Distribution of Traffic Engineering (TE) Policies and State using BGP-LS
draft-ietf-idr-te-lsp-distribution-14
Network Working Group S. Previdi
Internet-Draft
Intended status: Standards Track K. Talaulikar, Ed.
Expires: April 26, 2021 Cisco Systems, Inc.
J. Dong, Ed.
M. Chen
Huawei Technologies
H. Gredler
RtBrick Inc.
J. Tantsura
Apstra
October 23, 2020
Distribution of Traffic Engineering (TE) Policies and State using BGP-LS
draft-ietf-idr-te-lsp-distribution-14
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.
Status of This Memo
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This Internet-Draft will expire on April 26, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Previdi, et al. Expires April 26, 2021 [Page 1]
Internet-Draft TE Policy State Distribution using BGP-LS October 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 5
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
6.6. SR Segment . . . . . . . . . . . . . . . . . . . . . . . 31
6.6.1. Segment Descriptors . . . . . . . . . . . . . . . . . 32
6.7. SR Segment List Metric . . . . . . . . . . . . . . . . . 39
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