BGP Extensions to Support Packet Network Slicing in SR Policy
draft-liu-idr-bgp-network-slicing-01
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Liu Yao
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Shaofu Peng
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2020-10-15
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IDR Group Yao. Liu
Internet-Draft Shaofu. Peng
Intended status: Standards Track ZTE Corporation
Expires: April 18, 2021 October 15, 2020
BGP Extensions to Support Packet Network Slicing in SR Policy
draft-liu-idr-bgp-network-slicing-01
Abstract
[I-D.peng-teas-network-slicing] defines a unified TN-slice
identifier, AII(administrative instance identifier), to indicate the
topology, computing, storage resources of the dedicated virtual
network for both intra-domain and inter-domain network slicing
scenarios. This document defines extensions to BGP in order to
advertise AII in SR policies.
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 April 18, 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
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
Liu & Peng Expires April 18, 2021 [Page 1]
Internet-Draft BGP for NS in SR Policy October 2020
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. SR policy with AII . . . . . . . . . . . . . . . . . . . . . 2
3. Operations . . . . . . . . . . . . . . . . . . . . . . . . . 3
4. Security Considerations . . . . . . . . . . . . . . . . . . . 3
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.1. Normative References . . . . . . . . . . . . . . . . . . 4
6.2. Informative References . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4
1. Introduction
For a packet network, network slicing requires the underlying network
to support partitioning of the network resources to provide the
client with dedicated (private) networking, computing, and storage
resources drawn from a shared pool.
[I-D.peng-teas-network-slicing] defines a unified TN-slice
identifier, AII(administrative instance identifier), to indicate the
topology, computing, storage resources of the dedicated virtual
network for both intra-domain and inter-domain network slicing
scenarios, and how to compute SR-BE or SR-TE path according to TN-
slice Identifier combined with other creteria.
[I-D.ietf-spring-segment-routing-policy] details the concepts of SR
Policy and steering into an SR
Policy.[I-D.ietf-idr-segment-routing-te-policy] specifies the way to
use BGP to distribute one or more of the candidate paths of an SR
Policy to the headend of that policy.
This document defines extensions to BGP in order to advertise AII in
SR-TE policies.
2. SR policy with AII
To distinguish forwarding behavior of different virtual networks,
each segment lists in SR policy need to be computed within the scope
of TN-slice identified by AII. As AII has global significance, all
segments of the same segment list can share a single AII. This
document defines a new AII sub-TLV in Segment List Sub-TLV to
indicate which slice this segment list belongs to,
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