Cisco Cisco IOS Software Release 12.0(22)S

This feature module describes the ATM adaptation layer 5 (AAL5)  over Multiprotocol Label Switching 
(MPLS) feature for transporting AAL5 service data units (SDUs) across an IP/MPLS backbone. This 
document contains information about the benefits of AAL5  over MPLS and lists supported platforms. 
It also provides configuration tasks, examples and related commands.

This document includes the following sections:

The AAL5 over MPLS feature provides an ATM permanent virtual circuit (PVC) for transporting AAL5 
SDUs across an IP/MPLS backbone with rate-limit policing and configurable PVC priority value. A 
dynamic MPLS tunnel is configured to enable label imposition and disposition of encapsulated ATM 
SDUs transported between two edge routers having a Label Distribution Protocol (LDP) neighbor 
relationship.

12.0(10)ST

This feature was introduced to support the Cisco 12000 Series router.

12.0(21)ST

This feature was updated to support an additional line card.

12.0(22)S

This feature was integrated into Cisco IOS Release 12.0(22)S.