The BGP Tunnel Encapsulation Attribute
draft-ietf-idr-tunnel-encaps-12
IDR Working Group K. Patel
Internet-Draft Arrcus, Inc
Obsoletes: 5512 (if approved) G. Van de Velde
Intended status: Standards Track Nokia
Expires: November 21, 2019 S. Sangli
Juniper Networks, Inc
E. Rosen
May 20, 2019
The BGP Tunnel Encapsulation Attribute
draft-ietf-idr-tunnel-encaps-12.txt
Abstract
RFC 5512 defines a BGP Path Attribute known as the "Tunnel
Encapsulation Attribute". This attribute allows one to specify a set
of tunnels. For each such tunnel, the attribute can provide the
information needed to create the tunnel and the corresponding
encapsulation header. The attribute can also provide information
that aids in choosing whether a particular packet is to be sent
through a particular tunnel. RFC 5512 states that the attribute is
only carried in BGP UPDATEs that have the "Encapsulation Subsequent
Address Family (Encapsulation SAFI)". This document deprecates the
Encapsulation SAFI (which has never been used in production), and
specifies semantics for the attribute when it is carried in UPDATEs
of certain other SAFIs. This document adds support for additional
tunnel types, and allows a remote tunnel endpoint address to be
specified for each tunnel. This document also provides support for
specifying fields of any inner or outer encapsulations that may be
used by a particular tunnel.
This document obsoletes RFC 5512.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
Patel, et al. Expires November 21, 2019 [Page 1]
Internet-Draft Tunnel Encapsulation Attribute May 2019
This Internet-Draft will expire on November 21, 2019.
Copyright Notice
Copyright (c) 2019 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
(https://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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Brief Summary of RFC 5512 . . . . . . . . . . . . . . . . 4
1.2. Deficiencies in RFC 5512 . . . . . . . . . . . . . . . . 4
1.3. Brief Summary of Changes from RFC 5512 . . . . . . . . . 5
1.4. Impact on RFC 5566 . . . . . . . . . . . . . . . . . . . 6
2. The Tunnel Encapsulation Attribute . . . . . . . . . . . . . 6
3. Tunnel Encapsulation Attribute Sub-TLVs . . . . . . . . . . . 8
3.1. The Remote Endpoint Sub-TLV . . . . . . . . . . . . . . . 8
3.2. Encapsulation Sub-TLVs for Particular Tunnel Types . . . 10
3.2.1. VXLAN . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.2. VXLAN-GPE . . . . . . . . . . . . . . . . . . . . . . 12
3.2.3. NVGRE . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2.4. L2TPv3 . . . . . . . . . . . . . . . . . . . . . . . 14
3.2.5. GRE . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.6. MPLS-in-GRE . . . . . . . . . . . . . . . . . . . . . 15
3.2.7. IP-in-IP . . . . . . . . . . . . . . . . . . . . . . 16
3.3. Outer Encapsulation Sub-TLVs . . . . . . . . . . . . . . 16
3.3.1. IPv4 DS Field . . . . . . . . . . . . . . . . . . . . 16
3.3.2. UDP Destination Port . . . . . . . . . . . . . . . . 17
3.4. Sub-TLVs for Aiding Tunnel Selection . . . . . . . . . . 17
3.4.1. Protocol Type Sub-TLV . . . . . . . . . . . . . . . . 17
3.4.2. Color Sub-TLV . . . . . . . . . . . . . . . . . . . . 17
Show full document text