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Cisco IP Solution Center L2VPN and Carrier Ethernet User Guide, 6.0
Appendix E ISC Layer 2 VPN Concepts
L2VPN Service Provisioning
Figure E-7 Configuring AAL5 and Cell Relay over MPLS
Frame Relay over MPLS (FRoMPLS)
With Cisco AToM for Frame Relay, customer Frame Relay traffic can be encapsulated in MPLS packets
and forwarded to destinations required by the customer. Cisco AToM allows service providers to quickly
add new sites with less effort than typical Frame Relay provisioning.
Frame Relay over MPLS enables a service provider to transport Frame Relay frames across an MPLS
backbone. This extends the reachability of Frame Relay and allows service providers to aggregate frame
transport across a common packet backbone. The service provider can integrate an existing Frame Relay
environment with the packet backbone to improve operational efficiency and to implement the
high-speed packet interfaces to scale the Frame Relay implementations.
Transporting Frame Relay frames across MPLS networks provides a number of benefits, including:
• Frame Relay extended service.
• Aggregation to a higher speed backbone, such as OC-192, to scale Frame Relay implementations.
• Improved operational efficiency—the MPLS backbone becomes the single network that integrates
the various existing networks and services.
Topology for FRoMPLS
Only the single PE scenario is supported. (See Figure E-8.)
ATM virtual circuits