Cisco cBR 8 User manual

Cisco cBR Series Converged Broadband Routers Quality of Services
Configuration Guide for Cisco IOS XE Fuji 16.7.x
First Published: 2017-11-23
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©2017 Cisco Systems, Inc. All rights reserved.

CONTENTS
CHAPTER 1 Dynamic Bandwidth Sharing 1
Hardware Compatibility Matrix for Cisco cBR Series Routers 1
Information About Dynamic Bandwidth Sharing 2
How to Configure Dynamic Bandwidth Sharing 2
Configuring DBS for a Wideband Cable Interface 3
Configuring DBS for an Integrated Cable Interface 3
Verifying the Dynamic Bandwidth Sharing Configuration 4
Additional References 7
Feature Information for Dynamic Bandwidth Sharing 7
CHAPTER 2 Modular Quality of Service Command-Line Interface QoS 9
Finding Feature Information 9
Hardware Compatibility Matrix for Cisco cBR Series Routers 10
Restrictions for Applying QoS Features Using the MQC 10
About 11
The MQC Structure 11
Elements of a Traffic Class 11
Elements of a Traffic Policy 13
Nested Traffic Classes 15
match-all and match-any Keywords of the class-map Command 16
input and output Keywords of the service-policy Command 16
Benefits of Applying QoS Features Using the MQC 17
How to Apply QoS Features Using the MQC 17
Creating a Traffic Class 17
Creating a Traffic Policy 18
Attaching a Traffic Policy to an Interface Using the MQC 19
Verifying the Traffic Class and Traffic Policy Information 20
Configuration Examples for Applying QoS Features Using the MQC 21
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Creating a Traffic Class 21
Creating a Policy Map 22
Example: Attaching a Traffic Policy to an Interface 22
Using the match not Command 22
Configuring a Default Traffic Class 23
How Commands "class-map match-any" and "class-map match-all" Differ 23
Establishing Traffic Class as a Match Criterion (Nested Traffic Classes) 24
Example: Nested Traffic Class for Maintenance 24
Example: Nested Traffic Class to Combine match-any and match-all Characteristics
in One Traffic Class 24
Example: Traffic Policy as a QoS Policy (Hierarchical Traffic Policies) 25
How to Configure Input MQC on the Port-Channel Interfaces 25
Creating a Traffic Class 26
Creating a Policy Map 26
Defining QoS Actions in a Policy Map 26
Set Actions 27
Configuring Aggregate Port-Channel Interface 27
Attaching a Traffic Policy to an Interface 27
Example: Configuring Input MQC on the Port-Channel Interfaces 27
Additional References 28
Feature Information for Modular Quality of Service Command-Line Interface QoS 28
CHAPTER 3 DOCSIS 1.1 for the Cisco CMTS Routers 31
Hardware Compatibility Matrix for Cisco cBR Series Routers 32
Prerequisites for DOCSIS 1.1 Operations 32
Restrictions for DOCSIS 1.1 Operations 33
Information about DOCSIS 1.1 35
Baseline Privacy Interface Plus 35
Concatenation 36
Dynamic MAC Messages 36
Enhanced Quality of Service 36
Fragmentation 37
Interoperability 37
Payload Header Suppression 38
Downstream ToS Overwrite 38
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Contents

DOCSIS 1.1 Quality of Service 38
Service Flow 38
Service Class 39
Packet Classifiers 40
Packet Header Suppression Rules 41
Quality of Service Comparison 41
DOCSIS 1.0 41
DOCSIS 1.0+ 42
Interoperability with Different Versions of DOCSIS Networks 42
Enhanced Rate Bandwidth Allocation (ERBA) Support for DOCSIS 1.0 Cable Modems 43
DOCSIS 3.0 Downstream Peak Traffic Rate TLV Support for ERBA 44
Suppressing Upstream and Downstream Peak Rate TLVs for pre DOCSIS 3.0 Cable
Modems 45
Downstream Classification Enhancement with MAC Addresses 45
Benefits 46
How to Configure the Cisco CMTS for DOCSIS 1.1 Operations 47
Configuring Baseline Privacy Interface 48
Downloading the DOCSIS Root Certificate to the CMTS 51
Adding a Manufacturer’s Certificate as a Trusted Certificate 53
Adding a Certificate as a Trusted Certificate Using the Command Line Interface 53
Adding a Certificate as a Trusted Certificate Using SNMP Commands 54
Adding a Manufacturer’s or CM Certificate to the Hotlist 55
Adding a Certificate to the Hotlist Using SNMP Commands 55
Enabling Concatenation 57
Enabling DOCSIS Fragmentation 58
Enabling DOCSIS 1.1 Downstream Maximum Transmit Burst on the Cisco cBR-8 Router 60
Monitoring DOCSIS Operations 61
Monitoring the DOCSIS Network 61
Displaying the Status of Cable Modems 61
Displaying a Summary Report for the Cable Modems 64
Displaying the Capabilities of the Cable Modems 64
Displaying Detailed Information About a Particular Cable Modem 64
Monitoring the RF Network and Cable Interfaces 64
Displaying Information About Cloned Cable Modems 65
Denying RF Access For Cable Modems 65
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Displaying Information About the Mac Scheduler 65
Displaying Information About QoS Parameter Sets 65
Displaying Information About Service Flows 65
Displaying Information About Service IDs 65
Monitoring BPI+ Operations 66
Displaying the Current BPI+ State of Cable Modems 66
Displaying the BPI+ Timer Values on the CMTS 67
Displaying the Certificate List on the CMTS 67
Configuration Examples for DOCSIS 1.1 Operations 68
Example: DOCSIS 1.1 Configuration for Cisco cBR-8 Router (with BPI+) 68
Additional References 71
Feature Information for DOCSIS 1.1 for Cisco CMTS Routers 71
CHAPTER 4 Default DOCSIS 1.0 ToS Overwrite 73
Hardware Compatibility Matrix for Cisco cBR Series Routers 73
Restrictions for Default DOCSIS 1.0 ToS Overwrite 74
Information About Default DOCSIS 1.0 ToS Overwrite 74
Default DOCSIS 1.0 ToS Overwrite Overview 75
DOCSIS 75
Type-of-Service (ToS) 75
How to Configure Default DOCSIS 1.0 ToS Overwrite 75
Enabling Default DOCSIS 1.0 ToS Overwrite 76
Editing QoS Profiles 77
Additional References 77
Feature Information for Default DOCSIS 1.0 ToS Overwrite 78
CHAPTER 5 DOCSIS WFQ Scheduler on the Cisco CMTS Routers 79
Hardware Compatibility Matrix for Cisco cBR Series Routers 80
Prerequisites for DOCSIS WFQ Scheduler 80
Restrictions for DOCSIS WFQ Scheduler 80
Information About DOCSIS WFQ Scheduler 81
Queue Types 82
Priority Queues 82
CIR Queues 82
Best Effort Queues 82
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DOCSIS QoS Support 83
Traffic Priority 83
Custom DOCSIS Priority to Excess Ratio Mappings 84
Maximum Sustained Traffic Rate 84
Minimum Reserved Traffic Rate 84
High Priority Traffic 84
Enhanced Rate Bandwidth Allocation 85
Peak Traffic Rate 85
DOCSIS 3.0 Downstream Bonding Support with Bonding Group Dynamic Bandwidth
Sharing 86
How to Configure DOCSIS WFQ Scheduler 86
Mapping DOCSIS Priority to Excess Ratio 87
Verifying the Downstream Queues Information 87
Additional References 88
Feature Information for DOCSIS WFQ Scheduler 88
CHAPTER 6 Fairness Across DOCSIS Interfaces 89
Hardware Compatibility Matrix for Cisco cBR Series Routers 90
Prerequisites for Fairness Across DOCSIS Interfaces 90
Restrictions for Fairness Across DOCSIS Interfaces 91
Information About Fairness Across DOCSIS Interfaces 91
On-demand CIR Acquisition 91
Fairness Across Bonding Groups 92
OFDM Channels 92
Interface Bandwidth 92
How to Configure Fairness Across DOCSIS Interfaces 92
Configuring Fairness Across DOCSIS Interfaces 92
Configuring Maximum Excess Information Rate Ratio 93
Configuring Constant Excess Information Rate Demand 94
Configuring Maximum Bonus Bandwidth 95
Verifying the Fairness Across DOCSIS Interfaces 96
Verifying Reservable Bandwidth 96
Verifying Global Fairness Across DOCSIS Interfaces Status and Statistics 97
Verifying Per-Controller Fairness Across DOCSIS Interfaces Status and Statistics 98
Verifying Per-Interface Fairness Across DOCSIS Interfaces Status and Statistics 98
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Configuration Examples for Fairness Across DOCSIS Interfaces 99
Example: Fairness Across DOCSIS Interfaces 99
Example: Maximum EIR Demand Ratio 99
Example: Constant EIR Demand 100
Example: Maximum Bonus Bandwidth 100
Additional References 101
Feature Information for Fairness Across DOCSIS Interfaces 101
CHAPTER 7 Service Group Admission Control 103
Finding Feature Information 103
Hardware Compatibility Matrix for Cisco cBR Series Routers 103
Restrictions for Service Group Admission Control 104
Information About Service Group Admission Control 104
Overview 104
SGAC and Downstream Bandwidth Utilization 105
Categorization of Service Flows 105
Thresholds for Downstream Bandwidth 106
Overview of Bonding Group Admission Control 106
How to Configure, Monitor, and Troubleshoot Service Group Admission Control 106
Defining Rules for Service Flow Categorization 106
Naming Application Buckets 109
Preempting High-Priority Emergency 911 Calls 109
Calculating Bandwidth Utilization 110
Enabling SGAC Check 111
Configuration Examples for SGAC 112
Example: SGAC Configuration Commands 112
Example: SGAC for Downstream Traffic 114
Additional References 114
Feature Information for Service Group Admission Control 116
CHAPTER 8 Subscriber Traffic Management 117
Hardware Compatibility Matrix for Cisco cBR Series Routers 118
Restrictions for Subscriber Traffic Management on the Cisco CMTS Routers 119
Information About Subscriber Traffic Management on the Cisco CMTS Routers 119
Feature Overview 120
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Feature List 120
Sliding Window for Monitoring Service Flows 121
Weekend Monitoring 122
SNMP Trap Notifications 122
Cable Modem Interaction with the Subscriber Traffic Management Feature 124
How to Configure the Subscriber Traffic Management Feature on the Cisco CMTS Routers 125
Creating and Configuring an Enforce-Rule 125
Examples 128
Example: Legacy Monitoring Configuration 128
Example: Peak-offpeak Monitoring Configuration 129
Configuring Weekend Monitoring 130
Prerequisites 130
Restrictions 130
Configuring Different Legacy Monitoring Conditions for Weekends 130
Configuring Different Peak-Offpeak Monitoring Conditions for Weekends 131
Disabling Weekend Monitoring 132
Removing Weekend Monitoring Conditions and Use the Same Monitoring Criteria Every
Day 133
Disabling an Enforce-Rule 133
Removing an Enforce-Rule 134
Changing a Cable Modem Service Class 135
Monitoring the Subscriber Traffic Management Feature on the Cisco CMTS Routers 136
Displaying the Currently Defined Enforce-Rules 136
Displaying the Current Subscriber Usage 138
Configuration Examples for Subscriber Traffic Management on the Cisco CMTS Routers 139
Example: DOCSIS Configuration File and STM Service Classes 139
Example: Downstream Configuration 140
Example: Upstream Configuration 140
Example: Downstream and Upstream Configuration 141
Example: Weekend Monitoring Configuration 141
Additional References 142
Feature Information for Subscriber Traffic Management 143
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Contents

Cisco cBR Series Converged Broadband Routers Quality of Services Configuration Guide for Cisco IOS XE
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Contents