Describes PPPoE deployment over ATM, outlining integration methods and the benefits of using ATM as the underlying transport.
A PPPoEoA is a protocol encapsulation method that
-
uses ATM Adaptation Layer 5 Multiplexed Encapsulation (AAL5MUX) to carry PPPoE over ATM permanent virtual circuits (PVCs),
-
provides efficiency gain over AAL5 LLC/SNAP encapsulation, and
-
reduces Subnetwork Access Protocol (SNAP) encapsulation bandwidth usage by using multiplexed (MUX) encapsulation to reduce the number of cells needed to carry voice packets.
You can configure PPPoE over ATM interfaces (PPPoEoA) on Cisco IOS XE Catalyst SD-WAN devices that support ADSL. Deploying the PPPoEoA over ATM AAL5MUX feature in a VoIP environment results in improved throughput and bandwidth usage.