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Configuring Dial Services
1-12 114062 Rev. A
In Figure 1-7, if the Frame Relay link fails at router R1, the router activates a
backup connection through the ISDN network then back through the Frame Relay
network to the destination. The backup connection to the Frame Relay network
uses a different network interface and PVCs than the primary connection. Once
the primary line recovers and the Frame Relay switch responds to router R1’s
Data Link Control Management Interface (DLCMI) status requests, router R1
terminates the backup connection.
Knowing When the Primary Line Failed
The router “knows” that a primary line failed in one of three ways, depending on
the protocol for the primary and backup circuits:
• No Breath of Life (BofL) messages in the BofL time period
(Standard and PPP)
For Standard and PPP, Site Manager automatically enables BofL messages on
each primary circuit and disables them on each backup circuit. BofL
messages verify that the line is operational. The router determines the primary
failed when the it stops receiving packets within the BofL time period.
You configure the BofL timer with the synchronous line parameter BofL
Timeout. See Configuring Line Services for more information.
• No DLCMI messages (Frame Relay primary/Frame Relay backup)
When Frame Relay is the protocol for the backup circuit, the router performs
link backup. For link backup, the router knows that the primary failed when it
no longer receives DLCMI messages from the switch. These messages
communicate information about the interface and the status of each PVC.
The router may also rely on modem signals to determine if the primary circuit
failed. If you rely on modem signals, you must set the Sync Polling parameter
to Enable. This instructs the router to monitor modem signals. Refer to
Configuring Line Services for more information about the Sync Polling
parameter. In addition, you must use the proper synchronous cable for
connection to the primary line’s modem or CSU/DSU. Refer to the Cable
Guide for Routers and BNX Platforms.
Note: A primary circuit cannot use link and circuit backup simultaneously.
- Configuring Dial 1
- Services 1
- Bay Networks Software License 3
- Contents 5
- 114062 Rev. A vii 7
- 114062 Rev. A ix 9
- 114062 Rev. A 10
- 114062 Rev. A xi 11
- 114062 Rev. A xiii 13
- 114062 Rev. A xv 15
- 114062 Rev. A xvii 17
- About This Guide 19
- Audience 20
- Before You Begin 20
- Conventions 21
- Acronyms 22
- 114062 Rev. A xxiii 23
- 114062 Rev. A xxv 25
- Bay Networks Customer Service 26
- World Wide Web 27
- Customer Service FTP 27
- Support Source CD 28
- CompuServe 28
- InfoFACTS 29
- How to Get Help 29
- Chapter 1 31
- Dial Services Overview 31
- DS0005A 32
- Dial-on-Demand Service 33
- Demand Lines and Pools 34
- 192.32.14.0 35
- 192.32.16.0 35
- Activating Demand Circuits 36
- Terminating Demand Circuits 38
- Dial Backup Service 39
- Primary Line 40
- Backup Line 40
- 1-12 114062 Rev. A 42
- Backup Lines and Pools 43
- 1-14 114062 Rev. A 44
- Activating the Backup Line 45
- 1-16 114062 Rev. A 46
- Bandwidth-on-Demand Service 47
- 1-18 114062 Rev. A 48
- Activating Secondary Lines 50
- Terminating Secondary Lines 50
- Chapter 2 53
- ISDN Overview 53
- ISDN Standards 54
- Primary Rate Interface 55
- The D Channel 55
- 2-4 114062 Rev. A 56
- Figure 2-3. LAPD Frame 56
- ISDN Interfaces 57
- Reference Points 58
- 2-8 114062 Rev. A 60
- Chapter 3 61
- Implementation Notes 61
- Types of Authentication 62
- 114062 Rev. A 3-3 63
- 3-4 114062 Rev. A 64
- Asynchronous PPP 66
- ISDN Services 68
- 114062 Rev. A 3-9 69
- 3-10 114062 Rev. A 70
- 114062 Rev. A 3-11 71
- 3-12 114062 Rev. A 72
- 114062 Rev. A 3-13 73
- Call Screening 74
- Rate Adaption 74
- Example 1 75
- Example 2 75
- 3-16 114062 Rev. A 76
- Chapter 4 77
- PPP Multilink 78
- Static Routes 79
- Traffic Filters 80
- Dial Optimized Routing 81
- 4-6 114062 Rev. A 82
- Protocol Prioritization 83
- Chapter 5 85
- Bandwidth for Backup Circuits 86
- 114062 Rev. A 5-3 87
- 5-4 114062 Rev. A 88
- 114062 Rev. A 5-5 89
- 5-6 114062 Rev. A 90
- 114062 Rev. A 5-7 91
- 5-8 114062 Rev. A 92
- Chapter 6 93
- 6-2 114062 Rev. A 94
- 6-4 114062 Rev. A 96
- 114062 Rev. A 6-5 97
- Chapter 7 99
- Caution: 100
- Pool ID Parameter 107
- Configuring Dial Services 108
- Creating Line Pools 109
- Adding Line Pools 110
- Configuring ISDN Lines 115
- PRI Physical Interfaces 117
- 7-20 114062 Rev. A 118
- 7-22 114062 Rev. A 120
- 7-24 114062 Rev. A 122
- 123
- 124
- 126
- 128
- 129
- 7-32 114062 Rev. A 130
- 131
- 7-34 114062 Rev. A 132
- 137
- 7-40 114062 Rev. A 138
- 7-42 114062 Rev. A 140
- Configuring ISDN Logical Lines 141
- 7-44 114062 Rev. A 142
- 7-46 114062 Rev. A 144
- 114062 Rev. A 7-47 145
- 7-48 114062 Rev. A 146
- 7-50 114062 Rev. A 148
- Local Phone Number Parameters 149
- 7-52 114062 Rev. A 150
- 114062 Rev. A 7-53 151
- Changing Pool IDs and Lines 153
- 114062 Rev. A 7-57 155
- 7-58 114062 Rev. A 156
- 114062 Rev. A 7-59 157
- 7-60 114062 Rev. A 158
- 114062 Rev. A 7-63 161
- 114062 Rev. A 7-65 163
- Chapter 8 165
- Configuring Demand Circuits 165
- Interface for Dialup Lines 167
- Demand Circuit Parameters 169
- Configuring Demand Circuits 171
- 184
- Deleting Demand Circuits 186
- 114062 Rev. A 8-23 187
- 8-24 114062 Rev. A 188
- 4. Click on OK to save 188
- 8-26 114062 Rev. A 190
- 8-28 114062 Rev. A 192
- 114062 Rev. A 8-29 193
- Chapter 9 197
- Configuring Backup Circuits 197
- Circuit Options Parameters 202
- Configuring Backup Circuits 205
- Interface Type Parameter 211
- 219
- 219
- 220
- 9-26 114062 Rev. A 222
- 9-28 114062 Rev. A 224
- 227
- 228
- 228
- 9-34 114062 Rev. A 230
- 114062 Rev. A 9-35 231
- (Figure 232
- Deleting Backup Circuits 234
- Chapter 10 235
- Congestion Monitor Parameters 247
- Deleting Bandwidth Circuits 255
- Chapter 11 257
- Configuring Phone Lists 257
- Configuring Phone Lists 263
- Chapter 12 273
- Configuring Caller Resolution 273
- Configuring Caller Resolution 277
- Appendix A 281
- Configuration Examples 281
- Dial-on-Demand Using PPP 282
- Table A-3. IP Parameters 284
- A-4 114062 Rev. A 284
- Phone List window 285
- A-6 114062 Rev. A 286
- Configuration of Router 1 287
- Configuration of Router 2 288
- Configuration Examples 289
- Table A-10. Demand Pools 289
- A-10 114062 Rev. A 290
- Table A-14. IP Parameters 291
- A-12 114062 Rev. A 292
- A-16 114062 Rev. A 296
- Table A-23. IP Parameters 297
- A-20 114062 Rev. A 300
- Table A-26. Backup Pools 300
- A-22 114062 Rev. A 302
- Appendix B 305
- B-4 114062 Rev. A 308
- B-6 114062 Rev. A 310
- B-8 114062 Rev. A 312
- Appendix C 313
- Ordering PRI Lines 314
- 114062 Rev. A Index-1 315
- 114062 Rev. A Index-3 317
- 114062 Rev. A Index-5 319
- 114062 Rev. A Index-7 321
- 114062 Rev. A Index-9 323
- 114062 Rev. A Index-11 325
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