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Using Translation Bridge Services
117351-A Rev. A 4-3
Bridge Operations
The Bay Networks translation bridge software provides a link between the
transparent bridging and source routing software on the router. The following
sections describe how that link functions.
SR Operations
To facilitate SR operations, you assign the TB network a ring number. To stations
on the SR network, the entire TB network appears to be one additional network
segment or ring, identified by this ring number. When the SR bridge receives a
frame destined for this ring number, it passes it to the translation bridge.
Routing of Explorer Frames
SR networks use explorer frames to determine the route between stations. (See
Cha
pter 2 for a description of how SR networks determine routes.)
Some stations generate All-Routes Explorer (ARE) frames, which are multiple
frames that traverse all the possible routes between source and destination end
stations. Some stations generate a spanning-tree explorer (STE) frame, a single
frame that follows a loop-free path from source to destination.
When an SR network interface receives an STE or ARE frame, the source route
bridge is responsible for forwarding that frame to any other appropriate source
route network interfaces. The translation bridge is responsible for forwarding that
frame to any other appropriate transparent bridge network. When the translation
bridge receives either an STE or ARE frame, it determines what to do based on the
frame’s source and destination addresses, as follows:
• If the frame has a group destination address, the translation bridge completes
these steps:
-- Forwards the frame to the transparent bridge, which sends it out all ports.
-- If the source address is not in the RIF table, adds the address and its
routing information to the table.
-- If the source address is in the RIF table, updates its routing information.
• If the frame has a specific destination address, the translation bridge
completes these steps:
-- If the source address is not in the RIF table, adds the address and its
routing information to the table.
- Configuring Bridging 1
- Services 1
- Contents 5
- 117351-A Rev. A 10
- About This Guide 17
- Conventions 18
- Acronyms 19
- Bay Networks Customer Service 21
- How to Get Help 21
- Chapter 1 23
- How the Bridge Works 24
- The Translation Process 25
- BRG0027A 26
- 117351-A Rev. A 1-5 27
- 1-6 117351-A Rev. A 28
- DA SA DSAP SSAP CTL DATA FCS 29
- BRG0004A 29
- Spanning Tree Algorithm 30
- 117351-A Rev. A 1-9 31
- 1-10 117351-A Rev. A 32
- 117351-A Rev. A 1-11 33
- 1-12 117351-A Rev. A 34
- BRG0008A 35
- 1-14 117351-A Rev. A 36
- Enabling Bridge Service 37
- 117351-A Rev. A 1-17 39
- Editing Bridge Parameters 40
- 117351-A Rev. A 1-19 41
- 117351-A Rev. A 1-23 45
- 1-26 117351-A Rev. A 48
- 1-28 117351-A Rev. A 50
- 117351-A Rev. A 1-29 51
- Flushing the Forwarding Table 54
- 2. Click on OK 55
- Chapter 2 57
- 2-2 117351-A Rev. A 58
- 117351-A Rev. A 2-3 59
- 2-4 117351-A Rev. A 60
- Figure 2-3. Route Discovery 60
- How IP Encapsulation Works 61
- 2-6 117351-A Rev. A 62
- 117351-A Rev. A 2-7 63
- IP Encapsulation Features 64
- 117351-A Rev. A 2-9 65
- 2-10 117351-A Rev. A 66
- BRG0016A 67
- 2-12 117351-A Rev. A 68
- 117351-A Rev. A 2-13 69
- 2-14 117351-A Rev. A 70
- 117351-A Rev. A 2-15 71
- 2-16 117351-A Rev. A 72
- BRG0020A 73
- 2-18 117351-A Rev. A 74
- 117351-A Rev. A 2-19 75
- IP Encapsulation Guidelines 76
- Source Routing over FDDI 77
- 117351-A Rev. A 2-23 79
- 2-24 117351-A Rev. A 80
- 117351-A Rev. A 2-25 81
- 2-26 117351-A Rev. A 82
- 117351-A Rev. A 2-27 83
- 2-28 117351-A Rev. A 84
- 117351-A Rev. A 2-29 85
- 117351-A Rev. A 2-31 87
- 2-32 117351-A Rev. A 88
- 117351-A Rev. A 2-33 89
- 2-36 117351-A Rev. A 92
- 2-38 117351-A Rev. A 94
- 117351-A Rev. A 2-39 95
- 117351-A Rev. A 2-41 97
- 2-42 117351-A Rev. A 98
- 117351-A Rev. A 2-43 99
- 100
- 117351-A Rev. A 2-45 101
- 117351-A Rev. A 2-47 103
- Configuring Bridging Services 104
- 2-48 117351-A Rev. A 104
- 117351-A Rev. A 2-49 105
- 117351-A Rev. A 2-51 107
- 108
- 108
- Guidelines 109
- 2-54 117351-A Rev. A 110
- 117351-A Rev. A 2-55 111
- 2-58 117351-A Rev. A 114
- 2. Select OK 114
- Chapter 3 115
- Using NetBIOS Services 115
- Registering Station Names 116
- Establishing Sessions 117
- Sessionless Communication 118
- Broadcast Reduction 118
- 3-6 117351-A Rev. A 120
- Cache Lookup 122
- Cache Aging 122
- Implementation Notes 123
- NetBIOS Caches 124
- Enabling NetBIOS Services 125
- Editing NetBIOS Parameters 125
- 3-12 117351-A Rev. A 126
- 117351-A Rev. A 3-13 127
- 3-16 117351-A Rev. A 130
- 117351-A Rev. A 3-23 137
- 3-28 117351-A Rev. A 142
- 3. Click on Delete 142
- Chapter 4 143
- Databases 144
- Bridge Operations 145
- 4-4 117351-A Rev. A 146
- TB to SR Challenges 147
- 4-6 117351-A Rev. A 148
- BRG0024A 150
- 117351-A Rev. A 4-9 151
- 4-10 117351-A Rev. A 152
- 117351-A Rev. A 4-11 153
- 4-12 117351-A Rev. A 154
- 117351-A Rev. A 4-13 155
- 4-14 117351-A Rev. A 156
- 117351-A Rev. A 4-15 157
- 4-16 117351-A Rev. A 158
- 4-18 117351-A Rev. A 160
- 161
- 162
- 117351-A Rev. A 4-21 163
- 117351-A Rev. A 4-23 165
- 4-24 117351-A Rev. A 166
- 117351-A Rev. A 4-25 167
- Chapter 5 169
- 5-2 117351-A Rev. A 170
- Defining a Closed User Group 171
- Enabling NML Services 173
- Editing NML Parameters 174
- 117351-A Rev. A 5-7 175
- 177
- 5-10 117351-A Rev. A 178
- 179
- 117351-A Rev. A 5-13 181
- 5-14 117351-A Rev. A 182
- Enabling Ranges 183
- Deleting NML from the Router 185
- Appendix A 187
- Site Manager Default Settings 187
- A-2 117351-A Rev. A 188
- A-4 117351-A Rev. A 190
- A-6 117351-A Rev. A 192
- A-8 117351-A Rev. A 194
- Appendix B 197
- Routing Control 198
- Table B-1. Frame Size Bits 199
- Routing Designators 200
- 117351-A Rev. A Index-1 201
- 117351-A Rev. A Index-3 203
- 117351-A Rev. A Index-5 205
- 117351-A Rev. A Index-7 207
- Index-8 117351-A Rev. A 208
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