RFC 3212 (rfc3212) - Page 2 of 42

Constraint-Based LSP Setup using LDP

Alternative Format: Original Text Document


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
   4.7.4. ER-Hop 4: LSPID............................................24
   4.8. Processing of the Explicit Route TLV.........................26
   4.8.1. Selection of the next hop..................................26
   4.8.2. Adding ER-Hops to the explicit route TLV...................27
   4.9 Route Pinning TLV.............................................28
   4.10 CR-LSP FEC Element...........................................28
   5. IANA Considerations............................................29
   5.1 TLV Type Name Space...........................................29
   5.2 FEC Type Name Space...........................................30
   5.3 Status Code Space.............................................30



Jamoussi, et al.            Standards Track

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