Avaya Configuring ATM Services Bedienungsanleitung Seite 51
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Understanding ATM Concepts
117374-A Rev. A 2-17
Using Hybrid PVCs for Transparent Bridging
In Figure 2-9, traffic bridges between Site A and Site B. The bridge (Router 1) is
running on the ATM network interface, and its PVCs are not defined as
hybrid/bridged VCs.
Figure 2-9. Example of a Bridged Network
In this example, the bridge receives data from Site A. If the bridge does not
recognize the destination address, it tries to direct traffic through another bridge
port. However, because the PVCs are not defined as hybrid/bridged VCs, the ATM
bridge port views the paths to Site A and Site B as the same.
A bridge does not send the same data over the bridge port from which it just
received the data. This means that the bridge cannot direct the data to Site B. To
resolve this problem, you need to designate the PVCs as hybrid/bridged VCs.
If you define the PVCs as hybrid VCs (refer to Site Manager Software Version
6.0), each PVC acts as a separate bridge port. This enables the bridge running on
the ATM interface to view the traffic from Site A as arriving on a different port
than that of Site B. When the bridge sends data, it now has access to all its ports,
including the port that accesses Site B. Therefore, data from Site A can reach
Site B.
C
D
Router 1
B
A
Bridge port sees one
path to Sites A and B
Router 2
Router 3
E
F
Site A Site B
ATM
network
ATM0013A
- Configuring ATM 1
- Services 1
- Contents 5
- 117374-A Rev. A 10
- About This Guide 17
- Before You Begin 18
- Conventions 18
- Acronyms 19
- Bay Networks Customer Service 22
- How to Get Help 23
- Chapter 1 25
- Starting ATM 25
- Adding ATM to the Router 26
- Defining a Service Record 27
- 117374-A Rev. A 1-5 29
- 1-6 117374-A Rev. A 30
- 1-8 117374-A Rev. A 32
- 2. Click on OK 32
- Adding PVCs 33
- Chapter 2 35
- Understanding ATM Concepts 35
- 2-2 117374-A Rev. A 36
- Figure 2-2. ATM Cell Header 36
- Data Transmission 37
- VP = Virtual path 38
- VC = Virtual channel 38
- Physical Layer 39
- ATM Layer 40
- ATM Adaptation Layer (AAL5) 41
- 2-8 117374-A Rev. A 42
- Data Encapsulation 43
- 2-10 117374-A Rev. A 44
- Encapsulation Rules for PVCs 46
- PVC Access Methods 47
- 2-14 117374-A Rev. A 48
- Hybrid Access 50
- SVC Access Methods 52
- ATM Traffic Parameters 52
- Variable Bit Rate 53
- Rules for Editing Protocols 54
- ARP and Inverse ARP Support 55
- ATM Error Checking 55
- Converting Mb/s to Cells/s 56
- For More Information 57
- Chapter 3 59
- 3-2 117374-A Rev. A 60
- ATM Address Resolution 61
- 3-4 117374-A Rev. A 62
- 117374-A Rev. A 3-5 63
- Chapter 4 65
- LAN Emulation Components 66
- LAN Emulation Server 67
- Broadcast and Unknown Server 67
- 4-4 117374-A Rev. A 68
- Initial State 69
- LECS Connect State 69
- Configure State 69
- Join State 69
- Initial Registration State 70
- BUS Connect State 70
- Operational State 70
- Chapter 5 73
- Customizing an ATM Line 73
- 5-2 117374-A Rev. A 74
- Assigning the Framing Mode 75
- 5-4 117374-A Rev. A 76
- Defining ATM Cell Insertion 77
- Defining the Interface MTU 77
- 5-6 117374-A Rev. A 78
- Specifying DS3 Line Build Out 80
- Chapter 6 83
- Service Records 83
- Autogenerating ATM Addresses 84
- Assigning ATM Addresses 85
- 6-4 117374-A Rev. A 86
- Entering an Emulated LAN Name 88
- Defining the MTU 89
- Chapter 7 91
- Customizing PVCs 91
- Setting a VCI Number 92
- Setting the PCR 93
- 7-4 117374-A Rev. A 94
- Table 7-1. Valid PCR Ranges 94
- 7-6 117374-A Rev. A 96
- Table 7-2. Valid SCR Ranges 96
- Chapter 8 101
- Specifying an Owner 102
- Entering an ELAN Name 102
- Entering a LES ATM Address 102
- Selecting a Configuration Mode 103
- 8-4 117374-A Rev. A 104
- Configuring ATM Services 104
- Setting the Control Timeout 105
- Setting the Aging Time 106
- 117374-A Rev. A 8-7 107
- 8-8 117374-A Rev. A 108
- Entering a LECS ATM Address 109
- Where to Go Next 110
- Chapter 9 111
- Customizing Signaling 111
- Assigning a Protocol Standard 112
- Setting Connection Thresholds 113
- Setting Signaling Timers 114
- 9-6 117374-A Rev. A 116
- 9-8 117374-A Rev. A 118
- Defining Retransmissions 119
- Pacing Calls 119
- Chapter 10 121
- Customizing ILMI 121
- Setting the ILMI Get Timer 122
- Setting the ILMI Set Timer 123
- Chapter 11 125
- Redefining the ILMI Control VC 126
- Table 11-1. Valid PCR Ranges 127
- Setting the SCR 128
- Table 11-2. Valid SCR Ranges 129
- Setting the MBS 130
- Setting the Transmit SDU Size 131
- Setting the Receive SDU Size 131
- Chapter 12 133
- Customizing SAAL 133
- Enabling or Disabling SAAL 134
- Modifying SAAL Timers 134
- Defining PDU Values 136
- Appendix A 139
- Site Manager Parameters 139
- A-2 117374-A Rev. A 140
- Using the Menu Path 141
- A-4 117374-A Rev. A 142
- 144
- 147
- 151
- A-14 117374-A Rev. A 152
- A-16 117374-A Rev. A 154
- A-20 117374-A Rev. A 158
- 160
- A-24 117374-A Rev. A 162
- A-26 117374-A Rev. A 164
- 165
- A-28 117374-A Rev. A 166
- A-30 117374-A Rev. A 168
- A-32 117374-A Rev. A 170
- 172
- 173
- A-38 117374-A Rev. A 176
- A-42 117374-A Rev. A 180
- A-44 117374-A Rev. A 182
- 184
- A-48 117374-A Rev. A 186
- A-50 117374-A Rev. A 188
- A-52 117374-A Rev. A 190
- A-54 117374-A Rev. A 192
- A-56 117374-A Rev. A 194
- A-60 117374-A Rev. A 198
- A-62 117374-A Rev. A 200
- A-64 117374-A Rev. A 202
- ATM0046A 204
- 205
- A-68 117374-A Rev. A 206
- A-70 117374-A Rev. A 208
- 209
- A-72 117374-A Rev. A 210
- A-74 117374-A Rev. A 212
- Appendix B 215
- B-2 117374-A Rev. A 216
- ATM FRE-2 Line Parameters 218
- ATM ARE Line Parameters 218
- (continued) 219
- B-6 117374-A Rev. A 220
- Appendix C 223
- ATM Sample Log 223
- C-2 117374-A Rev. A 224
- UME refers to ILMI 226
- C-6 117374-A Rev. A 228
- C-8 117374-A Rev. A 230
- C-10 117374-A Rev. A 232
- LAN Emulation over 233
- specification 233
- C-12 117374-A Rev. A 234
- C-14 117374-A Rev. A 236
- C-16 117374-A Rev. A 238
- C-18 117374-A Rev. A 240
- C-20 117374-A Rev. A 242
- C-22 117374-A Rev. A 244
- Data VC 245
- Target ATM Address 245
- C-24 117374-A Rev. A 246
- C-26 117374-A Rev. A 248
- 117374-A Rev. A Index-1 251
- 117374-A Rev. A Index-3 253
- 117374-A Rev. A Index-5 255
- 117374-A Rev. A Index-7 257
- 117374-A Rev. A Index-9 259
- 117374-A Rev. A Index-11 261
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