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Editing ATM Signaling and ILMI Parameters
9-33
Parameter: Xmit Sustainable Cell Rate (cells/s)
Default: 4716
Range: 300 to 365566 (ATM FRE2 OC-3 SONET/SDH ILI pairs)
0, 128 to 353207 (ATM ARE OC-3 SONET/SDH ILI pairs)
0, 128 to 96000 (ATM ARE DS-3 ILI pairs)
0, 128 to 80000 (ATM ARE E-3 ILI pairs; G832 Framing Mode)
0, 128 to 72000 (ATM ARE E-3 ILI pairs; G751 Framing Mode)
Function: Specifies the upper limit of the ATM connection conforming average rate.
The average rate equals the total number of cells transmitted divided by
the duration of the connection.
Using the sustainable cell rate (SCR), you can define the future cell flow
of a VC in greater detail than by just using the peak cell rate.
For ATM FRE2 ILI pairs, specifying the SCR controls the rate over time
— not at a specific instant of time — and can help you more efficiently
use your network resources.
For ATM ARE ILI pairs, the SCR maps directly to the minimum cell rate
(MCR). The MCR defines the minimum amount of guaranteed bandwidth
allowed for PVCs and Control VCs on the ATM line.
When setting the SCR for ATM FRE2 ILI pairs, keep the following in
mind:
• The SCR is essentially a future average. By setting the SCR you are
specifying the cell rate, over time, to which you want the VC to
conform.
• To be useful, the SCR must not exceed the PCR.
• If you know the user average rate, set the SCR about 10 percent
higher than this value.
• ATM FRE2 ILI pairs require a minimum SCR value of 300 cells/s.
PVCs may fail to operate with SCR values less than 300 cells/s.
When setting the SCR for ATM ARE ILI pairs, keep the following in
mind:
• The SCR maps directly to the MCR.
• The MCR provides guaranteed bandwidth for PVCs and Control VCs
while allowing sufficient bandwidth for SVCs to operate.
• To be useful, the SCR must not exceed the PCR.
- Configuring ATM Services 1
- Bay Networks Software License 3
- (continued) 4
- Contents 5
- About This Guide 19
- CompuServe 21
- InfoFACTS 21
- How to Get Help 22
- Conventions 22
- Acronyms 23
- Chapter 1 27
- ATM Overview 27
- Cell Header 28
- Cell Information Field 29
- ATM Layers 30
- Data Transmission 33
- ATM DXI versus ATM 34
- For More Information 35
- Chapter 2 37
- ATM DXI Support 38
- AAL Sublayer Support 39
- ATM DXI LMI Support 40
- ATM DXI Error Checking 40
- ATM DXI Implementation Notes 41
- ATM DXI Modes of Operation 42
- Group Access Mode 44
- Direct Access Mode 45
- Hybrid Access Mode 45
- Site A Site B 47
- Multipath Support 48
- Chapter 3 51
- Enabling ATM DXI Service 51
- Click on Add 55
- Chapter 4 59
- Editing ATM DXI Parameters 59
- 64
- Configuring PVCs 65
- 73
- 74
- Deleting PVCs 82
- Chapter 5 85
- ATM Support 86
- Multiprotocol Encapsulation 87
- ARP and Inverse ARP Support 88
- LAN Emulation 88
- ATM Signaling 89
- ATM Error Checking 90
- ATM Implementation Notes 91
- Hybrid Access 94
- SVC Access Methods 96
- ATM Traffic Parameters 96
- Converting Mb/s to Cells/s 97
- Variable Bit Rate 98
- Available Bit Rate 98
- Configuring ATM Services 100
- Maximum Burst Size 101
- Chapter 6 103
- Enabling ATM Service 103
- Enabling Overview 104
- Adding an ATM Circuit 104
- Click on OK 105
- Adding a Service Record 109
- Figure 6-4) 110
- 2. Click on Add 111
- 2. Click on OK 116
- Adding PVCs 118
- Chapter 7 121
- ATM Editing Basics 121
- Accessing ATM Windows 122
- Configuring 124
- Line Services 124
- Selecting Service Attributes 126
- Selecting Line Attributes 131
- Selecting ATM Signaling 132
- Selecting SAAL Attributes 134
- Selecting ILMI Attributes 136
- Assigning Data Encapsulation 138
- LANE 802.3 139
- LLC/SNAP Encapsulation 139
- Encapsulation Rules for PVCs 140
- Using ATM Protocol Menus 141
- Deleting Individual PVCs 149
- Click on PVC 150
- Click on Delete 150
- Site Manager deletes the PVC 150
- Deleting Individual SVCs 151
- Deleting ATM from the Router 154
- Chapter 8 155
- Editing Service Attributes 156
- Adding Service Records 157
- Figure 8-1) 158
- 162
- 163
- Adding or Copying PVCs 167
- Copying a PVC 169
- 7. Click on OK 170
- Editing PVC Parameters 172
- 8. Click on OK 174
- 183
- 183
- Chapter 9 195
- Click on Apply 210
- 216
- Editing ILMI Attributes 220
- Appendix A 231
- Appendix B 239
- ATM LAN Emulation Overview 239
- LAN Emulation Components 240
- LAN Emulation Server 241
- Broadcast and Unknown Server 241
- Initial State 243
- LECS Connect State 243
- Configure State 243
- Join State 243
- Initial Registration State 244
- BUS Connect State 244
- Operational State 244
- Appendix C 245
- ATM Address Resolution 247
- Adding an Adjacent Host 256
- 258
- Deleting an Adjacent Host 260
- Appendix D 265
- Sample ATM Network 265
- Hardware Devices 267
- Role of the CMS 269
- Role of the MCS 269
- Role of the ATM NMA 270
- Click on Service Attributes 271
- 10. Click on OK 274
- Appendix E 275
- ATM Sample Log 275
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