The Per-Segment Service Instruction (PSSI) Option
draft-bonica-6man-seg-end-opt-07
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6man R. Bonica
Internet-Draft Juniper Networks
Intended status: Standards Track J. Halpern
Expires: September 7, 2020 Ericsson
Y. Kamite
NTT Communications Corporation
T. Niwa
KDDI
L. Jalil
Verizon
G. Chen
Baidu
Y. Zhu
China Telecom
Y. Zhou
ByteDance
March 6, 2020
The Per-Segment Service Instruction (PSSI) Option
draft-bonica-6man-seg-end-opt-07
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
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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 September 7, 2020.
Bonica, et al. Expires September 7, 2020 [Page 1]
Internet-Draft Per-Seg Service Instruction Opt March 2020
Copyright Notice
Copyright (c) 2020 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
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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 September 7, 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
alternative to the Network Service Header (NSH) [RFC8300].
SRm6 encodes PSSIs in a new IPv6 option, called the PSSI Option.
This document describes the PSSI Option.
2. Requirements Language
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