The IPv6 Compressed Routing
Header (CRH)
draft-bonica-6man-comp-rtg-hdr-09
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2019-11-20
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6man R. Bonica
Internet-Draft Juniper Networks
Intended status: Standards Track Y. Kamite
Expires: May 23, 2020 NTT Communications Corporation
T. Niwa
KDDI
A. Alston
D. Henriques
Liquid Telecom
L. Jalil
Verizon
N. So
F. Xu
Reliance Jio
G. Chen
Baidu
Y. Zhu
China Telecom
Y. Zhou
ByteDance
November 20, 2019
The IPv6 Compressed Routing Header (CRH)
draft-bonica-6man-comp-rtg-hdr-09
Abstract
This document defines two new IPv6 Routing header types.
Generically, they are called the Compressed Routing Header (CRH).
More specifically, the 16-bit version of the CRH is called the CRH-
16, while the 32-bit version of the CRH is called the CRH-32. SRm6
nodes use the CRH to steer packets from segment to segment along SRm6
paths.
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
Bonica, et al. Expires May 23, 2020 [Page 1]
Internet-Draft IPv6 Compressed Routing Header November 2019
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on May 23, 2020.
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
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. The Compressed Routing Header (CRH) . . . . . . . . . . . . . 3
4. The Segment Forwarding Information Base (SFIB) . . . . . . . 5
5. Processing Rules . . . . . . . . . . . . . . . . . . . . . . 5
5.1. General . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.2. CRH Specific . . . . . . . . . . . . . . . . . . . . . . 6
5.2.1. Computing Minimum CRH Length . . . . . . . . . . . . 7
5.2.2. Topological Instructions That Control Adjacency
Segments . . . . . . . . . . . . . . . . . . . . . . 8
5.2.3. Topological Instructions That Control Node Segments . 9
5.2.4. Topological Instructions That Control Binding
Segments . . . . . . . . . . . . . . . . . . . . . . 9
6. Mutability . . . . . . . . . . . . . . . . . . . . . . . . . 10
7. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . 10
8. Management Considerations . . . . . . . . . . . . . . . . . . 10
9. ICMPv6 Considerations . . . . . . . . . . . . . . . . . . . . 10
10. Security Considerations . . . . . . . . . . . . . . . . . . . 10
11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 11
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