Framework and Requirements for Layer 1 Virtual Private Networks
RFC 4847

Document Type RFC - Informational (April 2007; No errata)
Last updated 2013-03-02
Stream IETF
Formats plain text pdf html
Stream WG state (None)
Consensus Unknown
Document shepherd No shepherd assigned
IESG IESG state RFC 4847 (Informational)
Telechat date
Responsible AD Ross Callon
Send notices to l1vpn-chairs@ietf.org
Network Working Group                                     T. Takeda, Ed.
Request for Comments: 4847                                           NTT
Category: Informational                                       April 2007

    Framework and Requirements for Layer 1 Virtual Private Networks

Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The IETF Trust (2007).

Abstract

   This document provides a framework and service level requirements for
   Layer 1 Virtual Private Networks (L1VPNs).  This framework is
   intended to aid in developing and standardizing protocols and
   mechanisms to support interoperable L1VPNs.

   The document examines motivations for L1VPNs, high level (service
   level) requirements, and outlines some of the architectural models
   that might be used to build L1VPNs.

Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................3
   3. Overview ........................................................5
      3.1. Network Topology ...........................................5
      3.2. Introducing Layer 1 VPNs ...................................5
      3.3. Current Technologies for Dynamic Layer 1 Provisioning ......6
      3.4. Relationship with ITU-T ....................................7
   4. Motivations .....................................................8
      4.1. Basic Layer 1 Services .....................................8
           4.1.1. L1VPN for Dynamic Layer 1 Provisioning ..............9
      4.2. Merits of L1VPN ............................................9
           4.2.1. Customer Merits .....................................9
           4.2.2. Provider Merits ....................................10
      4.3. L1VPN Deployment Scenarios ................................10
           4.3.1. Multi-Service Backbone .............................11
           4.3.2. Carrier's Carrier ..................................11
           4.3.3. Layer 1 Resource Trading ...........................12
           4.3.4. Inter-AS and Inter-SP L1VPNs .......................12

Takeda                       Informational                      [Page 1]
RFC 4847                 Layer 1 VPN Framework                April 2007

           4.3.5. Scheduling Service .................................13
   5. Reference Model ................................................14
      5.1. Management Systems ........................................15
   6. Generic Service Description ....................................15
      6.1. CE Construct ..............................................15
      6.2. Generic Service Features ..................................16
   7. Service Models .................................................16
      7.1. Management-Based Service Model ............................17
      7.2. Signaling-Based Service Model (Basic Mode) ................17
           7.2.1. Overlay Service Model ..............................18
      7.3. Signaling and Routing Service Model (Enhanced Mode) .......19
           7.3.1. Overlay Extension Service Model ....................20
           7.3.2. Virtual Node Service Model .........................20
           7.3.3. Virtual Link Service Model .........................21
           7.3.4. Per-VPN Peer Service Model .........................22
   8. Service Models and Service Requirements ........................22
      8.1. Detailed Service Level Requirements .......................24
   9. Recovery Aspects ...............................................25
      9.1. Recovery Scope ............................................25
      9.2. Recovery Resource Sharing Schemes .........................26
   10. Control Plane Connectivity ....................................27
      10.1. Control Plane Connectivity between a CE and a PE .........27
      10.2. Control Plane Connectivity between CEs ...................28
   11. Manageability Considerations ..................................29
   12. Security Considerations .......................................31
      12.1. Types of Information .....................................32
      12.2. Security Features ........................................32
      12.3. Scenarios ................................................33
   13. Acknowledgements ..............................................34
   14. Contributors ..................................................34
   15. Normative References ..........................................35
   16. Informative References ........................................35

Takeda                       Informational                      [Page 2]
Show full document text