Cisco Catalyst 8500 Series Edge Platforms Configuration Guide

IP Multicast: PIM Configuration Guide, Cisco IOS XE Bengaluru 17.4.x

| Cisco Catalyst 8000 Edge Platforms

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CONTENTS

Read Me First 1

CHAPTER 1

IP Multicast Technology Overview 3

CHAPTER 2

Finding Feature Information 3

Information About IP Multicast Technology 3

Role of IP Multicast in Information Delivery 3

Multicast Group Transmission Scheme 4

IP Multicast Routing Protocols 6

IP Multicast Group Addressing 6

IP Class D Addresses 6

IP Multicast Address Scoping 7

Layer 2 Multicast Addresses 8

IP Multicast Delivery Modes 8

Any Source Multicast 8

Source Specific Multicast 9

Protocol Independent Multicast 9

PIM Dense Mode 9

PIM Sparse Mode 10

Sparse-Dense Mode 11

Bidirectional PIM 11

Multicast Group Modes 12

Bidirectional Mode 12

Sparse Mode 12

Dense Mode 12

Rendezvous Points 13

Auto-RP 13

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Sparse-Dense Mode for Auto-RP 14

Bootstrap Router 14

Multicast Source Discovery Protocol 14

Anycast RP 15

Multicast Forwarding 16

Multicast Distribution Source Tree 16

Multicast Distribution Shared Tree 17

Source Tree Advantage 17

Shared Tree Advantage 18

Reverse Path Forwarding 18

RPF Check 18

PIM Dense Mode Fallback 19

Guidelines for Choosing a PIM Mode 21

Where to Go Next 21

Additional References 21

Feature Information for IP Multicast Technology Overview 22

Glossary 22

Configuring Basic IP Multicast 25

CHAPTER 3

Finding Feature Information 25

Prerequisites for Configuring Basic IP Multicast 25

Information About Configuring Basic IP Multicast 26

Auto-RP Overview 26

The Role of Auto-RP in a PIM Network 26

IP Multicast Boundary 26

Benefits of Auto-RP in a PIM Network 27

Anycast RP Overview 27

BSR Overview 27

BSR Election and Functionality 27

BSR Border Interface 28

Static RP Overview 28

SSM Overview 28

SSM Components 29

How SSM Differs from Internet Standard Multicast 29

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SSM Operations 29

IGMPv3 Host Signaling 30

Benefits of Source Specific Multicast 30

Bidir-PIM Overview 31

Multicast Group Modes 31

Bidirectional Shared Tree 32

DF Election 33

Bidirectional Group Tree Building 33

Packet Forwarding 34

Benefits of Bidirectional PIM 34

How to Configure Basic IP Multicast 34

Configuring Sparse Mode with Auto-RP 34

What to Do Next 39

Configuring Sparse Mode with Anycast RP 39

What to Do Next 41

Configuring Sparse Mode with a Bootstrap Router 41

What to Do Next 46

Configuring Sparse Mode with a Single Static RP(CLI) 46

What to Do Next 48

Configuring Source Specific Multicast 48

What to Do Next 50

Configuring Bidirectional PIM 50

Configuration Examples for Basic IP Multicast 52

Example: Sparse Mode with Auto-RP 52

Sparse Mode with Anycast RP Example 52

Sparse Mode with Bootstrap Router Example 54

BSR and RFC 2362 Interoperable Candidate RP Example 54

Example: Sparse Mode with a Single Static RP 55

SSM with IGMPv3 Example 55

SSM Filtering Example 56

Bidir-PIM Example 56

Additional References 57

Feature Information for Configuring Basic IP Multicast in IPv4 Networks 58

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Configuring Basic IP Multicast in IPv6 Networks 59

CHAPTER 4

Finding Feature Information 59

Prerequisites for Configuring Basic IP Multicast 59

Information About Configuring Basic IP Multicast in IPv6 Networks 60

IPv6 Multicast 60

IPv6 Multicast Overview 60

IPv6 Multicast Addressing 60

IPv6 Multicast Groups 62

Scoped Address Architecture 62

MRIB 63

IPv6 Multicast Process Switching and Fast Switching 63

IPv6 Anycast RP Solution 64

PIMv6 Anycast RP Solution Overview 64

PIMv6 Anycast RP Normal Operation 64

PIMv6 Anycast RP Failover 65

IPv6 BSR 66

IPv6 BSR: Configure RP Mapping 66

IPv6 BSR: Scoped Zone Support 66

IPv6 Multicast: RPF Flooding of BSR Packets 67

IPv6 Multicast Groups 67

IPv6 Multicast Address Group Range Support 67

How to Configure Basic IP Multicast in IPv6 Networks 68

Enabling IPv6 Multicast Routing 68

Disabling the Device from Receiving Unauthenticated Multicast Traffic 68

Troubleshooting IPv6 Multicast 69

Configuring PIMv6 Anycast RP 71

Configuring a BSR and Verifying BSR Information 74

Sending PIM RP Advertisements to the BSR 75

Configuring BSR for Use Within Scoped Zones 76

Configuring BSR Devices to Announce Scope-to-RP Mappings 77

Configuration Examples for Configuring IP Multicast Basic in IPv6 Networks 78

Example: Enabling IPv6 Multicast Routing 78

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Examples: Disabling IPv6 Multicast Address Group Range Support 78

Example: Verifying IPv6 MRIB Information 79

Example: Configuring PIMv6 Anycast RP 79

Example: Configuring a BSR 80

Additional References 80

Feature Information for Configuring Basic IP Multicast in IPv6 Networks 81

Using MSDP to Interconnect Multiple PIM-SM Domains 85

CHAPTER 5

Finding Feature Information 85

85

Information About Using MSDP to Interconnect Multiple PIM-SM Domains 85

Benefits of Using MSDP to Interconnect Multiple PIM-SM Domains 85

Use of MSDP to Interconnect Multiple PIM-SM Domains 86

MSDP Message Types 88

SA Messages 88

SA Request Messages 89

SA Response Messages 89

Keepalive Messages 89

SA Message Origination Receipt and Processing 89

SA Message Origination 89

SA Message Receipt 89

SA Message Processing 92

MSDP Peers 92

MSDP MD5 Password Authentication 92

How MSDP MD5 Password Authentication Works 93

Benefits of MSDP MD5 Password Authentication 93

SA Message Limits 93

MSDP Keepalive and Hold-Time Intervals 93

MSDP Connection-Retry Interval 94

MSDP Compliance with IETF RFC 3618 94

Benefits of MSDP Compliance with RFC 3618 94

Default MSDP Peers 95

MSDP Mesh Groups 96

Benefits of MSDP Mesh Groups 96

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SA Origination Filters 97

Use of Outgoing Filter Lists in MSDP 97

Use of Incoming Filter Lists in MSDP 98

TTL Thresholds in MSDP 99

SA Request Messages 99

SA Request Filters 99

MSDP MIB 100

How to Use MSDP to Interconnect Multiple PIM-SM Domains 100

Configuring an MSDP Peer 100

Shutting Down an MSDP Peer 101

Configuring MSDP MD5 Password Authentication Between MSDP Peers 102

Troubleshooting Tips 103

Preventing DoS Attacks by Limiting the Number of SA Messages Allowed in the SA Cache from

Specified MSDP Peers 104

Adjusting the MSDP Keepalive and Hold-Time Intervals 105

Adjusting the MSDP Connection-Retry Interval 106

Configuring MSDP Compliance with IETF RFC 3618 107

Configuring a Default MSDP Peer 108

Configuring an MSDP Mesh Group 109

Controlling SA Messages Originated by an RP for Local Sources 110

Controlling the Forwarding of SA Messages to MSDP Peers Using Outgoing Filter Lists 111

Controlling the Receipt of SA Messages from MSDP Peers Using Incoming Filter Lists 112

Using TTL Thresholds to Limit the Multicast Data Sent in SA Messages 113

Requesting Source Information from MSDP Peers 114

Controlling the Response to Outgoing SA Request Messages from MSDP Peers Using SA Request

Filters 115

Including a Bordering PIM Dense Mode Region in MSDP 116

Configuring an Originating Address Other Than the RP Address 117

Monitoring MSDP 118

Clearing MSDP Connections Statistics and SA Cache Entries 120

Enabling SNMP Monitoring of MSDP 121

Troubleshooting Tips 122

Configuration Examples for Using MSDP to Interconnect Multiple PIM-SM Domains 122

Example: Configuring an MSDP Peer 122

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Example: Configuring MSDP MD5 Password Authentication 123

Configuring MSDP Compliance with IETF RFC 3618 Example 123

Configuring a Default MSDP Peer Example 124

Example: Configuring MSDP Mesh Groups 125

Additional References 125

Feature Information for Using MSDP to Interconnect Multiple PIM-SM Domains 126

PIM Allow RP 129

CHAPTER 6

Finding Feature Information 129

Restrictions for PIM Allow RP 129

Information About PIM Allow RP 130

Rendezvous Points 130

PIM Allow RP 130

How to Configure PIM Allow RP 131

Configuring RPs for PIM-SM 131

Enabling PIM Allow RP 133

Displaying Information About PIM-SM and RPs 134

Configuration Examples for PIM Allow RP 135

Example: IPv4 PIM Allow RP 135

Example: IPv6 PIM Allow RP 136

Additional References for PIM Allow RP 138

Feature Information for PIM Allow RP 138

Configuring Source Specific Multicast 139

CHAPTER 7

Finding Feature Information 139

Restrictions for Source Specific Multicast 139

Information About Source Specific Multicast 141

SSM Overview 141

SSM Components 141

How SSM Differs from Internet Standard Multicast 141

SSM Operations 142

IGMPv3 Host Signaling 143

Benefits of 143

IGMP v3lite Host Signalling 144

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URD Host Signalling 145

How to Configure Source Specific Multicast 147

Configuring SSM 147

Configuration Examples of Source Specific Multicast 148

SSM with IGMPv3 Example 148

SSM with IGMP v3lite and URD Example 148

SSM Filtering Example 148

Additional References 149

Feature Information for Source Specific Multicast 150

Tunneling to Connect Non-IP Multicast Areas 153

CHAPTER 8

Finding Feature Information 153

Prerequisites for Tunneling to Connect Non-IP Multicast Areas 153

Information About Tunneling to Connect Non-IP Multicast Areas 153

Benefits of Tunneling to Connect Non-IP Multicast Areas 153

IP Multicast Static Route 154

How to Connect Non-IP Multicast Areas 154

Configuring a Tunnel to Connect Non-IP Multicast Areas 154

Configuration Examples for Tunneling to Connect Non-IP Multicast Areas 157

Tunneling to Connect Non-IP Multicast Areas Example 157

Additional References 160

Feature Information for Tunneling to Connect Non-IP Multicast Areas 161

Automatic Multicast Tunneling 163

CHAPTER 9

Finding Feature Information 163

Restrictions for Automatic Multicast Tunneling 163

Information About Automatic Multicast Tunneling 164

Overview 164

Automatic Multicast Tunneling Message Exchanges 164

AMT Tunnel and Traffic Types 165

Advantages of Automatic Multicast Tunneling 165

Prerequisites for AMT 165

Configuration Recommendations for AMT 166

How to Configure Automatic Multicast Tunneling 166

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Enabling and Configuring Automatic Multicast Tunneling on a Relay 166

Enabling and Configuring Automatic Multicast Tunneling on Gateway 168

Displaying and Verifying AMT Configuration 171

Displaying and Verifying AMT Relay Configuration 173

Displaying and Verifying AMT Gateway Configuration 176

Configuration Examples for Automatic Multicast Tunneling 178

Example: AMT Relay Configuration 178

Example: AMT Gateway Configuration 178

Additional References for Automatic Multicast Tunneling 179

Feature Information for Automatic Multicast Tunneling 179

BFD Support for Multicast (PIM) 181

CHAPTER 10

Restrictions for BFD Support for Multicast (PIM) 181

Information About BFD Support for Multicast (PIM) 181

PIM BFD 181

How to Configure BFD Support for Multicast (PIM) 182

Enabling BFD PIM on an Interface 182

Configuration Examples for BFD Support for Multicast (PIM) 183

Additional References for BFD Support for Multicast (PIM) 183

Feature Information for BFD Support for Multicast (PIM) 184

HSRP Aware PIM 185

CHAPTER 11

Finding Feature Information 185

Restrictions for HSRP Aware PIM 185

Information About HSRP Aware PIM 186

HSRP 186

HSRP Aware PIM 186

How to Configure HSRP Aware PIM 187

Configuring an HSRP Group on an Interface 187

Configuring PIM Redundancy 189

Configuration Examples for HSRP Aware PIM 190

Example: Configuring an HSRP Group on an Interface 190

Example: Configuring PIM Redundancy 190

Additional References for HSRP Aware PIM 191

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Feature Information for HSRP Aware PIM 191

VRRP Aware PIM 193

CHAPTER 12

Finding Feature Information 193

Restrictions for VRRP Aware PIM 193

Information About VRRP Aware PIM 194

Overview of VRRP Aware PIM 194

How to Configure VRRP Aware PIM 194

Configuring VRRP Aware PIM 194

Configuration Examples for VRRP Aware PIM 196

Example: VRRP Aware PIM 196

Additional References for VRRP Aware PIM 197

Feature Information for VRRP Aware PIM 197

Verifying IP Multicast Operation 199

CHAPTER 13

Finding Feature Information 199

Prerequisites for Verifying IP Multicast Operation 199

Restrictions for Verifying IP Multicast Operation 200

Information About Verifying IP Multicast Operation 200

Guidelines for Verifying IP Multicast Operation in a PIM-SM and PIM-SSM Network Environment

200

Common Commands Used to Verify IP Multicast Operation on the Last Hop Router for PIM-SM

and PIM-SSM 200

Common Commands Used to Verify IP Multicast Operation on Routers Along the SPT for PIM-SM

and PIM-SSM 201

Common Commands Used to Verify IP Multicast Operation on the First Hop Router for PIM-SM

and PIM-SSM 202

How to Verify IP Multicast Operation 202

Using PIM-Enabled Routers to Test IP Multicast Reachability 202

Configuring Routers to Respond to Multicast Pings 202

Pinging Routers Configured to Respond to Multicast Pings 203

Verifying IP Multicast Operation in a PIM-SM or a PIM-SSM Network 203

Verifying IP Multicast Operation on the Last Hop Router 204

Verifying IP Multicast on Routers Along the SPT 207

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Verifying IP Multicast on the First Hop Router 209

Configuration Examples for Verifying IP Multicast Operation 210

Verifying IP Multicast Operation in a PIM-SM or PIM-SSM Network Example 210

Verifying IP Multicast on the Last Hop Router Example 211

Verifying IP Multicast on Routers Along the SPT Example 214

Verifying IP Multicast on the First Hop Router Example 214

Additional References 215

Feature Information for Verifying IP Multicast Operation 216

Monitoring and Maintaining IP Multicast 217

CHAPTER 14

Finding Feature Information 218

Prerequisites for Monitoring and Maintaining IP Multicast 218

Information About Monitoring and Maintaining IP Multicast 218

IP Multicast Heartbeat 218

Session Announcement Protocol (SAP) 219

PIM MIB Extensions for SNMP Traps for IP Multicast 219

Benefits of PIM MIB Extensions 220

How to Monitor and Maintain IP Multicast 220

Displaying Multicast Peers Packet Rates and Loss Information and Tracing a Path 220

Displaying IP Multicast System and Network Statistics 221

Clearing IP Multicast Routing Table or Caches 222

Monitoring IP Multicast Delivery Using IP Multicast Heartbeat 223

Advertising Multicast Multimedia Sessions Using SAP Listener 224

Disabling Fast Switching of IP Multicast 226

Enabling PIM MIB Extensions for IP Multicast 227

Configuration Examples for Monitoring and Maintaining IP Multicast 228

Displaying IP Multicast System and Network Statistics Example 228

Monitoring IP Multicast Delivery Using IP Multicast Heartbeat Example 229

Advertising Multicast Multimedia Sessions Using SAP Listener Example 229

Displaying IP Multicast System and Network Statistics Example 230

Enabling PIM MIB Extensions for IP Multicast Example 232

Additional References 232

Feature Information for Monitoring and Maintaining IP Multicast 233

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Multicast User Authentication and Profile Support 235

CHAPTER 15

Finding Feature Information 235

Restrictions for Multicast User Authentication and Profile Support 235

Information About Multicast User Authentication and Profile Support 236

IPv6 Multicast User Authentication and Profile Support 236

How to Configure Multicast User Authentication and Profile Support 236

Enabling AAA Access Control for IPv6 Multicast 236

Specifying Method Lists and Enabling Multicast Accounting 237

Disabling the Device from Receiving Unauthenticated Multicast Traffic 238

Configuration Examples for Multicast User Authentication and Profile Support 239

Example: Enabling AAA Access Control, Specifying Method Lists, and Enabling Multicast Accounting

for IPv6 239

Additional References for IPv6 Services: AAAA DNS Lookups 239

Feature Information for Multicast User Authentication and Profile Support 240

IPv6 Multicast: Bootstrap Router 243

CHAPTER 16

Finding Feature Information 243

Information About IPv6 Multicast: Bootstrap Router 243

IPv6 BSR 243

IPv6 BSR: Configure RP Mapping 244

IPv6 BSR: Scoped Zone Support 244

IPv6 Multicast: RPF Flooding of BSR Packets 245

How to Configure IPv6 Multicast: Bootstrap Router 245

Configuring a BSR and Verifying BSR Information 245

Sending PIM RP Advertisements to the BSR 246

Configuring BSR for Use Within Scoped Zones 247

Configuring BSR Devices to Announce Scope-to-RP Mappings 248

Configuration Examples for IPv6 Multicast: Bootstrap Router 249

Example: Configuring a BSR 249

Additional References 249

Feature Information for IPv6 Multicast: Bootstrap Router 250

IPv6 Multicast: PIM Sparse Mode 253

CHAPTER 17

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Finding Feature Information 253

Information About IPv6 Multicast PIM Sparse Mode 253

Protocol Independent Multicast 253

PIM-Sparse Mode 254

How to Configure IPv6 Multicast PIM Sparse Mode 258

Enabling IPv6 Multicast Routing 258

Configuring PIM-SM and Displaying PIM-SM Information for a Group Range 258

Configuring PIM Options 260

Resetting the PIM Traffic Counters 262

Turning Off IPv6 PIM on a Specified Interface 262

Configuration Examples for IPv6 Multicast PIM Sparse Mode 263

Example: Enabling IPv6 Multicast Routing 263

Example: Configuring PIM 263

Example: Displaying IPv6 PIM Topology Information 264

Example: Displaying PIM-SM Information for a Group Range 264

Example: Configuring PIM Options 265

Example: Displaying Information About PIM Traffic 265

Additional References 266

Feature Information for IPv6 Multicast PIM Sparse Mode 267

IPv6 Multicast: Static Multicast Routing for IPv6 269

CHAPTER 18

Finding Feature Information 269

Information About IPv6 Static Mroutes 269

How to Configure IPv6 Static Multicast Routes 270

Configuring Static Mroutes 270

Configuration Examples for IPv6 Static Multicast Routes 271

Example: Configuring Static Mroutes 271

Additional References 272

Feature Information for IPv6 Multicast: Static Multicast Routing for IPv6 273

IPv6 Multicast: PIM Source-Specific Multicast 275

CHAPTER 19

Finding Feature Information 275

Prerequisites for IPv6 Multicast: PIM Source-Specific Multicast 275

Information About IPv6 Multicast: PIM Source-Specific Multicast 276

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IPv6 Multicast Routing Implementation 276

Protocol Independent Multicast 276

PIM-Source Specific Multicast 277

How to Configure IPv6 Multicast: PIM Source-Specific Multicast 279

Configuring PIM Options 279

Resetting the PIM Traffic Counters 281

Clearing the PIM Topology Table to Reset the MRIB Connection 281

Configuration Examples for IPv6 Multicast: PIM Source-Specific Multicast 283

Example: Displaying IPv6 PIM Topology Information 283

Example: Configuring Join/Prune Aggregation 284

Example: Displaying Information About PIM Traffic 284

Additional References 284

Feature Information for IPv6 Multicast: PIM Source-Specific Multicast 285

IPv6 Source Specific Multicast Mapping 287

CHAPTER 20

Finding Feature Information 287

Information About IPv6 Source Specific Multicast Mapping 287

How to Configure IPv6 Source Specific Multicast Mapping 288

Configuring IPv6 SSM 288

Configuration Examples for IPv6 Source Specific Multicast Mapping 289

Example: IPv6 SSM Mapping 289

Additional References 290

Feature Information for IPv6 Source Specific Multicast Mapping 291

IPv6 Multicast: Explicit Tracking of Receivers 293

CHAPTER 21

Finding Feature Information 293

Information About IPv6 Multicast Explicit Tracking of Receivers 293

Explicit Tracking of Receivers 293

How to Configure IPv6 Multicast Explicit Tracking of Receivers 293

Configuring Explicit Tracking of Receivers to Track Host Behavior 293

Configuration Examples for IPv6 Multicast Explicit Tracking of Receivers 294

Example: Configuring Explicit Tracking of Receivers 294

Additional References 295

Feature Information for IPv6 Multicast: Explicit Tracking of Receivers 296

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IPv6 Bidirectional PIM 297

CHAPTER 22

Finding Feature Information 297

Restrictions for IPv6 Bidirectional PIM 297

Information About IPv6 Bidirectional PIM 297

Bidirectional PIM 297

How to Configure IPv6 Bidirectional PIM 298

Configuring Bidirectional PIM and Displaying Bidirectional PIM Information 298

Configuration Examples for IPv6 Bidirectional PIM 299

Example: Configuring Bidirectional PIM and Displaying Bidirectional PIM Information 299

Additional References 300

Feature Information for IPv6 Bidirectional PIM 301

IPv6 PIM Passive Mode 303

CHAPTER 23

Finding Feature Information 303

Information About IPv6 PIM Passive Mode 303

How to Configure IPv6 PIM Passive Mode 303

Additional References 305

Feature Information for IPv6 PIM Passive 306

IPv6 Multicast: Routable Address Hello Option 307

CHAPTER 24

Finding Feature Information 307

Information About the Routable Address Hello Option 307

How to Configure IPv6 Multicast: Routable Address Hello Option 308

Configuring the Routable Address Hello Option 308

Configuration Example for the Routable Address Hello Option 309

Additional References 309

Feature Information for IPv6 Multicast: Routable Address Hello Option 310

PIMv6 Anycast RP Solution 311

CHAPTER 25

Finding Feature Information 311

Information About the PIMv6 Anycast RP Solution 311

PIMv6 Anycast RP Solution Overview 311

PIMv6 Anycast RP Normal Operation 312

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PIMv6 Anycast RP Failover 312

How to Configure the PIMv6 Anycast RP Solution 313

Configuring PIMv6 Anycast RP 313

Configuration Examples for the PIMv6 Anycast RP Solution 316

Example: Configuring PIMv6 Anycast RP 316

Additional References 317

Feature Information for PIMv6 Anycast RP Solution 317

MTR in VRF 319

CHAPTER 26

Finding Feature Information 319

Information About MTR in VRF 319

MTR in VRF Overview 319

How to Configure VRF in MTR 320

Configuring MTR in VRF 320

Configuring Examples for MTR in VRF 322

Example for MTR in VRF 322

Additional References for MTR in VRF 323

Feature Information for MTR in VRF 323

Configuring IP Multicast Over Unidirectional Links 325

CHAPTER 27

Information About IP Multicast over UDL 325

Prerquisites for Multicast Over UDL 327

Restrictions for Multicast Over UDL 327

How to Configure Multicast Over UDL 327

Verifying Multicast Over UDL Configuration 328

Verifying Multicast Over UDL Configuration 330

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CHAPTER 1

Read Me First

Important Information about Cisco IOS XE 16

Effective Cisco IOS XE Release 3.7.0E for Catalyst Switching and Cisco IOS XE Release 3.17S (for Access

and Edge Routing) the two releases evolve (merge) into a single version of converged release—the Cisco IOS

XE 16—providing one release covering the extensive range of access and edge products in the Switching and

Routing portfolio.

Feature Information

Use Cisco Feature Navigator to find information about feature support, platform support, and Cisco software

image support. An account on Cisco.com is not required.

Related References

•Cisco IOS Command References, All Releases

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