ZyXEL Communications SAM1316-22, Руководство пользователя

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SAM1316-22 User’s Guide
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PPPoA to PPPoE
This chapter shows you how to set up the SAM1316-22 to convert PPPoA frames to
PPPoE traffic and vice versa.
29.1 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 98 Mixed PPPoA-to-PPPoE Broadband Network Example
In order to allow communication between the end points (the CPE devices and the
BRAS), you need to configure the DSLAM (the SAM1316-22) 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 SAM1316-22 adds PPPoE and Ethernet headers before sending the
packets to the BRAS. When the SAM1316-22 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.
29.2 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
Chapter 13 on page 91 for
PPPoA
PPPoE
DSLAM
Client BRAS