Introduction
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Model 3086 G.SHDSL Integrated Access Device User Guide
4 • Basic Application Configurations
Introduction
The Model 3086 IAD comes with two data ports: a serial port ( V.35 or X.21), and an Ethernet port. Serial
port data is not processed by the router or bridge core in the 3086, data is transmitted unprocessed over the
DSL link. Data from the Ethernet port is processed by the 3086 bridge or router core and sent over HDLC or
ATM encapsulation over the DSL link.
The 3086 can be used as a simple modem – transporting serial data from a router or multiplexer connected to
the V.35 or X.21 port. In this case the user configures DSL and serial port features only.
The 3086 can concurrently transport Serial and Ethernet traffic, the serial and Ethernet ports are activated, and
the user must assign DSL bandwidth for both serial and Ethernet traffic. Since Ethernet layer is activated, the
user must configure the routing or bridging features and must choose from HDLC or ATM encapsulation
The 3086 can be used to transport Ethernet traffic only, via its 10/100 Base-T LAN across a campus or across
a WAN, in this case, the serial port is not activated. In addition to configuring the DSL link, the user must
configure the routing or bridging features and must choose from HDLC or ATM encapsulation.
Configuration for these applications is presented in the following sections. The 3086 is used to transport serial
data only, serial plus Ethernet, or Ethernet only data. Since the configuration of the router or bridge and the
ATM or HDLC Features are considerably more complex than the DSL and data port layers, we present physi-
cal layer configuration of serial port and serial port plus Ethernet first as the foundation from which the upper
layers can be configured. An extensive section is devoted to the Bridge/Router, and HDLC/ATM application
configuration.
What follows is a brief description and a table summarizing the parameters for bridged and routed WAN ser-
vices achieved with the Model 3086.
The basic applications are divided according to whether the application is bridged or routed.
The bridged applications are RFC 1483 Bridged, PPPoA Bridged, and HDLC Bridged.
The routed applications are RFC 1483, PPPoA, IPoA, PPPoE, and HDLC.
Another way of organizing the applications is according to the type of encapsulation: PPP, RFC 1483, or Frame
Relay. PPP encapsulation is available as PPPoA bridged or routed and PPPoE. RFC 1483 and Frame Relay can
be configured for bridged and routed connections.
