I-D Action:draft-farrel-mpls-lsp-ping-tlvs-01.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.

	Title           : Future-Proof TLV Codepoint Space for LSP Ping
	Author(s)       : A. Farrel, G. Swallow
	Filename        : draft-farrel-mpls-lsp-ping-tlvs-01.txt
	Pages           : 10
	Date            : 2007-11-17

Techniques for detecting Multi-Protocol Label Switched (MPLS) data
plane failures are described in RFC 4379 and include the definition
of a control protocol for testing and verifying Label Switched Path
(LSP) connectivity that is known as LSP Ping. The protocol consists
of a set of messages each of which contains data encoded as TLVs.

The LSP Ping protocol is being extended for several related uses.
Each extension gives rise to the definition of new TLVs to be carried
on the existing protocol messages.

The LSP Ping specification makes it mandatory that all TLVs are
understood by each participating Label Switching Router (LSR) that
receives an LSP Ping message. This makes future extensibility hard
without upgrading all LSRs in the network.
This document defines ranges in the TLV codepoint space so that TLVs
may be associated with different processing rules within an LSR if
the TLV is unknown. This will make extensibility more simple.

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