Cisco uBR10-SRP-OC12SML Specifications Page 96
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Cisco uBR10012 Universal Broadband Router Software Configuration Guide
OL-1520-08
Chapter1 Overview of CiscouBR10012 Universal Broadband Router Software
Supported Software Features for the CiscouBR10012 Router
Spectrum Management
Spectrum management is a software and hardware feature provided in the CMTS so that the CMTS may
sense both downstream and upstream plant impairments, report them to a management entity, and
automatically mitigate them where possible. Spectrum management provides many capabilities that are
described further in the Cisco Cable Modem Termination System Feature Guide.
Advanced Spectrum Management Support on the Cisco uBR10012 CMTS
Cisco IOS release 12.3(13a)BC introduces Advanced Spectrum Management for the Cisco uBR10012
router, with the following enhancements:
• Supports additional software functionality for the Cisco uBR10-LCP2-MC16C/E/S cable interface
line card and the Cisco MC5x20S/U broadband processing engine.
• Supports spectrum analyzer functionality.
• Supports proactive channel management and hopping decisions, so as to avoid the negative impact
of ingress noise, and to maintain uninterrupted subscriber service.
• Offers flexible configuration choices, allowing MSOs to determine the priority of the actions to be
taken when ingress noise on the upstream channel exceeds the allowable thresholds. The
configurable actions are frequency hopping, switching the modulation profile, and reducing the
channel width.
• Performs Cisco Network Registrar (CNR) calculations using DSP algorithms in real-time on a
per-interface and a per-modem basis.
• Intelligently determines when to modify the frequency, channel width, or modulation profile, based
on CNR calculations in the active channel, the number of missed station maintenance polls, and the
number of correctable or non-correctable Forward Error Correction (FEC) errors. Previously,
channel hopping occurred when the number of missed station maintenance polls exceeded a
user-defined threshold or the SNR reported by the Broadcom chip exceeded the DOCSIS thresholds.
• Enhances the Dynamic Upstream Modulation feature for the Cisco uBR-MC16S line card. This
feature supports dynamic modulation using two upstream profiles. The primary profile (typically
using 16-QAM or a mixed modulation profile) remains in effect at low noise conditions, but if
upstream conditions worsen, the cable modems switch to the secondary profile (typically using
QPSK modulation) to avoid going offline. When the noise conditions improve, the modems are
moved back to the primary profile.
Commands for Enhanced Spectrum Management
A variety of commands for enhanced spectrum management now provide new options.
• cable upstream n threshold cnr-profile1 threshold1-in-dB cnr-profile2 threshold2-in-dB
corr-fec fec-corrected uncorr-fec fec-uncorrected
• cable upstream n upstream threshold snr-profiles threshold1-in-dB threshold2-in-dB
• cable upstream n threshold corr-fec corrfec-threshold
• cable upstream n threshold uncorr-fec uncorrfec-threshold
• show cable hop n upstream history
• show cable hop n upstream threshold
- Text Part Number: OL-1520-08 1
- CONTENTS 3
- Contents 4
- Document Revision History 9
- Audience 10
- Document Organization 10
- Conventions 11
- Terms and Acronyms 12
- OL-1520-06 13
- Additional References 14
- Standards 15
- Obtaining Documentation 16
- Ordering Documentation 17
- Documentation Feedback 17
- Cisco.com 17
- Technical Assistance Center 18
- Cisco TAC Escalation Center 19
- Broadband Router Software 21
- Operational Overview 22
- Cisco IOS Software Location 22
- DOCSIS 1.1 Feature Support 31
- High Availability Features 31
- Intercept Features 32
- IP Routing Features 32
- Management Features 32
- AutoInstall 35
- Cisco Network Registrar 35
- Extended Setup Facility 35
- Integrated DHCP Server 37
- DOCSIS 1.0 Feature Support 38
- DOCSIS 1.0 MAC Driver 40
- DOCSIS 1.0 Multi SID Support 42
- DOCSIS 1.0 ToS Overwrite 44
- DOCSIS 1.0+ Feature Support 47
- Additional Information 48
- DOCSIS 1.1 CM Compatibility 50
- Commands 51
- DOCSIS 1.1 MAC Scheduler 53
- Basic Wiretap Support 67
- Cable Monitor Enhancements 67
- Additional COPS Information 71
- Packet Intercept 73
- PXF ARP Filter 73
- PXF Divert Rate Limiting 73
- IP Broadcast Echo 75
- IP Multicast Echo 75
- SSM Mapping 76
- • Cable ARP Filtering 78
- Integrated Time-of-Day Server 79
- Cable Interface Bundling 82
- CNEM Compliance 82
- Broadband Internet Access 82
- DOCSIS 2.0 SAMIS ECR Data Set 83
- Changes from Cisco DSG 1.0 84
- Prerequisites for DSG 1.1 85
- Downstream Frequency Override 86
- Dynamic Modulation Profiles 87
- Dynamic Upstream Modulation 88
- CISCO-CABLE-METERING-MIB 89
- CISCO-CABLE-QOS-MONITOR MIB 90
- CISCO-CABLE-SPECTRUM-MIB 90
- CISCO-ENHANCED-MEMPOOL-MIB 91
- CISCO-PROCESS-MIB 91
- DOCS-QOS-MIB 91
- DSG-IF-MIB 91
- Restrictions 92
- • debug cable range 94
- Spectrum Management 96
- Statistical Counters 97
- Usage Based Billing (SAMIS) 98
- PacketCable 1.0 With CALEA 99
- OL-1520-08 104
- Security Features 105
- Address Verification 106
- CM Transmission Burst Size 106
- Dynamic Ranging 108
- Flap List Support 109
- Virtual Interfaces 110
- VLAN Features 112
- IPv6 over L2VPN 113
- MPLS-VPN Network Support 113
- • TLS for the Cisco CMTS 117
- System for the First Time 119
- Preparing for Configuration 120
- Fundamentals 121
- OL-1520-05 122
- Configuring Global Parameters 126
- Configuration Mode 131
- MAC-Layer Addressing 132
- Identifying CM Line Cards 133
- CiscouBR10012Router 137
- Verifying ARP Requests 140
- Activating Downstream Ports 141
- Activating the Upstream Ports 150
- Verifying the Upstream Ports 151
- Troubleshooting Tips 161
- no cable proxy-arp 163
- Setting IP Multicast Echo 164
- Verifying IP Multicast Echo 164
- Setting IP Broadcast Echo 165
- Verifying IP Broadcast Echo 165
- Fiber-Coaxial Network 175
- Activating CM Authentication 176
- Verify CM Authentication 177
- Clearing CM Counters 179
- Clearing CM Reset 180
- Configuring Per-Modem Filters 183
- Troubleshooting the System 193
- : 1624 197
- Configuring PRBS Test Signals 207
- Verifying Test Signal Output 207
- Pinging Unresponsive CMs 208
- DOCSIS Specification Summary 213
- • Regional processing centers 214
- • Headends 214
- CMTS Traffic Engineering 217
- Configuration Bit Meanings 221
- Bits 0–3 222
- Bit 10 and Bit 14 224
- Bit 11 and Bit 12 224
- OL-1520-04 229
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