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Configuring ATM Services
1-6
117374-B Rev. 00
Permanent and Switched Virtual Connections
Virtual channels and virtual paths allow you to establish virtual channel links
(VCLs). You can create VCLs as either permanent virtual circuits (PVCs) or
switched virtual circuits (SVCs). After you establish a PVC, you can transfer
information over it at any time. SVCs activate, through signaling and network
switching, only when there is information ready for transmission.
ATM Layers
The B-ISDN protocol reference model, on which ATM is based, consists of four
layers (Figure 1-4
). Each layer communicates only with the layer directly above it
and the layer directly below it.
Figure 1-4. B-ISDN ATM Protocol Reference Model
Higher protocol layer
ATM
adaptation
layer
(AAL)
Convergence sublayer (CS)
Segmentation and reassembly sublayer (SAR)
ATM layer
Transmission convergence sublayer
Physical medium dependent sublayer (PMD)
Physical
layer
(PHY)
ATM0003B
- Configuring ATM 1
- Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 117374-B Rev. 00 10
- About This Guide 19
- Before You Begin 20
- Conventions 20
- Acronyms 21
- Bay Networks Customer Service 24
- How to Get Help 25
- Chapter 1 27
- Understanding ATM, MPOA, and 27
- ATM General Information 28
- Figure 1-2. ATM Cell Header 29
- Data Transmission 30
- VP = Virtual path 31
- VC = Virtual channel 31
- ATM Layers 32
- Table 1-1. Maximum Bandwidth 34
- ATM0005A 35
- Caution: 37
- Data Encapsulation Methods 38
- Encapsulation Rules for PVCs 42
- PVC Access Methods 43
- SVC Access Methods 48
- Assigning ATM Addresses 48
- ATM Traffic Parameters 49
- ARP and Inverse ARP Support 53
- ATM Error Checking 53
- Converting Mb/s to Cells/s 53
- ATM Address Resolution 57
- ATM LAN Emulation Concepts 59
- LAN Emulation Connectivity 60
- LAN Emulation Components 60
- Redundant LES/BUS 61
- LAN Emulation States 62
- MPOA Logical Components 65
- MPOA Basic Elements 66
- ATM00002 68
- Figure 1-15 69
- For More Information 71
- Chapter 2 73
- ATM Router Redundancy 73
- Starting Configuration Tools 74
- Starting ATM Services 74
- Defining PVC Service 76
- Defining Classical IP Service 76
- Defining LEC Service 77
- Adding IP 79
- Adding IPX 79
- Adding PVCs 85
- Starting the MPOA Server 86
- Configuring the MPS 89
- Redundency 91
- Deleting ATM from the Router 95
- Chapter 3 99
- Using the BCC 100
- Defining the Interface MTU 101
- Using Site Manager 102
- Assigning the Framing Mode 107
- Specifying DS-3 Line Buildout 109
- Customizing an ATM Interface 115
- Autogenerating ATM Addresses 116
- Where to Go Next 120
- Chapter 4 121
- Customizing Signaling 121
- Defining Signaling 122
- Setting Connection Thresholds 129
- Defining Signaling Timers 135
- Configuring ATM Services 136
- Defining Retransmissions 142
- Pacing Calls 145
- Defining ILMI 146
- Defining Control VCs 154
- Changing VPI Numbers 155
- Changing VCI Numbers 157
- ) and enter: 158
- Table 4-2. Valid PCR Ranges 160
- Defining SSCOP/Signaling AAL 176
- Modifying SAAL Timers 180
- Defining PDU Values 182
- Chapter 5 189
- Customizing PVC Service 189
- Records and PVCs 189
- Deleting a Service Record 193
- Setting the PCR 197
- Setting the SCR 199
- Setting the MBS 201
- Setting the Transmit SDU Size 202
- Setting the Receive SDU Size 204
- PVC to NLPID encapsulation: 206
- Copying a PVC 207
- Deleting a PVC 208
- Chapter 6 211
- Chapter 7 223
- Customizing LAN Emulation 223
- Service Records and Clients 223
- Specifying an Owner 237
- Assigning ATM LES Addresses 238
- Modifying a LES/BUS Entry 243
- Deleting a LES Entry 244
- Setting the Control Timeout 251
- Setting the Aging Time 255
- (continued) 261
- Setting the Flush Timeout 263
- Specifying a LECS ATM Address 265
- Chapter 8 271
- (continued) 275
- Defining MPS Timers 280
- Setting the Give Up Time 284
- Defining MPS Cache Values 286
- Maximum Cache Size 287
- Deleting an Individual MPS 288
- Chapter 9 291
- Appendix A 295
- Site Manager Parameters 295
- Accessing ATM Parameters 296
- Using the Menu Path 297
- ATM Line Parameters 298
- ATM Interface Parameters 304
- ATM Service Record Parameters 307
- LAN Emulation Parameters 318
- LES Parameter Descriptions 327
- ATM Signaling Parameters 329
- ATM ILMI Signaling Parameters 340
- ATM Signaling AAL Parameters 347
- MPOA Parameters 351
- NHRP Parameters 359
- Adjacent Host Parameters 370
- Appendix B 373
- <slot> 374
- <connector> 374
- <servicename> 378
- <ip address> 381
- (flag) and filter argument: 386
- Appendix C 391
- NHRP Overview 392
- Configuring NHRP 393
- Editing an NHRP Record 399
- Disabling an NHRP Record 400
- Deleting NHRP 400
- Index-10 410
- Index-11 411
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