IGP Flexible Algorithm with L2bundles
draft-peng-lsr-flex-algo-l2bundles-04

Document Type Active Internet-Draft (individual)
Authors Shaofu Peng  , Ran Chen  , Greg Mirsky 
Last updated 2020-10-14
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)
L                                                              P. Shaofu
Internet-Draft                                                    C. Ran
Intended status: Standards Track                         ZTE Corporation
Expires: April 18, 2021                                        G. Mirsky
                                                               ZTE Corp.
                                                        October 15, 2020

                 IGP Flexible Algorithm with L2bundles
                 draft-peng-lsr-flex-algo-l2bundles-04

Abstract

   IGP Flex Algorithm proposes a solution that allows IGPs themselves to
   compute constraint based paths over the network, and it also
   specifies a way of using Segment Routing (SR) Prefix-SIDs and SRv6
   locators to steer packets along the constraint-based paths.  This
   document describes how to create Flex-algo plane with L2bundles
   scenario.

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

Shaofu, et al.           Expires April 18, 2021                 [Page 1]
Internet-Draft            l2bundles te-affinity             October 2020

   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.  Color set on L2 Bundle Member . . . . . . . . . . . . . . . .   3
   4.  Flex-algo plane with L2 link resource . . . . . . . . . . . .   3
     4.1.  Best-effort . . . . . . . . . . . . . . . . . . . . . . .   3
     4.2.  Traffic Engineering . . . . . . . . . . . . . . . . . . .   4
   5.  Flex-algo L2bundles Use-cases . . . . . . . . . . . . . . . .   5
     5.1.  Flex-algo L2bundles Examples  . . . . . . . . . . . . . .   5
   6.  IGP L2 Bundle Member Extensions . . . . . . . . . . . . . . .   6
     6.1.  ISIS L2 Bundle Member EAG advertisement . . . . . . . . .   6
     6.2.  OSPF L2 Bundle Member EAG advertisement . . . . . . . . .   6
     6.3.  FAD Flags Extensions  . . . . . . . . . . . . . . . . . .   6
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   10. Normative References  . . . . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   IGP Flex Algorithm [I-D.ietf-lsr-flex-algo] proposes a solution that
   allows IGPs themselves to compute constraint based paths over the
   network, and it also specifies a way of using Segment Routing
   [RFC8402] Prefix-SIDs and SRv6 locators to steer packets along the
   constraint-based paths.  It specifies a set of extensions to ISIS,
   OSPFv2 and OSPFv3 that enable a router to send TLVs that identify (a)
   calculation-type, (b) specify a metric-type, and (c )describe a set
   of constraints on the topology, that are to be used to compute the
   best paths along the constrained topology.  A given combination of
   calculation-type, metric-type, and constraints is known as an FAD
   (Flexible Algorithm Definition).

   [RFC8668] and [I-D.ketant-lsr-ospf-l2bundles] introduces the ability
   for IS-IS and OSPF respectively to advertise the link attributes of
   Layer 2 (L2) Bundle Members.  Especially, the link attribute
   "Administrative Group" and "Extended Administrative Group" could be
   individual to each L2 Bundle Member for purpose of Flex-algo plane
   construction, where multiple Flex-algo planes share the same Layer 3
   parent interface and each Flex-algo plane has dedicated L2 Bundle
   Member.
Show full document text