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CONTENTS
Preface
Preface xxi
Document Conventions xxi
Related Documentation xxiii
Obtaining Documentation and Submitting a Service Request xxiii
CHAPTER 1
Using the Command-Line Interface 1
Information About Using the Command-Line Interface 1
Command Modes 1
Understanding Abbreviated Commands 3
No and Default Forms of Commands 3
CLI Error Messages 4
Configuration Logging 4
Using the Help System 4
How to Use the CLI to Configure Features 6
Configuring the Command History 6
Changing the Command History Buffer Size 6
Recalling Commands 6
Disabling the Command History Feature 7
Enabling and Disabling Editing Features 7
Editing Commands Through Keystrokes 8
Editing Command Lines That Wrap 9
Searching and Filtering Output of show and more Commands 10
Accessing the CLI 11
Accessing the CLI Through a Console Connection or Through Telnet 11
CHAPTER 2
Using the Web Graphical User Interface 13
Prerequisites for Using the Web GUI 13
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Information About Using The Web GUI 13
Web GUI Features 14
Connecting the Console Port of the Device 15
Logging On to the Web GUI 15
Enabling Web and Secure Web Modes 15
Configuring the Device Web GUI 16
CHAPTER 3
IP Multicast Routing Technology Overview 21
Finding Feature Information 21
Information About IP Multicast Technology 21
Role of IP Multicast in Information Delivery 21
IP Multicast Routing Protocols 22
Multicast Group Transmission Scheme 22
IP Multicast Boundary 24
IP Multicast Group Addressing 25
IP Class D Addresses 25
IP Multicast Address Scoping 25
Layer 2 Multicast Addresses 27
IP Multicast Delivery Modes 27
Source Specific Multicast 28
Additional References 28
CHAPTER 4
Configuring IGMP 31
Finding Feature Information 31
Prerequisites for IGMP and IGMP Snooping 31
Prerequisites for IGMP 31
Prerequisites for IGMP Snooping 32
Restrictions for IGMP and IGMP Snooping 32
Restrictions for Configuring IGMP 32
Restrictions for IGMP Snooping 33
Information About IGMP 33
Role of the Internet Group Management Protocol 33
IGMP Multicast Addresses 34
IGMP Versions 34
IGMP Version 1 35
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IGMP Version 2 35
IGMP Version 3 35
IGMPv3 Host Signaling 35
IGMP Versions Differences 35
IGMP Join and Leave Process 38
IGMP Join Process 38
IGMP Leave Process 38
IGMP Snooping 39
Joining a Multicast Group 39
Leaving a Multicast Group 41
Immediate Leave 42
IGMP Configurable-Leave Timer 42
IGMP Report Suppression 42
IGMP Snooping and Device Stacks 43
IGMP Filtering and Throttling 43
Default IGMP Configuration 43
Default IGMP Snooping Configuration 44
Default IGMP Filtering and Throttling Configuration 44
How to Configure IGMP 45
Configuring the Device as a Member of a Group (CLI) 45
Controlling Access to IP Multicast Group (CLI) 47
Changing the IGMP Version(CLI) 49
Modifying the IGMP Host-Query Message Interval (CLI) 51
Changing the IGMP Query Timeout for IGMPv2 (CLI) 53
Changing the Maximum Query Response Time for IGMPv2 (CLI) 55
Configuring the Device as a Statically Connected Member (CLI) 57
Configuring IGMP Profiles (CLI) 59
Applying IGMP Profiles (CLI) 61
Setting the Maximum Number of IGMP Groups (CLI) 62
Configuring the IGMP Throttling Action (CLI) 64
Configuring the Device to Forward Multicast Traffic in the Absence of Directly Connected
IGMP Hosts 66
Controlling Access to an SSM Network Using IGMP Extended Access Lists 67
How to Configure IGMP Snooping 70
Enabling IGMP Snooping 70
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Enabling or Disabling IGMP Snooping on a VLAN Interface (CLI) 71
Setting the Snooping Method (CLI) 73
Configuring a Multicast Router Port (CLI) 74
Configuring a Host Statically to Join a Group (CLI) 76
Enabling IGMP Immediate Leave (CLI) 77
Configuring the IGMP Leave Timer (CLI) 78
Configuring the IGMP Robustness-Variable (CLI) 80
Configuring the IGMP Last Member Query Count (CLI) 81
Configuring TCN-Related Commands 83
Controlling the Multicast Flooding Time After a TCN Event (CLI) 83
Recovering from Flood Mode (CLI) 84
Disabling Multicast Flooding During a TCN Event (CLI) 86
Configuring the IGMP Snooping Querier (CLI) 87
Disabling IGMP Report Suppression (CLI) 89
Monitoring IGMP 91
Monitoring IGMP Snooping Information 91
Monitoring IGMP Filtering and Throttling Configuration 93
Configuration Examples for IGMP 93
Example: Configuring the Device as a Member of a Multicast Group 93
Example: Controlling Access to Multicast Groups 93
Examples: Configuring IGMP Snooping 94
Example: Configuring IGMP Profiles 95
Example: Applying IGMP Profile 95
Example: Setting the Maximum Number of IGMP Groups 95
Example: Interface Configuration as a Routed Port 95
Example: Interface Configuration as an SVI 96
Example: Configuring the Device to Forward Multicast Traffic in the Absence of Directly
Connected IGMP Hosts 96
Controlling Access to an SSM Network Using IGMP Extended Access Lists 96
Example: Denying All States for a Group G 97
Example: Denying All States for a Source S 97
Example: Permitting All States for a Group G 97
Example: Permitting All States for a Source S 97
Example: Filtering a Source S for a Group G 98
Additional References 98
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Feature History and Information for IGMP 99
CHAPTER 5
Configuring IGMP Proxy 101
Finding Feature Information 101
Prerequisites for IGMP Proxy 101
Information about IGMP Proxy 102
IGMP Proxy 102
How to Configure IGMP Proxy 104
Configuring the Upstream UDL Device for IGMP UDLR 104
Configuring the Downstream UDL Device for IGMP UDLR with IGMP Proxy Support 105
Configuration Examples for IGMP Proxy 108
Example: IGMP Proxy Configuration 108
Additional References 109
Feature History and Information for IGMP Proxy 110
CHAPTER 6
Constraining IP Multicast in Switched Ethernet 111
Finding Feature Information 111
Prerequisites for Constraining IP Multicast in a Switched Ethernet Network 111
Information About IP Multicast in a Switched Ethernet Network 112
IP Multicast Traffic and Layer 2 Switches 112
CGMP on Catalyst Switches for IP Multicast 112
IGMP Snooping 113
Router-Port Group Management Protocol (RGMP) 113
How to Constrain Multicast in a Switched Ethernet Network 114
Configuring Switches for IP Multicast 114
Configuring IGMP Snooping 114
Enabling CGMP 114
Configuring IP Multicast in a Layer 2 Switched Ethernet Network 115
Configuration Examples for Constraining IP Multicast in a Switched Ethernet Network 117
Example: CGMP Configuration 117
RGMP Configuration Example 117
Additional References 118
Feature History and Information for Constraining IP Multicast in a Switched Ethernet
Network 119
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CHAPTER 7
Configuring PIM 121
Finding Feature Information 121
Prerequisites for PIM 121
Restrictions for PIM 122
PIMv1 and PIMv2 Interoperability 122
Restrictions for Configuring PIM Stub Routing 123
Restrictions for Configuring Auto-RP and BSR 123
Restrictions for Auto-RP Enhancement 125
Information About PIM 125
Protocol Independent Multicast Overview 125
PIM Dense Mode 125
PIM Sparse Mode 126
Multicast Source Discovery Protocol (MSDP) 126
Sparse-Dense Mode 127
PIM Versions 127
PIM Stub Routing 128
IGMP Helper 129
Rendezvous Points 129
Auto-RP 130
The Role of Auto-RP in a PIM Network 131
Multicast Boundaries 131
Sparse-Dense Mode for Auto-RP 132
Auto-RP Benefits 133
Benefits of Auto-RP in a PIM Network 133
PIMv2 Bootstrap Router 133
PIM Domain Border 134
Multicast Forwarding 134
Multicast Distribution Source Tree 134
Multicast Distribution Shared Tree 135
Source Tree Advantage 136
Shared Tree Advantage 136
PIM Shared Tree and Source Tree 137
Reverse Path Forwarding 138
RPF Check 139
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Default PIM Routing Configuration 140
How to Configure PIM 141
Enabling PIM Stub Routing (CLI) 141
Configuring a Rendezvous Point 143
Manually Assigning an RP to Multicast Groups (CLI) 144
Setting Up Auto-RP in a New Internetwork (CLI) 146
Adding Auto-RP to an Existing Sparse-Mode Cloud (CLI) 149
Preventing Join Messages to False RPs (CLI) 152
Filtering Incoming RP Announcement Messages (CLI) 152
Configuring PIMv2 BSR 154
Defining the PIM Domain Border (CLI) 155
Defining the IP Multicast Boundary (CLI) 156
Configuring Candidate BSRs (CLI) 159
Configuring the Candidate RPs (CLI) 160
Configuring Sparse Mode with Auto-RP(CLI) 162
Delaying the Use of PIM Shortest-Path Tree (CLI) 167
Modifying the PIM Router-Query Message Interval (CLI) 169
Verifying PIM Operations 171
Verifying IP Multicast Operation in a PIM-SM or a PIM-SSM Network 171
Verifying IP Multicast on the First Hop Router 172
Verifying IP Multicast on Routers Along the SPT 173
Verifying IP Multicast Operation on the Last Hop Router 174
Using PIM-Enabled Routers to Test IP Multicast Reachability 177
Configuring Routers to Respond to Multicast Pings 177
Pinging Routers Configured to Respond to Multicast Pings 179
Monitoring and Troubleshooting PIM 179
Monitoring PIM Information 179
Monitoring the RP Mapping and BSR Information 180
Troubleshooting PIMv1 and PIMv2 Interoperability Problems 181
Configuration Examples for PIM 181
Example: Enabling PIM Stub Routing 181
Example: Verifying PIM Stub Routing 182
Example: Manually Assigning an RP to Multicast Groups 182
Example: Configuring Auto-RP 182
Example: Sparse Mode with Auto-RP 183
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Example: Defining the IP Multicast Boundary to Deny Auto-RP Information 183
Example: Filtering Incoming RP Announcement Messages 183
Example: Preventing Join Messages to False RPs 184
Example: Configuring Candidate BSRs 184
Example: Configuring Candidate RPs 184
Additional References 185
Feature History and Information for PIM 187
CHAPTER 8
Configuring PIM MIB Extension for IP Multicast 189
Finding Feature Information 189
Information About PIM MIB Extension for IP Multicast 189
PIM MIB Extensions for SNMP Traps for IP Multicast 189
Benefits of PIM MIB Extensions 190
How to Configure PIM MIB Extension for IP Multicast 190
Enabling PIM MIB Extensions for IP Multicast 190
Configuration Examples for PIM MIB Extensions 192
Example Enabling PIM MIB Extensions for IP Multicast 192
Additional References 192
CHAPTER 9
Configuring MSDP 195
Finding Feature Information 195
195
Information About Using MSDP to Interconnect Multiple PIM-SM Domains 195
Benefits of Using MSDP to Interconnect Multiple PIM-SM Domains 195
196
MSDP Message Types 198
SA Messages 198
SA Request Messages 199
SA Response Messages 199
Keepalive Messages 199
SA Message Origination Receipt and Processing 199
SA Message Origination 199
SA Message Receipt 200
How RPF Check Rules Are Applied to SA Messages 200
How the Software Determines the Rule to Apply to RPF Checks 200
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Rule 1 of RPF Checking of SA Messages in MSDP 200
Implications of Rule 1 of RPF Checking on MSDP 201
Rule 2 of RPF Checking of SA Messages in MSDP 201
Implications of Rule 2 of RPF Checking on MSDP 202
Rule 3 of RPF Checking of SA Messages in MSDP 202
SA Message Processing 202
MSDP Peers 203
MSDP MD5 Password Authentication 203
How MSDP MD5 Password Authentication Works 203
Benefits of MSDP MD5 Password Authentication 203
SA Message Limits 204
MSDP Keepalive and Hold-Time Intervals 204
MSDP Connection-Retry Interval 204
Default MSDP Peers 205
MSDP Mesh Groups 206
Benefits of MSDP Mesh Groups 207
SA Origination Filters 207
Use of Outgoing Filter Lists in MSDP 208
Use of Incoming Filter Lists in MSDP 208
TTL Thresholds in MSDP 209
SA Request Messages 209
SA Request Filters 210
How to Use MSDP to Interconnect Multiple PIM-SM Domains 210
Configuring an MSDP Peer 210
Shutting Down an MSDP Peer 212
Configuring MSDP MD5 Password Authentication Between MSDP Peers 213
Troubleshooting Tips 214
Preventing DoS Attacks by Limiting the Number of SA Messages Allowed in the SA Cache
from Specified MSDP Peers 215
Adjusting the MSDP Keepalive and Hold-Time Intervals 216
Adjusting the MSDP Connection-Retry Interval 218
Configuring a Default MSDP Peer 218
Configuring an MSDP Mesh Group 219
Controlling SA Messages Originated by an RP for Local Sources 221
Controlling the Forwarding of SA Messages to MSDP Peers Using Outgoing Filter Lists 222
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Controlling the Receipt of SA Messages from MSDP Peers Using Incoming Filter Lists 223
Using TTL Thresholds to Limit the Multicast Data Sent in SA Messages 224
Requesting Source Information from MSDP Peers 225
Controlling the Response to Outgoing SA Request Messages from MSDP Peers Using SA
Request Filters 226
Including a Bordering PIM Dense Mode Region in MSDP 227
Configuring an Originating Address Other Than the RP Address 228
Monitoring MSDP 229
Clearing MSDP Connections Statistics and SA Cache Entries 232
Enabling SNMP Monitoring of MSDP 233
Troubleshooting Tips 234
Configuration Examples for Using MSDP to Interconnect Multiple PIM-SM Domains 235
Example: Configuring an MSDP Peer 235
Example: Configuring MSDP MD5 Password Authentication 235
Example: Configuring a Default MSDP Peer 236
Example: Configuring MSDP Mesh Groups 238
Additional References 238
Feature History and Information for Multicast Source Discovery Protocol 239
CHAPTER 10
Configuring Wireless Multicast 241
Finding Feature Information 241
Prerequisites for Configuring Wireless Multicast 241
Restrictions for Configuring Wireless Multicast 242
Restrictions for IPv6 Snooping 242
Restrictions for IPv6 RA Guard 242
Information About Wireless Multicast 242
Information About Multicast Optimization 243
IPv6 Global Policies 244
IPv6 RA Guard 244
Information About IPv6 Snooping 244
IPv6 Neighbor Discovery Inspection 244
IPv6 ND Inspection 245
IPv6 Device Tracking 245
IPv6 First-Hop Security Binding Table 245
Recovery Protocols and Prefix Lists 245
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IPv6 Device Tracking 245
IPv6 Address Glean 245
How to Configure Wireless Multicast 246
Configuring Wireless Multicast-MCMC Mode (CLI) 246
Configuring Wireless Multicast-MCUC Mode (CLI) 247
Configuring IPv6 Snooping (CLI) 248
Configuring IPv6 Snooping Policy (CLI) 249
Configuring Layer 2 Port as Multicast Router Port (CLI) 250
Configuring IPv6 RA Guard (CLI) 251
Configuring Non-IP Wireless Multicast (CLI) 252
Configuring Wireless Broadcast (CLI) 253
Configuring IP Multicast VLAN for WLAN (CLI) 254
Monitoring Wireless Multicast 255
Where to Go Next for Wireless Multicast 256
Additional References 257
CHAPTER 11
Configuring SSM 259
Finding Feature Information 259
Prerequisites for Configuring SSM 259
Restrictions for Configuring SSM 260
Information About SSM and SSM Mapping 261
SSM Components Overview 261
How SSM Differs from Internet Standard Multicast 261
SSM Operations 262
IGMPv3 Host Signaling 263
Benefits of SSM 263
SSM Mapping Overview 264
Static SSM Mapping 265
DNS-Based SSM Mapping 265
SSM Mapping Benefits 267
How to Configure SSM and SSM Mapping 267
Configuring Source Specific Multicast 267
Configuring SSM Mapping 270
Configuring Static SSM Mapping(CLI) 270
Configuring DNS-Based SSM Mapping(CLI) 271
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Configuring Static Traffic Forwarding with SSM Mapping 273
Configuring Static Traffic Forwarding with SSM Mapping (CLI) 274
Verifying SSM Mapping Configuration and Operation 276
Monitoring SSM and SSM Mapping 279
Monitoring SSM 279
Monitoring SSM Mapping 279
Configuration Examples for SSM and SSM Mapping 280
SSM with IGMPv3 Example 280
SSM Filtering Example 280
SSM Mapping Example 281
DNS Server Configuration Example 284
Additional References 284
Feature History and Information for SSM 286
CHAPTER 12
Configuring Basic IP Multicast Routing 287
Finding Feature Information 287
Prerequisites for Basic IP Multicast Routing 287
Restrictions for Basic IP Multicast Routing 288
Information About Basic IP Multicast Routing 288
Multicast Forwarding Information Base Overview 288
Multicast Routing and Device Stacks 289
Default IP Multicast Routing Configuration 289
How to Configure Basic IP Multicast Routing 290
Configuring Basic IP Multicast Routing 290
Configuring IP Multicast Forwarding (CLI) 293
Configuring a Static Multicast Route (mroute) (CLI) 294
Configuring Optional IP Multicast Routing Features 296
Defining the IP Multicast Boundary (CLI) 296
Configuring sdr Listener Support 298
Enabling sdr Listener Support (CLI) 298
Limiting How Long an sdr Cache Entry Exists (CLI) 300
Monitoring and Maintaining Basic IP Multicast Routing 301
Clearing Caches, Tables, and Databases 301
Displaying System and Network Statistics 302
Displaying Multicast Peers, Packet Rates and Loss Information, and Path Tracing 304
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Configuration Examples for IP Multicast Routing 305
Example: Configuring an IP Multicast Boundary 305
Example: Responding to mrinfo Requests 305
Additional References 306
Feature History and Information for IP Multicast 307
CHAPTER 13
Configuring the Service Discovery Gateway 309
Finding Feature Information 309
Restrictions for Configuring the Service Discovery Gateway 309
Information about the Service Discovery Gateway and mDNS 310
mDNS 310
mDNS-SD 310
mDNS-SD Considerations for Wireless Clients 311
Service Discovery Gateway 311
mDNS Gateway and Subnets 311
Filtering 312
How to Configure the Service Discovery Gateway 313
Configuring the Service List (CLI) 313
Configuring the Service List (GUI) 315
Enabling mDNS Gateway and Redistributing Services (CLI) 316
Configuring Interface Service Rules (GUI) 319
Configuring mDNS Global Rules (GUI) 319
Monitoring Service Discovery Gateway 320
Configuration Examples 321
Example: Specify Alternative Source Interface for Outgoing mDNS Packets 321
Example: Redistribute Service Announcements 321
Example: Disable Bridging of mDNS Packets to Wireless Clients 321
Example: Creating a Service-List, Applying a Filter and Configuring Parameters 322
Example: Enabling mDNS Gateway and Redistributing Services 322
Example: Global mDNS Configuration 322
Example: Interface mDNS Configuration 323
Monitoring Service Cache (GUI) 323
Monitoring Static Service Cache (GUI) 324
Where to Go Next for Configuring Services Discovery Gateway 325
Additional References 325
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Feature History and Information for Services Discovery Gateway 327
CHAPTER 14
IP Multicast Optimization: Optimizing PIM Sparse Mode in a Large IP Multicast
Deployment 329
Finding Feature Information 329
Prerequisites for Optimizing PIM Sparse Mode in a Large IP Multicast Deployment 329
Information About Optimizing PIM Sparse Mode in a Large IP Multicast Deployment 330
PIM Registering Process 330
PIM Version 1 Compatibility 330
PIM Designated Router 331
PIM Sparse-Mode Register Messages 331
Preventing Use of Shortest-Path Tree to Reduce Memory Requirement 331
PIM Shared Tree and Source Tree - Shortest-Path Tree 332
Benefit of Preventing or Delaying the Use of the Shortest-Path Tree 333
How to Optimize PIM Sparse Mode in a Large IP Multicast Deployment 333
Optimizing PIM Sparse Mode in a Large Deployment 333
Configuration Examples for Optimizing PIM Sparse Mode in a Large Multicast
Deployment 335
Optimizing PIM Sparse Mode in a Large IP Multicast Deployment Example 335
Additional References 336
Feature History and Information for Optimizing PIM Sparse Mode in a Large IP Multicast
Deployment 336
CHAPTER 15
IP Multicast Optimization: Multicast Subsecond Convergence 339
Finding Feature Information 339
Prerequisites for Multicast Subsecond Convergence 339
Restrictions for Multicast Subsecond Convergence 340
Information About Multicast Subsecond Convergence 340
Benefits of Multicast Subsecond Convergence 340
Multicast Subsecond Convergence Scalability Enhancements 340
PIM Router Query Messages 340
Reverse Path Forwarding 341
RPF Checks 341
Triggered RPF Checks 341
RPF Failover 341
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Topology Changes and Multicast Routing Recovery 342
How to Configure Multicast Subsecond Convergence 342
Modifying the Periodic RPF Check Interval 342
Configuring PIM RPF Failover Intervals 343
Modifying the PIM Router Query Message Interval 344
Verifying Multicast Subsecond Convergence Configurations 345
Configuration Examples for Multicast Subsecond Convergence 346
Example Modifying the Periodic RPF Check Interval 346
Example Configuring PIM RPF Failover Intervals 347
Modifying the PIM Router Query Message Interval Example 347
Additional References 347
Feature History and Information for Multicast Subsecond Convergence 348
CHAPTER 16
IP Multicast Optimization: IP Multicast Load Splitting across Equal-Cost Paths 349
Finding Feature Information 349
Prerequisites for IP Multicast Load Splitting across Equal-Cost Paths 349
Information About IP Multicast Load Splitting across Equal-Cost Paths 350
Load Splitting Versus Load Balancing 350
Default Behavior for IP Multicast When Multiple Equal-Cost Paths Exist 350
Methods to Load Split IP Multicast Traffic 352
Overview of ECMP Multicast Load Splitting 353
ECMP Multicast Load Splitting Based on Source Address Using the S-Hash
Algorithm 353
ECMP Multicast Load Splitting Based on Source and Group Address Using the Basic
S-G-Hash Algorithm 353
Predictability As a By-Product of Using the S-Hash and Basic S-G-Hash Algorithms 353
Polarization As a By-Product of Using the S-Hash and Basic S-G-Hash Algorithms 354
ECMP Multicast Load Splitting Based on Source Group and Next-Hop Address 355
Effect of ECMP Multicast Load Splitting on PIM Neighbor Query and Hello Messages
for RPF Path Selection 356
Effect of ECMP Multicast Loading Splitting on Assert Processing in PIM-DM and DF
Election in Bidir-PIM 356
Effect of ECMP Multicast Load Splitting on the PIM Assert Process in PIM-SM and
PIM-SSM 358
ECMP Multicast Load Splitting and Reconvergence When Unicast Routing Changes 359
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Use of BGP with ECMP Multicast Load Splitting 359
Use of ECMP Multicast Load Splitting with Static Mroutes 359
Alternative Methods of Load Splitting IP Multicast Traffic 360
How to Load Split IP Multicast Traffic over ECMP 360
Enabling ECMP Multicast Load Splitting 360
Prerequisites for IP Multicast Load Splitting - ECMP 361
Restrictions 361
Enabling ECMP Multicast Load Splitting Based on Source Address 361
Enabling ECMP Multicast Load Splitting Based on Source and Group Address 364
Enabling ECMP Multicast Load Splitting Based on Source Group and Next-Hop
Address 365
Configuration Examples for Load Splitting IP Multicast Traffic over ECMP 367
Example Enabling ECMP Multicast Load Splitting Based on Source Address 367
Example Enabling ECMP Multicast Load Splitting Based on Source and Group
Address 368
Example Enabling ECMP Multicast Load Splitting Based on Source Group and Next-Hop
Address 368
Additional References 368
Feature History and Information for Load Splitting IP Multicast Traffic over ECMP 369
CHAPTER 17
IP Multicast Optimization: SSM Channel Based Filtering for Multicast 371
Finding Feature Information 371
Finding Feature Information 371
Prerequisites for SSM Channel Based Filtering for Multicast Boundaries 372
Information About the SSM Channel Based Filtering for Multicast Boundaries Feature 372
Rules for Multicast Boundaries 372
Benefits of SSM Channel Based Filtering for Multicast Boundaries 373
How to Configure SSM Channel Based Filtering for Multicast Boundaries 373
Configuring Multicast Boundaries 373
Configuration Examples for SSM Channel Based Filtering for Multicast Boundaries 375
Configuring the Multicast Boundaries Permitting and Denying Traffic Example 375
Configuring the Multicast Boundaries Permitting Traffic Example 375
Configuring the Multicast Boundaries Denying Traffic Example 375
Additional References 376
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Feature History and Information for SSM Channel Based Filtering for Multicast Boundaries 377
CHAPTER 18
IP Multicast Optimization: PIM Dense Mode State Refresh 379
Finding Feature Information 379
Prerequisite for PIM Dense Mode State Refresh 379
Restrictions on PIM Dense Mode State Refresh 380
Information About PIM Dense Mode State Refresh 380
PIM Dense Mode State Refresh Overview 380
Benefits of PIM Dense Mode State Refresh 380
How to Configure PIM Dense Mode State Refresh 381
Configuring PIM Dense Mode State Refresh 381
Verifying PIM Dense Mode State Refresh Configuration 381
Monitoring and Maintaining PIM DM State Refresh 382
Configuration Examples for PIM Dense Mode State Refresh 383
Originating Processing and Forwarding PIM Dense Mode State Refresh Control Messages
Example 383
Processing and Forwarding PIM Dense Mode State Refresh Control Messages Example 383
Additional References 383
Feature History and Information for PIM Dense Mode State Refresh 385
CHAPTER 19
IP Multicast Optimization: IGMP State Limit 387
Finding Feature Information 387
Prerequisites for IGMP State Limit 387
Restrictions for IGMP State Limit 388
Information About IGMP State Limit 388
IGMP State Limit 388
IGMP State Limit Feature Design 388
Mechanics of IGMP State Limiters 388
How to Configure IGMP State Limit 389
Configuring IGMP State Limiters 389
Configuring Global IGMP State Limiters 389
Configuring Per Interface IGMP State Limiters 390
Configuration examples for IGMP State Limit 392
Configuring IGMP State Limiters Example 392
Additional References 394
IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3.6E (Catalyst 3850 Switches)
OL-32598-01 xix
Contents
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