Asynchronous Transfer Mode (ATM) over Layer 2 Tunneling Protocol Version 3 (L2TPv3)
RFC 4454
| Document | Type |
RFC - Proposed Standard
(May 2006; No errata)
Updated by RFC 5641
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 4454 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Margaret Cullen | ||
| Send notices to | rdasilva@va.rr.com | ||
Network Working Group S. Singh
Request for Comments: 4454 M. Townsley
Category: Standards Track C. Pignataro
Cisco Systems
May 2006
Asynchronous Transfer Mode (ATM) over
Layer 2 Tunneling Protocol Version 3 (L2TPv3)
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2006).
Abstract
The Layer 2 Tunneling Protocol, Version 3 (L2TPv3) defines an
extensible tunneling protocol to transport layer 2 services over IP
networks. This document describes the specifics of how to use the
L2TP control plane for Asynchronous Transfer Mode (ATM) Pseudowires
and provides guidelines for transporting various ATM services over an
IP network.
Table of Contents
1. Introduction ....................................................2
1.1. Abbreviations ..............................................3
1.2. Specification of Requirements ..............................3
2. Control Connection Establishment ................................3
3. Session Establishment and ATM Circuit Status Notification .......4
3.1. L2TPv3 Session Establishment ...............................4
3.2. L2TPv3 Session Teardown ....................................6
3.3. L2TPv3 Session Maintenance .................................6
4. Encapsulation ...................................................6
4.1. ATM-Specific Sublayer ......................................7
4.2. Sequencing .................................................9
5. ATM Transport ...................................................9
5.1. ATM AAL5-SDU Mode .........................................10
5.2. ATM Cell Mode .............................................10
Singh, et al. Standards Track [Page 1]
RFC 4454 ATM over L2TPv3 May 2006
5.2.1. ATM VCC Cell Relay Service .........................11
5.2.2. ATM VPC Cell Relay Service .........................12
5.2.3. ATM Port Cell Relay Service ........................12
5.3. OAM Cell Support ..........................................12
5.3.1. VCC Switching ......................................12
5.3.2. VPC Switching ......................................13
6. ATM Maximum Concatenated Cells AVP .............................13
7. OAM Emulation Required AVP .....................................14
8. ATM Defects Mapping and Status Notification ....................14
8.1. ATM Alarm Status AVP ......................................14
9. Applicability Statement ........................................15
9.1. ATM AAL5-SDU Mode .........................................16
9.2. ATM Cell Relay Mode .......................................18
10. Congestion Control ............................................20
11. Security Considerations .......................................21
12. IANA Considerations ...........................................21
12.1. L2-Specific Sublayer Type ................................21
12.2. Control Message Attribute Value Pairs (AVPs) .............21
12.3. Result Code AVP Values ...................................22
12.4. ATM Alarm Status AVP Values ..............................22
12.5. ATM-Specific Sublayer Bits ...............................23
13. Acknowledgements ..............................................23
14. References ....................................................23
14.1. Normative References .....................................23
14.2. Informative References ...................................24
1. Introduction
This document describes the specifics of how to use the Layer 2
Tunneling Protocol (L2TP) for Asynchronous Transfer Mode (ATM)
Pseudowires, including encapsulation, carrying various ATM services,
such as AAL5 SDU, ATM VCC/VPC/Port cell relay over L2TP, and mapping
ATM defects to L2TP Set-Link-Info (SLI) messages to notify the peer
L2TP Control Connection Endpoint (LCCE).
Any ATM-specific AVPs or other L2TP constructs for ATM Pseudowire
(ATMPW) support are defined here as well. Support for ATM Switched
Virtual Path/Connection (SVP/SVC) and Soft Permanent Virtual
Path/Connection (SPVP/SPVC) are outside the scope of this document.
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