Distribution of Traffic Engineering (TE) Policies and State using BGP-LS
draft-ietf-idr-te-lsp-distribution-12
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Network Working Group S. Previdi
Internet-Draft
Intended status: Standards Track K. Talaulikar, Ed.
Expires: April 16, 2020 Cisco Systems, Inc.
J. Dong, Ed.
M. Chen
Huawei Technologies
H. Gredler
RtBrick Inc.
J. Tantsura
Apstra
October 14, 2019
Distribution of Traffic Engineering (TE) Policies and State using BGP-LS
draft-ietf-idr-te-lsp-distribution-12
Abstract
This document describes a mechanism to collect the Traffic
Engineering and Policy information that is locally available in a
node and advertise it into BGP Link State (BGP-LS) updates. Such
information can be used by external components for path computation,
re-optimization, service placement, network visualization, etc.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
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."
Previdi, et al. Expires April 16, 2020 [Page 1]
Internet-Draft TE Policy State Distribution using BGP-LS October 2019
This Internet-Draft will expire on April 16, 2020.
Copyright Notice
Copyright (c) 2019 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
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Carrying TE Policy Information in BGP . . . . . . . . . . . . 5
3. TE Policy NLRI . . . . . . . . . . . . . . . . . . . . . . . 6
4. TE Policy Descriptors . . . . . . . . . . . . . . . . . . . . 7
4.1. Tunnel Identifier (Tunnel ID) . . . . . . . . . . . . . . 8
4.2. LSP Identifier (LSP ID) . . . . . . . . . . . . . . . . . 8
4.3. IPv4/IPv6 Tunnel Head-End Address . . . . . . . . . . . . 9
4.4. IPv4/IPv6 Tunnel Tail-End Address . . . . . . . . . . . . 9
4.5. SR Policy Candidate Path Descriptor . . . . . . . . . . . 10
4.6. Local MPLS Cross Connect . . . . . . . . . . . . . . . . 11
4.6.1. MPLS Cross Connect Interface . . . . . . . . . . . . 13
4.6.2. MPLS Cross Connect FEC . . . . . . . . . . . . . . . 14
5. MPLS-TE Policy State TLV . . . . . . . . . . . . . . . . . . 15
5.1. RSVP Objects . . . . . . . . . . . . . . . . . . . . . . 16
5.2. PCEP Objects . . . . . . . . . . . . . . . . . . . . . . 17
6. SR Policy State TLVs . . . . . . . . . . . . . . . . . . . . 18
6.1. SR Binding SID . . . . . . . . . . . . . . . . . . . . . 18
6.2. SR Candidate Path State . . . . . . . . . . . . . . . . . 20
6.3. SR Candidate Path Name . . . . . . . . . . . . . . . . . 22
6.4. SR Candidate Path Constraints . . . . . . . . . . . . . . 22
6.4.1. SR Affinity Constraint . . . . . . . . . . . . . . . 24
6.4.2. SR SRLG Constraint . . . . . . . . . . . . . . . . . 25
6.4.3. SR Bandwidth Constraint . . . . . . . . . . . . . . . 26
6.4.4. SR Disjoint Group Constraint . . . . . . . . . . . . 26
6.5. SR Segment List . . . . . . . . . . . . . . . . . . . . . 28
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