Cisco CBR 8 Manuale utente

Cisco cBR Series Converged Broadband Routers Quality of Services

Configuration Guide for Cisco IOS XE Fuji 16.7.x

First Published: 2017-11-23

Americas Headquarters

Cisco Systems, Inc.

170 West Tasman Drive

San Jose, CA 95134-1706

USA

http://www.cisco.com

Tel: 408 526-4000

800 553-NETS (6387)

Fax: 408 527-0883

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

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

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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

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

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Contents

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

Fuji 16.7.x

Contents

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