Network Programming extension: SRv6 uSID instruction
draft-filsfils-spring-net-pgm-extension-srv6-usid-07
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SPRING C. Filsfils, Ed.
Internet-Draft P. Camarillo, Ed.
Intended status: Standards Track Cisco Systems, Inc.
Expires: November 20, 2020 D. Cai
Alibaba
D. Voyer
Bell Canada
I. Meilik
Broadcom
K. Patel
Arrcus, Inc.
W. Henderickx
Nokia
P. Jonnalagadda
Barefoot Networks
D. Melman
Marvell
Y. Liu
China Mobile
J. Guichard
Futurewei
May 19, 2020
Network Programming extension: SRv6 uSID instruction
draft-filsfils-spring-net-pgm-extension-srv6-usid-07
Abstract
The SRv6 "micro segment" (SRv6 uSID or uSID for short) instruction is
a straightforward extension of the SRv6 Network Programming model:
o The SRv6 Control Plane is leveraged without any change
o The SRH dataplane encapsulation is leveraged without any change
o Any SID in the SID list can carry micro segments
o Based on the Compressed SRv6 Segment List Encoding in SRH
[I-D.filsfilscheng-spring-srv6-srh-comp-sl-enc] framework
This enables:
o ultra-scale (e.g. multi-domain 5G deployments)
o minimum MTU overhead
o installed-base reuse
Filsfils, et al. Expires November 20, 2020 [Page 1]
Internet-Draft NET-PGM: SRv6 uSID instruction May 2020
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
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 November 20, 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
carefully, as they describe your rights and restrictions with respect
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. uSID Allocation within a uSID Block . . . . . . . . . . . . . 6
3.1. GIB, LIB, global uSID and local uSID . . . . . . . . . . 6
3.1.1. Global uSID . . . . . . . . . . . . . . . . . . . . . 6
3.1.2. Local uSID . . . . . . . . . . . . . . . . . . . . . 6
Filsfils, et al. Expires November 20, 2020 [Page 2]
Internet-Draft NET-PGM: SRv6 uSID instruction May 2020
3.1.3. Reference Illustration . . . . . . . . . . . . . . . 6
4. SRv6 behaviors associated with a uSID . . . . . . . . . . . . 8
4.1. uSID behaviors related to the IGP . . . . . . . . . . . . 8
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