Configuring Ip/Atm; Figure 12: E Series Router Ip/Atm Access Connection; Figure 13: Structure Of The Atm Interface Design - Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X Configuration Manual

Chapter 1: Planning Your Network

Configuring IP/ATM

The router supports IP over ATM PVCs on ATM line modules. This support allows
service providers to receive traffic from subscribers who have CPE equipment, such
as routers with ATM interfaces, to take in traffic from other network devices that use
ATM, such as DSLAMs, and to connect to service providers with ATM backbone
structures.
Figure 12 on page 19 shows an IP/ATM access connection.

Figure 12: E Series Router IP/ATM Access Connection

Figure 13 on page 19 shows the structure of the ATM interface. For ATM, this can
be SONET, DS3, or E3 as supported by the different line modules. The major ATM
interface sits on top of the SONET/DS3/E3 resource, and the subinterfaces sit on top
of the major interface. The ATM subinterfaces connect to the IP interface layer.

Figure 13: Structure of the ATM Interface Design

Figure 14 on page 20 shows the structure of the ATM protocols. The physical layer
(SONET and/or DSx/Ex) is the foundation and provider of layer 1 framing service.
The ATM layer is on top and provides cell, circuit, and OAM services. The AAL5 layer
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Configuring Data Link-Layer Interfaces