Cisco's implementations of AToM and VPLS are based on IETF drafts and standards. The standardization of AToM and VPLS is being tackled in the IETF PWE3 Working Group, while the signaling and autodiscovery aspects are being looked at in the L2VPN Working Group of the IETF. Cisco either fully or partially supports the following IETF drafts and RFCs at press time:
RFC 3916, "Requirements for Pseudowire Emulation Edge-to-Edge (PWE3)"
RFC 4448, "Encapsulation Methods for Transport of Ethernet over IP/MPLS Networks"
RFC 4447, "Pseudowire Setup and Maintenance Using LDP"
RFC 3985, "PWE3 Architecture"
RFC 4197, "Requirements for Edge-to-Edge Emulation of TDM Circuits over Packet Switching Networks (PSN)"
RFC 4446, "IANA Allocations for Pseudowire Edge-to-Edge Emulation (PWE3)"
"Requirements for Virtual Private LAN Services (VPLS)"
"L2VPN Framework"
"Virtual Private LAN Service"
"Virtual Private LAN Services over MPLS"
"Pseudowire (PW) Management Information Base"
"Pseudowire (PW) over MPLS PSN Management Information Base"
"Definitions for Textual Conventions and Object Identities for Pseudowire Management"
"SONET/SDH Circuit Emulation over Packet (CEP)"
"Ethernet Pseudowire (PW) Management Information Base"
"PWE3 Fragmentation and Reassembly"
"Encapsulation Methods for Transport of Frame Relay over MPLS Networks"
"Encapsulation Methods for Transport of ATM over MPLS Networks"
"Encapsulation Methods for Transport of PPP/HDLC over MPLS Networks"
"Pseudowire Virtual Circuit Connectivity Verification (VCCV)"
"PWE3 Frame Check Sequence Retention"
"Structure-aware TDM Circuit Emulation Service over Packet Switched Network (CESoPSN)"
"PWE3 ATM Transparent Cell Transport Service"
"Pseudowire (PW) OAM Message Mapping"
"Requirements for Interdomain Pseudowires"
"Segmented Pseudowire"
"Control Protocol Extensions for Setup of TDM Pseudowires"
"Dynamic Placement of Multi-Segment Pseudowires"
"An Architecture for Multi-Segment Pseudowire Emulation Edge-to-Edge"
"Target Choice of Pseudowire Type"
"Pseudowire Attachment Identifiers for Aggregation and VPN Autodiscovery"
"Encapsulation Methods for Transport of Fibre Channel Frames over MPLS Networks"
