Network Assigned Upstream-Label
draft-ietf-teas-network-assigned-upstream-label-08

Document Type Active Internet-Draft (teas WG)
Last updated 2017-08-11
Replaces draft-ietf-ccamp-network-assigned-upstream-label
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication (wg milestone: Dec 2015 - Submit network assig... )
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TEAS Working Group                                         X. Zhang, Ed.
Internet-Draft                                       Huawei Technologies
Updates: 3473 (if approved)                               V. Beeram, Ed.
Intended status: Standards Track                        Juniper Networks
Expires: February 12, 2018                                    I. Bryskin
                                                     Huawei Technologies
                                                           D. Ceccarelli
                                                                Ericsson
                                                     O. Gonzalez de Dios
                                                              Telefonica
                                                         August 11, 2017

                    Network Assigned Upstream-Label
           draft-ietf-teas-network-assigned-upstream-label-08

Abstract

   This document discusses a Generalized Multi-Protocol Label Switching
   (GMPLS) Resource reSerVation Protocol with Traffic Engineering (RSVP-
   TE) mechanism that enables the network to assign an upstream label
   for a bidirectional Label Switched Path (LSP).  This is useful in
   scenarios where a given node does not have sufficient information to
   assign the correct upstream label on its own and needs to rely on the
   downstream node to pick an appropriate label.  This document updates
   RFC3473.

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
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   This Internet-Draft will expire on February 12, 2018.

Zhang, et al.           Expires February 12, 2018               [Page 1]
Internet-Draft       Network Assigned Upstream-Label         August 2017

Copyright Notice

   Copyright (c) 2017 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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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
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Unassigned Upstream Label . . . . . . . . . . . . . . . . . .   3
     2.1.  Processing Rules  . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Backwards Compatibility . . . . . . . . . . . . . . . . .   4
   3.  Use-Case: Wavelength Setup for IP over Optical Networks . . .   4
     3.1.  Initial Setup . . . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Wavelength Change . . . . . . . . . . . . . . . . . . . .   6
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   The Generalized Multi-Protocol Label Switching (GMPLS) Resource
   reSerVation Protocol with Traffic Engineering (RSVP-TE) extensions
   for setting up a bidirectional Label Switched Path (LSP) are
   specified in [RFC3473].  The bidirectional LSP setup is indicated by
   the presence of an UPSTREAM_LABEL Object in the PATH message.  As per
   the existing setup procedure outlined for a bidirectional LSP, each
   upstream node must allocate a valid upstream label on the outgoing
   interface before sending the initial PATH message downstream.
   However, there are certain scenarios where it is not desirable or
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