I-D ACTION:draft-welzl-pmtud-options-00.txt

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	Title		: PMTU-Options: Path MTU Discovery Using Options
	Author(s)	: M. Welzl
	Filename	: draft-welzl-pmtud-options-00.txt
	Pages		: 20
	Date		: 2003-11-24
	
This document describes an experimental enhancement of Path MTU
Discovery that has the potential of reducing loss, speeding up
convergence, reducing load in routers which would otherwise need to
generate a large amount of ICMP messages, and alleviating certain
additional problems (interactions with tunnels, Black Hole
Detection). The idea is to use an IP Option which queries routers for
their MTU before starting a Path MTU Discovery process. The result
retrieved in this is used as an upper limit for Path MTU Discovery.
To this end, it is fed back to the source either at the packetization
layer (recommended) or at the IP layer.

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