RFC 2702 (rfc2702) - Page 2 of 29
Requirements for Traffic Engineering Over MPLS
Alternative Format: Original Text Document
RFC 2702 MPLS Traffic Engineering September 1999
5.4 Basic Attributes of Traffic Trunks ....................... 13
5.5 Traffic Parameter Attributes ............................ 14
5.6 Generic Path Selection and Management Attributes ......... 14
5.6.1 Administratively Specified Explicit Paths ................ 15
5.6.2 Hierarchy of Preference Rules for Multi-paths ............ 15
5.6.3 Resource Class Affinity Attributes ....................... 16
5.6.4 Adaptivity Attribute ..................................... 17
5.6.5 Load Distribution Across Parallel Traffic Trunks ......... 18
5.7 Priority Attribute ....................................... 18
5.8 Preemption Attribute ..................................... 18
5.9 Resilience Attribute ..................................... 19
5.10 Policing Attribute ...................................... 20
6.0 Resource Attributes ...................................... 21
6.1 Maximum Allocation Multiplier ............................ 21
6.2 Resource Class Attribute ................................ 22
7.0 Constraint-Based Routing ................................ 22
7.1 Basic Features of Constraint-Based Routing ............... 23
7.2 Implementation Considerations ............................ 24
8.0 Conclusion ............................................. 25
9.0 Security Considerations .................................. 26
10.0 References ............................................. 26
11.0 Acknowledgments .......................................... 27
12.0 Authors' Addresses ....................................... 28
13.0 Full Copyright Statement ................................. 29
1.0 Introduction
Multiprotocol Label Switching (MPLS) [1,2] integrates a label
swapping framework with network layer routing. The basic idea
involves assigning short fixed length labels to packets at the
ingress to an MPLS cloud (based on the concept of forwarding
equivalence classes [1,2]). Throughout the interior of the MPLS
domain, the labels attached to packets are used to make forwarding
decisions (usually without recourse to the original packet headers).
A set of powerful constructs to address many critical issues in the
emerging differentiated services Internet can be devised from this
relatively simple paradigm. One of the most significant initial
applications of MPLS will be in Traffic Engineering. The importance
of this application is already well-recognized (see [1,2,3]).
This manuscript is exclusively focused on the Traffic Engineering
applications of MPLS. Specifically, the goal of this document is to
highlight the issues and requirements for Traffic Engineering in a
large Internet backbone. The expectation is that the MPLS
specifications, or implementations derived therefrom, will address
Awduche, et al. Informational