I-D Action:draft-ietf-rtgwg-cl-requirement-02.txt

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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Routing Area Working Group Working Group of the IETF.


	Title           : Requirements for MPLS Over a Composite Link
	Author(s)       : C. Villamizar, et al.
	Filename        : draft-ietf-rtgwg-cl-requirement-02.txt
	Pages           : 20
	Date            : 2010-10-11

There is often a need to provide large aggregates of bandwidth that
are best provided using parallel links between routers or MPLS LSR.
In core networks there is often no alternative since the aggregate
capacities of core networks today far exceed the capacity of a single
physical link or single packet processing element.

The presence of parallel links, with each link potentially comprised
of multiple layers has resulted in additional requirements.  Certain
services may benefit from being restricted to a subset of the
component links or a specific component link, where component link
characteristics, such as latency, differ.  Certain services require
that an LSP be treated as atomic and avoid reordering.  Other
services will continue to require only that reordering not occur
within a microflow as is current practice.

Current practice related to multipath is described briefly in an
appendix.

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