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Chapter 11
L2TP Overview
Layer 2 Tunneling Protocol (L2TP) is a client-server protocol that allows Point-to-Point
Protocol (PPP) to be tunneled across a network. This chapter includes the following
topics that provide information for configuring L2TP on the Juniper Networks E Series
Broadband Services Routers.
■
L2TP Overview on page 335
■
L2TP Terminology on page 336
■
Implementing L2TP on page 337
■
Packet Fragmentation on page 339
■
L2TP Platform Considerations on page 340
■
L2TP Module Requirements on page 340
■
Sessions and Tunnels Supported on page 341
■
L2TP References on page 342
L2TP Overview
L2TP encapsulates layer 2 packets, such as PPP, for transmission across a network.
An L2TP access concentrator (LAC), configured on an access device, such as an E
Series router, receives packets from a remote client and forwards them to an L2TP
network server (LNS), on a remote network.
You can configure your router to act as an LAC in pass-through mode in which the
LAC receives packets from a remote client and then forwards them at layer 2 directly
to the LNS.
The E Series router creates tunnels dynamically by using authentication, authorization,
and accounting (AAA) authentication parameters and transmits L2TP packets to the
LNS via IP/User Datagram Protocol (UDP). Traffic travels in an L2TP
session
. A tunnel
is an aggregation of one or more sessions. Figure 7 on page 336 and Figure 8 on
page 336 show the E Series router in typical LAC and LNS arrangements.
L2TP Overview
■
335
Содержание JUNOSE 11.1.X - BROADBAND ACCESS CONFIGURATION GUIDE 6-4-2010
Страница 6: ...vi...
Страница 28: ...xxviii Table of Contents JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 36: ...xxxvi List of Tables JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 42: ...2 Managing Remote Access JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 208: ...168 Monitoring IPv6 Local Pool Statistics for DHCP Prefix Delegation JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 210: ...170 Managing RADIUS and TACACS JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 280: ...240 CLI Commands Used to Modify RADIUS Attributes JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 298: ...258 Monitoring RADIUS Relay Server JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 342: ...302 RADIUS Client Terminate Reasons JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 374: ...334 Managing L2TP JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 414: ...374 Configuring the Weighted Load Balancing Method JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 450: ...410 PPP Accounting Statistics JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 498: ...458 Monitoring Operational Status within the Current VR Context JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 500: ...460 Managing DHCP JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 516: ...476 DHCP Local Server Configuration Tasks JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 562: ...522 Configuring DHCP Relay Proxy JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 622: ...582 Managing the Subscriber Environment JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 638: ...598 Subscriber Management Configuration Examples JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 642: ...602 Monitoring Active IP Subscribers Created by Subscriber Management JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 678: ...638 Monitoring Active IP Subscribers Created by Subscriber Management JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 680: ...640 Managing Subscriber Services JUNOSe 11 1 x Broadband Access Configuration Guide...
Страница 773: ...Part 7 Index Index on page 735 Index 733...
Страница 774: ...734 Index JUNOSe 11 1 x Broadband Access Configuration Guide...