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Configuring IP Multicasting and Multimedia Services
4-2 117355-A Rev. A
DVMRP Concepts and Terminology
DVMRP is a multicasting protocol that provides a mechanism for routers to
propagate multicast datagrams in a manner that minimizes the number of excess
copies sent to any particular network.
This section covers the following topics:
Neighbor Connections
In a DVMRP environment, neighbors are multicasting routers that are connected
directly or through a tunnel.
• Directly connected neighbors are routers that have an interface to the same
network.
• Tunnel-connected neighbors are multicast routers that communicate through a
unicast network, exchanging DVRMP messages that are encapsulated in IP
datagrams.
In Figure 4-
1, for example, multicasting Router A has two neighbors, Router B
and Router C. Router A and Router B are connected directly -- they both have
interfaces to Net 6. Router A and Router C communicate through a tunnel that
includes a unicast router.
Topic Page
Neighbor Connections 4-2
Source Route Advertisements 4-4
How DVMRP Chooses a Route 4-5
Routing Table 4-6
Shortest-Path Trees 4-7
- Configuring IP 1
- Multicasting and 1
- Multimedia Services 1
- Contents 5
- 117355-A Rev. A 11
- About This Guide 15
- Before You Begin 16
- Conventions 16
- Acronyms 17
- Bay Networks Customer Service 19
- How to Get Help 19
- Chapter 1 21
- Multicast Host Groups 22
- Multicast Extensions to OSPF 24
- Resource Reservation Protocol 24
- Bay Networks Resource Manager 24
- Multicast Table Manager 25
- Chapter 2 27
- Starting IGMP 28
- Starting DVMRP 29
- Starting MOSPF 30
- Starting RSVP 31
- 2-32 117355-A Rev. A 32
- Chapter 3 33
- Customizing IGMP 33
- IGMP Concepts and Terminology 34
- IGMP Host Reports 35
- Host Leave Messages 35
- Customizing Global IGMP 36
- Enabling and Disabling IGMP 37
- Using the BCC 38
- Using Site Manager 39
- Configuring Logging 41
- Enabling Join Acknowledgments 42
- 3-12 117355-A Rev. A 44
- Specifying a Query Rate 46
- Chapter 4 53
- Customizing DVMRP 53
- Neighbor Connections 54
- Figure 4-1. Multicast Routers 55
- Source Route Advertisements 56
- How DVMRP Chooses a Route 57
- Routing Table 58
- Shortest-Path Trees 59
- Customizing DVMRP Globally 60
- Setting the Update Interval 62
- Configuring Tree Pruning 63
- Configuring DVMRP Timers 64
- 4-14 117355-A Rev. A 66
- Specifying a Probe Interval 68
- 4-18 117355-A Rev. A 70
- Logging Debugging Messages 71
- 4-20 117355-A Rev. A 72
- 4-22 117355-A Rev. A 74
- 4-24 117355-A Rev. A 76
- Specifying a Threshold 77
- TTL value from 1 to 254 78
- Configuring a Forwarding Table 79
- 4-28 117355-A Rev. A 80
- Advertising a Default Route 82
- Listening for a Default Route 83
- 4-32 117355-A Rev. A 84
- Configuring a Tunnel 85
- 4-34 117355-A Rev. A 86
- 4-36 117355-A Rev. A 88
- Specifying the Cost 89
- Specifying a TTL 90
- 4-40 117355-A Rev. A 92
- 4-44 117355-A Rev. A 96
- Chapter 5 97
- MOSPF Overview 98
- • All multicasting types 99
- Configuring MOSPF Globally 100
- 5-6 117355-A Rev. A 102
- Enabling Dynamic TTL 104
- Chapter 6 107
- Configuring QOSPF 107
- Figure 6-1. QOSPF Topology 108
- 6-2 117355-A Rev. A 108
- Configuring QOSPF 109
- Enabling Route Pinning 110
- 6-6 117355-A Rev. A 112
- Chapter 7 113
- Configuring RSVP 113
- How RSVP Works 114
- Configuring RSVP 115
- Configuring RSVP Globally 116
- Choosing a Slot 117
- 7-6 117355-A Rev. A 118
- 7-8 117355-A Rev. A 120
- 7-10 117355-A Rev. A 122
- Setting the TTL Override 123
- Setting the Route Delay Value 124
- Chapter 8 127
- Reserving Line Resources 127
- Resource Manager 128
- Supported Media 129
- 8-4 117355-A Rev. A 130
- 8-6 117355-A Rev. A 132
- 8-8 117355-A Rev. A 134
- 8-10 117355-A Rev. A 136
- 8-12 117355-A Rev. A 138
- 8-14 117355-A Rev. A 140
- 8-16 117355-A Rev. A 142
- Appendix A 143
- Site Manager Parameters 143
- DVMRP Parameters 144
- A-4 117355-A Rev. A 146
- 148
- A-8 117355-A Rev. A 150
- 151
- 153
- A-12 117355-A Rev. A 154
- 155
- IGMP Parameters 157
- 158
- IP Configuration Parameters 162
- Resource Manager Parameters 164
- 165
- 166
- 168
- A-28 117355-A Rev. A 170
- 171
- 171
- 171
- 172
- 174
- RSVP Parameters 175
- 176
- A-36 117355-A Rev. A 178
- Appendix B 179
- Multicasting Tools 179
- <source> 181
- <destination> 181
- <group> 181
- <retry_count> 182
- <timeout_count> 182
- 183
- 184
- 184
- 117355-A Rev. A Index-1 185
- 117355-A Rev. A Index-3 187
- 117355-A Rev. A Index-5 189
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