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Configuring IP Multicasting Services
5-12 114064 Rev. B
How the Agent Forwards ST2 Data Downstream
An ST agent receives data packets encapsulated by an ST header. A data packet
received by an ST agent contains the HID assigned to the stream for the branch
from the previous hop to itself. The agent uses the HID to quickly obtain the
necessary forwarding information for the next hop.
The forwarding information identifies the next-hop agent and includes the HID
and address of the next hop.
How the Agent Shuts Down a Stream
Two SCMP messages -- Disconnect and Refuse -- allow ST2 agents to shut down
a stream in an orderly manner:
• An intermediate agent receives SCMP Disconnect messages on its upstream
ST2 interfaces. Disconnect messages can be generated by the origin or, in the
case of network failure, by a next-hop agent upstream.
• An intermediate agent receives SCMP Refuse messages on its downstream
ST2 interfaces. Refuse messages can be generated by an ST2 target or by a
next-hop agent downstream.
The ST2 agent acknowledges the request to shut down the stream and performs
the appropriate action. In the case of a Disconnect message, the agent sends a
Disconnect message to the next-hop agent or agents downstream. In the case of a
Refuse message, the agent sends a Refuse message to the next hop upstream.
Configuring ST2 on the Router
The following sections describe global ST2 features that you can configure on the
router.
Enabling and Disabling ST2
By default, the router starts ST2 on the slot when you configure an ST2 interface
on a circuit.
You can use Site Manager to disable and reenable ST2 on the slot.
Site Manager: Enable parameter: page A-19
- 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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