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Configuring IP Multicasting and Multimedia Services
9-2
117355-D Rev 00
IGMP Relay Overview
An IGMP Relay device is a unicast router with an interface to a multicast router
and interfaces to one or more networks containing network hosts. Figure 9-1
shows an IGMP Relay device connected to three LANs containing host systems.
Figure 9-1. IGMP Relay Device
The IGMP Relay device provides the following group registration services for an
IP multicast router:
• Sends IGMP host membership queries to hosts on its attached local networks
• Receives host membership reports and unsolicited join messages from hosts
on its attached networks and forwards them to the attached multicast router
• Forwards multicast data to group members on locally attached networks
For more information about IGMP, see Chapter 3, “Configuring and Customizing
IGMP.”
IP0077A
IGMP Relay
IP
multicast
router
LAN A
LAN B
LAN C
- Configuring IP 1
- Multicasting and 1
- Multimedia Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 117355-D Rev 00 10
- Before You Begin 19
- Text Conventions 20
- Acronyms 21
- Related Publications 23
- How to Get Help 24
- Chapter 1 25
- Multicast Host Groups 26
- Multicast Addresses 27
- Resource Reservation Protocol 28
- Bay Networks Resource Manager 29
- IGMP Relay 29
- Multicast Table Manager 29
- Multicast Migration 30
- Dynamic to Static 31
- Static to Dynamic 31
- Network to Static Interfaces 33
- Chapter 2 39
- Starting IGMP 40
- Starting DVMRP 42
- Starting MOSPF 44
- Starting PIM 45
- Starting PIM on the Router 46
- Multicast.” 47
- Starting RSVP 48
- Chapter 3 51
- IGMP Concepts and Terminology 52
- IGMP Host Reports 53
- Host Leave Messages 53
- Customizing IGMP Globally 54
- Logging IGMP Messages 60
- Enabling Join Acknowledgments 62
- Accepting a Nonlocal Report 64
- Specifying Query Suppression 67
- Specifying a Query Rate 69
- Configuring IGMP Policies 82
- Dynamic Network 85
- Static Interfaces 86
- Deleting IGMP 89
- Chapter 4 91
- Neighbor Connections 92
- IP00031A 93
- Source Route Advertisements 94
- How DVMRP Chooses a Route 95
- Routing Table 96
- Shortest-Path Trees 96
- Tree Pruning 97
- Customizing DVMRP Globally 98
- Setting the Update Interval 100
- Using Site Manager 101
- Using the BCC 102
- Setting the Leaf Timer 109
- Specifying a Probe Interval 111
- Logging DVMRP Messages 119
- Specifying a Threshold 127
- Customizing DVMRP 129
- Advertising a Default Route 134
- Listening for a Default Route 136
- Configuring a DVMRP Tunnel 140
- Supplying Addresses 141
- Specifying the Cost 146
- Configuring DVMRP Policies 159
- IP address 160
- (continued) 160
- Examples 161
- (continued) 170
- Deleting DVMRP 174
- Chapter 5 175
- IR Internal router 177
- BR Border router 177
- ASBR Boundary router 177
- Configuring MOSPF Globally 178
- Enabling Dynamic TTL 181
- MOSPF Interface 182
- Nonmulticast Interface 182
- Chapter 6 187
- PIM Concepts and Terminology 188
- Components of a PIM Network 189
- Figure 6-1. PIM Network 192
- Customizing PIM Globally 205
- Setting the Probe Timer 214
- Logging PIM Messages 216
- Setting the Hello Interval 218
- Deleting PIM 223
- Chapter 7 225
- Configuring RSVP 225
- How RSVP Works 226
- Configuring RSVP Globally 228
- Choosing a Slot 229
- Logging RSVP Messages 230
- Setting the TTL Override 235
- Setting the Route Delay Value 236
- Deleting RSVP 238
- Chapter 8 239
- Reserving Line Resources 239
- Resource Manager 240
- Supported Media 241
- Caution: 243
- Chapter 9 255
- Configuring IGMP Relay 255
- IGMP Relay Overview 256
- IGMP Relay Topology 257
- How IGMP Relay Works 258
- Appendix A 279
- Site Manager Parameters 279
- DVMRP Parameters 280
- DVMRP Interface Parameters 285
- DVMRP Tunnel Parameters 290
- IGMP Parameters 295
- IGMP Static Host Parameters 299
- IGMP Interface Parameters 300
- IP Configuration Parameters 304
- Resource Manager Parameters 306
- OSPF Global Parameters 313
- PIM Parameters 315
- PIM Interface Parameters 329
- RSVP Parameters 332
- RSVP Interface Parameters 334
- Multicast Policy Parameters 337
- IGMP Group Policy Parameters 354
- Appendix B 365
- Troubleshooting Commands 365
- <retry_count> 368
- <timeout_count> 368
- For example, the following 370
- Index-10 380
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