Technical Summary
This informational document presents an analysis of some of the
scaling concerns for the number of Label Switching Paths (LSPs) in
MPLS-TE core networks, and examines the value of two techniques
(LSP hierarchies, and multipoint-to-point LSPs) for improving
scaling. The intention is to motivate the development of
appropriate deployment techniques and protocol extensions to
enable the application of MPLS-TE in large networks.
This document only considers the question of achieving scalability
for the support of point-to-point MPLS-TE LSPs. Point-to-multipoint
MPLS-TE LSPs are for future study.
Working Group Summary
No controversy reported (see PROTO writeup by Loa Andersson in the
ID Tracker). Several WG participants expressed an interest in
knowing how the scaling properties are affected by fast reroute,
and how P2MP MPLS-TE scales. It was agreed that these issues
constitute more advanced questions and should be addressed in
separate drafts.
Document Quality
As an analysis of scaling properties, this document does not
specify anything that could or would be implemented. This document
was reviewed by the MPLS and CCAMP WGs, and underwent IETF last
call without any controversy nor complaints. It has been updated
based on Gen-Art comments. The algorithms developed in this
document have been applied to understand MPLS-TE and PBB-TE
deployments by several vendors.
Personnel
Loa Andersson is the Document Shepherd for this document. Ross
Callon is the Responsible Area Director.