Juniper JUNOSE 11.2 Configuration manual

JunosE™ Software

for E Series™ Broadband

Services Routers

Broadband Access

Configuration Guide

Release

11.2.x

Published: 2010-07-20

Juniper Networks, Inc.

1194 North Mathilda Avenue

Sunnyvale, California 94089

USA

408-745-2000

www.juniper.net

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6,429,706, 6,459,579, 6,493,347, 6,538,518, 6,538,899, 6,552,918, 6,567,902, 6,578,186, and 6,590,785.

JunosE™ Software for E Series™ Broadband Services Routers Broadband Access Configuration Guide

Release 11.2.x

Writing: Mark Barnard, Diane Florio, Bruce Gillham, Sarah Lesway-Ball, Brian Wesley Simmons, Fran Singer, Poornima Goswami, Chander

Aima, Hema Priya J, Krupa Chandrashekar, Subash Babu Asokan, Sairam Venugopalan

Editing: Benjamin Mann

Illustration: Nathaniel Woodward

Cover Design: Edmonds Design

Revision History

July 2010—FRS JunosE 11.2.x

The information in this document is current as of the date listed in the revision history.

YEAR 2000 NOTICE

Juniper Networks hardware and software products are Year 2000 compliant. The Junos OS has no known time-related limitations through

the year 2038. However, the NTP application is known to have some difficulty in the year 2036.

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Abbreviated Table of Contents

About the Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxv

Part 1 Managing Remote Access

Chapter 1 Configuring Remote Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Chapter 2 Monitoring and Troubleshooting Remote Access . . . . . . . . . . . . . . . . . . . . . 109

Part 2 Managing RADIUS and TACACS+

Chapter 3 Configuring RADIUS Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Chapter 4 Configuring RADIUS Dynamic-Request Server . . . . . . . . . . . . . . . . . . . . . . . 231

Chapter 5 Configuring RADIUS Relay Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

Chapter 6 RADIUS Attribute Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

Chapter 7 Application Terminate Reasons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

Chapter 8 Monitoring RADIUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297

Chapter 9 Configuring TACACS+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

Chapter 10 Monitoring TACACS+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323

Part 3 Managing L2TP

Chapter 11 L2TP Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329

Chapter 12 Configuring an L2TP LAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

Chapter 13 Configuring an L2TP LNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367

Chapter 14 Configuring L2TP Dial-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401

Chapter 15 L2TP Disconnect Cause Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413

Chapter 16 Monitoring L2TP and L2TP Dial-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417

Part 4 Managing DHCP

Chapter 17 DHCP Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 449

Chapter 18 DHCP Local Server Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457

Chapter 19 Configuring DHCP Local Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465

Chapter 20 Configuring DHCP Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 483

Chapter 21 Configuring the DHCP External Server Application . . . . . . . . . . . . . . . . . . . . 511

Chapter 22 Monitoring and Troubleshooting DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525

Part 5 Managing the Subscriber Environment

Chapter 23 Configuring Subscriber Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 567

Chapter 24 Monitoring Subscriber Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 581

Chapter 25 Configuring Subscriber Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 585

Chapter 26 Monitoring Subscriber Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617

Part 6 Managing Subscriber Services

Chapter 27 Configuring Service Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 623

Chapter 28 Monitoring Service Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 687

Part 7 Index

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 715

JunosE 11.2.x Broadband Access Configuration Guide

Table of Contents

About the Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxv

E Series and JunosE Documentation and Release Notes . . . . . . . . . . . . . . . . . . xxxv

Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxv

E Series and JunosE Text and Syntax Conventions . . . . . . . . . . . . . . . . . . . . . . . xxxv

Obtaining Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxvii

Documentation Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxvii

Requesting Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxvii

Self-Help Online Tools and Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxviii

Opening a Case with JTAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxviii

Part 1 Managing Remote Access

Chapter 1 Configuring Remote Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Remote Access Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

B-RAS Data Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Configuring IP Addresses for Remote Clients . . . . . . . . . . . . . . . . . . . . . . . . . . 4

AAA Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Remote Access Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

B-RAS Protocol Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Remote Access References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Before You Configure B-RAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Remote Access Configuration Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Configuring a B-RAS License . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Mapping a User Domain Name to a Virtual Router . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Mapping User Requests Without a Valid Domain Name . . . . . . . . . . . . . . . . . 8

Mapping User Requests Without a Configured Domain Name . . . . . . . . . . . . . 9

Using DNIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Redirected Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

IP Hinting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Setting Up Domain Name and Realm Name Usage . . . . . . . . . . . . . . . . . . . . . . . . . 11

Using the Realm Name as the Domain Name . . . . . . . . . . . . . . . . . . . . . . . . . 12

Using Delimiters Other Than @ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Using Either the Domain or the Realm as the Domain Name . . . . . . . . . . . . . 12

Specifying the Domain Name or Realm Name Parse Direction . . . . . . . . . . . . 13

Stripping the Domain Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Domain Name and Realm Name Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Specifying a Single Name for Users from a Domain . . . . . . . . . . . . . . . . . . . . . . . . 16

Configuring RADIUS Authentication and Accounting Servers . . . . . . . . . . . . . . . . . 17

Server Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Server Request Processing Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Authentication and Accounting Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Supporting Exchange of Extensible Authentication Protocol Messages . . . . 20

Immediate Accounting Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Duplicate and Broadcast Accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Configuring AAA Duplicate Accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Configuring AAA Broadcast Accounting . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Overriding AAA Accounting NAS Information . . . . . . . . . . . . . . . . . . . . . . 22

UDP Checksums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Collecting Accounting Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Configuring RADIUS AAA Servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

SNMP Traps and System Log Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

SNMP Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

System Log Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Configuring SNMP Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Configuring Local Authentication Servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Creating the Local Authentication Environment . . . . . . . . . . . . . . . . . . . . . . . 38

Creating Local User Databases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Adding User Entries to Local User Databases . . . . . . . . . . . . . . . . . . . . . . . . . 39

Using the username Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Using the aaa local username Command . . . . . . . . . . . . . . . . . . . . . . . . 40

Assigning a Local User Database to a Virtual Router . . . . . . . . . . . . . . . . . . . 40

Enabling Local Authentication on the Virtual Router . . . . . . . . . . . . . . . . . . . . 41

Configuration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Local Authentication Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Configuring Tunnel Subscriber Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Configuring Name Server Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Configuration Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

DNS Primary and Secondary NMS Configuration . . . . . . . . . . . . . . . . . . 49

WINS Primary and Secondary NMS Configuration . . . . . . . . . . . . . . . . . . 51

Configuring Local Address Servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Local Address Pool Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Local Address Pool Aliases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Shared Local Address Pools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

SNMP Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Configuring a Local Address Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Configuring DHCP Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Creating an IP Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Single Clients per ATM Subinterface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Multiple Clients per ATM Subinterface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Configuring AAA Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Allowing or Denying Domain Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Configuration Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Using Domain Name Aliases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Manually Setting NAS-Port-Type Attribute . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Service-Description Attribute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Using RADIUS Route-Download Server to Distribute Routes . . . . . . . . . . . . . . . . 68

Format of Downloaded Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Framed-Route (RADIUS attribute 22) . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Cisco-AVPair (Cisco VSA 26-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

How the Route-Download Server Downloads Routes . . . . . . . . . . . . . . . . . . 69

JunosE 11.2.x Broadband Access Configuration Guide

Configuring the Route-Download Server to Download Routes . . . . . . . . . . . 69

Using the AAA Logical Line Identifier to Track Subscribers . . . . . . . . . . . . . . . . . . 73

How the Router Obtains and Uses the LLID . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

RADIUS Attributes in Preauthentication Request . . . . . . . . . . . . . . . . . . . . . . 74

Considerations for Using the LLID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Configuring the Router to Obtain the LLID for a Subscriber . . . . . . . . . . . . . . 75

Troubleshooting Subscriber Preauthentication . . . . . . . . . . . . . . . . . . . . . . . . 78

Using VSAs for Dynamic IP Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Traffic Shaping for PPP over ATM Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Mapping Application Terminate Reasons to RADIUS Terminate Codes . . . . . . . . . 81

Configuration Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Configuring Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Limiting Active Subscribers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Notifying RADIUS of AAA Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Configuring Standard RADIUS IPv6 Attributes for IPv6 Neighbor Discovery Router

Advertisements and DHCPv6 Prefix Delegation . . . . . . . . . . . . . . . . . . . . . . . 87

Duplicate IPv6 Prefix Check Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Configuring Duplicate IPv6 Prefix Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Propagation of LAG Subscriber Information to AAA and RADIUS . . . . . . . . . . . . . 89

Configuring the SRC Client . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Retrieval of DSL Line Rate Information from Access Nodes Overview . . . . . . . . . 99

DHCPv6 Local Address Pools for Allocation of IPv6 Prefixes Overview . . . . . . . 100

DHCPv6 Prefix Delegation Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Order of Preference in Determining the Local Address Pool for Allocating

Prefixes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Order of Preference in Allocating Prefixes and Assigning DNS Addresses to

Requesting Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Configuring the DHCPv6 Local Address Pools . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Limitation on the Number of Prefixes Used by Clients . . . . . . . . . . . . . . . . . 106

Using DHCPv6 Local Address Pools for Prefix Delegation over non-PPP Links

Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Chapter 2 Monitoring and Troubleshooting Remote Access . . . . . . . . . . . . . . . . . . . . . 109

Setting Baselines for Remote Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Setting a Baseline for AAA Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Setting a Baseline for AAA Route Downloads . . . . . . . . . . . . . . . . . . . . . . . . . 111

Setting a Baseline for COPS Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Setting a Baseline for Local Address Pool Statistics . . . . . . . . . . . . . . . . . . . . 111

Setting a Baseline for RADIUS Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Setting the Baseline for SRC Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

How to Monitor PPP Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Monitoring AAA Accounting Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Monitoring AAA Accounting Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Monitoring Accounting Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Monitoring Specific Virtual Router Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Monitoring the Default AAA Authentication Method List . . . . . . . . . . . . . . . . . . . . 114

Monitoring Domain and Realm Name Delimiters . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Monitoring Mapping Between User Domains and Virtual Routers . . . . . . . . . . . . 115

Monitoring Tunnel Subscriber Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Table of Contents

Monitoring Routing Table Address Lookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Monitoring the AAA Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Monitoring IP Addresses of Primary and Secondary DNS and WINS Name

Servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Monitoring AAA Profile Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Monitoring Statistics about the RADIUS Route-Download Server . . . . . . . . . . . . 119

Monitoring Routes Downloaded by the RADIUS Route-Download Server . . . . . . 121

Monitoring Chassis-Wide Routes Downloaded by RADIUS Route-Download

Servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Monitoring Authentication, Authorization, and Accounting Statistics . . . . . . . . . 124

Monitoring the Number of Active Subscribers Per Port . . . . . . . . . . . . . . . . . . . . . 126

Monitoring the Maximum Number of Active Subscribers Per Virtual Router . . . . 126

Monitoring Session Timeouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Monitoring Interim Accounting for Users on the Virtual Router . . . . . . . . . . . . . . . 127

Monitoring Virtual Router Groups Configured for AAA Broadcast Accounting . . . 127

Monitoring Configuration Information for AAA Local Authentication . . . . . . . . . . 128

Monitoring AAA Server Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Monitoring the COPS Layer Over SRC Connection . . . . . . . . . . . . . . . . . . . . . . . . . 131

Monitoring Statistics About the COPS Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Monitoring Local Address Pool Aliases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Monitoring Local Address Pools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Monitoring Local Address Pool Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Monitoring Shared Local Address Pools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Monitoring the Routing Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Monitoring the B-RAS License . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Monitoring the RADIUS Server Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Monitoring RADIUS Override Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Monitoring the RADIUS Rollover Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Monitoring RADIUS Server Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Monitoring RADIUS Services Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Monitoring RADIUS SNMP Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Monitoring RADIUS Accounting for L2TP Tunnels . . . . . . . . . . . . . . . . . . . . . . . . . 145

Monitoring RADIUS UDP Checksums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Monitoring RADIUS Server IP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Monitoring the RADIUS Attribute Used for IPv6 Neighbor Discovery Router

Advertisements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Monitoring the RADIUS Attribute Used for DHCPv6 Prefix Delegation . . . . . . . . 146

Monitoring Duplicate IPv6 Prefixes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Monitoring SRC Client Connection Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Monitoring SRC Client Connection Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Monitoring the SRC Client Version Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Monitoring Subscriber Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Monitoring Application Terminate Reason Mappings . . . . . . . . . . . . . . . . . . . . . . 156

Monitoring IPv6 Local Pools for DHCP Prefix Delegation By All Configured

Pools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Monitoring IPv6 Local Pools for DHCP Prefix Delegation By Pool Name . . . . . . . 158

Monitoring IPv6 Local Pool Statistics for DHCP Prefix Delegation . . . . . . . . . . . . 160

JunosE 11.2.x Broadband Access Configuration Guide

Part 2 Managing RADIUS and TACACS+

Chapter 3 Configuring RADIUS Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

RADIUS Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

RADIUS Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

RADIUS Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

RADIUS Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

RADIUS References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Subscriber AAA Access Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Supported RADIUS IETF Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Supported Juniper Networks VSAs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Subscriber AAA Accounting Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Supported RADIUS IETF Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Supported Juniper Networks VSAs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Tunnel Accounting Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

DSL Forum VSAs in AAA Access and Accounting Messages . . . . . . . . . . . . . . . . 182

CLI AAA Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

CLI Commands Used to Modify RADIUS Attributes . . . . . . . . . . . . . . . . . . . . . . . 184

RADIUS IETF Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

[4] NAS-IP-Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

[5] NAS-Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

[8] Framed-IP-Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

[9] Framed-Ip-Netmask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

[13] Framed-Compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

[25] Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

[30] Called-Station-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

[31] Calling-Station-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

[32] NAS-Identifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

[41] Acct-Delay-Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

[44] Acct-Session-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

[45] Acct-Authentic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

[49] Acct-Terminate-Cause . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

[50] Acct-Multi-Session-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

[51] Acct-Link-Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

[52] Acct-Input-Gigawords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

[53] Output-Gigawords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

[55] Event-Timestamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

[61] NAS-Port-Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

[64] Tunnel-Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

[65] Tunnel-Medium-Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

[66] Tunnel-Client-Endpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

[67] Tunnel-Server-Endpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

[68] Acct-Tunnel-Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

[77] Connect-Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

[82] Tunnel-Assignment-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

[83] Tunnel-Preference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

[87] NAS-Port-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

[90] Tunnel-Client-Auth-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

[91] Tunnel-Server-Auth-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

Table of Contents

[96] Framed-Interface-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

[97] Framed-Ipv6-Prefix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

[99] Framed-Ipv6-Route . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

[100] Framed-Ipv6-Pool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

[123] Delegated-Ipv6-Prefix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

[188] Ascend-Num-In-Multilink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

All Tunnel Server Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Juniper Networks Vendor-Specific Attributes . . . . . . . . . . . . . . . . . . . . . . . . . 212

[26-1] Virtual-Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

[26-10] Ingress-Policy-Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

[26-11] Egress-Policy-Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

[26-14] Service-Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

[26-15] PCR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

[26-16] SCR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

[26-17] MBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

[26-24] Pppoe-Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

[26-35] Acct-Input-Gigapackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

[26-36] Acct-Output-Gigapackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

[26-44] Tunnel-Interface-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

[26-45] Ipv6-Virtual-Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

[26-46] Ipv6-Local-Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

[26-47] Ipv6-Primary-DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

[26-48] Ipv6-Secondary-DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

[26-51] Disconnect-Cause . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218

[26-53] Service-Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218

[26-55] DHCP-Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

[26-56] DHCP-MAC-Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

[26-57] DHCP-GI-Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

[26-62] MLPPP-Bundle-Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

[26-63] Interface-Desc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

[26-81] L2C-Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

[26-92] L2C-Up-Stream-Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

[26-93] L2C-Down-Stream-Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

[26-129] Ipv6-NdRa-Prefix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222

[26-141] Downstream-Calculated-Qos-Rate . . . . . . . . . . . . . . . . . . . . . 222

[26-142] Upstream-Calculated-Qos-Rate . . . . . . . . . . . . . . . . . . . . . . . 223

[26-143] Max-Clients-Per-Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

[26-150] ICR-Partition-Id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224

All IPv6 Accounting Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224

[26-159] DHCP-Option 82 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

ANCP-Related Juniper Networks VSAs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

DSL Forum Vendor-Specific Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227

Including or Excluding Attributes in RADIUS Messages . . . . . . . . . . . . . . . . . 229

Ignoring Attributes When Receiving Access-Accept Messages . . . . . . . . . . 229

Chapter 4 Configuring RADIUS Dynamic-Request Server . . . . . . . . . . . . . . . . . . . . . . . 231

RADIUS Dynamic-Request Server Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231

RADIUS Dynamic-Request Server Platform Considerations . . . . . . . . . . . . . . . . 232

RADIUS Dynamic-Request Server References . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

JunosE 11.2.x Broadband Access Configuration Guide

How RADIUS Dynamic-Request Server Works . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

RADIUS-Initiated Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Disconnect Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Message Exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Supported Error-Cause Codes (RADIUS Attribute 101) . . . . . . . . . . . . . . . . . 234

Qualifications for Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234

Security/Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Configuring RADIUS-Initiated Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

RADIUS-Initiated Change of Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Change-of-Authorization Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

Message Exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

Supported Error-Cause Codes (RADIUS Attribute 101) . . . . . . . . . . . . . . . . . 236

Qualifications for Change of Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Security/Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Configuring RADIUS-Initiated Change of Authorization . . . . . . . . . . . . . . . . . . . . 238

RADIUS Dynamic-Request Server Commands . . . . . . . . . . . . . . . . . . . . . . . . . . 238

Monitoring RADIUS Dynamic-Request Servers . . . . . . . . . . . . . . . . . . . . . . . . . . 240

Chapter 5 Configuring RADIUS Relay Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

RADIUS Relay Server Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

RADIUS Relay Server Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

RADIUS Relay Server References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

How RADIUS Relay Server Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

Authentication and Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Terminating the Wireless Subscriber’s Connection . . . . . . . . . . . . . . . . . . . . 244

RADIUS Relay Server and the SRC Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

Using the SRC Software for Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

Using the SRC Application for Accounting . . . . . . . . . . . . . . . . . . . . . . . . . . 244

Configuring RADIUS Relay Server Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Monitoring RADIUS Relay Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

Chapter 6 RADIUS Attribute Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

RADIUS IETF Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

Juniper Networks VSAs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

DSL Forum VSAs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

Pass Through RADIUS Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268

RADIUS Attributes References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268

Chapter 7 Application Terminate Reasons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

AAA Terminate Reasons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

L2TP Terminate Reasons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272

PPP Terminate Reasons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288

RADIUS Client Terminate Reasons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295

Chapter 8 Monitoring RADIUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297

Monitoring Override Settings of RADIUS IETF Attributes . . . . . . . . . . . . . . . . . . . 297

Monitoring the NAS-Port-Format RADIUS Attribute . . . . . . . . . . . . . . . . . . . . . . 298

Monitoring the Calling-Station-Id RADIUS Attribute . . . . . . . . . . . . . . . . . . . . . . 299

Monitoring the NAS-Identifier RADIUS Attribute . . . . . . . . . . . . . . . . . . . . . . . . . 299

Table of Contents

Monitoring the Format of the Remote-Circuit-ID for RADIUS . . . . . . . . . . . . . . . 299

Monitoring the Delimiter Character in the Remote-Circuit-ID for RADIUS . . . . . 300

Monitoring the Acct-Session-Id RADIUS Attribute . . . . . . . . . . . . . . . . . . . . . . . 300

Monitoring the DSL-Port-Type RADIUS Attribute . . . . . . . . . . . . . . . . . . . . . . . . 300

Monitoring the Connect-Info RADIUS Attribute . . . . . . . . . . . . . . . . . . . . . . . . . . 301

Monitoring the NAS-Port-ID RADIUS Attribute . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

Monitoring Included RADIUS Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

Monitoring Ignored RADIUS Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

Setting the Baseline for RADIUS Dynamic-Request Server Statistics . . . . . . . . . 304

Monitoring RADIUS Dynamic-Request Server Statistics . . . . . . . . . . . . . . . . . . . 304

Monitoring the Configuration of the RADIUS Dynamic-Request Server . . . . . . . 305

Setting a Baseline for RADIUS Relay Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . 306

Monitoring RADIUS Relay Server Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306

Monitoring the Configuration of the RADIUS Relay Server . . . . . . . . . . . . . . . . . 308

Monitoring the Status of RADIUS Relay UDP Checksums . . . . . . . . . . . . . . . . . . 309

Monitoring the Status of ICR Partition Accounting . . . . . . . . . . . . . . . . . . . . . . . 309

Chapter 9 Configuring TACACS+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

TACACS+ Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

AAA Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

Administrative Login Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

Privilege Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

Login Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

Accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

TACACS+ Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

TACACS+ References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

Before You Configure TACACS+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

Configuring TACACS+ Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Configuring Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Configuring Accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Chapter 10 Monitoring TACACS+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323

Setting Baseline TACACS+ Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323

Monitoring TACACS+ Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323

Monitoring TACACS+ Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Part 3 Managing L2TP

Chapter 11 L2TP Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329

L2TP Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329

L2TP Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

Implementing L2TP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

Sequence of Events on the LAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

Sequence of Events on the LNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332

Packet Fragmentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333

L2TP Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333

L2TP Module Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334

ERX7xx Models, ERX14xx Models, and the ERX310 Router . . . . . . . . . . . . . . 334

E120 Router and E320 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334

Sessions and Tunnels Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

JunosE 11.2.x Broadband Access Configuration Guide

L2TP References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336

Chapter 12 Configuring an L2TP LAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

LAC Configuration Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

Modifying L2TP LAC Default Settings for Managing Destinations, Tunnels, and

Sessions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338

Generating UDP Checksums in Packets to L2TP Peers . . . . . . . . . . . . . . . . . . . . 339

Specifying a Destruct Timeout for L2TP Tunnels and Sessions . . . . . . . . . . . . . 339

Preventing Creation of New Destinations, Tunnels, and Sessions . . . . . . . . . . . . 340

Preventing Creation of New Destinations, Tunnels, and Sessions on the

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340

Preventing Creation of New Tunnels and Sessions at a Destination . . . . . . 340

Preventing Creation of New Sessions for a Tunnel . . . . . . . . . . . . . . . . . . . . . 341

Specifying a Drain Timeout for a Disconnected Tunnel . . . . . . . . . . . . . . . . . 341

Shutting Down Destinations, Tunnels, and Sessions . . . . . . . . . . . . . . . . . . . . . . 341

Closing Existing and Preventing New Destinations, Tunnels, and Sessions

on the Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

Closing Existing and Preventing New Tunnels and Sessions for a

Destination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

Closing Existing and Preventing New Sessions in a Specific Tunnel . . . . . . . 342

Closing a Specific Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

Specifying the Number of Retransmission Attempts . . . . . . . . . . . . . . . . . . . . . . 342

Configuring Calling Number AVP Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343

Calling Number AVP 22 Configuration Tasks . . . . . . . . . . . . . . . . . . . . . . . . . 347

Configuring the Fallback Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347

Disabling the Calling Number AVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351

Mapping a User Domain Name to an L2TP Tunnel Overview . . . . . . . . . . . . . . . . 351

Mapping User Domain Names to L2TP Tunnels from Domain Map Tunnel

Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352

Mapping User Domain Names to L2TP Tunnels from Tunnel Group Tunnel

Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356

Configuring the RX Speed on the LAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358

Managing the L2TP Destination Lockout Process . . . . . . . . . . . . . . . . . . . . . . . . 359

Modifying the Lockout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359

Verifying That a Locked-Out Destination Is Available . . . . . . . . . . . . . . . . . . 360

Configuring a Lockout Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360

Unlocking a Destination that is Currently Locked Out . . . . . . . . . . . . . . . . . . 361

Starting an Immediate Lockout Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361

Managing Address Changes Received from Remote Endpoints . . . . . . . . . . . . . . 361

Configuring LAC Tunnel Selection Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 362

Configuring the Failover Between Preference Levels Method . . . . . . . . . . . . 363

Configuring the Failover Within a Preference Level Method . . . . . . . . . . . . . 364

Configuring the Maximum Sessions per Tunnel . . . . . . . . . . . . . . . . . . . . . . 364

Configuring the Weighted Load Balancing Method . . . . . . . . . . . . . . . . . . . . 365

Chapter 13 Configuring an L2TP LNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367

LNS Configuration Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367

Configuring an LNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368

Creating an L2TP Destination Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370

Creating an L2TP Host Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371

Table of Contents

Configuring the Maximum Number of LNS Sessions . . . . . . . . . . . . . . . . . . . . . . 372

Configuring the RADIUS Connect-Info Attribute on the LNS . . . . . . . . . . . . . . . . 372

Overriding LNS Out-of-Resource Result Codes 4 and 5 . . . . . . . . . . . . . . . . . . . . 373

Overriding the Result Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373

Displaying the Current Override Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373

Selecting Service Modules for LNS Sessions Using MLPPP . . . . . . . . . . . . . . . . . 374

Assigning Bundled Group Identifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375

Overriding All Endpoint Discriminators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375

Enabling Tunnel Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376

Creating Persistent Tunnels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376

Testing Tunnel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376

Managing L2TP Destinations, Tunnels, and Sessions . . . . . . . . . . . . . . . . . . . . . . 377

Configuring Disconnect Cause Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377

Generating the Disconnect Cause AVP Globally . . . . . . . . . . . . . . . . . . . . . . 378

Generating the Disconnect Cause AVP with a Host Profile . . . . . . . . . . . . . . 378

Enabling RADIUS Accounting for Disconnect Cause . . . . . . . . . . . . . . . . . . . 378

Displaying Disconnect Cause Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379

Configuring the Receive Window Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379

Configuring the Default Receive Window Size . . . . . . . . . . . . . . . . . . . . . . . . 379

Configuring the Receive Window Size on the LAC . . . . . . . . . . . . . . . . . . . . 380

Configuring the Receive Window Size on the LNS . . . . . . . . . . . . . . . . . . . . . 381

Configuring Peer Resynchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382

Configuring Peer Resynchronization for L2TP Host Profiles and AAA Domain

Map Tunnels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383

Configuring the Global L2TP Peer Resynchronization Method . . . . . . . . . . . 384

Using RADIUS to Configure Peer Resynchronization . . . . . . . . . . . . . . . . . . . 385

Configuring L2TP Tunnel Switch Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385

Applying the L2TP Tunnel Switch Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385

Configuration Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386

Configuring L2TP AVPs for Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386

Configuration Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386

Enabling Tunnel Switching on the Router . . . . . . . . . . . . . . . . . . . . . . . . 387

Configuring L2TP Tunnel Switch Profiles . . . . . . . . . . . . . . . . . . . . . . . . 387

Applying L2TP Tunnel Switch Profiles by Using AAA Domain Maps . . . 388

Applying L2TP Tunnel Switch Profiles by Using AAA Tunnel Groups . . 389

Applying Default L2TP Tunnel Switch Profiles . . . . . . . . . . . . . . . . . . . . 389

Applying L2TP Tunnel Switch Profiles by Using RADIUS . . . . . . . . . . . . 390

Configuring the Transmit Connect Speed Calculation Method . . . . . . . . . . . . . . 391

Transmit Connect Speed Calculation Methods . . . . . . . . . . . . . . . . . . . . . . . 391

Static Layer 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392

Dynamic Layer 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392

QoS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392

Actual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393

Transmit Connect Speed Calculation Examples . . . . . . . . . . . . . . . . . . . . . . 393

Example 1: L2TP Session over ATM 1483 Interface . . . . . . . . . . . . . . . . 393

Example 2: L2TP Session over Ethernet VLAN Interface . . . . . . . . . . . . 394

Transmit Connect Speed Reporting Considerations . . . . . . . . . . . . . . . . . . . 394

Session Termination for Dynamic Speed Timeout . . . . . . . . . . . . . . . . . 394

Advisory Speed Precedence for VLANs over Bridged Ethernet . . . . . . . 394

JunosE 11.2.x Broadband Access Configuration Guide

Using AAA Domain Maps to Configure the Transmit Connect Speed

Calculation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395

Using AAA Tunnel Groups to Configure the Transmit Connect Speed

Calculation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395

Using AAA Default Tunnel Parameters to Configure the Transmit Connect

Speed Calculation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396

Using RADIUS to Configure the Transmit Connect Speed Calculation

Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397

PPP Accounting Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 398

Chapter 14 Configuring L2TP Dial-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401

L2TP Dial-Out Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401

Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402

Network Model for Dial-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402

Dial-Out Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403

Dial-Out Operational States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403

Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403

Virtual Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404

Targets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404

Sessions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404

Outgoing Call Setup Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406

Access-Request Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406

Access-Accept Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406

Outgoing Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407

Mutual Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408

Route Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408

L2TP Dial-Out Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408

L2TP Dial-Out References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408

Before You Configure L2TP Dial-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408

Configuring L2TP Dial-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409

Monitoring L2TP Dial-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411

Chapter 15 L2TP Disconnect Cause Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413

L2TP Disconnect Cause Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413

Chapter 16 Monitoring L2TP and L2TP Dial-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417

Monitoring the Mapping for User Domains and Virtual Routers with AAA . . . . . . 417

Monitoring Configured Tunnel Groups with AAA . . . . . . . . . . . . . . . . . . . . . . . . . . 419

Monitoring Configuration of Tunnel Parameters with AAA . . . . . . . . . . . . . . . . . 422

Monitoring Global Configuration Status on E Series Routers . . . . . . . . . . . . . . . . 423

Monitoring Detailed Configuration Information for Specified Destinations . . . . . 425

Monitoring Locked Out Destinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 427

Monitoring Configured Destination Profiles or Host Profiles . . . . . . . . . . . . . . . . 427

Monitoring Configured and Operational Status of all Destinations . . . . . . . . . . . 429

Monitoring Statistics on the Cause of a Session Disconnection . . . . . . . . . . . . . 430

Monitoring Detailed Configuration Information about Specified Sessions . . . . . 431

Monitoring Configured and Operational Summary Status . . . . . . . . . . . . . . . . . . 432

Monitoring Configured Switch Profiles on Router . . . . . . . . . . . . . . . . . . . . . . . . . 433

Monitoring Detailed Configuration Information about Specified Tunnels . . . . . . 434

Monitoring Configured and Operational Status of All Tunnels . . . . . . . . . . . . . . 436

Table of Contents

Monitoring Chassis-wide Configuration for L2TP Dial-out . . . . . . . . . . . . . . . . . . 437

Monitoring Status of Dial-out Sessions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 442

Monitoring Dial-out Targets within the Current VR Context . . . . . . . . . . . . . . . . . 443

Monitoring Operational Status within the Current VR Context . . . . . . . . . . . . . . 444

Part 4 Managing DHCP

Chapter 17 DHCP Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 449

DHCP Overview Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 449

Session and Resource Control Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450

DHCP Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450

DHCP References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451

Configuring the DHCP Access Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451

Configuring DHCP Proxy Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451

Logging DHCP Packet Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 453

Viewing and Deleting DHCP Client Bindings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 453

Chapter 18 DHCP Local Server Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457

Embedded DHCP Local Server Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457

DHCP Local Server and Client Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 457

Equal-Access Mode Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 458

Local Pool Selection and Address Allocation . . . . . . . . . . . . . . . . . . . . . . . . 458

The Connection Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459

Standalone Mode Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460

Local Pool Selection and Address Allocation . . . . . . . . . . . . . . . . . . . . . . . . 460

Server Management Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 462

DHCP Local Server Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 462

DHCP Local Server Configuration Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 463

Chapter 19 Configuring DHCP Local Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465

Configuring the DHCP Local Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465

Basic Configuration of DHCP Local Server . . . . . . . . . . . . . . . . . . . . . . . . . . 465

Limiting the Number of IP Addresses Supplied by DHCP Local Server . . . . 466

Excluding IP Addresses from Address Pools . . . . . . . . . . . . . . . . . . . . . . . . . 467

Configuring DHCP Local Server to Support Creation of Dynamic Subscriber

Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 467

Differentiating Between Clients with the Same Client ID or Hardware

Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468

Logging Out DHCP Local Server Subscribers . . . . . . . . . . . . . . . . . . . . . . . . 469

Clearing an IP DHCP Local Server Binding . . . . . . . . . . . . . . . . . . . . . . . . . . 469

Using SNMP Traps to Monitor DHCP Local Server Events . . . . . . . . . . . . . . 470

Using DHCP Local Server Event Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 470

Configuring DHCP Local Address Pools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 471

Basic Configuration of DHCP Local Address Pools . . . . . . . . . . . . . . . . . . . . 471

Linking Local Address Pools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473

Setting Grace Periods for Address Leases . . . . . . . . . . . . . . . . . . . . . . . . . . . 474

Configuring AAA Authentication for DHCP Local Server Standalone Mode . . . . 474

Configuring the DHCPv6 Local Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 477

Deleting DHCPv6 Client Bindings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 478

Configuring the Router to Work with the SRC Software . . . . . . . . . . . . . . . . . . . . 479

JunosE 11.2.x Broadband Access Configuration Guide

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