Avaya Dial User Manual

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Conﬁguring Dial Services

Router Software Version 11.02 Site Manager Software Version 5.02

Part No. 114062 Rev. B May 1997

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4401 Great America Parkway 8 Federal Street Santa Clara, CA 95054 Billerica, MA 01821

and recommendations in this document are believed to be accurate and reliable, but are presented without express or implied warranty . Users must take full responsibility for their applications of an y products speciﬁed in this document. The information in this document is proprietary to Bay Networks, Inc.

The software described in this document is furnished under a license agreement and may only be used in accordance with the terms of that license. A summary of the Software License is included in this document.

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Notice for All Other Executive Agencies

Notwithstanding any other license agreement that may pertain to, or accompany the delivery of, this computer software, the rights of the United States Government regarding its use, reproduction, and disclosure are as set forth in the Commercial Computer Software-Restricted Rights clause at FAR 52.227-19.

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ACE, AFN, AN, BCN, BLN, BN, BNX, CN, FN, FRE, GAME, LN, Optivity, PPX, Bay Networks, SynOptics, SynOptics Communications, Wellﬂeet and the Wellﬂeet logo are registered trademarks and ANH, ASN, BaySIS, BayStack, BayStream, BCNX, BLNX, EZ Install, EZ Internetwork, EZ LAN, PathMan, PhonePlus, Quick2Conﬁg, RouterMan, SPEX, Bay Networks Press, the Bay Networks logo and the SynOptics logo are trademarks of Bay Networks, Inc.

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Statement of Conditions

In the interest of improving internal design, operational function, and/or reliability, Bay Networks, Inc. reserves the right to make changes to the products described in this document without notice.

Bay Networks, Inc. does not assume any liability that may occur due to the use or application of the product(s) or circuit layout(s) described herein.

Portions of the code in this software product are Copyright © 1988, Regents of the Univ ersity of California. All rights reserved. Redistribution and use in source and binary forms of such portions are permitted, provided that the above copyright notice and this paragraph are duplicated in all such forms and that any documentation, advertising materials, and other materials related to such distribution and use acknowledge that such portions of the software were developed by the University of California, Berkeley. The name of the University may not be used to endorse or promote products derived from such portions of the software without speciﬁc prior written permission.

SUCH PORTIONS OF THE SOFTWARE ARE PROVIDED “AS IS” AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

In addition, the program and information contained herein are licensed only pursuant to a license agreement that contains restrictions on use and disclosure (that may incorporate by reference certain limitations and notices imposed by third parties).

114062 Rev. B

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Bay Networks Software License

This is Bay Networks basic license document. In the absence of a

Note:

software license agreement specifying varying terms, this license -- or the license included with the particular product -- shall govern licensee’s use of Bay Networks software.

This Software License shall govern the licensing of all software provided to licensee by Bay Networks (“Software”). Bay Networks will provide licensee with Software in machine-readable form and related documentation (“Documentation”). The Software provided under this license is proprietary to Bay Networks and to third parties from whom Bay Networks has acquired license rights. Bay Networks will not grant any Software license whatsoev er , either explicitly or implicitly, except by acceptance of an order for either Software or for a Bay Networks product (“Equipment”) that is packaged with Software. Each such license is subject to the following restrictions:

1. Upon delivery of the Software, Bay Networks grants to licensee a personal, nontransferable, none xclusiv e license to use the Software with the Equipment with which or for which it was originally acquired, including use at any of licensee’s facilities to which the Equipment may be transferred, for the useful life of the Equipment unless earlier terminated by default or cancellation. Use of the Software shall be limited to such Equipment and to such facility. Software which is licensed for use on hardware not offered by Bay Networks is not subject to restricted use on any Equipment, however, unless otherwise speciﬁed on the Documentation, each licensed copy of such Software may only be installed on one hardware item at any time.

2. Licensee may use the Software with backup Equipment only if the Equipment with which or for which it was acquired is inoperative.

3. Licensee may make a single copy of the Software (but not ﬁrmware) for safekeeping (archives) or backup purposes.

4. Licensee may modify Software (but not ﬁrmware), or combine it with other software, subject to the provision that those portions of the resulting software which incorporate Software are subject to the restrictions of this license. Licensee shall not make the resulting software available for use by any third party.

5. Neither title nor ownership to Software passes to licensee.

6. Licensee shall not provide, or otherwise make available, any Software, in whole or in part, in any form, to any third party. Third parties do not include consultants, subcontractors, or agents of licensee who have licensee’s permission to use the Software at licensee’s facility, and who have agreed in writing to use the Software only in accordance with the restrictions of this license.

7. Third-party owners from whom Bay Networks has acquired license rights to software that is incorporated into Bay Networks products shall have the right to enforce the provisions of this license against licensee.

8. Licensee shall not remove or obscure any copyright, patent, trademark, trade secret, or similar intellectual property or restricted rights notice within or afﬁxed to any Software and shall reproduce and afﬁx such notice on any backup copy of Software or copies of software resulting from modiﬁcation or combination performed by licensee as permitted by this license.

114062 Rev. B iii

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Bay Networks Software License

9. Licensee shall not reverse assemble, reverse compile, or in any way reverse engineer the Software. [Note: For licensees in the European Community, the Softw are Directiv e dated 14 May 1991 (as may be amended from time to time) shall apply for interoperability purposes. Licensee must notify Bay Networks in writing of any such intended examination of the Software and Bay Networks may provide review and assistance.]

10. Notwithstanding any foregoing terms to the contrary, if licensee licenses the Bay Networks product “Site Manager,” licensee may duplicate and install the Site Manager product as speciﬁed in the Documentation. This right is granted solely as necessary for use of Site Manager on hardware installed with licensee’s network.

11. This license will automatically terminate upon improper handling of Software, such as by disclosure, or Bay Networks may terminate this license by written notice to licensee if licensee fails to comply with any of the material provisions of this license and fails to cure such failure within thirty (30) days after the receipt of written notice from Bay Networks. Upon termination of this license, licensee shall discontinue all use of the Software and return the Software and Documentation, including all copies, to Bay Networks.

12. Licensee’s obligations under this license shall survive expiration or termination of this license.

(continued)

iv 114062 Rev. B

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About This Guide

Before You Begin ...........................................................................................................xxvi

Conventions ...................................................................................................................xxvi

Acronyms ......................................................................................................................xxvii

Ordering Bay Networks Publications ...........................................................................xxviii

Bay Networks Customer Service ...................................................................................xxix

How to Get Help ............................................................................................................xxix

For More Information ......................................................................................................xxx

Chapter 1 Getting Started

How to Use This Manual .................................................................................................1-1

Before You Begin ............................................................................................................1-2

Setting Up a Dial Service ...............................................................................................1-3

Conﬁguring Line Pools ....................................................................................................1-5

Creating Line Pools with Modem Lines ....................................................................1-5

Creating Line Pools with ISDN Lines .....................................................................1-11

Conﬁguring BRI Lines ............................................................................................1-11

Conﬁguring PRI Lines ............................................................................................1-12

Adding ISDN Lines to a Pool ..................................................................................1-16

Conﬁguring Circuits ......................................................................................................1-19

Creating Demand Circuits ............................................................................................1-19

Specifying the Authentication Protocol Information ................................................1-22

Specifying the Connection Mode ...........................................................................1-22

Enabling a Protocol ................................................................................................1-23

Creating Backup Circuits ..............................................................................................1-25

Specifying the Backup Mode ..................................................................................1-27

Specifying the Authentication Protocol Information ................................................1-27

Creating Bandwidth Circuits .........................................................................................1-28

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Conﬁguring Leased Circuits as Bandwidth Circuits ...............................................1-28

Specifying the Bandwidth Mode .............................................................................1-30

Specifying the Authentication Protocol ...................................................................1-32

Adding Bandwidth Service for Demand Lines ........................................................1-33

Creating an Outgoing Phone List .................................................................................1-36

Creating the Local Phone List (ISDN only) ...................................................................1-38

Setting Up the Caller Resolution Table .........................................................................1-40

What to Do Next ...........................................................................................................1-43

Chapter 2 Dial Services Overview

Bay Networks Dial Services ...........................................................................................2-1

Network Access Methods and Services ...................................................................2-3

Dial-on-Demand Service ................................................................................................2-4

Demand Lines and Pools .........................................................................................2-5

How Demand Lines, Pools, and Circuits Work Together ..........................................2-6

Demand Circuit Protocols ........................................................................................2-7

Conﬁguring Frame Relay to Work Optimally with Dial-on-Demand ..........................2-8

Activating Demand Circuits ......................................................................................2-9

Terminating Demand Circuits .................................................................................2-10

Bandwidth-on-Demand Service for Congested Demand Lines ..............................2-11

Dial Backup Service .....................................................................................................2-13

Circuit Backup versus Link Backup ........................................................................2-14

Knowing When the Primary Line Fails ...................................................................2-16

Backup Lines and Pools .........................................................................................2-17

How Backup Lines, Pools, and Circuits Work Together ..........................................2-18

Conﬁguration of the Backup Circuit ........................................................................2-19

Activating the Backup Line .....................................................................................2-19

Reestablishing the Backup Connection .................................................................2-20

Terminating the Backup Connection ......................................................................2-20

Bandwidth-on-Demand Service ....................................................................................2-21

Enabling Bandwidth-on-Demand Service ..............................................................2-21

Bandwidth-on-Demand Lines and Pools ................................................................2-23

How Lines, Pools, and Circuits Work Together .......................................................2-24

Activating Dial-up Lines to Relieve Congestion ......................................................2-24

Terminating Secondary Lines .................................................................................2-25

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Sample Bandwidth-on-Demand Application ...........................................................2-25

Using the Same Line for All Dial Services ....................................................................2-26

Chapter 3 ISDN Overview

ISDN Standards ..............................................................................................................3-2

Basic Rate Interface .................................................................................................3-2

Primary Rate Interface .............................................................................................3-3

The D Channel .........................................................................................................3-3

Link Access Procedure-D ..................................................................................3-3

Call Control on the D Channel ...........................................................................3-5

ISDN Interfaces ..............................................................................................................3-5

Functional Groups ....................................................................................................3-5

Reference Points ......................................................................................................3-6

For More Information about ISDN ...................................................................................3-8

Chapter 4 Implementation Notes for All Dial Services

Point-to-Point Protocol ....................................................................................................4-1

PPP Authentication ..................................................................................................4-1

Types of Authentication ............................................................................................4-2

Two-Way Authentication ....................................................................................4-2

One-Way Authentication ....................................................................................4-3

Conﬁguring the Type of Authentication ..............................................................4-4

Using CHAP Names and PAP IDs for Authentication ...............................................4-4

Asynchronous PPP .........................................................................................................4-6

Conﬁguring Modems for Asynchronous PPP Interfaces ..........................................4-7

RADIUS Accounting Services ........................................................................................4-8

IP Adjacent Hosts ...........................................................................................................4-9

ISDN Services ..............................................................................................................4-10

BRI Service on the AN, ANH, ASN, and ARN .......................................................4-11

B Channel Support ..........................................................................................4-11

D Channel Support ..........................................................................................4-11

BRI Leased-Line Operation for Germany and Japan ......................................4-12

BRI Subaddresses ...........................................................................................4-12

Floating B Option for the AN and ANH ............................................................4-12

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PRI Service on the ASN, BLN, and BCN ...............................................................4-13

B Channel Support ..........................................................................................4-13

D Channel Support ..........................................................................................4-14

Selective PRI Service ......................................................................................4-14

PRI Multirate ....................................................................................................4-15

Placing Multirate Calls .....................................................................................4-15

Incoming Call Filtering ...........................................................................................4-16

Rate Adaption ........................................................................................................4-16

X.25 Service over an ISDN D Channel (BRI only) .................................................4-18

Conﬁguring X.25 Service over the D Channel .................................................4-19

Using the ping Command for ISDN Connections ...................................................4-20

Chapter 5 Dial-on-Demand Implementation Notes

Standby Circuits .............................................................................................................5-1

Comparing Standby Circuits with Dial Backup Circuits ............................................5-2

How Standby Circuits Work ......................................................................................5-3

Guidelines for Conﬁguring Standby Circuits ............................................................5-4

Balancing Trafﬁc between a Primary Circuit and a Hot Standby Circuit ...................5-5

Using Schedules to Manage Standby Circuit Availability .........................................5-6

Conﬁguring Multiple Time of Day Schedules ...........................................................5-6

Callback ..........................................................................................................................5-8

Conﬁguring Callback ................................................................................................5-9

Modifying the Callback Mode Parameter .........................................................5-10

Callback and the Circuit’s Connection Mode ...................................................5-10

Using the Incoming Phone List for Callback Service .......................................5-11

Demand Circuit Groups ................................................................................................5-11

Demand Pools and Demand Circuit Groups ....................................................5-11

Caller Resolution for Demand Circuit Groups ..................................................5-12

Protocol Conﬁguration for Demand Circuit Groups .........................................5-13

Using Demand Circuit Groups with Dial Backup Service ................................5-13

RADIUS Authentication Services for Demand Circuit Groups ...............................5-14

Managing Broadcast Trafﬁc over Demand Circuits .......................................................5-14

Static Routes ..........................................................................................................5-15

Dial Optimized Routing ..........................................................................................5-15

What Happens When You Enable Dial Optimized Routing ..............................5-16

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Enabling Dial Optimized Routing for Frame Relay Demand Circuits ...............5-16

Exceptions for Sending Routing Updates ........................................................5-17

Maintaining the Routing Table ..........................................................................5-17

IP RIP Triggered Updates and Broadcast Timers ..................................................5-18

IPX RIP and SAP Broadcast Timers ......................................................................5-18

Trafﬁc Filters ...........................................................................................................5-19

Data Compression ........................................................................................................5-19

PPP Multilink ................................................................................................................5-20

Protocol Prioritization ...................................................................................................5-20

Chapter 6 Dial Backup Implementation Notes

Data Compression ..........................................................................................................6-1

Deﬁning the Role of the Router in the Network ..............................................................6-2

Bandwidth for Backup Circuits ........................................................................................6-2

Using Unnumbered Interfaces to Dial an Alternative Site ...............................................6-2

Sample Network Using Unnumbered Interfaces ......................................................6-3

Simplifying Unnumbered Conﬁgurations with Demand Circuit Groups ....................6-4

Sample Network Using Demand Circuit Groups ...............................................6-4

Chapter 7 Bandwidth-on-Demand Implementation Notes

Bandwidth-on-Demand Terminology ...............................................................................7-1

PPP Multilink ..................................................................................................................7-2

Multilink Fragmentation ............................................................................................7-3

PPP Bandwidth Allocation Protocol ................................................................................7-4

How BAP Works .......................................................................................................7-5

BAP Negotiation with Other Vendors’ Routers .........................................................7-6

Conﬁguring BAP ......................................................................................................7-6

Protocol Prioritization .....................................................................................................7-7

Deﬁning the Role of the Router in the Network ..............................................................7-7

Balancing Trafﬁc between Lines in a Multilink Bundle ....................................................7-7

Ensuring the Accuracy of the Congestion Thresholds ....................................................7-8

Testing the Bandwidth-on-Demand Connection .............................................................7-8

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Chapter 8 Customizing Line Pools

Adding Line Pools ...........................................................................................................8-1

Changing Pool IDs ..........................................................................................................8-2

Deleting Pools .................................................................................................................8-3

Modifying the WAN Serial Interface Type and Line Media Type ......................................8-4

Modifying Modem Conﬁgurations ...................................................................................8-6

Selecting a Modem (Hayes only) .............................................................................8-8

Modifying Modem Initialization Commands ..............................................................8-9

Modifying How the Modem Connects to the Network ............................................8-10

Removing a Dial Service from a Modem Line ........................................................8-11

Modifying ISDN Conﬁgurations ....................................................................................8-12

Modifying BRI Signaling over the D Channel .........................................................8-12

Modifying the MCT1 and MCE1 Port Conﬁgurations .............................................8-14

Changing PRI Timeslots ........................................................................................8-15

Modifying the ISDN Pool Channel Count and Priority ............................................8-16

Modifying the ISDN Switch Type ............................................................................8-18

Enabling Incoming Call Filtering .............................................................................8-19

Modifying the Adaption Rate ..................................................................................8-19

Informing the Switch That Call Setup Is Complete .................................................8-20

Conﬁguring X.25 over a D Channel (BRI only) ......................................................8-20

Disabling X.25 over the D Channel ........................................................................8-21

Modifying the BRI Line that Uses X.25 Service over the D Channel .....................8-22

Modifying the X.25 Circuit for Service over the D Channel ....................................8-23

Conﬁguring a BRI Leased Line (Germany and Japan only) ..................................8-24

Modifying BRI Leased-Line Conﬁgurations ............................................................8-26

Removing B Channels from a Pool ........................................................................8-27

Removing BRI and PRI from the Router ......................................................................8-28

Removing BRI .................................................................................................8-28

Removing PRI .................................................................................................8-29

Chapter 9 Customizing Demand Circuits

Conﬁguring Frame Relay Demand Circuits ....................................................................9-2

Modifying the Frame Relay Interface ........................................................................9-5

Modifying Frame Relay Service Records .................................................................9-6

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Adding Protocols to Frame Relay Demand Circuits .................................................9-8

Customizing PPP and Frame Relay Demand Circuits ..................................................9-10

Changing the Default Authentication Protocol (PPP only) ............................................9-11

Bandwidth-on-Demand Service for Demand Lines (PPP only) ....................................9-12

Adding Protocols to PPP Demand Circuits ...................................................................9-12

Scheduling When the Demand Circuit Is Available .......................................................9-13

Conﬁguring Demand Circuit Groups .............................................................................9-16

Caller Resolution Information for Demand Circuit Groups .....................................9-17

Modifying the Demand Circuit Group Conﬁguration ...............................................9-20

Modifying the Number of Circuits in a Demand Circuit Group .........................9-20

Modifying the Demand Pool That the Demand Circuit Group Uses .................9-21

Removing a Demand Circuit Group .................................................................9-22

Removing Demand Circuits ..........................................................................................9-23

Chapter 10 Customizing Backup Circuits

Creating a PPP Backup Circuit for One Frame Relay PVC ..........................................10-2

Creating Frame Relay Backup Circuits for Multiple PVCs ............................................10-5

Modifying the Frame Relay Backup Interface .........................................................10-7

Modifying Frame Relay Service Records ...............................................................10-9

Conﬁguring Filters for Backup Conﬁgurations ......................................................10-12

Conﬁguring Filters for Primary/Secondary Interfaces ....................................10-12

Conﬁguring Filters for Primary/Shared Interfaces .........................................10-13

Customizing PPP and Frame Relay Backup Circuits .................................................10-14

Changing the Authentication Protocol for the Primary Circuit ....................................10-14

Scheduling When the Backup Circuit Is Available ......................................................10-15

Removing PPP or Frame Relay Backup Service ........................................................10-17

Chapter 11 Customizing Bandwidth-on-Demand Circuits

Customizing Bandwidth-on-Demand Service ...............................................................11-2

Changing the Authentication Protocol ..........................................................................11-3

Monitoring Congestion on the Bandwidth or Demand Circuit .......................................11-4

Setting the Preferred and Reserved Slots ..............................................................11-7

Setting the Preferred and Reserved Slots For BAP ...............................................11-8

Modifying Multilink Fragmentation ..........................................................................11-9

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Enabling BAP for Bandwidth-on-Demand Service .....................................................11-10

Removing Bandwidth-on-Demand Service .................................................................11-13

Chapter 12 Customizing Phone Lists

Types of Phone Lists ....................................................................................................12-1

How ISDN Calls Use Phone Lists .................................................................................12-2

Outgoing and Incoming Phone Lists ......................................................................12-2

Local Phone Lists ...................................................................................................12-2

How V.25bis and Hayes Calls Use the Outgoing Phone List ........................................12-2

Creating an Outgoing Phone List .................................................................................12-3

Modifying the Outgoing Phone List ...............................................................................12-7

Enabling PRI Multirate ...........................................................................................12-8

Creating an Incoming Phone List (ISDN only) ..............................................................12-9

Modifying the Incoming Phone List .............................................................................12-11

Creating a Local Phone List (ISDN only) ....................................................................12-12

Chapter 13 Customizing Caller Resolution

Caller Resolution for Demand Circuit Groups ...............................................................13-1

Adding Entries to the Caller Resolution Table ..............................................................13-2

Modifying Entries in the Caller Resolution Table ..........................................................13-6

Appendix A Dial Service Parameters

Pool ID Parameter ................................................................................................... A-4

WAN Serial Interface Type Parameter ..................................................................... A-4

Sync and Async Line Media Type Parameters ........................................................ A-5

External Modem Parameters .................................................................................. A-7

V.34 Modem Parameters ....................................................................................... A-12

BRI Port Application Mode Parameter .................................................................. A-15

PRI Port Application Mode Parameter .................................................................. A-16

ISDN Switch Parameters ...................................................................................... A-16

Pool Channel Count and Priority Parameters ....................................................... A-20

BRI Conﬁguration Parameters .............................................................................. A-22

Demand Circuit Parameters (PPP and Frame Relay) ........................................... A-26

Standby Circuit Parameters (PPP Demand Circuits only) ..................................... A-32

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Callback Parameters (PPP Demand Circuits only) ............................................... A-34

Authentication Protocol Parameters (Demand, Backup, Bandwidth) .................... A-37

Circuit Duration Parameters (Demand and Backup) ............................................. A-42

Circuit Schedule Parameters (Demand and Dial Backup) .................................... A-45

Demand Circuit Group Parameters ....................................................................... A-49

Caller Resolution Info Parameters for Demand Circuit Groups ............................. A-50

Demand Circuit Group Protocol Parameters ......................................................... A-52

PPP Circuit Options Parameters (Dial Backup) .................................................... A-55

PPP Primary Circuit Deﬁnition Parameters (Dial Backup) .................................... A-56

Frame Relay Interface Type Parameter (Dial Backup) .......................................... A-57

Frame Relay Primary Interface Deﬁnition Parameters (Dial Backup) ................... A-59

Frame Relay Interface Parameters (Demand and Dial Backup) ........................... A-60

Service List Parameter (Demand and Dial Backup) .............................................. A-69

Frame Relay PVC Parameters (Demand and Dial Backup) .................................. A-70

Bandwidth-on-Demand Circuit Options Parameters ............................................. A-75

Bandwidth-on-Demand Circuit Deﬁnition Parameters ........................................... A-77

Bandwidth-on-Demand Congestion Monitor Parameters ...................................... A-78

Bandwidth Allocation Protocol (BAP) Parameters ................................................ A-84

Local Phone Number Parameters ......................................................................... A-85

Outgoing Phone List Parameters .......................................................................... A-88

Phone Number Parameters (Outgoing) ................................................................ A-96

Incoming Phone List Parameters ........................................................................ A-101

Phone Number Parameters (Incoming) .............................................................. A-102

Caller Resolution Table Parameters .................................................................... A-103

Appendix B Conﬁguration Examples

Dial-on-Demand with PPP ............................................................................................. B-2

Conﬁguration of Routers 4 and 7 ............................................................................ B-3

Demand Pool Conﬁguration .............................................................................. B-3

Demand Circuit Conﬁguration .......................................................................... B-4

Outgoing Phone List Conﬁguration ................................................................... B-5

Caller Resolution Table Conﬁguration ............................................................... B-5

Dial-on-Demand for an ISDN Network .......................................................................... B-6

Conﬁguration of Router 1 ........................................................................................ B-6

Conﬁguration of Router 2 ........................................................................................ B-7

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Port Application Mode Conﬁguration ................................................................ B-7

Demand Pool Conﬁguration .............................................................................. B-8

Demand Circuit Conﬁguration .......................................................................... B-9

Outgoing Phone List ......................................................................................... B-9

Protocol Conﬁguration .................................................................................... B-10

Caller Resolution Table Conﬁguration ............................................................. B-11

Local Phone Number Conﬁguration ............................................................... B-11

Dial Backup with PPP on the Primary Line ................................................................. B-12

Conﬁguration of Router 1 ...................................................................................... B-12

Conﬁguration of Router 2 ...................................................................................... B-13

Backup Pool Conﬁguration ............................................................................. B-13

Backup Circuit Conﬁguration .......................................................................... B-14

Outgoing Phone List Conﬁguration ................................................................. B-15

Caller Resolution Table Conﬁguration ............................................................. B-16

Dial Backup with Standard on the Primary Line .......................................................... B-17

Dial Backup over an ISDN Network ............................................................................. B-18

Conﬁguration of Router 1 ...................................................................................... B-18

Conﬁguration of Router 2 ...................................................................................... B-19

Port Application Mode Conﬁguration .............................................................. B-19

Backup Pool Conﬁguration ............................................................................. B-20

Backup Circuit Conﬁguration .......................................................................... B-20

Outgoing Phone List ....................................................................................... B-22

Caller Resolution Table Conﬁguration ............................................................. B-22

Local Phone Number Conﬁguration ............................................................... B-23

Conﬁguring Dial Backup with Standard or Frame Relay ................................. B-23

Appendix C Dial Services Parameter Defaults

Appendix D Ordering ISDN Lines in the United States

Ordering BRI Lines ........................................................................................................D-1

Ordering PRI Lines ........................................................................................................D-2

Appendix E AT Initialization Commands for the ARN

Index

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Figures

Figure 1-1. Dialup Menu from the Conﬁguration Manager Window ...........................1-5

Figure 1-2. Demand Pools Window ............................................................................1-6

Figure 1-3. Demand Pool Conﬁguration Window .......................................................1-6

Figure 1-4. Demand Lines Deﬁnition Window for a Backbone Link Node ..................1-7

Figure 1-5. Choose WAN Serial Interface Type Window ............................................1-8

Figure 1-6. Sync Line Media Type Window ................................................................1-9

Figure 1-7. Async Line Media Type Window ...............................................................1-9

Figure 1-8. Port Application Window ........................................................................1-11

Figure 1-9. Clock Parameters Window .....................................................................1-12

Figure 1-10. MCT1 Port Parameters Window .............................................................1-13

Figure 1-11. PRI Logical Lines Window .....................................................................1-14

Figure 1-12. MCT1 Timeslots Window .......................................................................1-15

Figure 1-13. Menu for PRI Timeslot ...........................................................................1-15

Figure 1-14. ISDN Switch Conﬁguration Window .......................................................1-17

Figure 1-15. ISDN Logical Lines Window ...................................................................1-18

Figure 1-16. Demand Pools Window Listing Conﬁgured Pools ..................................1-19

Figure 1-17. PPP Demand Circuits Window ...............................................................1-20

Figure 1-18. Completed PPP Demand Circuits Window ............................................1-21

Figure 1-19. Select Protocols Window .......................................................................1-23

Figure 1-20. Primary Circuit Deﬁnition Window ..........................................................1-25

Figure 1-21. Circuit Options Window ..........................................................................1-26

Figure 1-22. Bandwidth-on-Demand Circuit Deﬁnition Window .................................1-29

Figure 1-23. Circuit Options Window ..........................................................................1-29

Figure 1-24. Preferred/Reserved Slots for BOD Pool Window ...................................1-31

Figure 1-25. PPP Demand Circuits Window ...............................................................1-33

Figure 1-26. Enter a BOD Pool Window .....................................................................1-34

Figure 1-27. BOD Conﬁguration Window ...................................................................1-35

Figure 1-28. Outgoing Phone List Window .................................................................1-36

Figure 1-29. Phone Number Window .........................................................................1-37

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Figure 1-30. ISDN Local Phone Lines Window ..........................................................1-38

Figure 1-31. ISDN Local Phone Numbers Window ....................................................1-39

Figure 1-32. Phone Number Window .........................................................................1-39

Figure 1-33. Caller Resolution Table Window .............................................................1-41

Figure 1-34. Caller Name and Secret/Password Window ..........................................1-41

Figure 1-35. Local Circuit List Window .......................................................................1-42

Figure 2-1. Example of Dial Access to a Switched Telephone Network .....................2-2

Figure 2-2. Dial-on-Demand Service ..........................................................................2-5

Figure 2-3. Example of Demand Lines, Pools, and Circuits .......................................2-6

Figure 2-4. Dial-on-Demand Connection over a Frame Relay Network .....................2-7

Figure 2-5. Additional Lines for a Dial-on-Demand Connection ...............................2-12

Figure 2-6. PPP Backup over a PSTN .....................................................................2-14

Figure 2-7. PPP Backup over an ISDN Network ......................................................2-15

Figure 2-8. Link Backup for a Frame Relay Network ................................................2-15

Figure 2-9. Example of Backup Pools, Lines, and Circuits .......................................2-18

Figure 2-10. An Example of Bandwidth-on-Demand Service .....................................2-22

Figure 2-11. Sample Bandwidth-on-Demand Network ...............................................2-25

Figure 3-1. Sample ISDN Network .............................................................................3-1

Figure 3-2. The BRI Interface .....................................................................................3-2

Figure 3-3. LAPD Frame ............................................................................................3-4

Figure 3-4. Reference Points and Functional Groups for Devices .............................3-7

Figure 3-5. Reference Points and Functional Groups for Non-ISDN Devices ............3-7

Figure 4-1. Two-Way Authentication ...........................................................................4-2

Figure 4-2. One-Way Authentication ..........................................................................4-3

Figure 4-3. Routers Using CHAP for Authentication ..................................................4-4

Figure 4-4. Using Asynchronous PPP over Modem Lines .........................................4-6

Figure 4-5. IP Adjacent Hosts ....................................................................................4-9

Figure 4-6. Router in an ISDN Network ...................................................................4-10

Figure 4-7. Rate Adaption for a Network with a 56 Kb/s Trunk Line .........................4-17

Figure 4-8. Rate Adaption for a Switched 56 Kb/s Network .....................................4-17

Figure 4-9. X.25 over the D Channel ........................................................................4-19

Figure 5-1. Example of Callback over a Demand Circuit ............................................5-8

Figure 6-1. Dialing an Alternative Router Using IP Unnumbered Interfaces ..............6-3

Figure 6-2. Dialing an Alternative Router Using Demand Circuit Groups ..................6-5

Figure 7-1. Multilink and Bandwidth-on-Demand Operation ......................................7-3

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Figure 7-2. BAP Negotiation between Two Routers ...................................................7-5

Figure 8-1. Demand Pools Window ............................................................................8-2

Figure 8-2. Edit Connector Window ............................................................................8-4

Figure 8-3. Edit Connector Window ............................................................................8-6

Figure 8-4. Sync Modem Interface Window ...............................................................8-7

Figure 8-5. Async Hayes Modem Interface Window ...................................................8-7

Figure 8-6. ISDN Dialup Window ..............................................................................8-12

Figure 8-7. BRI Interface Conﬁguration Window ......................................................8-13

Figure 8-8. PRI Logical Lines Window .....................................................................8-14

Figure 8-9. Timeslots Window ..................................................................................8-15

Figure 8-10. ISDN Logical Lines Window ...................................................................8-17

Figure 8-11. ISDN Conﬁgured Switches Window .......................................................8-18

Figure 8-12. Edit Connector Window ..........................................................................8-22

Figure 8-13. Circuit Deﬁnition Window .......................................................................8-23

Figure 8-14. ISDN Leased Line B Channels Window .................................................8-24

Figure 8-15. Add Circuit Window ................................................................................8-25

Figure 8-16. WAN Protocols Menu .............................................................................8-25

Figure 8-17. BRI Interface Conﬁguration Window for the BRI T4 Timer .....................8-26

Figure 8-18. ISDN Dialup Window ..............................................................................8-28

Figure 9-1. Demand Pools Window ............................................................................9-2

Figure 9-2. FR Demand Circuits Window ...................................................................9-3

Figure 9-3. Completed FR Demand Circuits Window .................................................9-4

Figure 9-4. FR Demand Interface List Window ..........................................................9-5

Figure 9-5. Frame Relay Demand Service List Window .............................................9-6

Figure 9-6. FR PVC List for Demand Services Window .............................................9-7

Figure 9-7. Frame Relay PVC Add Window ...............................................................9-8

Figure 9-8. Select Protocols Window .........................................................................9-9

Figure 9-9. Circuit Time of Day Schedule Window ...................................................9-13

Figure 9-10. Circuit Time of Day Schedule Window ...................................................9-14

Figure 9-11. Completed Circuit Time of Day Schedule Window .................................9-15

Figure 9-12. Demand Circuit Groups Window ............................................................9-16

Figure 9-13. Enter a Demand Pool Window ...............................................................9-17

Figure 9-14. Caller Resolution Info Window ...............................................................9-18

Figure 9-15. Completed Demand Circuit Groups Window .........................................9-19

Figure 9-16. Demand Circuit Group Window ..............................................................9-21

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Figure 10-1. Primary Circuit Deﬁnition Window ..........................................................10-2

Figure 10-2. Circuit Options Window ..........................................................................10-3

Figure 10-3. Completed Primary Circuit Deﬁnition Window .......................................10-4

Figure 10-4. FR Primary Interface Deﬁnition Window ................................................10-5

Figure 10-5. FR Interface Window ..............................................................................10-6

Figure 10-6. Completed FR Primary Interface Deﬁnition Window ..............................10-7

Figure 10-7. FR Backup Interface Window for Primary/Shared Interfaces .................10-8

Figure 10-8. Frame Relay Backup Service List Window ............................................10-9

Figure 10-9. Frame Relay Backup PVC List Window ...............................................10-10

Figure 10-10. Frame Relay PVC Add Window ...........................................................10-11

Figure 10-11. Priority/Outbound Filters Window ........................................................10-12

Figure 10-12. Circuit Time of Day Schedule Window .................................................10-15

Figure 10-13. Circuit Time of Day Schedule Window .................................................10-16

Figure 11-1. Bandwidth-On-Demand Circuit Deﬁnition Window .................................11-2

Figure 11-2. Bandwidth On Demand Monitor Options Window ..................................11-5

Figure 11-3. Bandwidth-On-Demand Pools Window ..................................................11-7

Figure 11-4. Preferred/Reserved Slots for BOD Pool Window ...................................11-8

Figure 11-5. Circuit List Window ...............................................................................11-10

Figure 11-6. Circuit Deﬁnition Window .....................................................................11-11

Figure 11-7. Edit BAP Circuit Interface Window .......................................................11-12

Figure 11-8. Circuit Options Window ........................................................................11-13

Figure 12-1. Primary Circuit Deﬁnition Window with Phone Out Button .....................12-3

Figure 12-2. Outgoing Phone List Window .................................................................12-4

Figure 12-3. Phone Number Window .........................................................................12-5

Figure 12-4. Completed Outgoing Phone List Window ..............................................12-6

Figure 12-5. Incoming Phone List Window .................................................................12-9

Figure 12-6. Phone Number Window .......................................................................12-10

Figure 12-7. Completed Incoming Phone List Window for ISDN ..............................12-11

Figure 12-8. ISDN Local Phone Lines Window ........................................................12-12

Figure 12-9. ISDN Local Phone Numbers Window ..................................................12-13

Figure 12-10. Phone Number Window .......................................................................12-13

Figure 13-1. Caller Resolution Table Window .............................................................13-2

Figure 13-2. Caller Name and Secret/Password Window ..........................................13-3

Figure 13-3. Local Circuit List Window .......................................................................13-4

Figure 13-4. Completed Caller Resolution Table Window ..........................................13-5

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Figure B-1. Dial-on-Demand Conﬁguration with PPP ................................................ B-2

Figure B-2. Dial-on-Demand for an ISDN Network .................................................... B-6

Figure B-3. Dial Backup Conﬁguration with PPP ..................................................... B-12

Figure B-4. Dial Backup over an ISDN Network ...................................................... B-18

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Page 21

Tables

Table 1-1. Dial Service Names .................................................................................1-2

Table 1-2. Setting Up a Default Modem or ISDN Conﬁguration ................................1-4

Table 2-1. Dial Service Names .................................................................................2-2

Table 2-2. Primary and Backup Lines .....................................................................2-13

Table 2-3. Primary and Backup Circuit Protocols ...................................................2-13

Table 5-1. Time of Day Schedules for Standby Circuit 1 ..........................................5-6

Table 6-1. Conﬁguration Requirements for Routers A and C ...................................6-4

Table 7-1. Terminology for Bandwidth-on-Demand Service .....................................7-1

Table 8-1. Modem Interface Windows .......................................................................8-6

Table 9-1. Customizing Demand Circuits ................................................................9-10

Table 10-1. Dial Backup Conﬁgurations ....................................................................10-1

Table 10-2. Customizing Backup Circuits ...............................................................10-14

Table 11-1. Terminology for Bandwidth-on-Demand Service ...................................11-1

Table 11-2. Customizing Bandwidth-on-Demand Service ........................................11-3

Table 11-3. Changing the Monitor Parameters .........................................................11-6

Table 12-1. Customizing the Outgoing Phone List ....................................................12-8

Table A-1. Organization of Parameters .................................................................... A-1

Table A-2. Abbreviated Site Manager Window Titles ............................................... A-3

Table A-3. Switch Types by Country ....................................................................... A-17

Table B-1. Demand Pools Parameter ....................................................................... B-3

Table B-2. Line Media Type Parameters ................................................................... B-3

Table B-3. IP Parameters ......................................................................................... B-4

Table B-4. IP Adjacent Host Parameter ................................................................... B-4

Table B-5. PPP Demand Circuits Parameters .......................................................... B-4

Table B-6. Outgoing Phone List Parameter .............................................................. B-5

Table B-7. Caller Resolution Table Parameters ........................................................ B-5

Table B-8. Port Application Mode Parameter ........................................................... B-7

Table B-9. MCT1 Clock Parameter (Router 1 only) .................................................. B-7

Table B-10. Demand Pools Parameter ....................................................................... B-8

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Table B-11. ISDN Switch Conﬁguration Parameter .................................................... B-8

Table B-12. PPP Demand Circuits Parameters .......................................................... B-9

Table B-13. Outgoing Phone List Parameter .............................................................. B-9

Table B-14. IP Parameters ....................................................................................... B-10

Table B-15. IP Adjacent Host Parameter ................................................................. B-10

Table B-16. Caller Resolution Table Parameters ...................................................... B-11

Table B-17. Local Phone Number Parameters ......................................................... B-11

Table B-18. Backup Pools Parameter ....................................................................... B-13

Table B-19. Circuit Options Parameters ................................................................... B-14

Table B-20. Primary Circuit Deﬁnition Parameters ................................................... B-15

Table B-21. Outgoing Phone List Parameter ............................................................ B-15

Table B-22. Caller Resolution Table Parameters (Router 2 only) ............................. B-16

Table B-23. IP Parameter ......................................................................................... B-17

Table B-24. IP Adjacent Host Parameters ................................................................ B-17

Table B-25. Port Application Parameter ................................................................... B-19

Table B-26. Backup Pools Parameter ....................................................................... B-20

Table B-27. ISDN Switch Conﬁguration Parameter .................................................. B-20

Table B-28. Circuit Options Parameters ................................................................... B-21

Table B-29. Primary Circuit Deﬁnition Parameters ................................................... B-21

Table B-30. Outgoing Phone List Parameter ............................................................ B-22

Table B-31. Caller Resolution Table Parameters (Router 2 only) ............................. B-22

Table B-32. Local Phone Numbers Parameters ....................................................... B-23

Table C-1. Line Pool Parameters ..............................................................................C-1

Table C-2. Line Media Type Parameters ...................................................................C-1

Table C-3. Modem Interface Parameters ..................................................................C-2

Table C-4. Port Application Mode Parameters .........................................................C-2

Table C-5. Logical Lines Parameter .........................................................................C-3

Table C-6. ISDN Switch Parameters ........................................................................C-3

Table C-7. ISDN Logical Lines Parameters .............................................................. C-3

Table C-8. Local Phone Number Parameters ...........................................................C-4

Table C-9. BRI Interface Parameters ........................................................................C-4

Table C-10. Demand Circuit Parameters ....................................................................C-5

Table C-11. Demand Circuit Group Parameters .........................................................C-6

Table C-12. Primary/Backup Circuit Parameters ........................................................C-7

Table C-13. Bandwidth-on-Demand Circuit Parameters .............................................C-8

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Table C-14. Outgoing Phone List Parameters ............................................................ C-9

Table C-15. Incoming Phone List Parameters ............................................................ C-9

Table C-16. Caller Resolution Table Parameters ...................................................... C-10

Table D-1. BRI Parameters for the AT&T 5ESS Switch ............................................D-1

Table D-2. BRI Parameters for the Northern Telecom DMS-100 Switch ..................D-2

Table E-1. Summary of AT Modem Initialization Commands ................................... E-1

114062 Rev. B

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Page 25

About This Guide

If you are responsible for conﬁguring dial services, you need to read this guide.

If you want to Go to

Start a dial service on a router, using a default conﬁguration Chapter 1 Learn about all three dial services Chapter 2 Learn about Integrated Services Digital Network (ISDN)

communication Learn about special aspects of the Bay Networks implementation of

each dial service

Change default settings for dial service parameters Chapter 8

Obtain information about Site Manager parameters (this is the same information you obtain using Site Manager online Help)

Review some conﬁguration examples Appendix B Quickly learn parameter defaults Appendix C Obtain information for ordering ISDN lines in the United States Appendix D Use an AT command string for modem conﬁgurations Appendix E

Chapter 3

Chapter 4 through Chapter 7

through Chapter 13

Appendix A

114062 Rev. B

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Configuring Dial Services

Before Y ou Begin

Before using this guide, complete the following procedures. For a new router:

• Install the router (refer to the installation manual that came with your router).

• Connect the router to the network and create a pilot conﬁguration ﬁle (refer to

Quick-Starting Routers, Connecting AN and ANH Systems to a Network Connecting ASN Routers to a Network

Make sure that you are running the latest version of Bay Networks Site Manager and router software. For instructions, refer to

7–10.xx to Version 11.0

Conventions

, or

Upgrading Routers from Version

bold text

Indicates text that you need to enter, command names, and buttons in menu paths. Example: Enter

Example: Use the Example: ATM DXI > Interfaces >

wfsm &

dinfo

command.

PVCs

identiﬁes the PVCs button in the window that appears when you select the Interfaces option from the ATM DXI menu.

italic text

Indicates variable values in command syntax descriptions, new terms, ﬁle and directory names, and book titles.

quotation marks (“ ”) Indicate the title of a chapter or section within a book.

screen text

Indicates data that appears on the screen. Example:

Set Bay Networks Trap Monitor Filters

xxvi

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About This Guide

separator ( > ) Separates menu and option names in instructions and

internal pin-to-pin wire connections. Example: Protocols > AppleTalk identiﬁes the AppleTalk option in the Protocols menu.

Example: Pin 7 > 19 > 20

vertical line (|) Indicates that you enter only one of the parts of the

command. The vertical line separates choices. Do not type the vertical line when entering the command. Example: If the command syntax is

Acronyms

show at routes show at routes

AURP AppleTalk Update Routing Protocol BACP Bandwidth Allocation Control Protocol BAP Bandwidth Allocation Protocol BofL Breath of Life BRI Basic Rate Interface CHAP Challenge Handshake Authentication Protocol CSU channel service unit DLCI Data Link Connection Identiﬁer DLCMI Data Link Control Management Interface DSL Digital Subscriber Loop DSU data service unit ET exchange termination HDLC High-level Data Link Control IP Internet Protocol IPX Internet Packet Exchange ISDN Integrated Services Digital Network ITU-T International Telecommunication

Union–T elecommunications

LAN local area network LAPD Link Access Procedure-D

nets

, you enter either

show at nets

, but not both.

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Configuring Dial Services

LCP Link Control Protocol LQR Link Quality Report LT line terminator NT network terminator P AP Password Authentication Protocol PH packet handling PPP Point-to-Point Protocol PRI Primary Rate Interface PSPDN Packet Switched Public Data Network PSTN Public Switched Telephone Network PVC permanent virtual circuit RADIUS Remote Access Dial-In User Services RIP Routing Information Protocol SAP Service Advertising Protocol SAPI service access point identiﬁer SPID Service Proﬁle Identiﬁer SVC switched virtual circuit TA terminal adapter TE terminal equipment TEI terminal endpoint identiﬁer UNI user network interface WAN wide area network XNS Xerox Network System

Ordering Bay Networks Publications

To purchase additional copies of this document or other Bay Networks publications, order by part number from Bay Networks Press™ at the following numbers:

• Phone -- U.S./Canada: 1-888-422-9773

• Phone -- International: 1-510-490-4752

• FAX -- U.S./Canada and International: 1-510-498-2609

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Bay Networks Customer Service

You can purchase a support contract from your Bay Networks distributor or authorized reseller, or directly from Bay Networks Services. For information about, or to purchase a Bay Networks service contract, either call your local Bay Networks ﬁeld sales ofﬁce or one of the following numbers:

Region Telephone number Fax number

About This Guide

United States and Canada

Europe 33-4-92-96-69-66 33-4-92-96-69-96 Asia/Paciﬁc 61-2-9927-8888 61-2-9927-8899 Latin America 561-988-7661 561-988-7550

How to Get Help

If you purchased a service contract for your Bay Networks product from a distributor or authorized reseller, contact the technical support staff for that distributor or reseller for assistance.

If you purchased a Bay Networks service program, call one of the following Bay Networks Technical Support Centers:

Technical Support Center Telephone number Fax number

Billerica, MA 1-800-2LANWAN 508-670-8765 Santa Clara, CA 1-800-2LANWAN 408-495-1188 Valbonne, France 33-4-92-96-69-68 33-4-92-96-69-98 Sydney, Australia 61-2-9927-8800 61-2-9927-8811 Tokyo, Japan 81-3-5402-0180 81-3-5402-0173

1-800-2LANWAN; then enter Express Routing Code (ERC) 290, when prompted, to purchase or renew a service contract

1-508-436-8880 (direct)

1-508-670-8766

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For More Information

For information about Bay Networks and its products, visit the Bay Networks World Wide Web (WWW) site at http://www.baynetworks.com. To learn more about Bay Networks Customer Service, select Customer Service on the opening Web page.

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Chapter 1

Getting Started

dial service

such as people in branch ofﬁces, telecommuters, and sales people in the ﬁeld. To make these remote connections, dial services use dial-up lines (also called

switched lines

or when a failed or congested leased line needs a secondary dial-up connection. Dial-up lines can be a cost-effective alternative to leased lines and packet networks, which are permanent connections that are available regardless of network trafﬁc.

provides access to a central switched network for remote users,

), which are activated when there is data to send across the network

This manual describes three dial services: dial-on-demand, dial backup, and bandwidth-on-demand. In this chapter, you will perform a basic dial service conﬁguration--that is, a conﬁguration using all available defaults. Setting up a basic conﬁguration will familiarize you with the conﬁguration tasks. Subsequent chapters explain how to customize the conﬁguration to suit your needs.

How to Use This Manual

Understanding how this manual is organized should make it more useful to you. The manual is organized as follows:

• Getting Started, which explains how to set up a basic conﬁguration using all of the defaults.

Begin by reading this chapter. This gives you a general idea of the conﬁguration tasks you will perform; however, it does not describe many features that you may want to implement for your network.

• Overviews and features of each dial service. This information is included in Chapters 2 through 7.

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Configuring Dial Services

• Instructions for modifying the default conﬁguration in Chapter

These instructions are in Chapters 8 through 13. Most of the instructions assume that you have read Chapter

1 and explain how to modify the

conﬁguration. In the procedures, any step that instructs you to set a parameter value is

followed by a box that includes the Site Manager parameter and the location of the parameter description in Appendix A. To read more about the parameter before specifying a value, refer to the speciﬁed page.

• Appendixes that include parameter descriptions, conﬁguration examples, parameter default tables, ISDN ordering information, and a list of AT modem initialization commands.

The names of the dial services are sometimes abbreviated in this manual.

able 1-1 lists the full and abbreviated names of each dial service.

Table 1-1. Dial Service Names

Full Name Abbreviated Name

Dial-on-demand Demand Dial backup Backup Bandwidth-on-demand Bandwidth

Before Y ou Begin

Before you conﬁgure a dial service, you should have done the following:

• Installed the router.

• Installed either ISDN or modem lines.

• Ordered Integrated Services Digital Network (ISDN) service (if applicable) and received the information for setting up ISDN conﬁgurations (for example, switch type and phone numbers). Refer to Appendix D for information on ordering ISDN lines in the United States.

• Ordered and conﬁgured external modems (if applicable).

• Decided whether to use the Challenge Handshake Authentication Protocol (CHAP) or the Password Authentication Protocol (PAP) for Point-to-Point Protocol (PPP) connections.

1-2

114062 Rev. B

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In addition, you should have read Conﬁguring Routers and done the following:

• Selected a COM, MCT1, or MCE1 port and conﬁgured a leased interface only (dial backup or bandwidth-on-demand service only). When you conﬁgure dial-up circuits, you designate these leased interfaces as dial backup primaries or bandwidth circuits. You do not need to do this for dial-on-demand service, even if you conﬁgure demand circuits to use bandwidth-on-demand service.

• Opened a conﬁguration ﬁle.

• Selected the router hardware modules, if this is a local mode conﬁguration. Chapter 2 of this manual lists the types of leased lines that you can select.

Refer to Conﬁguring Routers for instructions on setting up leased interfaces.

Setting Up a Dial Service

Each dial service has many conﬁgurable parameters, but for a basic conﬁguration, you change only a subset of these parameters.

Setting up a dial service involves three main tasks:

Getting Started

114062 Rev. B

1. Enabling a physical interface

2. Creating line pools

3. Assigning and conﬁguring circuits that use the conﬁgured line pools

Each task involves several steps.

able 1-2 on page 1-4 lists the basic tasks required to set up a dial service. These

tasks apply to modem and ISDN conﬁgurations. This basic conﬁguration assumes the following:

• Your router interfaces are synchronous.

• PPP is the layer 2 protocol.

• IP is the layer 3 protocol.

• There is no ISDN caller ID service; therefore, no incoming phone list is required.

This basic conﬁguration does not address every application.

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Configuring Dial Services

Table 1-2. Setting Up a Default Modem or ISDN Conﬁguration

Task Parameters to Set DOD* DB BOD

1. Create a line pool and assign an ID to the pool

ISDN interfaces only: Bef ore creating a line pool, select an ISDN port and conﬁgure it for BRI or PRI service.

2. Add one or more lines to the pool and, for modem lines, conﬁgure the interface. For ISDN lines, the interface is deﬁned before adding the line to the pool.

3. Designate the ISDN switch type (ISDN only)

4. Specify a local phone number (ISDN only)

5. Add a demand, backup, or bandwidth circuit Pool ID x x x

6. Specify the leased-line connection type Circuit Type x x

7. Specify authentication protocol information (CHAP is the default protocol.)

8. Specify the circuit connection mode Demand Connection Mode x

9. Add protocols (This chapter uses IP as an example.)

10.Create an outgoing phone list Phone Number

11.Set up the caller resolution table Caller Name

*. Abbreviations: DOD=dial-on-demand, DB=dial backup, BOD=bandwidth-on-demand

Pool ID Port Application Mode

None (accept the default) x x x

Switch T ype x x x

Directory Number Service Provider ID (SPID) for United States and Canada only

Backup Pool ID x Bandwidth-on-Demand Pool ID x CHAP Local Name x x x CHAP Secret x x x

Backup Mode x Bandwidth Mode x IP Address

IP Adjacent Host

Phone Ext/SubAddr

CHAP Secret

xxx

If you need to refer to a parameter description, click on Help in the Site Manager window or refer to Appendix A of this manual.

1-4 114062 Rev. B

Page 35

Conﬁguring Line Pools

A line pool is a group of one or more lines that reside on the router slots. You identify each pool by assigning a pool ID. The lines are the physical connections over which the circuits transmit and receive data. Each line can connect to a modem or directly to an ISDN network (using a router with integral ISDN). A line pool can have a combination of synchronous and asynchronous interface types.

The steps for creating line pools are the same for all three dial services. The steps for adding modem lines (Raise DTR, V.25bis, and Hayes) and ISDN lines to a pool are different. Refer to the appropriate section for instructions:

Getting Started

•“Creating Line Pools

•“Creating Line Pools with ISDN

with Modem Lines”

Creating Line Pools with Modem Lines

To conﬁgure line pools with Raise DTR, V.25bis, and Hayes interfaces:

1. From the Conﬁguration Manager window , select Dialup > Demand Pools,

Backup Pools, or Bandwidth On Demand Pools (Figur

Lines” on page 1-11

e 1-1).

Figure 1-1. Dialup Menu from the Conﬁguration Manager Window

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Configuring Dial Services

Site Manager displays the Pools window (Figure 1-2).

Note: To avoid repetition, this section shows only the demand conﬁguration

windows. The backup and bandwidth windows are similar, but may have different titles.

Figure 1-2. Demand Pools Window

Click on Add.

Site Manager displays the Pool Conﬁguration window (Figure

Figure 1-3. Demand Pool Conﬁguration Window

Enter a Pool ID and click on OK.

Site Manager: Demand/Backup/Bandwidth Pool ID parameter: page A-4

1-6 114062 Rev. B

1-3).

Page 37

Getting Started

Note: You can use the same ID for a demand, backup, or bandwidth pool, but

you cannot use the same ID for two of the same type of pool.

Site Manager displays the Lines Deﬁnition window (Figure 1-4).

Figure 1-4. Demand Lines Deﬁnition Window for a Backbone Link Node

Click on an available COM connector to assign a line to the pool, but

consider the following:

• Do not select any COM lines that you previously conﬁgured as leased lines.

• The lines that you select for a demand pool must reside on the same slot.

• The lines that you select for a backup and bandwidth pool can reside across slots.

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Configuring Dial Services

Site Manager displays the Choose WAN Serial Interface Type window

(Figure

Figure 1-5. Choose WAN Serial Interface Type Window

1-5).

Note: On the BLN

and Backbone Concentrator Node (BCN®), the Choose WAN Serial Interface Type window appears only for ports on an Octal Sync Link Module. For all other modules, the Sync Line Media Type window

(Figure

Site Manager: WAN Serial Interface Type parameter: page A-4

1-6) appears.

Accept the default, Sync, or click on Values and select Async.

If you plan to use Asynchronous PPP for your dial connections, you may w ant to select Async for the WAN serial interface type. After selecting an interface type, Site Manager displays the Sync Line Media Type window (Figure or the Async Line Media Type window (Figure

1-7).

1-6)

1-8 114062 Rev. B

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Getting Started

Figure 1-6. Sync Line Media Type Window

Figure 1-7. Async Line Media Type Window

114062 Rev. B 1-9

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Configuring Dial Services

6. Click on OK to accept the line media default, Raise DTR.

At this point, you may want to select V.25bis or Hayes as the line media type rather than accept the default.

For Hayes signaling, you need to specify a modem initialization string for modem dialing (refer to Chapter 8 to modify modem parameters). For both options, you need to conﬁgure an outgoing phone list (refer to “Creating an

Outgoing Phone List” on page 1-36).

Site Manager: Line Media Type parameter: page A-5

You return to the Lines Deﬁnition window. The letter D (demand), B (backup), or W (bandwidth) appears next to the COM port to indicate what type of line it is. Note that the router can use the same line for all three types of pools. Asynchronous ports have an at sign (@) next to the connector name.

7. Select and conﬁgure more lines for the pool, if necessary.

8. Select File > Exit to exit the Lines Deﬁnition window (refer to Figure 1-4).

You return to the Pools window with three new buttons (Edit, Apply, and Delete) that allow you to edit the new pool.

9. Now that you have set up a pool, do one of the following:

• Go to “Conﬁ

guring Circuits” on page 1-19 to conﬁgure dial-up circuits.

• Go to the next section to add ISDN lines to the pool.

1-10 114062 Rev. B

Page 41

Creating Line Pools with ISDN Lines

Before creating a pool with ISDN lines, you need to select a port and designate it as a BRI or PRI interface. Refer to the appropriate section for instructions:

Getting Started

•“Conﬁ

guring BRI Lines” guring PRI Lines” on page 1-12

Conﬁguring BRI Lines

ISDN/BRI Net Modules are available only on the Access Node (AN®), Access Stack Node (ASN™), Access Node Hub (ANH™), and Access Remote Node (ARN™) hardware platforms. To conﬁgure BRI lines:

1. Begin at the Conﬁguration Manager window (refer to Figure 1-1).

2. Click on an ISDN connector.

Site Manager displays the Port Application window (Figure

1-8).

Figure 1-8. Port Application Window

Accept the default, Dialup 2B+D, and click on OK.

You return to the Conﬁguration Manager window.

Site Manager: Port Application Mode parameter: page A-15

4. Repeat Steps 1 through 3 for each BRI line you want in the pool.

5. Go to “Adding ISDN Lines to a Pool” on page 1-16.

114062 Rev. B 1-11

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Configuring Dial Services

Conﬁguring PRI Lines

PRI lines are available only on the ASN, BCN, and BLN hardware platforms using the following link modules:

• Single or Dual Port Multichannel T1 Link Module (BLN and BCN)

• Dual Port Multichannel T1 Net Module (ASN)

• 120-ohm Single Port MCE1-II Net Module (BLN and BCN)

• 120-ohm Single or Dual Port MCE1-II Link Module (ASN)

• QMCT1 Link Module (BLN and BCN) To conﬁgure PRI lines:

1. Begin at the Conﬁguration Manager window (refer to Figure 1-1).

2. Click on an MCT1 or MCE1 connector.

Site Manager displays the Port Application window, which is similar to the window shown in Figure

3. Select PRI for the Port Application Mode and click on OK.

1-8.

Site Manager: Port Application Mode parameter: page A-16

Site Manager displays the Clock Parameters window (Figure

1-9).

Figure 1-9. Clock Parameters Window

1-12 114062 Rev. B

Page 43

Getting Started

The clock parameters deﬁne the timing sources that apply to all connectors and DS0 timeslots supported by the MCT1 and MCE1 Link Modules.

4. Click on OK to accept the default values for the clock parameters.

Site Manager displays the MCT1 Port Parameters window (Figure

1-10). The

MCE1 Port Parameters window has different parameters. The port parameters apply to each of the 24 DS0 channels for MCT1 ports or

31 DS0 channels for MCE1 ports.

Figure 1-10. MCT1 Port Parameters Window

Click on OK to accept the default values for the port parameters.

Note: In most cases, you can use the defaults for MCT1 and MCE1

parameters. If you want to modify these values, refer to Conﬁguring WAN Line Services.

Site Manager displays the PRI Logical Lines window (Figure

114062 Rev. B 1-13

1-11).

Page 44

Configuring Dial Services

Figure 1-11. PRI Logical Lines Window

For the ﬁrst PRI interface you conﬁgure, the Timeslots window (Figure 1-12) appears immediately after the PRI Logical Lines window.

Figure

1-12 shows the MCT1 Timeslots window. The MCE1 Timeslots

window is similar, but has 31 timeslots.

1-14 114062 Rev. B

Page 45

Getting Started

Figure 1-12. MCT1 Timeslots Window

Each PRI port supports up to 23 logical B channels for MCT1 ports or 30 logical B channels for MCE1 ports.

6. Click on Select All to change all timeslots to B channels.

If you purchased selective PRI service from your ISDN provider, you can select individual timeslots. Select only the timeslots that the service provider assigns to you. For example, if your provider assigns you timeslots 1 through 10, select slots 1 through 10 in the Timeslots window.

When you select a timeslot, a menu appears with two options (Figure 1-13).

Figure 1-13. Menu for PRI Timeslot

114062 Rev. B 1-15

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Configuring Dial Services

Select B Channel from the menu. The conﬁgured timeslot should read

B channel. Repeat the procedure for each timeslot you want to conﬁgure.

7. Click on OK.

You return to the PRI Logical Lines window.

8. Accept the default MTU size.

9. Click on Done.

Adding ISDN Lines to a Pool

To add ISDN BRI or PRI lines to a pool:

1. Begin at the Conﬁguration Manager window (refer to Figure 1-1).

2. Select Dialup > Demand Pools, Backup Pools, or Bandwidth On Demand

Pools.

Site Manager displays a Pools window similar to Figure

3. Click on Add.

1-2 on page 1-6.

Site Manager displays the Pool Conﬁguration window (refer to Figure

1-6).

page

4. Enter a pool ID and click on OK.

Site Manager: Demand/Backup/Bandwidth Pool ID parameter: page A-4

Site Manager displays the Lines Deﬁnition window (refer to Figure

5. Click on a previously conﬁgured ISDN, MCT1, or MCE1 port.

Site Manager displays the ISDN Switch Conﬁguration window (Figure

1-3 on

1-4).

1-14).

1-16 114062 Rev. B

Page 47

Getting Started

Figure 1-14. ISDN Switch Conﬁguration Window

Accept the default switch or select another switch for your network.

Site Manager: Switch Type parameter: page A-16

7. Accept the defaults for the other parameters and click on Done.

Site Manager bypasses the ISDN Switch Conﬁguration window for subsequent ISDN lines. Subsequent chapters explain how to modify the switch type.

After you select a switch, Site Manager displays the ISDN Logical Lines window (Figure 1-15), where you deﬁne the number of B channels in the pool and prioritize each channel.

114062 Rev. B 1-17

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Configuring Dial Services

Figure 1-15. ISDN Logical Lines Window

Figure 1-15 shows the ISDN Logical Lines window for BRI. For PRI, the

window is similar, but the parameter defaults are different.

8. Accept the defaults by clicking on OK.

You return to the Lines Deﬁnition window (refer to Figure

1-4). T o modify the

other switch parameters, refer to Chapter 8.

9. Select File > Exit to exit the Lines Deﬁnition window.

You return to the Pools window, which shows the conﬁgured pools. The window has three new buttons: Edit, Apply, and Delete.

10. Repeat Steps 1 through 9 to add more lines to the pool.

For backup and bandwidth services, you can select lines across slots.

11. Go to the next section, “Conﬁguring Circuits,” to conﬁgure dial-up

circuits.

1-18 114062 Rev. B

Page 49

Conﬁguring Circuits

To conﬁgure dial-up circuits, refer to the appropriate section for instructions:

Getting Started

•“Creating

Demand Circuits” Backup Circuits,” on page 1-25

•“Creating Bandwidth Circuits,” on page 1-28 When you create a PPP dial-up circuit, Site Manager creates a special PPP record

for the circuit, which identifies who is calling the router. This record is listed in the PPP Interface Lists window as follows:

Interface for Dialup Lines

For more information about PPP, refer to Conﬁguring PPP Services.

Creating Demand Circuits

To conﬁgure Frame Relay demand circuits, skip this section and go to Chapter 9. To conﬁgure PPP demand circuits:

1. Begin at the Conﬁguration Manager window (refer to Figure 1-1).

2. Select Dialup > Demand Circuits.

Site Manager displays the Demand Pools window, listing the new pools

(Figure

1-16).

Figure 1-16. Demand Pools Window Listing Conﬁgured Pools

114062 Rev. B 1-19

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Configuring Dial Services

3. Highlight the pool that you want the circuit to use and click on

PPP Circuits.

Site Manager displays the PPP Demand Circuits window (Figure

1-17).

Figure 1-17. PPP Demand Circuits Window

Click on Add to add a demand circuit.

You return to the PPP Demand Circuits window, which shows the new circuit and the defaults for each parameter (Figure

1-18). Site Manager also adds the

following buttons: Apply, Schedule, Phone Out, BW on Demand, and Delete.

1-20 114062 Rev. B

Page 51

Getting Started

Figure 1-18. Completed PPP Demand Circuits Window

Repeat Step 4 for each demand circuit you want to add.

6. Keep the PPP Demand Circuits window open and go to the next section,

“Specif

114062 Rev. B 1-21

ying the Authentication Protocol Information.”

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Configuring Dial Services

Specifying the Authentication Protocol Information

For network security, the router must identify itself in the call setup message that it sends to the remote router. The authentication protocols, CHAP and PAP, enable the identiﬁcation process. CHAP is the default protocol.

All lines in a pool must use the same authentication protocol. To specify the CHAP information that the router uses when it calls a remote site:

1. Scroll down the PPP Demand Circuits window to the CHAP parameters.

2. Enter values for the CHAP Local Name and CHAP Secret parameters.

Each CHAP Local Name must be unique, but the CHAP Secret must be the same for both sides of the connection.

Site Manager: CHAP Local Name parameter: page A-37 Site Manager: CHAP Secret parameter: page A-38

3. Go to the next section, “Specifying the Connection Mode.”

Specifying the Connection Mode

The connection mode determines which router places a call ﬁrst, which prevents two routers from establishing a demand circuit with each other at the same time.

To conﬁgure the connection mode:

1. Scroll down the PPP Demand Circuits window to the Connection Mode

parameter.

2. Select a value for the Connection Mode parameter. Collision Master is

the default.

If this router is set to Collision Master, we recommend that you set the router at the other side of the connection to Collision Slave.

Site Manager: Connection Mode parameter: page A-28

3. Go to the next section, “Enabling a Protocol.”

1-22 114062 Rev. B

Page 53

Enabling a Protocol

In this section, you enable the Internet Protocol (IP). Refer to Conﬁguring IP Services for Site Manager windows and parameter descriptions.

To enable one or more protocols for a selected demand circuit:

1. From the top left corner of the PPP Demand Circuits window (refer to

Figure 1-17), select Protocols > Add/Delete.

Getting Started

Site Manager displays the Select Protocols window (Figure

Figure 1-19. Select Protocols Window

1-19).

Click on IP for this demand circuit and click on OK.

Site Manager displays the IP Conﬁguration window.

3. Enter an IP address and click on OK.

Site Manager: IP Address parameter; see

Conﬁguring IP Services

Site Manager displays the IP Adjacent Host Conﬁguration window.

114062 Rev. B 1-23

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Configuring Dial Services

4. Enter an IP adjacent host address and click on OK.

Site Manager: IP Adjacent Host parameter; see

Conﬁguring IP Services

Site Manager displays the IP Adjacent Host Route window.

5. Click on OK to accept the defaults.

You return to the PPP Demand Circuits window (refer to Figure

Note: You cannot conﬁgure protocol prioritization for demand circuits

1-18).

running PPP multilink. Protocol prioritization modiﬁes the order in which packets are sent across the line. This could change the multilink-assigned order of packets and cause problems with the data.

6. Do one of the following:

-- If you have ISDN lines in the pool, go to “C

reating an Outgoing Phone

List” on page 1-36.

-- If you have only Raise DTR lines in the pool, click on Done in the PPP Demand Circuits window and go to “Setting

Up the Caller Resolution

Table” on page 1-40.

1-24 114062 Rev. B

Page 55

Creating Backup Circuits

To create a PPP backup circuit, you designate a single leased circuit, leased PPP multiline circuit, or leased multilink circuit as a primary circuit. If the primary circuit fails, the router activates a backup circuit to continue transmitting data.

To conﬁgure Frame Relay backup circuits, skip this section and go to Chapter 10. To conﬁgure PPP backup circuits:

1. Begin at the Conﬁguration Manager window (refer to Figure 1-1).

2. Select Dialup > Backup Circuits > PPP.

Getting Started

Site Manager displays the Primary Circuit Deﬁnition window (Figure which lists the leased circuits that you have conﬁgured.

Figure 1-20. Primary Circuit Deﬁnition Window

1-20),

Highlight a circuit name and click on Cct (Circuit) Type.

Site Manager displays the Circuit Options window (Figure

114062 Rev. B 1-25

1-21).

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Configuring Dial Services

Figure 1-21. Circuit Options Window

Select Primary for the Circuit Type parameter.

Site Manager: Circuit Type parameter: page A-55

5. Enter the ID of the backup pool that you want this circuit to use.

Site Manager: Backup Pool ID parameter: page A-55

6. Click on OK.

You return to the Primary Circuit Deﬁnition window, which shows the new circuit and the defaults for each parameter . Site Manager also adds the buttons Apply, Schedule, and Phone Out.

7. Click on OK.

8. Repeat Steps 2 through 6 to conﬁgure more primary circuits.

9. Keep the Primary Circuit Deﬁnition window open and go to the next

section, “Specifying the Backup Mode

1-26 114062 Rev. B

.”

Page 57

Specifying the Backup Mode

The backup mode determines which router initiates a backup connection. To specify the backup mode:

1. Scroll down the Primary Circuit Deﬁnition window to the Backup Mode

parameter.

2. Select a value for the Backup Mode parameter. Master is the default.

If this router is set to Master, the peer must be set to Slave.

Site Manager: Backup Mode parameter: page A-56

3. Go to the next section, “Specifying the Authentication Protocol

Information.”

Specifying the Authentication Protocol Information

For network security, the master router must identify itself when it calls the remote router. The authentication protocols, CHAP and PAP, enable the identiﬁcation process. CHAP is the default protocol. All lines in a pool must use the same authentication protocol.

Getting Started

To specify the CHAP information for the local router, do the following:

1. Scroll down the Primary Circuit Deﬁnition window to the CHAP

parameters.

2. Enter values for the CHAP Local Name and CHAP Secret parameters.

The CHAP Local Name must be unique, but the CHAP Secret must be the same on both sides of the connection.

Site Manager: CHAP Local Name parameter: page A-37 Site Manager: CHAP Secret parameter: page A-38

3. Do one of the following:

-- If you have ISDN lines in the pool, go to “C

reating an Outgoing Phone

List” on page 1-36.

-- If you have only Raise DTR lines in the pool, click on Done and go to “Setting

114062 Rev. B 1-27

Up the Caller Resolution Table” on page 1-40.

Page 58

Configuring Dial Services

Creating Bandwidth Circuits

There are two ways to enable bandwidth-on-demand service: designate a single leased circuit or a leased multilink circuit as a bandwidth-on-demand circuit, or assign a bandwidth pool to a demand circuit. If these circuits become congested, the router provides up to 29 dial-up circuits to relieve the congestion, for a total of 30 dial-up lines for communication.

For conﬁguration instructions, refer to the next section for leased circuits or to “Adding Bandwidth

Conﬁguring Leased Circuits as Bandwidth Circuits

You should have already conﬁgured PPP multilink for the leased circuits that you will designate as bandwidth circuits.

To conﬁgure leased circuits as bandwidth circuits:

1. Begin at the Conﬁguration Manager window (refer to Figure 1-1).

2. Select Dialup > Bandwidth On Demand Circuits.

Service for Demand Lines” on page 1-33.

Site Manager displays the Bandwidth-On-Demand Circuit Deﬁnition window

(Figure

1-28 114062 Rev. B

1-22), which lists the leased circuits that you previously conﬁgured.

Page 59

Getting Started

Figure 1-22. Bandwidth-on-Demand Circuit Deﬁnition Window

Highlight a circuit and click on Cct Type.

Site Manager displays the Circuit Options window (Figure

Figure 1-23. Circuit Options Window

114062 Rev. B 1-29

1-23).

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Configuring Dial Services

4. Select Bandwidth on Demand for the Circuit Type parameter.

Site Manager: Circuit Type parameter: page A-75

5. Enter the ID of the bandwidth pool you want this circuit to use.

Site Manager: Bandwidth-on-Demand Pool ID parameter: page A-78

6. Keep this window open and go to the next section, “Specifying the

Bandwidth Mode.”

Specifying the Bandwidth Mode

The bandwidth mode determines whether the router serves as the congestion monitor. The level of congestion instructs the router when to provide additional circuits to carry data across the network.

To conﬁgure the bandwidth mode:

1. Scroll down the Circuit Options window to see the Bandwidth Mode

parameter.

2. Select a bandwidth mode. Non-Monitor is the default.

If this router is set to Non-Monitor, the peer must be set to Monitor.

Site Manager: Bandwidth Mode parameter: page A-76

Note the following for the Bandwidth Mode parameter:

• If you accepted the default, Non-Monitor: Site Manager displays the Caller Resolution Info window, which you use

to enter the name of the remote router that this circuit supports. This enables the local, non-monitor router receiving the call to identify the remote router placing the call.

Enter values for the Caller Name and CHAP Secret parameters, then click on OK.

Site Manager: Caller Name parameter: page A-103 Site Manager: CHAP Secret parameter: page A-103

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Getting Started

• If you selected Monitor: Site Manager does not prompt you for caller resolution information.

Howev er , if this is the ﬁrst monitor circuit associated with a pool that uses multiple slots, Site Manager displays the Preferred/Reserved Slots for BOD Pool window (Figure

Figure 1-24. Preferred/Reserved Slots for BOD Pool Window

1-24).

Enter a number for the Preferred Bandwidth Slot and Reserved Bandwidth Slot parameters and click on OK.

Site Manager: Preferred Bandwidth Slot parameter: page A-80 Site Manager: Reserved Bandwidth Slot parameter: page A-81

You return to the Circuit Options window (refer to Figure

3. Click on OK to exit the Circuit Options window.

1-23).

You return to the Bandwidth-on-Demand Circuit Deﬁnition window (refer to

Figure 1-22).

4. Keep the Bandwidth-on-Demand Circuit Deﬁnition window open and go

to the next section, “Specifying t

114062 Rev. B 1-31

he Authentication Protocol.”

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Configuring Dial Services

Specifying the Authentication Protocol

All lines in a pool must use the same authentication protocol. To specify the CHAP information for the local router:

1. Scroll down the Bandwidth-on-Demand Cir cuit Deﬁnition windo w to the

CHAP parameters.

2. Enter values for the CHAP Local Name and CHAP Secret parameters.

The CHAP Local Name must be unique, but the CHAP Secret must be the same on both sides of the connection.

Site Manager: CHAP Local Name parameter: page A-37 Site Manager: CHAP Secret parameter: page A-38

3. Do one of the following:

-- If you have ISDN lines in the pool, go to “C

reating an Outgoing Phone

List” on page 1-36.

-- If you have only Raise D TR lines in the pool, click on Done in the Bandwidth-on-Demand Circuit Deﬁnition window and go to “Setting

the Caller Resolution Table” on page 1-40.

1-32 114062 Rev. B

Page 63

Adding Bandwidth Service for Demand Lines

If the demand line becomes congested, the router can provide 29 additional dial-up lines to reduce congestion. To do this, you enable bandwidth service for the demand line by associating it with a conﬁgured bandwidth pool.

To add bandwidth service for a demand circuit:

1. Select Dialup > Demand Circuits > PPP Circuits.

Getting Started

Site Manager displays the PPP Demand Circuits window (Figure

1-25).

Figure 1-25. PPP Demand Circuits Window

Click on BW on Demand.

Site Manager displays the Enter a BOD Pool window (Figure

114062 Rev. B 1-33

1-26).

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Configuring Dial Services

Figure 1-26. Enter a BOD Pool Window

Enter the ID number of a conﬁgured bandwidth pool.

4. Click on OK.

Site Manager displays the BOD Conﬁguration window (Figure

1-27). The

parameters in this window determine whether the router acts as the monitor router, which means that it monitors congestion on the line, and whether the router activates additional lines to relieve congestion.

1-34 114062 Rev. B

Page 65

Getting Started

Figure 1-27. BOD Conﬁguration Window

Click on OK to accept the defaults.

You return to the PPP Demand Circuits window.

6. Click on Remove BOD only if you want to remove bandwidth service for

the demand circuit; otherwise, go to the next step.

7. Do one of the following:

-- If you have ISDN lines in the pool, go to “C

reating an Outgoing Phone

List” on page 1-36.

-- If you have only Raise DTR lines in the pool, click on Done and go to

“Setting

114062 Rev. B 1-35

Up the Caller Resolution Table” on page 1-40.

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Configuring Dial Services

Creating an Outgoing Phone List

For ISDN, V.25bis, and Hayes connections, the router uses the outgoing phone list to place a call to a remote router. In this chapter, we assume that your modem connections are Raise DTR, which means that the phone numbers are programmed directly into the modem. Therefore, you only need to set up an outgoing phone list if you have conﬁgured ISDN connections.

Outgoing phone lists are associated with a speciﬁc circuit, not with the physical line. The lines in the pool may be used by many circuits, which is why the telephone numbers are part of each circuit’s conﬁguration and not the line’s conﬁguration.

To create an outgoing phone list:

1. Begin at the PPP Demand Circuits, Primary Circuit Deﬁnition, or

Bandwidth-on-Demand Circuit Deﬁnition window.

2. Select a circuit and click on Phone Out.

Site Manager displays the Outgoing Phone List window (Figure

Figure 1-28. Outgoing Phone List Window

1-28).

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Page 67

Getting Started

Click on Add to display the Phone Number window (Figure 1-29).

Figure 1-29. Phone Number Window

Enter a phone number for the Phone Number parameter, and an

extension, if any, for the Phone Ext/Subaddr parameter.

Site Manager: Phone Number parameter: page A-96 Site Manager: Phone Ext/SubAddr parameter: page A-97

5. Click on OK.

You return to the Outgoing Phone List window with the phone number parameters and the phone list ﬁlled in.

6. Accept the defaults for Phone Number Type, ISDN Numbering Type, and

ISDN Numbering Plan, unless your service provider instructs otherwise.

Site Manager: Phone Number Type parameter: page A-89 Site Manager: ISDN Numbering Type parameter: page A-89 Site Manager: ISDN Numbering Plan parameter: page A-90

7. Click on Done when you ﬁnish entering phone numbers.

8. For ISDN conﬁgurations, go to the next section; otherwise, go to

“Setting

114062 Rev. B 1-37

Up the Caller Resolution Table” on page 1-40.

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Configuring Dial Services

Creating the Local Phone List (ISDN only)

A local phone number identifies the local router when it places a call to a remote router. The router includes its own phone number in the ISDN outgoing call setup message. This number, along with Service Provider IDs (SPIDs) in the United States and Canada, also identiﬁes the router to the ISDN switch so that the switch can activate the circuit. Your ISDN service provider assigns this number.

You must conﬁgure local phone numbers if you use the Bandwidth Allocation Protocol (BAP) with bandwidth service across ISDN connections. The router designated as the non-monitor uses the local phone number to identify additional lines to the peer.

To create a local phone list:

1. Begin at the Conﬁguration Manager window (refer to Figure 1-1).

2. Select Dialup > Local Phone Numbers.

Site Manager displays the ISDN Local Phone Lines window (Figure

Figure 1-30. ISDN Local Phone Lines Window

Click on Local Phones.

Site Manager displays the ISDN Local Phone Numbers window

(Figure

1-31).

1-30).

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Getting Started

Figure 1-31. ISDN Local Phone Numbers Window

The SPID parameter appears only for switches used in the United States and Canada.

4. Click on Add.

Site Manager displays the Phone Number window (Figure

Figure 1-32. Phone Number Window

114062 Rev. B 1-39

1-32).

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Configuring Dial Services

5. Enter a local phone number and a subaddress, if any.

Site Manager: Directory Number parameter: page A-85 Site Manager: Ext/SubAddr parameter: page A-85

6. Click on OK to accept the defaults for the other parameters.

You return to the ISDN Local Phone Numbers window, which shows the new phone entry.

7. Repeat the procedure for each phone number you want to add.

8. Click on Done until you return to the Conﬁguration Manager window.

9. Go to the next section, “Setting Up the Caller Resolution Table.”

Setting Up the Caller Resolution Table

For network security, all three dial services use a PPP identiﬁcation mechanism to determine who is calling the router. PPP performs this identiﬁcation process using one of two authentication protocols, CHAP or PAP. CHAP is the default protocol.

To identify an incoming remote caller, you enter the name and CHAP secret of each remote caller in a caller resolution table, and associate each name with a local demand, primary, or bandwidth circuit. When a router receives an incoming call, it checks the caller resolution table for an entry that identiﬁes the caller. If the caller is authorized, the local router activates a circuit.

To conﬁgure the caller resolution table:

1. Begin at the Conﬁguration Manager window (refer to Figure 1-1).

2. Select Dialup > Caller Resolution Table.

Site Manager displays the Caller Resolution Table window (Figure

1-40 114062 Rev. B

1-33).

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Getting Started

Figure 1-33. Caller Resolution Table Window

3. Click on Add to add an entry to the table.

Site Manager displays the Caller Name and Secret/Password window

(Figure

Figure 1-34. Caller Name and Secret/Password Window

114062 Rev. B 1-41

1-34).

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Configuring Dial Services

4. Enter the name and CHAP secret of the remote router.

The CHAP secret must be the same for routers on both sides of the circuit.

Site Manager: Caller Name parameter: page A-103 Site Manager: CHAP Secret parameter: page A-103

The Caller Name parameter identiﬁes a remote router. Do not confuse this parameter with the CHAP Local Name parameter, which identiﬁes the local router, that is, the router you are currently conﬁguring.

5. Click on OK.

Site Manager displays the Local Circuit List window (Figure

1-35), which

lists the demand, primary, or bandwidth circuits that you have conﬁgured.

Figure 1-35. Local Circuit List Window

Highlight the local circuit that the router should activate when it r ecei ves

a call from the remote router (speciﬁed in the Caller Name parameter).

Site Manager: Local Circuit parameter: page A-104

7. Click on OK.

You return to the caller resolution table window. When you select a caller name in the window, the parameters display the caller’s information.

8. Click on Done when you ﬁnish adding table entries.

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Page 73

What to Do Next

Now that you have completed the steps in this chapter, your dial service should be operating. To further modify your conﬁguration, refer to the appropriate chapter for instructions:

• Chapter 2 provides an overview of each service.

• Chapter 3 provides an overview of ISDN.

• Chapter 4 describes Bay Networks implementation common to all dial services.

• Chapters 5 through 7 describe Bay Networks implementation of dial-on-demand, dial backup, and bandwidth-on-demand, respectively. These chapters provide information to help you make appropriate customizing choices.

• Chapters 8 through 13 provide instructions for customizing your conﬁguration.

• Appendix A contains parameter descriptions for all dial services.

Getting Started

• Appendix B provides some basic conﬁguration examples.

• Appendix C lists parameter defaults for all dial services.

• Appendix D explains how to order ISDN lines in the United States.

• Appendix E lists the AT initialization commands for the ARN.

114062 Rev. B 1-43

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Page 75

Chapter 2

Dial Services Overview

A dial service provides access to a central switched network for remote users, such as people in branch ofﬁces, telecommuters, and sales people in the ﬁeld. To make these remote connections, dial services use dial-up lines (also called switched lines), which are activated only when needed.

If you send a limited amount of data or your data transmission is intermittent, dial-up lines can be less expensive than leased lines, and they improve network performance and ﬂexibility.

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Configuring Dial Services

The names of the dial services are sometimes abbreviated in this manual.

able 2-1 lists the full and abbreviated names of each dial service.

Table 2-1. Dial Service Names

Full Name Abbreviated Name

Dial-on-demand Demand Dial backup Backup Bandwidth-on-demand Bandwidth

All three dial services work over Public, Switched Telephone Networks (PSTNs) such as a standard telephone network, a switched 56 Kb/s network, and an Integrated Services Digital Network (ISDN) (Figure

2-1).

PSTN

Modem

Router

*You only need a terminal adapter if your router does not have built-in ISDN capability. If your router has an ISDN/BRI module or an MCT1 or MCE1 link module installed, along with ISDN software, you can connect to an ISDN network directly.

DSU/CSU

Terminal*

adapter

Dial-up line

Switched 56 Kb/s network

ISDN

DS0005A

Figure 2-1. Example of Dial Access to a Switched Telephone Network

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Network Access Methods and Services

The router initiates, monitors, and terminates dial-up connections using a modem or ISDN terminal adapter that supports Raise DTR, V.25bis, or Hayes signaling, or a router with a built-in ISDN interface connected directly to an ISDN network. If the router has internal ISDN capability, you do not need external dial devices.

Note: For BRI service, you need a network terminator 1 (NT1) to connect to

an ISDN network. With the exception of the ARN, the router’s ISDN/BRI Module does not include an internal NT1, so you or your service provider must supply it.

All three dial services enable the router to access a switched network as follows:

• Integrated ISDN capability -- Provides a BRI or PRI for digital connectivity from the router to the destination device, replacing standard analog phone lines. Using signals on an ISDN line, the router instructs the network to set up a call to a particular destination. ISDN capability eliminates the need for dial devices such as modems, because you no longer need to convert digital signals to analog. An ISDN network also allows you to send data, voice, and video over the same digital line.

Dial Services Overview

• Raise DTR -- A signaling method that enables access to the network by preprogramming the destination phone numbers into the dial device (modem or ISDN terminal adapter). Raise DTR signaling works with the following interfaces: X.21, V.35, RS-232, and RS-422.

• V.25bis -- A signaling method that enables access to the network by passing the destination phone numbers from the router to the dial device (modem or ISDN terminal adapter). This method lets the dial device support connections to multiple destinations. V.25bis signaling works with the following interfaces: X.21, V.35, RS-232, and RS-422.

• Hayes -- A signaling method that enables network access by passing the destination phone numbers from the router to the dial device (modem or ISDN terminal adapter). Using Hayes signaling, the router sends an AT initialization command to interact with the dial device. The ARN internal V.34 modem uses Hayes signaling. Hayes signaling works with RS-232 interfaces.

The method you choose depends on your application, network resources, and the type of network to which you are connecting. ISDN, a complex networking technology, is further explained in Chapter 3.

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Configuring Dial Services

Dial-on-Demand Service

Dial-on-demand service enables you to establish a network connection only when the router has data to send across the network, or when you dynamically conﬁgure the router to establish a connection. By using dial-up lines, you signiﬁcantly reduce the high costs associated with leased lines, which connect remote locations even if there is no data to transmit or receive.

T o implement dial-on-demand, the router establishes a demand circuit (that is, the logical connection) over a physical line. The router establishes a demand circuit when

• The router has data to send across the circuit.

• You specify a time of day to activate the circuit.

• You enable the Force Dial parameter, which instructs the router to force a connection.

The router terminates the circuit when

• The conﬁgured inactivity time expires because the router is not sending or receiving data.

• You schedule a time of day to take the circuit down.

• You enable the Force Take Down parameter, which instructs the router to force the termination of a connection.

Refer to “Acti Dial-on-demand is supported on asynchronous (RS-449), synchronous (RS-449,

V.35, RS-422, and X.21), and ISDN interfaces. Figure connecting two routers. When the router has data to transmit or when you conﬁgure the router to bring up a demand circuit, the router instructs the dial device to establish a connection.

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vating Demand Circuits” on page 2-9 for more information.

2-2 shows a demand line

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Dial Services Overview

Data arrives at the New York router, but the final destination is Dallas. A port in the demand pool transmits the data.

Los Angeles

Dial device

Chicago

Dial device

Dallas

Dial device

DS0013A

Demand pool 1: Slot 2

New York

Back of router

Dial device

Figure 2-2. Dial-on-Demand Service

Demand Lines and Pools

Demand lines provide the physical connections over which the demand circuits transmit and receive data. To maximize the number of circuits that can be active simultaneously, you establish a demand pool.

A demand pool is a group of one or more lines that reside in the same slot on the router. You identify each demand pool by assigning a demand pool ID. Lines in a demand 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 internal 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.

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Configuring Dial Services

How Demand Lines, Pools, and Circuits Work Together

When you create demand circuits, you assign a demand pool ID to each circuit. Note that many demand circuits can use the same demand pool and, therefore, can use the same lines in that pool. The line itself does not have a speciﬁc network address; it is the circuit that has the associated network address.

When the router has data to send across a demand circuit, the circuit searches for an available demand line from its associated demand pool. When it ﬁnds an available line, the router establishes a dial-up connection to the remote router. The router terminates the connection when there is no more data to send or receive, when you manually take down the connection, or the scheduled time for an active connection expires.

Figure

2-3 shows the relationship between demand lines, pools, and circuits using

PPP as the data link layer protocol.

Demand pool 1:

New York

Configuration of the New York router

Circuit 1 – 192.32.14.1 (the local interface to Los Angeles)

Circuit 2 – 192.32.15.1 (the local interface to Chicago)

Circuit 3 – 192.32.16.1 (the local interface to Dallas)

Line 1

Dial device

Line 2

192.32.14.0

192.32.15.0

192.32.16.0

Circuit 1 – 192.32.14.2

Dial device

Los Angeles

Circuit 2 – 192.32.15.2

Dial device

Chicago

Circuit 3 – 192.32.16.2

Dial device

Dallas

DS0014A

Figure 2-3. Example of Demand Lines, Pools, and Circuits

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In Figure 2-3, three circuits share two physical lines that make up Demand pool 1. Note that only two of the circuits using Demand pool 1 can be active simultaneously because only two modems are available. The IP addresses are associated with each circuit, not with the physical line.

In addition to assigning a demand pool ID to each circuit, you can assign protocol interfaces and conﬁgure phone lists for use with V.25bis, Hayes, and ISDN signaling. Refer to Chapter 12 for more information.

Demand Circuit Protocols

The protocol for a demand circuit can be either PPP or Frame Relay. A Frame Relay demand circuit may have any number of service records and PVCs. Typically, Frame Relay connections are used with ISDN lines. PPP and Frame Relay circuits can use the same demand pool.

Dial Services Overview

Figure

2-3 shows an example of a PPP demand circuit over modem lines. Figure

2-4 shows a Frame Relay demand circuit over ISDN lines.

Frame Relay network

Router A

Router B

Router C

MODEM

BRI

PRI

Raise DTR/V.25bis

Frame Relay switch

T1/HSSI/SYNC

Frame Relay switch

Key

Leased line

Dial-up line

Figure 2-4. Dial-on-Demand Connection over a Frame Relay Network

Router D

DS0033A

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Configuring Dial Services

In Figure 2-4, remote Routers A, B, and C are connecting to the central Router D through a Frame Relay network, dialing into the network across ISDN lines. Router D connects to the network across a leased line.

The permanent virtual circuits (PVCs) in this network can be either fully meshed or non-fully meshed, allowing Routers A, B, C, and D to connect to one another. With the dial connection between the routers and the Frame Relay network, each router can dial into the network and communicate with one another, pro vided that the PVCs are set up properly and the physical and logical connections are active.

Conﬁguring Frame Relay to Work Optimally with Dial-on-Demand

How Frame Relay demand circuits operate depends on how your Frame Relay service provider deﬁnes the user network interface (UNI), the point between the router and the service provider . The service pro vider deﬁnes the UNI dynamically or statically.

If the UNI is dynamic, it changes for each call. This means that the PVCs may be different for each call, but they direct data to the same destination. The router initially learns the PVCs when it calls the Frame Relay switch. If the UNI is static, the user has deﬁned the PVCs and can conﬁgure them for the router. The UNI remains the same for all calls.

For a Frame Relay demand conﬁguration to work well, follow these guidelines:

• You must have a PVC conﬁgured before you place a call. For data to activate a demand circuit (instead of using Force Dial), the router

must learn at least one PVC from the Frame Relay switch before it can place a call. However, to learn the PVCs, the router must call the switch, which it cannot do.

For a dynamic UNI, you need to statically conﬁgure at least one PVC on the router that is not conﬁgured for the switch. The static PVC acts as a “fake” PVC that the router uses only to place an initial call to the switch. To conﬁgure a static PVC, you set the Frame Relay Data Link Connection Identiﬁer (DLCI) to a number other than the number the switch provider assigns, assuming you know the range of possible DLCIs. The static PVC is still valid if you happen to use a number that the switch provider uses. Refer to Conﬁguring Frame Relay Services for information about conﬁguring PVCs.

For a static UNI, the user conﬁgures the PVCs. A “fake” PVC is unnecessary.

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• For a dynamic UNI, use the default Frame Relay service record. This service record holds all PVCs that the router learns dynamically.

• Choose a network layer protocol that can retransmit data between the PVC and the network if the data is lost.

Although the router makes a dial connection and starts sending data, the PVCs do not always activate immediately. Consequently, you might lose data during the ﬁrst part of the transmission. Therefore, it is important to use protocols that can account for this situation and ensure that any lost data can be sent again. We strongly recommend using Internet Protocol (IP) or Internet Protocol Exchange (IPX).

• If the remote routers in your network are using IP , ensure that they also use the Address Resolution Protocol (ARP) and not Inverse ARP. This enables the local router to learn address information.

Activating Demand Circuits

The router activates a demand circuit when

Dial Services Overview

• The router has data to send across the circuit. When the router has data to transmit, it automatically selects one of the

demand lines from the circuit’s associated demand pool. As long as data is going across the line, the end-to-end connection remains active.

• You enable the Force Dial parameter. To activate a line immediately, you conﬁgure the Force Dial parameter to

force the router to initiate a connection, regardless of whether there is data activity. To conﬁgure this parameter, refer to Chapter 9.

• You specify a time of day to activate the circuit. Using the Schedule option, you can schedule the circuit’s availability for a

speciﬁc day and time. The schedule parameters are part of the circuit’s conﬁguration (refer to Chapter 9). The Schedule option also allows you to specify whether the router uses the Inactivity Time parameter to dynamically deactivate the connection.

The router does not accept incoming calls or activate Frame Relay demand circuits if there is an incoming call from the Frame Relay network. The router answers an incoming call only over a PPP circuit.

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Configuring Dial Services

The Frame Relay switch does not activate PVCs and conﬁgured DLCIs until the router receives data from the demand circuit and exchanges Data Link Control Management Interface (DLCMI) status messages with the switch. For more information about Frame Relay, refer to Conﬁguring Frame Relay Services.

Terminating Demand Circuits

The router deactivates the demand circuit when

• You enable the Force Take Down parameter. To deactivate a force dial connection, you conﬁgure the Force Take Down

parameter, which instructs the router to clear the connection. To learn how to conﬁgure this parameter, refer to Chapter 9.

• You schedule the circuit to come down. Using the Schedule option, you can schedule the circuit’s availability for a

speciﬁc day and time. The schedule parameters are part of the circuit’s conﬁguration (refer to Chapter 9). The Schedule option also allows you to conﬁgure whether the router uses the Inactivity Time parameter to dynamically deactivate the connection.

• The inactivity time expires. To deactivate the connection, you can conﬁgure the Inactivity Time

parameter, which dynamically terminates the connection after a speciﬁed amount of time elapses without data activity. If there is data going across the line, the inactivity time resets and the connection remains active.

T o ensure that a connection is not up longer than necessary, you can conﬁgure trafﬁc ﬁlters that allow speciﬁc types of data to go across a line without resetting the inactivity time.

For PPP connections, the router does not consider Link Quality Report (LQR), Link Control Protocol (LCP), and periodic CHAP messages as data, so these messages do not reset the inactivity timer.

For Frame Relay circuits, DLCMI messages and other signaling packets are not treated as data, so they do not reset the inactivity timer. The router usually terminates Frame Relay demand connections, not the Frame Relay network.

• The Frame Relay DLCMI fails. If the DLCMI messages cannot be exchanged across the Frame Relay demand

circuit, the router deactivates the circuit.

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Dial Services Overview

Bandwidth-on-Demand Service for Congested Demand Lines

To relieve congestion across a demand line, you can use up to 29 additional lines from an existing bandwidth-on-demand pool, providing a total of 30 lines for communication. This feature is only for demand conﬁgurations that use PPP as the data link-layer protocol. Adding bandwidth to a congested demand line beneﬁts time-critical applications that require data to reach its destination efﬁciently.

To enable bandwidth-on-demand service, you associate the demand circuit with a bandwidth-on-demand pool, then you conﬁgure parameters that monitor congestion across the line.

Once you enable bandwidth-on-demand service, the router determines that the demand line is congested when the trafﬁc over the line exceeds a certain user-conﬁgured threshold. The router that is conﬁgured as the congestion monitor then searches for an available line from the bandwidth pool that you associate with this demand circuit.

Lines in a bandwidth-on-demand pool can reside across slots, so you need to designate each slot as either preferred or reserved. This determines the order in which the router searches the slots for available lines; the preferred slot is ﬁrst and the reserved slot is second. If these slots have no available lines, the router automatically uses the local slot. The local slot is the slot containing the ﬁrst demand line that was activated. When the router activates additional lines, they adopt the conﬁguration of the congested demand circuit.

PPP multilink is the protocol that enables the router to use multiple lines simultaneously to transmit data. Multilink enables the router to use lines at different speeds and to ev enly distribute data across those lines. When you enable multilink, you can conﬁgure a set of links between two peers into a single bundle. The actual number of lines in a multilink bundle depends on hardware platform constraints, total bundle speed, the speed of each link in the bundle, and the type of trafﬁc you are sending.

For PPP demand connections across ISDN lines, you can manage the allocation of bandwidth for a multilink bundle by enabling the PPP Bandwidth Allocation Protocol (BAP). This protocol is available only after bandwidth service is set up. For more information about BAP, refer to Chapter 7.

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Configuring Dial Services

Figure 2-5 illustrates how additional switched lines provide more bandwidth for a

congested demand line.

New York City

ISDN

Key

Initial demand line

Additional lines from a bandwidth pool

Figure 2-5. Additional Lines for a Dial-on-Demand Connection

Boston

DS0004A

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Dial Backup Service

Dial backup service lets you conﬁgure backup lines for failed primary lines. A primary line is a leased line, a leased multiline (Standard and PPP only), or a leased multilink connection. This leased line acts as the physical connection over which the leased circuit (the logical connection) carries trafﬁc. You designate these leased circuits as primary circuits, which instructs the router to provide backup service if the primary line and circuit fail.

If a primary circuit fails and you conﬁgure dial backup service for that circuit, the router activates an a vailable backup line. When the primary circuit is restored, the router reroutes all trafﬁc from the backup circuit to the primary circuit and clears the dial backup connection.

Dial backup is supported on asynchronous lines (RS-449), synchronous lines (RS-449, V.35, RS-422, and X.21), and ISDN interfaces.

able 2-2 lists the primary and backup lines you can conﬁgure.

Table 2-2. Primary and Backup Lines

Dial Services Overview

Line Type

Primary Any leased line up to T1/E1 rates, including multiline (Standard and

PPP only) and multilink connections. Frame Relay multiline circuits cannot be dial backup primaries.

Frame Relay PVCs

Backup Any WAN line including ISDN B channels. Lines must be in the dial

backup pool.

Table 2-3 lists the protocols for each type of primary and backup circuit.

Table 2-3. Primary and Backup Circuit Protocols

If the primary circuit’s protocol is The backup circuit’s protocol can be

Standard Async or Sync PPP only PPP Async or Sync PPP only Frame Relay -- backing up only one PVC Async or Sync PPP only Frame Relay -- backing up the entire Frame

Relay interface

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Frame Relay only

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Configuring Dial Services

Circuit Backup versus Link Backup

When you select PPP or Frame Relay for the backup circuit, you determine whether the router performs circuit backup or link backup.

Circuit backup is a point-to-point backup connection. One circuit is backed up at a time, instead of an entire interface. When you back up a point-to-point primary circuit (Standard, PPP, or a single Frame Relay PVC), the protocol for the backup circuit is PPP.

Figures 2-

6 and 2-7 show examples of circuit backup. Figure 2-6 shows a

Standard primary circuit aided by a PPP backup circuit. Figure primary circuit aided by a PPP backup circuit.

Note: F or circuit backup of a single Frame Relay PVC, the backup line passes

through the switched network only, bypassing the Frame Relay network.

If either primary line fails, the modem at Central site A can connect to router B or C via a backup circuit.

Central site A

Router

Key

Primary line Backup line

Modem

Remote site C

Router

PSTN

Modem

2-7 shows a PPP

Remote site B

Router

DS0020A

Figure 2-6. PPP Backup over a PSTN

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Dial Services Overview

Router Router

Primary leased line

Dial backup line

ISDN

DS0021A

Figure 2-7. PPP Backup over an ISDN Network

Link backup is a multiple-circuit backup, which means that the entire interface is backed up. To back up all PVCs for a Frame Relay interface, you conﬁgure Frame Relay across the backup circuit.

Figure

2-8 shows an example of link backup.

Failure point

Remote site router (R1)

Frame Relay

interface

BRI

Frame Relay

network

PRI

ISDN

network

Central site router (R2)

Group mode PVCs

Key

Primary PVCs Backup PVCs

DS0026A

Figure 2-8. Link Backup for a Frame Relay Network

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Configuring Dial Services

In Figure 2-8, 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 DLCMI status requests, router R1 terminates the backup connection.

Note: A primary circuit cannot use link and circuit backup simultaneously.

Knowing When the Primary Line Fails

Depending on the protocol for the primary and backup circuit, the router determines that the primary circuit failed in one of the following ways:

• No Breath of Life (BofL) messages in the BofL

(Standard and PPP) For Standard and PPP, Site Manager automatically enables BofL messages on

each primary line and disables them on each backup line. BofL messages verify that the line is operational. The router determines that the primary line has failed when it stops receiving packets within the BofL time period.

You conﬁgure the BofL timer using 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, which 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 to connect to the primary line’s modem or CSU/DSU. Refer to the Cable Guide for Routers and BayStream Platforms.

time period

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• 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. W ithout 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).

Dial Services Overview

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How Backup Lines, Pools, and Circuits Work Together

For each leased circuit that needs a backup circuit, you designate that circuit as a primary circuit and assign it a backup pool ID. If the primary circuit fails, the router activates the backup line to carry the backup circuit. If your network uses a multiline or multilink primary , the backup line is activ ated when the last line in the multiline or multilink bundle fails. You must ﬁrst conﬁgure a leased circuit and a backup pool before you can conﬁgure primary and backup circuits.

Figure

2-9 shows how backup lines, pools, and circuits work together. The router

in San Diego has two leased lines, one going to a router in Phoenix and the other to a router in San Francisco. The circuits for each of these destinations are associated with Backup Pool 1. If either of these leased lines fails, the San Diego router activates Backup Line 1 from Backup Pool 1 to continue routing trafﬁc to the destination.

128.32.17.2

Backup pool 1:

Backup line 1

San Diego

Configuration of the San Diego router Circuit 1 - 128.32.17.1

(the local interface to Phoenix) Circuit 2 - 128.32.18.1

(the local interface to San Francisco)

128.32.17.0

ISDN

128.32.18.0

Phoenix

128.32.18.2

San Francisco

DS0029A

Figure 2-9. Example of Backup Pools, Lines, and Circuits

You can assign the same backup pool ID to more than one primary circuit. If you want only one backup line dedicated to a primary circuit, then you should conﬁgure only one line in a pool and assign that pool exclusively to that circuit.

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Conﬁguration of the Backup Circuit

The conﬁguration of the backup circuit depends on the protocol for that circuit. If Standard or PPP is running over the primary circuit, the backup circuit inherits the primary’s network layer address conﬁguration. Unlike the network layer address conﬁguration, the data link layer conﬁguration can be unique.

If Frame Relay is running over the primary circuit, the backup circuit can inherit the primary’s conﬁguration or it can use its own conﬁguration. When the Frame Relay primary and backup circuit use the same conﬁguration, it is called the shared conﬁguration. The shared conﬁguration allows a backup circuit to use the same network layer address as the primary circuit. The backup circuit’s data link layer conﬁguration (PVCs, DLCIs, and ﬁlters) can be the same or different from the primary circuit.

If the backup circuit uses a unique conﬁguration, it is called the secondary conﬁguration. A secondary conﬁguration uses a different network layer address, and data link layer conﬁguration (PVCs and ﬁlters) from the primary circuit.

Note: If the backup circuit connects to a different interface at the destination

than the primary circuit, you do not need to conﬁgure unique PVCs for the backup circuit. In this case, the switch informs the destination router of the available PVCs.

Dial Services Overview

Activating the Backup Line

When the router detects a failure on the primary line, it selects a line from a backup pool. The router activates a backup line when

• The primary circuit is not operating.

• All of the primary circuit’s lines have failed.

• An active backup line has failed.

If the backup line itself fails, an inactive backup line can replace it only if you conﬁgure multiple lines in the backup pool. If the ﬁrst line fails for every phone number in the router’s phone list, and the primary line is still do wn, the router tries the next line in the pool.

If you are backing up a Frame Relay primary circuit, the router (not the network) activates and terminates the Frame Relay backup connection. The router rejects incoming calls from the Frame Relay network.

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Reestablishing the Backup Connection

If the remote site has several telephone lines attached to individual dial units, the backup circuit uses the telephone numbers stored in the primary circuit’s record to connect to the site. If one telephone number fails, the backup line attempts to connect using one of the other telephone numbers.

For V.25bis calls, the router redials the same phone number until its retry attempts reach the maximum retry count that you specify in the modem parameters. If the router cannot make a connection using the current phone number, it tries the next number in its phone list. It continues trying until it has gone through all of the numbers or it connects successfully.

For ISDN calls, the router sends a call setup message for each number in the phone list. If the router cannot make a connection using the current phone number, it tries the next number in its phone list. It continues trying until it has gone through all of the numbers or it connects successfully.

Terminating the Backup Connection

The router terminates the backup circuit once it restores the primary circuit, the backup circuit fails, or the conﬁgured time period for the backup circuit has expired. Once the router restores the primary circuit, it veriﬁes that the backup circuit is no longer active. If the backup is still active, the router terminates it.

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Bandwidth-on-Demand Service

Bandwidth-on-demand service lets you conﬁgure additional dial-up lines for

• A congested leased line

• A congested multilink bundle, which is a set of links between two peer routers

• A congested dial-on-demand line

Note: Refer to “Bandwidth-on-Demand Service for Congested Demand

Lines” on page 2-11 for information about adding bandwidth for demand

lines.

When data trafﬁc exceeds the capacity of a line or bundle, bandwidth-on-demand service reduces congestion by adding up to 29 dial-up lines. The router can then provide a total of 30 lines for communication.

PPP multilink is the protocol that enables the router to use multiple dial-up lines simultaneously to transmit data. The actual number of lines in a multilink bundle depends on hardware platform constraints, total speed of the bundle, the speed of each link, and the type of trafﬁc you are sending.

Dial Services Overview

You can manage the allocation of bandwidth for a multilink bundle using the PPP BAP. This protocol is available only for ISDN lines; you conﬁgure it after you conﬁgure bandwidth-on-demand service. For more information about BAP, refer to Chapter 7.

Enabling Bandwidth-on-Demand Service

The leased line, demand line, or leased multilink bundle is the physical connection over which the leased or demand circuit (the logical connection) carries trafﬁc. The procedure for enabling bandwidth-on-demand service differs for leased circuits and demand circuits.

For a leased circuit, you designate the circuit as a bandwidth-on-demand circuit. This instructs the router to provide secondary dial-up lines if the leased circuit becomes congested.

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Configuring Dial Services

For a demand circuit, the PPP Demand Circuits window includes a BW on Demand button that lets you associate the demand circuit with an existing bandwidth-on-demand pool. It also lets you conﬁgure bandwidth-on-demand monitor parameters that determine when the demand circuit is congested.

Bandwidth-on-demand service is supported on asynchronous lines (RS-449), synchronous lines (RS-449, V.35, RS-422, and X.21), and ISDN interfaces.

You can use the following types of lines and protocols for bandwidth-on-demand service:

• Leased lines -- A single leased line, a multilink bundle, a switched

dial-on-demand line. Protocol supported: PPP multilink.

• Secondary dial-up lines -- Any WAN line.

Protocols supported: asynchronous or synchronous PPP multilink,

BAP for ISDN lines. The leased lines and secondary dial-up lines may operate at different speeds.

Figure

Figure 2-10. An Example of Bandwidth-on-Demand Service

2-10 shows how secondary lines support a leased connection.

ISDN

Key

Leased line with PPP multilink (64 Kb/s)

Secondary dial-up lines (ISDN B channels)

Remote Site BCentral Site A

DS0006A

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Initially, the router brings up one secondary line to alleviate congestion. If the congestion persists, the router activates a second and then a third line until the congestion subsides. Each new line the router activates becomes part of a multilink bundle. The router then balances trafﬁc over the bundle. Once the volume of trafﬁc decreases, the router deactivates the secondary lines, one at a time.

A router on one side of the connection monitors byte counts for the data it sends and receives. This router is called the monitor router. The monitor router uses these byte counts, along with bandwidth-on-demand monitor parameters, to determine when to activate additional lines for more bandwidth. The router then uses all the available lines in the bundle to send data across the network.

The router on the other side of the connection is the non-monitor router. The non-monitor router cannot activate additional dial-up lines. If you conﬁgure BAP for ISDN connections, the non-monitor router has a more active role in determining how additional lines are activated for more bandwidth. Refer to Chapter 7 for more information about BAP.

Bandwidth-on-Demand Lines and Pools

Dial Services Overview

A bandwidth-on-demand pool is a collection of dial-up lines that a congested leased line, demand line, or multilink bundle can use. Each bandwidth-on-demand pool is identiﬁed by a bandwidth-on-demand pool ID.

In a bandwidth-on-demand pool, you can combine asynchronous, synchronous, or ISDN lines in a single pool. 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).

Lines in a bandwidth pool may operate at different speeds. PPP multilink, the protocol that the router uses for bandwidth-on-demand circuits, can manage lines of varying speed, distribute traf ﬁc across lines, and monitor trafﬁc. The router may also use BAP to manage bandwidth allocation.

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Configuring Dial Services

When a leased line or bundle becomes congested, the router searches for an available dial-up line from its associated bandwidth-on-demand pool. Lines in a bandwidth-on-demand pool can reside on any slot, but each secondary circuit can use only three slots.

To determine the order in which the router searches the slots, you designate each slot as preferr ed or r eserved. The router uses the preferred slot ﬁrst. If there are no available lines, the router uses the reserved slot. If there are still no a v ailable lines, the router automatically uses the local slot, which is the slot containing the ﬁrst leased line that was activated. Once the router ﬁnds a line, it dials the destination using a phone number from the user-conﬁgured outgoing phone list.

How Lines, Pools, and Circuits Work Together

You assign a pool ID for each leased circuit or demand circuit. If the line or bundle becomes congested, the router activates a dial-up line from the pool. The dial-up circuit that runs over this line inherits the conﬁguration and protocol characteristics of the leased circuit.

You can assign the same bandwidth pool ID to more than one circuit. If you want a pool of dial-up lines dedicated to a speciﬁc bandwidth circuit, assign the pool exclusively to that circuit. Remember to ﬁrst conﬁgure a leased or demand connection before conﬁguring bandwidth-on-demand service.

Activating Dial-up Lines to Relieve Congestion

If one dial-up line from the bandwidth pool does not relieve the congestion, the router adds up to 29 lines until the congestion is relieved. The router activates additional lines only for a congested line, not for a failed line.

PPP multilink detects a state of congestion based on byte counts and the user-deﬁned monitor parameters. (Byte counts are measured prior to data compression.) The monitor parameters let you deﬁne congestion thresholds for the leased or demand circuit. If data trafﬁc exceeds a threshold, the router tries to activate a dial-up line. At this point, if you conﬁgure BAP, it manages the addition and removal of lines from the multilink bundle, based on the monitor parameters. For more details about BAP, refer to Chapter 7.

Once the volume of trafﬁc on the congested line falls below the congestion threshold, the router again uses only the leased line, demand line, or bundle. Refer to Chapter 11 for details about the monitor parameters.

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Terminating Secondary Lines

The router terminates secondary lines when

• The leased line or multilink bundle fails.

• The leased circuit is no longer congested.

• The remote router terminates the connection.

• There is a physical problem with the dial-up line.

Sample Bandwidth-on-Demand Application

In Figure 2-11, the leased line is congested due to bridge/routing protocol trafﬁc. The BLN in Rome, designated as the monitor router, has determined the line is congested based on the monitor parameter values. Consequently, the router brings up an ISDN B channel as a secondary line.

ISDN

Rome Backbone link node

Slot 3 octal sync

Slot 2 dual sync dual ethernet

Secondary dial-up line (ISDN B channel)

Dial-up line to Interlaken

Leased line (9.6 Kb/s)

64 Kb/s leased line to Florence

Dial Services Overview

Avignon access node

DS0001A

Figure 2-11. Sample Bandwidth-on-Demand Network

The monitor router brings down the secondary line once the level of congestion falls below the conﬁgured percentages. In addition to supporting the leased line to Avignon, the B channel can also act as a backup line for the leased line from Rome to Florence and as a demand line from Rome to Interlaken.

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Using the Same Line for All Dial Services

You can use the same physical line for dial-on-demand, dial backup, and bandwidth-on-demand pools. For example, if the router is not using a line for a dial-on-demand connection, it can use the line for a dial backup connection. If there are several requests for the same line, the router uses the line for the service requested ﬁrst.

If several pools use the same line, a combination of the letters D (demand), B (backup), and W (bandwidth) appear next to the connector name in the Conﬁguration Manager window (for example, COM1DW). These letters appear only next to COM and ISDN connector names.

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Avaya Dial User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Figures

Tables

About This Guide

Before Y ou Begin

Conventions

bold text

wfsm &

dinfo

Acronyms

Ordering Bay Networks Publications

Bay Networks Customer Service

How to Get Help

For More Information

How to Use This Manual

Table 1-1. Dial Service Names

Before Y ou Begin

Setting Up a Dial Service

Figure 1-2. Demand Pools Window

Figure 1-5. Choose WAN Serial Interface Type Window

Figure 1-6. Sync Line Media Type Window

Figure 1-7. Async Line Media Type Window

Figure 1-8. Port Application Window

Figure 1-9. Clock Parameters Window

Figure 1-10. MCT1 Port Parameters Window

Figure 1-11. PRI Logical Lines Window

Figure 1-12. MCT1 Timeslots Window

Figure 1-13. Menu for PRI Timeslot

Figure 1-15. ISDN Logical Lines Window

Creating Demand Circuits

Figure 1-17. PPP Demand Circuits Window

Figure 1-18. Completed PPP Demand Circuits Window

Figure 1-19. Select Protocols Window

Creating Backup Circuits

Figure 1-21. Circuit Options Window

Creating Bandwidth Circuits

Figure 1-23. Circuit Options Window

Figure 1-24. Preferred/Reserved Slots for BOD Pool Window

Figure 1-25. PPP Demand Circuits Window

Figure 1-26. Enter a BOD Pool Window

Creating an Outgoing Phone List

Figure 1-28. Outgoing Phone List Window

Figure 1-29. Phone Number Window

Creating the Local Phone List (ISDN only)

Figure 1-30. ISDN Local Phone Lines Window

Figure 1-31. ISDN Local Phone Numbers Window

Figure 1-32. Phone Number Window

Setting Up the Caller Resolution Table

Figure 1-33. Caller Resolution Table Window

Figure 1-34. Caller Name and Secret/Password Window

Figure 1-35. Local Circuit List Window

What to Do Next

Table 2-1. Dial Service Names

Figure 2-1. Example of Dial Access to a Switched Telephone Network

Dial-on-Demand Service

Figure 2-2. Dial-on-Demand Service

Figure 2-3. Example of Demand Lines, Pools, and Circuits

Figure 2-4. Dial-on-Demand Connection over a Frame Relay Network

Figure 2-5. Additional Lines for a Dial-on-Demand Connection

Dial Backup Service

Table 2-2. Primary and Backup Lines

Table 2-3. Primary and Backup Circuit Protocols

Figure 2-6. PPP Backup over a PSTN

Figure 2-7. PPP Backup over an ISDN Network

Figure 2-8. Link Backup for a Frame Relay Network

Figure 2-9. Example of Backup Pools, Lines, and Circuits

Bandwidth-on-Demand Service

Figure 2-10. An Example of Bandwidth-on-Demand Service

Figure 2-11. Sample Bandwidth-on-Demand Network

Using the Same Line for All Dial Services