Switched ATM L2VPN
draft-metz-switched-atm-l2vpn-00
| Document | Type |
Expired Internet-Draft
(individual)
Expired & archived
|
|
|---|---|---|---|
| Author | Christopher Y. Metz | ||
| Last updated | 2003-06-18 | ||
| RFC stream | (None) | ||
| Intended RFC status | (None) | ||
| Formats | |||
| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | Expired | |
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:
Abstract
Many providers operate ATM networks that support a suite of network services. These networks employ ATM signaling and routing protocols to expedite connection setup and recovery. Over time these providers will migrate all or portions of their ATM infrastructure and services to an IP/MPLS-based Packet Switched Network (PSN) thus leading to the creation of ATM L2VPNs. This document describes a solution that supports dynamic signaling and routing of point-to-point switched ATM connections (i.e. VP or VC) across an IP/MPLS network. It is based on the L2VPN (VPWS) architecture which employs an {attachment circuit, PE, pseudo-wire, PE, attachment circuit} tuple to define a distinct point- to-point L2 connection between two end-points within the VPN [PPVPN L2]. The presumption is that the L2 connection is a switched ATM VC or VP and that one or both ACs and the PW are established in real-time using routing and signaling protocol machinery native to the ATM and IP/MPLS networks. We call this a switched ATM L2VPN. The key component of a switched ATM L2VPN is a PWE3 native service processing (NSP) function on the PE that serves as an interworking gateway between native ATM and IP/MPLS signaling and routing protocols. The NSP learns of ATM prefixes reachable through the local attachment circuits. The ATM prefixes are exchanged with a co-resident MP-BGP instance for automatic distribution and discovery of ATM reachability to participating PEs and their directly-attached ATM networks. The NSP is capable of processing the necessary native ATM signaling messages for real-time connection management. The NSP interacts with the co- resident PWE3 signaling machinery for concurrent PW connection management. Extensions to the PWE3 signaling protocol are required to support dynamic single-sided provisioning and to transport ATM signaling parameters between the NSPs for connection management purposes. Extensions to the MP-BGP protocol are needed distribute ATM prefixes and associated next hop information between PEs.
Authors
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)