------------- The IESG has approved the Internet-Draft Link Bundling in MPLS Traffic Engineering <draft-ietf-mpls-bundle-04.txt> as a Proposed Standard. This document is the product of the Multiprotocol Label Switching Working Group. The IESG contact persons are Bert Wijnen and Scott Bradner. Technical Summary A MPLS Traffic Engineering (TE) link is a logical construct that represents a way to group/map the information about certain physical resources (and their properties) that interconnect Label Switch Routers into the information that is used by Constrained SPF for the purpose of path computation, and by GMPLS signaling. Depending on the nature of resources that form a particular MPLS TE link, for the purpose of GMPLS signaling in some cases a combination of <link identifier, label> is sufficient to unambiguously identify the appropriate resource used by an Label Switched Path. In other cases, a combination of <link identifier, label> is not sufficient. The latter cases are handled by using the link bundling construct that is described in this document. Working Group Summary The MPLS working group supported publication of this document. Protocol Quality This document was reviewed for the IESG by Scott Bradner. RFC Editor: Insert the following paragraph after the second paragraph in Section 4 (Link Bundling): As an example consider a TE link between a pair of SONET/SDH cross connects, where this TE link is composed of several fibers. In this case the label is a TDM time slot, and moreover, this time slot is significant only within a particular fiber. Thus, when signaling an LSP over such a TE link, one needs to specify not just the identity of the link, but also the identity of a particular fiber within that TE link, as well as a particular label (time slot) within that fiber.
