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C
H A P T E R
This chapter shows you how to set up the IES-1248 to convert PPPoA frames to PPPoE traffic
and vice versa.
31.1 PPPoA to PPPoE Overview
Before migrating to an Ethernet infrastructure, a broadband network might consist of PPPoA
connections between the CPE devices and the DSLAM and PPPoE connections from the
DSLAM to the Broadband Remote Access Server (BRAS). The following figure shows a
network example.
Figure 112 Mixed PPPoA-to-PPPoE Broadband Network Example
Client
In order to allow communication between the end points (the CPE devices and the BRAS),
you need to configure the DSLAM (the IES-1248) to translate PPPoA frames to PPPoE
packets and vise versa.
When PPPoA packets are received from the CPE, the ATM headers are removed and the IES-
1248 adds PPPoE and Ethernet headers before sending the packets to the BRAS. When the
IES-1248 receives PPPoE packets from the BRAS, PPPoE and Ethernet headers are stripped
and necessary PVC information (such as encapsulation type) is added before forwarding to the
designated CPE.
31.2 PPPoA to PPPoE Screen
Use this screen to set up PPPoA to PPPoE conversions on each port. This conversion is set up
by creating a PAE PVC. See
creating PVCs. To open this screen, click Advanced Application, PPPoA to PPPoE.
IES-1248-71/73 User's Guide
PPPoA to PPPoE
DSLAM
PPPoA
Chapter 16 on page 121
31
BRAS
PPPoE
for background information about
217
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