Avaya Configuring Dial Services Bedienungsanleitung Seite 46
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Configuring Dial Services
1-18
117353-B Rev. 00
• A-bit notification (Single frame relay PVC primary/PPP backup)
If only one frame relay PVC is being backed up by PPP, the router performs
circuit backup. For circuit backup, the frame relay service provider must
support A-bit notification, which tells the router the status of the PVC. This
enables the router to back up the PVC if it fails. Without A-bit notification, the
remote side of the PVC is never notified when the local side of the PVC has
terminated, making dial backup service impossible.
Backup Lines and Pools
A backup line is an alternate line that carries data if the primary line fails. It is
advantageous, therefore, to have one or more backup lines to ensure data
transmission. To assign one or more backup lines to a primary line, you establish a
backup pool.
A backup pool is a collection of lines that the primary circuits can use. Each
backup pool is identified by a backup pool ID.
The lines in a backup pool can reside in any slot on the router that supports WAN
lines; therefore, the pool can span multiple slots. Lines in a backup pool can
connect to a modem, directly to a PSTN (using the ARN with the V.34 Modem
Adapter Module), or directly to an ISDN network (using a router with integral
ISDN capability).
You can combine asynchronous, synchronous, and ISDN interfaces in a single
pool. The synchronous interfaces can use Raise DTR or V.25bis signaling for
modem connections. The asynchronous interfaces can use Raise DTR, V.25bis, or
Hayes signaling for modem connections. Hayes signaling requires that you use AT
modem commands to send dialing instructions to the modem. The ISDN lines use
ISDN signaling for network connections.
- Configuring 1
- Dial Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 117353-B Rev. 00 10
- About This Guide 23
- Before You Begin 24
- Conventions 24
- Acronyms 25
- Bay Networks Customer Service 27
- How to Get Help 27
- Chapter 1 29
- Dial Services Overview 29
- How to Use This Guide 30
- Bay Networks Dial Services 31
- Dial-on-Demand Service 33
- Demand Lines and Pools 34
- Demand Circuit Protocols 36
- Activating Demand Circuits 38
- Terminating Demand Circuits 39
- Dial Backup Service 42
- Figure 1-8 44
- Backup Lines and Pools 46
- Activating the Backup Line 48
- Bandwidth-on-Demand Service 50
- Terminating Secondary Lines 54
- Chapter 2 57
- Starting Dial Services 57
- Setting Up a Dial Service 58
- Appendix A of this guide 61
- (Figure 2-1) 61
- Configuring Line Pools 62
- Configuring BRI Lines 64
- Configuring PRI Lines 66
- Configuring WAN Line 67
- Services 67
- Adding ISDN Lines to a Pool 68
- Configuring Circuits 70
- Enabling a Protocol 73
- Creating Dial Backup Circuits 74
- Specifying the Backup Mode 75
- Creating Bandwidth Circuits 77
- Specifying the Bandwidth Mode 78
- Chapter 3 87
- Starting Dial Backup 87
- Configuring WAN Line Services 89
- DS0036A 91
- Create a Dial Object 94
- Create a Backup Line Pool 95
- Add a Backup Line to the Pool 96
- Configure BRI Lines 97
- Configure PRI Lines 99
- Specify the ISDN Switch Type 100
- Configuring Dial Services 102
- What to Do Next 105
- Chapter 4 107
- ISDN Overview 107
- ISDN Standards 108
- Primary Rate Interface 109
- The D Channel 109
- Figure 4-3. LAPD Frame 110
- ISDN Interfaces 111
- Reference Points 112
- Chapter 5 115
- Implementation Notes 115
- Types of Authentication 116
- Asynchronous PPP 120
- RADIUS Accounting Services 123
- ISDN Services 123
- Incoming Call Filtering 129
- Rate Adaption 130
- Example 2 131
- Chapter 6 135
- How Standby Circuits Work 137
- Callback 142
- Configuring Callback 143
- Demand Circuit Groups 145
- Static Routes 149
- Dial Optimized Routing 149
- Data Compression 153
- PPP Multilink 154
- Protocol Prioritization 154
- Chapter 7 157
- Bandwidth for Backup Circuits 158
- Chapter 8 163
- Multilink Fragmentation 166
- How BAP Works 167
- Chapter 9 173
- Customizing Line Pools 173
- Modifying Line Pools 174
- Changing Pool IDs 175
- Deleting Pools 175
- For example: 176
- To delete any type of pool: 176
- Using the BCC 177
- Using Site Manager 178
- Modifying the Line Priority 184
- Using Modem Factory Defaults 186
- Selecting a Modem Type 194
- Remotely Resetting the Modem 200
- Enabling RFC 1661 Compliance 205
- Modifying ISDN Configurations 206
- Modifying the Adaption Rate 213
- To modify the X.25 circuit: 224
- Deleting BRI 228
- Deleting PRI 229
- Chapter 10 231
- Customizing Demand Circuits 231
- Removing Demand Circuits 246
- Chapter 11 247
- Customizing Backup Circuits 247
- <ID_number> 249
- <mode> 249
- Frame Relay Services 250
- Specifying the Redial Count 263
- (continued) 265
- To remove backup service: 270
- Chapter 12 271
- Chapter 13 281
- Customizing Phone Lists 281
- Caution: 282
- Local Phone Lists 283
- Adding Phone Numbers 284
- To set the adaption rate: 293
- Changing the Remote Pool Type 294
- To set the connection type: 296
- Enabling PRI Multirate 297
- To enable PRI multirate: 298
- To create a local phone list: 305
- Chapter 14 309
- Customizing Caller Resolution 309
- Appendix A 315
- Dial Service Parameters 315
- Pool ID Parameter 318
- External Modem Parameters 323
- V.34 Modem Parameters 329
- ISDN Switch Parameters 334
- BRI Configuration Parameters 341
- Relay window is similar 346
- Local Phone Number Parameters 403
- Appendix B 423
- Configuration Examples 423
- Dial-on-Demand with PPP 424
- Table B-3. IP Parameters 426
- Configuration of Router 1 429
- Configuration of Router 2 429
- Demand Circuit Configuration 431
- Table B-13. IP Parameters 432
- Appendix C 453
- Show Commands for Dial Backup 453
- Sample Output 454
- Online Help for show Commands 454
- Commands for Dial Backup 455
- show dial backup summary 456
- >] [-circuit < 457
- Line Information: (Serial) 458
- Appendix D 465
- Ordering PRI Lines 466
- Appendix E 467
- (continued) 469
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