Cisco Catalyst 3850 series User manual

IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3.6E
(Catalyst 3850 Switches)
First Published: June 27, 2014
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Text Part Number: OL-32598-01

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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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