 48V DC power delivery environment. Power requirements are listed in C4 CMTS Specifications on page 3-4.

A and B Power Feeds

Power is supplied to the C4 CMTS via A and B feeds located at the rear of the unit. The power feeds are protected by two 70-amp breakers located on the rear of the chassis, shown in Figure 4-3. This is the first level of protection.



4-3


They also serve as the master disconnect switch for the unit. The breakers protect the high current-carrying cables within the C4 CMTS and the power connectors located at the rear of the unit.

POWER CABLE B

POWER CABLE A

Breaker switch for Power Module B

Breaker switch for Power Module A

Figure 4-3: C4 CMTS Power Feeds (chassis rear)

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Internal Branch Protection

Each A and B power feed is further divided into four internal chassis distribution branches, A through D. Each of these branches is protected by a 20-amp fuse located in the PCM. These fuses constitute the second level of protection. They are not field replaceable, nor can they be reset. These feeds supply power to the C4 CMTS midplane and to all circuit modules. Power is distributed to the twenty-one slots by the four branches as shown in Figure 4-4.SYSTEM ALARMSCRITICAL


MAJOR


MINOR

POWER

Network Access Module (NAM)

Network Access Module (NAM)

0

1

2

3

4

5

6

7

8

9

10 11 12 13 14 15 16 17 18 19 20

Figure 4-4: Second Level - Internal Branch Fusing If, for example, a damaged module or bent pin causes an electrical short, the fuses protect the power distribution wiring and midplane circuitry from damage. The entire feed for a side is turned on and off by pressing the power control button on the power panel. Each push of the button toggles the power from that feed (one push turns it off, the next push turns it on).



4-5

System Control Module (SCM)

System Control Module (SCM)

Fabric Control Module (FCM)

Cable Access Module (CAM)















Fabric Control Module (FCM)


In the event of a power fault on a branch: The electronic breaker for that branch detects the failure and removes power from that branch. A system power alarm is generated. The green power OK LED for that branch is turned off and the corresponding red branch power fault LED is turned on.SYSTEM ALARMS

CRITICAL


MAJOR


MINOR

POWER

Figure 4-5: Power Control Button Module (Board-level) Fuses The third level of protection is at the module level. Each front module (CAM, NAM, FCM, or SCM) has two fuses that protect its internal circuitry. One fuse is located on the circuit powered by the A bus; and the other on the circuit powered by the B bus. These on-board module fuses are not field replaceable: if the fuse blows the module must be returned for repair.

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5. Installation Requirements

TopicsSafety Precautions Electrostatic Discharge (ESD) Installation Checklist Unpacking the C4 CMTS Installation Considerations

Page2 3 4 6 7

This chapter provides the operating precautions and installation requirements for the C4 CMTS. NOTE Do not make any mechanical or electrical modifications to the CMTS equipment. If modified, the C4 CMTS may not meet regulatory compliance.



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5 Installation Requirements

Safety PrecautionsThis section provides safety precautions for installing the C4 CMTS. When setting up the equipment, please observe the following: The C4 CMTS is intended to be installed only in restricted access areas for reasons of security and safety. Follow all warnings and instructions marked on the equipment. Ensure that the voltage and frequency of your power source meets or exceeds the voltage and frequency listed on the equipments electrical rating label. Never force objects of any kind through openings in the equipment because dangerous voltages may be present. Foreign objects may produce a short circuit resulting in fire, electric shock, or damage to the C4 CMTS and other equipment.

Lifting SafetyA fully-equipped C4 CMTS weighs approximately 166 lbs. The chassis is not intended to be moved frequently. Before installing the C4 CMTS, ensure that your site is properly prepared. When lifting the chassis or any heavy object, follow these guidelines: Always disconnect all external cables before lifting or moving the chassis. Do not attempt to lift the chassis by yourself: have at least one other person assist you. Ensure that your footing is solid and balance the weight of the object between your feet. Lift the chassis slowly. Never move suddenly or twist your body as you lift. Keep your back straight and lift with your legs, not your back. If you must bend down to lift the chassis, bend at the knees, not at the waist, to reduce the strain on your lower back muscles. Lift the chassis from the bottom, grasping the underside of the chassis exterior with both hands.

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Electrical Equipment GuidelinesFollow these basic guidelines when working with any electrical equipment: Know where the emergency power-off switch is located for the room in which you are working. Disconnect all power and external cables before moving the chassis. Do not work alone if potentially hazardous conditions exist. Never assume that power has been disconnected; always check. Do not perform any action that makes the equipment unsafe or might create a potential danger to people. Examine your work area for possible hazards such as ungrounded power extension cables, missing safety grounds, or wet floors. CAUTION

Be sure to connect the chassis to ground before applying power or inserting modules. An ungrounded chassis may damage components.

Electrostatic Discharge (ESD)The C4 CMTS is designed to operate in an area that is between 5 to 95 percent relative humidity, non-condensing.

Preventing Electrostatic Discharge DamageElectrostatic Discharge (ESD) can damage equipment and impair electrical circuitry. ESD occurs when printed circuit modules are improperly handled. It may result in module failure or intermittent problems. The C4 CMTS contains replaceable, printed circuit modules. Modules are equipped with a metal faceplate that features Electromagnetic Interference (EMI) shielding and lever-action latches. Handle the modules by their latches and avoid touching the printed circuit board and connector pins. Although the metal faceplate helps to protect the printed circuit modules from ESD, wear an antistatic wrist or ankle strap whenever handling the modules or port adapters. Ensure that the anti-ESD device makes good skin contact. The chassis is equipped with four sockets in which you can ground plug-in wrist straps.



5-3


Installation ChecklistInstallation involves mounting the unit in a rack, populating with client Modules and Physical Interface Cards (PICs), attaching cables, and configuring software. Follow the instructions in this section when installing the C4 CMTS for the first time. Table 5-1: Installation Checklist Completed ( ) Task Description Become familiar with component descriptions Unpack the CMTS according to the instructions in

Unpacking the C4 CMTS on page 6

Obtain any necessary items not supplied to install the CMTS in your configuration Prepare the site for installation in accordance with placement and electrical considerations Install C4 CMTS in rack Attach the grounding cable. Install the three fan modules Install the two Power Conditioning Modules Install the Physical Interface Modules (PICs) Install the client Modules Attach to DC power (See Chapter 2) Attach cables Attach to an operator console Power up the CMTS Configure the CMTS according to the instructions in

Initial System Configuration, page 6-51.

Tools RequiredThe following tools are required for installation: #3 Phillips screwdriver for large bolts used for attaching to frame #2 Phillips screwdriver Digital volt meter

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Items

Not SuppliedThe following items are not included with the C4 CMTS. Obtain these items before installation: Appropriate network cables Operator console or PC with asynchronous terminal emulation built in Duplex filter Splitters Coax cables 48 Vdc power supply



5-5


Unpacking the C4 CMTSWhen unpacking the C4 CMTS, use the following steps and checklist: Inspect the shipping crate before removing the unit. If there is evidence of damage to the crate upon receipt, request an agent of the carrier to be present before removing the C4 CMTS. Installation is minimally a two-person operation. Ensure the crate is right side up. Open crate and carefully remove the packaged unit inside. Then remove the protective foam from the unit. Remove the remaining contents of the crate. Front modules are shipped in separate cartons. Check the packing slip and verify its contents. If an entire C4 CMTS is ordered, it typically ships with the following items. Use the checklist provided below to verify that the required items are present.

Table 5-2: Hardware Shipment Checklist ( ) One C4 CMTS chassis One (1) chassis ground cable (green, 4 gauge, approx. 24 inches) Two Power Conditioning Modules Two (2) power cables: one each for power feeds A (red, 6 gauge, approx. 50 ft) and B (blue, 6 gauge, approx. 50 ft) Modules for basic configuration (minimal requirement): One System Control Module (SCM) and associated physical interface card (PIC) One Fabric Control Module (FCM) One Network Access Module (FastE NAM) or one Gigabit Ethernet Network Access Module (GigE NAM) and associated PIC One Cable Access Module (either a 1Dx8U or 2Dx12U CAM) and associated PIC Required Items

Seventeen (17) front filler panels Eighteen (18) rear filler panels (there is no PIC for the FCM) Three (3) fan modules One (1) air filter (installed) One (1) hardware installation kit One (1) ESD Wrist Strap One (1) rollover cable and adapter for console connection to SCM serial port

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( ) Documentation:

Required Items (Continued) CD-ROM (standard) Paper (if ordered)

Module ProtectionAll spare modules are shipped in reusable anti-static shielding bags. If modules are not immediately installed, keep them in these antistatic bags. Do not remove modules from the antistatic bags unless properly grounded. Do not place these bags on exposed electrical contacts or else the modules may short circuit.

Installation ConsiderationsRack MountingThe C4 CMTS is designed to be mounted in a standard 7-foot by 19-inch equipment rack, compliant with EIA RS-310. A total of three chassis can be installed in this equipment rack. Uneven mechanical loading of an equipment rack can be hazardous. Plan the installation so that the weight of the equipment is evenly distributed across the vertical height of the rack. Depending on the number of modules supported, some C4 CMTS configurations are heavier than others. Place the heaviest units toward the bottom of the rack.

Chassis PlacementInstallation Area Select an appropriate installation area that is dry, relatively dust free, wellventilated, and air conditioned. Be sure the floor is capable of supporting the combined weight of the rack with the installed equipment.



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CAUTION

The C4 CMTS generates a significant amount of heat. It is important to provide a balanced environment so the C4 CMTS performs properly. Allow enough space around the C4 CMTS for adequate ventilation and do not block the air vents. Inadequate ventilation could cause the system to overheat.Clearance Allow sufficient clearance around the rack for maintenance. If the rack is mobile, place the C4 CMTS near a wall or cabinet for normal operation and pull it out for maintenance (installing or moving port adapters, connecting cables, and replacing or upgrading components). Be sure there is enough cable length available to pull the C4 CMTS out for repairs or adjustments if necessary.

Power RequirementsThe C4 CMTS uses dual redundant -48V power feeds to supply electrical power to the system. The system is capable of operating from a single feed in case one of the feeds fails. The system consumes a maximum of 2800W of power when equipped with the maximum number (16) of 2Dx12U CAMs. The supply voltage should be a nominal -48V. The operating range is -44 to -72V. The system will shut down if the voltage exceeds these limits. The -44V guaranteed operating limit translates to a maximum current draw of 64A at 2800W. Circuit breakers on the power feeds should be sized accordingly. The Power Conditioning Modules in the C4 CMTS will limit the startup current to prevent false tripping of the circuit breakers.

Cooling RequirementsThe C4 CMTS should be installed in a location with adequate ventilation. It is designed for long-term operation at ambient air temperatures ranging from 5-40C. To determine cooling requirements, assume 2800W for worst-case power dissipation when using 2Dx12U CAMs. These values assume the worstcase cooling requirements when the maximum number of CAMs (16) are used. The C4 CMTS draws cooling air in through the front, sides, and back at the bottom of the unit and expels it out the sides and back at the top of the unit. Clear airflow must be maintained in these areas to ensure adequate ventilation. If the C4 CMTS is installed in a closed or multi-unit rack

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assembly, the inlet air temperature could exceed the room ambient air temperature and/or the air flow may be reduced. In these cases the C4 CMTS requires a reduced maximum operating ambient air temperature. CAUTION

As with all electrical equipment, operation at excessive temperature accelerates the deterioration of components and adversely effects performance. Prevent excessive heat buildup in the rack.Fan Module Description As shown in Figure 1-1, the fan modules: Draw in air through the intake vent at the bottom of the chassis Moves the air across the internal components in order to cool them Moves air out the exhaust vent on the top rear of the chassis

Front of Chassis

Rear of Chassis

Figure 5-1: Internal Air Flow (side view)



5-9


NOTE To ensure the proper air flow, make sure blank filler panels are installed in unoccupied chassis slots. It is also important to change the fan filter at least every two to three months, depending on the air quality on site.

CAUTION

Care should be taken when dressing RF cables that they do not obstruct the grillwork at the top rear of the chassis. This grill is the primary heat vent for the chassis. Blocking it can cause overheating and card failure. ARRIS recommends a minimum 6-inch clearance around the top side and rear exhaust grillwork.

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6. Installing Modules and System Bring-up

TopicsMain Hardware Components Recommended Order for Installing Chassis Components Rack Mounting the C4 CMTS Power Conditioning Module (PCM) and Cabling Installing Modules in the C4 CMTS System Control Module (SCM) Fabric Control Module (FCM) Fast Ethernet Network Access Module (NAM) Gigabit Ethernet Network Access Module Cable Access Module (1Dx8U CAM) Cable Access Module (2Dx12U CAM) Initial System Configuration

Page2 6 8 9 17 21 28 31 34 41 46 51



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6 Installing Modules and System Bring-up

IntroductionThe following section lists the recommended order of installation for rack mounting the C4 CMTS and installing the various modules and components. Please read through this chapter and become familiar with the order of operation before you begin. This chapter also includes procedures necessary for a minimal system configuration and bring-up. The minimal configuration consists of one SCM, one FCM, one FastEthernet NAM or GigabitEthernet NAM, and one 1Dx8U CAM or 2Dx12U CAM.

Main Hardware ComponentsThe C4 CMTS base system contains the following components: Chassis Configuration CMTS chassis Two Power Conditioning Modules (PCMs) Power Feed A & Power Feed B Cable Access Module (1Dx8U or 2Dx12U) and associated Physical Interface Card (PIC) Network Access Module (FastE or GigE) and associated PIC Fabric Control Module (there is no FCM PIC) System Control Module and associated PIC Three fan modules (numbered 0, 1, and 2). Each fan module contains two fans, marked front and rear Air filter (factory installed)

There are various ways to equip a chassis. CAM configurations are dependent on the configuration of the cable plant of the subscriber network. The module faceplate in each slot includes a label stating the module type and multiple LEDs to indicate the modules status. When operational, the Power On LED is lit, shows a steady green, and the OOS display is off. When out-of-service, the Out-of-Service LED is lit. The OOS LED glows a steady red to indicate failure and flashes red to indicate self-test, diagnostics in progress, or downloading software.

LED Description

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Module Types and Chassis SlotsFront ViewThe C4 CMTS chassis contains twenty-one vertical slots labeled 0-20. These slots are equipped for the following modules (or sometimes referred to as front cards): One or two System Control Modules One or two Fabric Control Modules One to four Fast Ethernet Network Access Modules or one or two Gigabit Ethernet Network Access Modules One to sixteen Cable Access Modules (1Dx8U or 2Dx12U)

Following is an illustration of the front of the chassis.

Figure 6-1: Front View of C4 CMTS


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Cadant C4 CMTS User Documentation (Release 4.2 Standard)

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