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Configuring IP Multicasting Services
5-2 114064 Rev. B
ST2 Concepts and Terminology
The Internet Stream Protocol (ST2) enables a network application to reserve
resources on internet routers for an ST2 stream -- a transmission path from a data
origin to one or more data targets. The capability to reserve Internet resources
makes ST2 well suited for video conferencing, real-time simulation, and other
multimedia applications.
An ST2 stream is a point-to-point or point-to-multipoint connection. F
igure 5-1
shows an ST2 stream established between a single video stream unit -- the origin
of the transmissions -- and six receiving target video systems. The stream is
simplex -- data flows in one direction only, downstream from the origin to the
targets.
ST2 and IP
Underlying and supporting an ST2 stream is an internet topology that includes
multiple IP routers capable of providing and guaranteeing the resources required
for the data transmission. For example, the topology underlying the stream in
F
igure 5-1 includes seven routers.
An ST2 stream creates a semblance of an end-to-end connection establishment
typical of a virtual circuit protocol. However, messages are never exchanged
directly between origin and targets. Each router discovers the next-hop IP routers
and is concerned only with the part of the stream between itself and these routers.
ST2 Agents
Each IP router supporting the stream is configured with the hardware and software
required for ST2 data transmissions; in addition, each router is running ST2 agent
software. Such routers are considered to be ST2 capable.
An ST2 agent that receives control messages and stream data directly from an
origin application or delivers control messages and stream data to a target
application is considered to be a host agent. ST2 agents that forward control
messages and data to the next agent downstream are considered to be intermediate
agents. A Bay Networks router can be configured as an intermediate ST2 agent.
The ST2 environment in F
igure 5-1 includes three Bay Networks routers
(BayNet/ST2 1, BayNet/ST2 2, and BayNet/ST2 3).
- Configuring IP 1
- Multicasting Services 1
- USA Requirements Only 3
- Canada Requirements Only 5
- T1 Service 8
- Bay Networks Software License 9
- (continued) 10
- Contents 11
- 114064 Rev. B 12
- About This Guide 21
- Conventions 22
- Acronyms 23
- Bay Networks Customer Service 24
- How to Get Help 25
- For More Information 25
- Chapter 1 27
- Multicasting Overview 27
- Multicast Addresses 28
- Multicast Protocols 29
- Chapter 2 31
- Starting ST2 33
- Click on OK 34
- Chapter 3 35
- Customizing IGMP 35
- IGMP Concepts and Terminology 36
- Configuring IGMP on the Router 37
- Configuring Logging 38
- Enabling and Disabling IGMP 39
- Specifying a Query Rate 39
- 3-6 114064 Rev. B 40
- Chapter 4 43
- Customizing DVMRP 43
- Neighbor Connections 44
- Figure 4-1. Multicast Routers 45
- Source Route Advertisements 46
- How DVMRP Chooses a Route 46
- Shortest-Path Trees 48
- Setting the Update Interval 49
- Configuring Tree Pruning 50
- Configuring DVMRP Timers 51
- 4-10 114064 Rev. B 52
- Specifying a Probe Interval 53
- Logging Debugging Messages 54
- Specifying an MTU Size 54
- Configuring DVMRP on a Circuit 55
- Specifying a Threshold 56
- Configuring a Forwarding Table 57
- Configuring a Tunnel 58
- Specifying the Cost 59
- Specifying a TTL 59
- 4-18 114064 Rev. B 60
- Chapter 5 61
- Customizing ST2 Services 61
- ST2 Concepts and Terminology 62
- Stream Control Messages 64
- Neighbors and Tunnels 64
- Resource Manager 65
- ST2 Features 66
- 5-8 114064 Rev. B 68
- 5-10 114064 Rev. B 70
- Configuring ST2 on the Router 72
- Configuring an ST2 Interface 73
- 5-14 114064 Rev. B 74
- Table 5-2. ST2 Timers 74
- Chapter 6 77
- Reserving Line Resources 77
- Supported Media 78
- Starting the Resource Manager 79
- Click on Values 80
- 6-6 114064 Rev. B 82
- 6-8 114064 Rev. B 84
- 6-10 114064 Rev. B 86
- 114064 Rev. B 6-13 89
- Appendix A 91
- 114064 Rev. B A-3 93
- A-4 114064 Rev. B 94
- 114064 Rev. B A-5 95
- A-8 114064 Rev. B 98
- 99
- 100
- 114064 Rev. B A-11 101
- IGMP Parameters 102
- 104
- A-16 114064 Rev. B 106
- IP Configuration Parameters 107
- A-18 114064 Rev. B 108
- ST2 Parameters 109
- 114064 Rev. B A-21 111
- A-22 114064 Rev. B 112
- 114064 Rev. B A-23 113
- 115
- A-26 114064 Rev. B 116
- Resource Manager Parameters 117
- 118
- 118
- 114064 Rev. B A-29 119
- 121
- A-32 114064 Rev. B 122
- 114064 Rev. B Index-1 123
- 114064 Rev. B Index-3 125
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