The Per-Segment Service
Instruction (PSSI) Option
draft-bonica-6man-seg-end-opt-06
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2019-11-20
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6man R. Bonica
Internet-Draft Juniper Networks
Intended status: Standards Track J. Halpern
Expires: May 23, 2020 Ericsson
Y. Kamite
NTT Communications Corporation
T. Niwa
KDDI
L. Jalil
Verizon
N. So
F. Xu
Reliance Jio
G. Chen
Baidu
Y. Zhu
China Telecom
Y. Zhou
ByteDance
November 20, 2019
The Per-Segment Service Instruction (PSSI) Option
draft-bonica-6man-seg-end-opt-06
Abstract
SRm6 encodes Per-Segment Service Instructions (PSSI) in a new IPv6
option, called the PSSI Option. This document describes the PSSI
Option.
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."
This Internet-Draft will expire on May 23, 2020.
Bonica, et al. Expires May 23, 2020 [Page 1]
Internet-Draft Per-Seg Service Instruction Opt November 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 . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. PSSI Identifiers . . . . . . . . . . . . . . . . . . . . . . 3
4. Option Format . . . . . . . . . . . . . . . . . . . . . . . . 3
5. Security Considerations . . . . . . . . . . . . . . . . . . . 4
6. ICMPv6 Considerations . . . . . . . . . . . . . . . . . . . . 4
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4
9. Normative References . . . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
An SRm6 [I-D.bonica-spring-srv6-plus] path provides unidirectional
connectivity from its ingress node to its egress node. While an SRm6
path can follow the least cost path from ingress to egress, it can
also follow any other path.
An SRm6 path contains one or more segments. A segment provides
unidirectional connectivity from its ingress node to its egress node.
SRm6 paths are programmable. They support several instruction types,
including Per-Segment Service Instructions (PSSI). The following are
examples of PSSIs:
o Expose a packet to a firewall policy.
o Expose a packet to a sampling policy.
Bonica, et al. Expires May 23, 2020 [Page 2]
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PSSIs are executed at segment egress nodes and can be used to
implement limited service chains. However, they do not provide an
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