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RFC 4206
Title: Label Switched Paths (LSP) Hierarchy with
Generalized Multi-Protocol Label Switching (GMPLS)
Traffic Engineering (TE)
Author(s): K. Kompella, Y. Rekhter
Status: Standards Track
Date: October 2005
Mailbox: kireeti@juniper.net, yakov@juniper.net
Pages: 14
Characters: 31965
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-mpls-lsp-hierarchy-08.txt
URL: ftp://ftp.rfc-editor.org/in-notes/rfc4206.txt
To improve scalability of Generalized Multi-Protocol Label Switching
(GMPLS) it may be useful to aggregate Label Switched Paths (LSPs) by
creating a hierarchy of such LSPs. A way to create such a hierarchy
is by (a) a Label Switching Router (LSR) creating a Traffic
Engineering Label Switched Path (TE LSP), (b) the LSR forming a
forwarding adjacency (FA) out of that LSP (by advertising this LSP as
a Traffic Engineering (TE) link into the same instance of ISIS/OSPF
as the one that was used to create the LSP), (c) allowing other LSRs
to use FAs for their path computation, and (d) nesting of LSPs
originated by other LSRs into that LSP (by using the label stack
construct).
This document describes the mechanisms to accomplish this.
This document is a product of the Multiprotocol Label Switching
Working Group of the IETF.
This is now a Proposed Standard Protocol.
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
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USC/Information Sciences Institute
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