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Configuring IP Multicasting and Multimedia Services
1-2
117355-D Rev 00
Multicast Host Groups
IP multicasting is a method for addressing, routing, and delivering a datagram to a
collection of receivers -- called a host group.
Host groups can be permanent or transient:
•A permanent host group has a well-known, administratively assigned IP
multicast group address. The address, not the membership, is permanent and
defines the group. A permanent host group can consist of zero or more
members.
•A transient host group exists only as long as it has members that need its
services. IP addresses in the multicast range that are not reserved for
permanent groups are available for dynamic assignment to transient host
groups.
An IP multicast host group can consist of zero or more members and places no
restrictions on its membership. Host members can reside anywhere; they can join
and leave the group at any time; and they can be members of more than one group
at the same time.
To receive a multicast message addressed to a multicast host group, a host must be
a member of the group and must reside on a network where that group is
registered with a local multicast router. However, any host system on any IP
network can send a message to a multicast group using the group’s IP multicast
address: a host does not need to be a member of a group to send a multicast
message to its members.
In general, hosts that are members of the same group reside on different networks.
However, a range of multicast addresses (224.0.0.x) is reserved for groups that are
locally scoped. All message traffic for these hosts remains on the local network.
Hosts that belong to a group in this address range and that reside in different
networks will not receive each other’s message traffic.
Note:
Multicast data packets are affected by traffic filters. Therefore, you must
ensure that traffic filters configured on a multicast router do not prevent a host
that is a member of a group from receiving packets intended for that group.
- 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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