Keyed IPv6 Tunnel
RFC 8159
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RFC - Proposed Standard
(May 2017; No errata)
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Last updated |
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2017-05-05
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Replaces |
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draft-mkonstan-l2tpext-keyed-ipv6-tunnel
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Stream |
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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WG Document
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Document shepherd |
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Carlos Pignataro
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Shepherd write-up |
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Show
(last changed 2015-07-01)
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| IESG |
IESG state |
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RFC 8159 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Deborah Brungard
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Send notices to |
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draft-ietf-l2tpext-keyed-ipv6-tunnel.all@ietf.org
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| IANA |
IANA review state |
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IANA OK - No Actions Needed
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IANA action state |
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No IC
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Internet Engineering Task Force (IETF) M. Konstantynowicz, Ed.
Request for Comments: 8159 G. Heron, Ed.
Category: Standards Track Cisco Systems
ISSN: 2070-1721 R. Schatzmayr
Deutsche Telekom AG
W. Henderickx
Alcatel-Lucent, Inc.
May 2017
Keyed IPv6 Tunnel
Abstract
This document describes a tunnel encapsulation for Ethernet over IPv6
with a mandatory 64-bit cookie for connecting Layer 2 (L2) Ethernet
attachment circuits identified by IPv6 addresses. The encapsulation
is based on the Layer 2 Tunneling Protocol Version 3 (L2TPv3) over IP
and does not use the L2TPv3 control plane.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc8159.
Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Konstantynowicz, et al. Standards Track [Page 1]
RFC 8159 Keyed IPv6 Tunnel May 2017
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. Static 1:1 Mapping without a Control Plane . . . . . . . . . 3
3. 64-Bit Cookie . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Encapsulation . . . . . . . . . . . . . . . . . . . . . . . . 4
5. Fragmentation and Reassembly . . . . . . . . . . . . . . . . 7
6. OAM Considerations . . . . . . . . . . . . . . . . . . . . . 7
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
8. Security Considerations . . . . . . . . . . . . . . . . . . . 8
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
9.1. Normative References . . . . . . . . . . . . . . . . . . 9
9.2. Informative References . . . . . . . . . . . . . . . . . 10
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 11
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
1. Introduction
L2TPv3, as defined in [RFC3931], provides a mechanism for tunneling
Layer 2 (L2) "circuits" across a packet-oriented data network (e.g.,
over IP), with multiple attachment circuits multiplexed over a single
pair of IP address endpoints (i.e., a tunnel) using the L2TPv3
Session ID as a circuit discriminator.
Implementing L2TPv3 over IPv6 [RFC2460] provides the opportunity to
utilize unique IPv6 addresses to identify Ethernet attachment
circuits directly, leveraging the key property that IPv6 offers -- a
vast number of unique IP addresses. In this case, processing of the
L2TPv3 Session ID may be bypassed upon receipt, as each tunnel has
one and only one associated session. This local optimization does
not hinder the ability to continue supporting the multiplexing of
circuits via the Session ID on the same router for other L2TPv3
tunnels.
There are various advantages to this approach when compared to the
"traditional" L2TPv3 approach of using a loopback address to
terminate the tunnel and then carrying multiple sessions over the
tunnel. These include better ECMP load balancing (since each tunnel
has a unique source/destination IPv6 address pair) and finer-grained
control when advertising tunnel endpoints using a routing protocol.
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