Constraint-Based LSP Setup using LDP
RFC 3212
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RFC - Proposed Standard
(January 2002; No errata)
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2013-03-02
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IETF
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RFC 3212 (Proposed Standard)
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Network Working Group B. Jamoussi, Editor, Nortel Networks
Request for Comments: 3212 L. Andersson, Utfors AB
Category: Standards Track R. Callon, Juniper Networks
R. Dantu, Netrake Corporation
L. Wu, Cisco Systems
P. Doolan, OTB Consulting Corp.
T. Worster
N. Feldman, IBM Corp.
A. Fredette, ANF Consulting
M. Girish, Atoga Systems
E. Gray, Sandburst
J. Heinanen, Song Networks, Inc.
T. Kilty, Newbridge Networks, Inc.
A. Malis, Vivace Networks
January 2002
Constraint-Based LSP Setup using LDP
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2002). All Rights Reserved.
Abstract
This document specifies mechanisms and TLVs (Type/Length/Value) for
support of CR-LSPs (constraint-based routed Label Switched Path)
using LDP (Label Distribution Protocol).
This specification proposes an end-to-end setup mechanism of a CR-LSP
initiated by the ingress LSR (Label Switching Router). We also
specify mechanisms to provide means for reservation of resources
using LDP.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [6].
Jamoussi, et al. Standards Track [Page 1]
RFC 3212 Constraint-Based LSP Setup using LDP January 2002
Table of Contents
1. Introduction....................................................3
2. Constraint-based Routing Overview...............................4
2.1 Strict and Loose Explicit Routes...............................5
2.2 Traffic Characteristics........................................5
2.3 Preemption.....................................................5
2.4 Route Pinning..................................................6
2.5 Resource Class.................................................6
3. Solution Overview...............................................6
3.1 Required Messages and TLVs.....................................7
3.2 Label Request Message..........................................7
3.3 Label Mapping Message..........................................9
3.4 Notification Message..........................................10
3.5 Release , Withdraw, and Abort Messages........................11
4. Protocol Specification.........................................11
4.1 Explicit Route TLV (ER-TLV)...................................11
4.2 Explicit Route Hop TLV (ER-Hop TLV)...........................12
4.3 Traffic Parameters TLV........................................13
4.3.1 Semantics...................................................15
4.3.1.1 Frequency.................................................15
4.3.1.2 Peak Rate.................................................16
4.3.1.3 Committed Rate............................................16
4.3.1.4 Excess Burst Size.........................................16
4.3.1.5 Peak Rate Token Bucket....................................16
4.3.1.6 Committed Data Rate Token Bucket..........................17
4.3.1.7 Weight....................................................18
4.3.2 Procedures..................................................18
4.3.2.1 Label Request Message.....................................18
4.3.2.2 Label Mapping Message.....................................18
4.3.2.3 Notification Message......................................19
4.4 Preemption TLV................................................19
4.5 LSPID TLV.....................................................20
4.6 Resource Class (Color) TLV....................................21
4.7 ER-Hop semantics..............................................22
4.7.1. ER-Hop 1: The IPv4 prefix..................................22
4.7.2. ER-Hop 2: The IPv6 address.................................23
4.7.3. ER-Hop 3: The autonomous system number....................24
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