IGP Extensions for Support of Slice Aggregate Aware Traffic Engineering
draft-bestbar-lsr-slice-aware-te-00

Document Type Active Internet-Draft (individual)
Authors William Britto  , Rejesh Shetty  , Colby Barth  , Bin Wen  , Shaofu Peng  , Ran Chen 
Last updated 2021-02-22
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LSR Working Group                                              W. Britto
Internet-Draft                                                 R. Shetty
Intended status: Standards Track                                C. Barth
Expires: August 26, 2021                                Juniper Networks
                                                                  B. Wen
                                                                 Comcast
                                                                 S. Peng
                                                                 R. Chen
                                                         ZTE Corporation
                                                       February 22, 2021

IGP Extensions for Support of Slice Aggregate Aware Traffic Engineering
                  draft-bestbar-lsr-slice-aware-te-00

Abstract

   A slice aggregate is a collection of packets that match a slice
   policy selection criteria and are given the same forwarding
   treatment.  Slice Aggregate aware Traffic Engineering (SA-TE) is a
   mechanism that facilitates Traffic Engineering (TE) path selection to
   take into account the available network resources associated with a
   specific slice aggregate.  This document specifies the Interior
   Gateway Protocol (IGP) extensions for support of SA-TE.  This
   includes the generalization of the semantics of a number of IGP
   extensions already defined for existing MPLS Traffic Engineering in
   [RFC3630], [RFC4124], [RFC5305] and additional IGP extensions beyond
   those.

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   This Internet-Draft will expire on August 26, 2021.

Britto, et al.           Expires August 26, 2021                [Page 1]
Internet-Draft             IGP Slice Aware TE              February 2021

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Resource Allocation . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Resource Sharing and Resource Overbooking . . . . . . . .   5
     4.2.  SA-TE Resource Allocation Model . . . . . . . . . . . . .   5
   5.  Next-hop Filtering Capability . . . . . . . . . . . . . . . .   5
   6.  IS-IS Extensions for SA-TE  . . . . . . . . . . . . . . . . .   7
     6.1.  Network Slicing GENINFO TLV . . . . . . . . . . . . . . .   7
     6.2.  Slice Aggregate Aware Traffic Engineering Capabilities
           APPsub-TLV  . . . . . . . . . . . . . . . . . . . . . . .   7
     6.3.  Slice Aggregate Aware Traffic Engineering Link APPsub-TLV   8
     6.4.  Slice Aggregate Aware Traffic Engineering Link Attributes
           Sub-sub-TLV . . . . . . . . . . . . . . . . . . . . . . .  10
       6.4.1.  Slice Aggregate Aware Traffic Engineering Unreserved
               Bandwidth Sub-sub-sub-TLV . . . . . . . . . . . . . .  10
       6.4.2.  Slice Aggregate Aware Traffic Engineering Residual
               Bandwidth Sub-sub-sub-TLV . . . . . . . . . . . . . .  11
       6.4.3.  Slice Aggregate Aware Traffic Engineering Available
               Bandwidth Sub-sub-sub-TLV . . . . . . . . . . . . . .  11
       6.4.4.  Slice Aggregate Aware Traffic Engineering Utilized
               Bandwidth Sub-sub-sub-TLV . . . . . . . . . . . . . .  12
   7.  OSPF Extensions for SA-TE . . . . . . . . . . . . . . . . . .  12
   8.  Functional Example of Unreserved-Bandwidth Advertisements . .  12
     8.1.  Formula to Compute the Unreserved Bandwidth . . . . . . .  12
     8.2.  Examples  . . . . . . . . . . . . . . . . . . . . . . . .  13
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