IGP Flexible Algorithm with L2bundles
draft-peng-lsr-flex-algo-l2bundles-00

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L                                                              P. Shaofu
Internet-Draft                                                    C. Ran
Intended status: Standards Track                         ZTE Corporation
Expires: July 2, 2020                                          G. Mirsky
                                                               ZTE Corp.
                                                       December 30, 2019

                 IGP Flexible Algorithm with L2bundles
                 draft-peng-lsr-flex-algo-l2bundles-00

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
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   This Internet-Draft will expire on July 2, 2020.

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   Copyright (c) 2019 IETF Trust and the persons identified as the
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   include Simplified BSD License text as described in Section 4.e of
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   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.  IGP L2 Bundle Member EAG Extensions . . . . . . . . . . . . .   4
     5.1.  ISIS L2 Bundle Member EAG Extension . . . . . . . . . . .   4
     5.2.  OSPF L2 Bundle Member EAG Extension . . . . . . . . . . .   5
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  ISIS IANA Considerations  . . . . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

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 (SR)
   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.

   This document describes how to create Flex-algo plane with L2bundles
   scenario.

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