Scalable Network Slicing over SR Networks
draft-bestbar-spring-scalable-ns-00

Document Type Active Internet-Draft (individual)
Authors Tarek Saad  , Vishnu Beeram 
Last updated 2020-12-16
Stream (None)
Intended RFC status (None)
Formats plain text pdf htmlized (tools) htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
SPRING Working Group                                             T. Saad
Internet-Draft                                                 V. Beeram
Intended status: Standards Track                        Juniper Networks
Expires: June 19, 2021                                 December 16, 2020

               Scalable Network Slicing over SR Networks
                  draft-bestbar-spring-scalable-ns-00

Abstract

   Multiple network slices can be realized on top of a single shared
   network.  A router that requires forwarding of a packet that belongs
   to a network slice may have to decide on the forwarding action to
   take based on selected next-hop(s), and the forwarding treatment
   (e.g. scheduling and drop policy) to enforce based on the slice
   aggregate per-hop behavior.  Segment Routing is a technology that
   enables the steering of packets in a network by encoding pre-
   established segments within the network into the packet header.  This
   document introduces mechanisms to enable forwarding of packets over a
   specific network slice along a Segment Routing (SR) path.

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 June 19, 2021.

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

Saad & Beeram             Expires June 19, 2021                 [Page 1]
Internet-Draft       Scalable Network Slices over SR       December 2020

   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
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Forwarding over SR Network Slices . . . . . . . . . . . . . .   3
     2.1.  Path Selection  . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Network Slice Selection . . . . . . . . . . . . . . . . .   4
       2.2.1.  Segment Range as Slice Selector . . . . . . . . . . .   4
       2.2.2.  Global Identifier as Slice Selector . . . . . . . . .   6
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   5.  Acknowledgement . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   9
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   Network slicing allows a service provider, or a network operator to
   create independent and isolated logical networks on top of a common
   or shared physical network infrastructure.

   When logical network slices are realized on top of a shared physical
   network, it is important to forward traffic using only the specific
   resource(s) allocated for the network slice.  Packets that traverse a
   network slice MAY be identified by specific field(s) carried within
   the packet.

   Segment Routing (SR) [RFC8402] specifies a mechanism to steer packets
   through a network by carrying an ordered list of segments.  A segment
   is referred to by its Segment Identifier (SID).

   This document introduces two approaches applicable to SR networks
   that enable forwarding of packet(s) that belong to a network slice
   over a SR Path.

   The first approach extends the SR paradigm by defining a new SID type
   (slice SID) that, in addition to defining the forwarding action
   (next-hop selection), associates a SID to the network slice and
   allows enforcing the specified forwarding treatment.

Saad & Beeram             Expires June 19, 2021                 [Page 2]
Internet-Draft       Scalable Network Slices over SR       December 2020

   The second approach relies on a separate field carried in the packet
Show full document text