The classical IP
over ATM approach invests in routers and bridges to extend them as intelligent switches.
Several addressing models - classical IP
, WATM subnet, and peer models - have been proposed to realize the IP protocol, in particular, over ATM (IP-over-ATM).
S3's ATM Fastpath Component provides a complete dataplane implementation for core ATM functions: Classical IP
over AAL5 for data and AAL2 for Voice over ATM.
Asynchronous Transfer Mode (ATM) features include RFC1483 encapsulation (IP, bridging and encapsulated routing), PPP over ATM (LLC and VC multiplexing), classical IP
(RFC1577), traffic shaping (UBR and CBR), PPP over Ethernet relay agent, and support for up to eight permanent virtual circuits (PVC).