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