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I-D ACTION:draft-ihren-delegation-ttls-00.txt



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


	Title		: Importance Of Parent-side TTLs For Referrals Several Layers Deep
	Author(s)	: J. Ihren
	Filename	: draft-ihren-delegation-ttls-00.txt
	Pages		: 0
	Date		: 2003-10-21
	
This memo documents a consequence of how the TTL re-writing
mechanism works (or rather does not work) for the case of a
resolver chasing a referral chain several layers deep.

The most common example of this is the case of a recursive resolver
trying to look up a third level domain name starting from the root.

A result of how this works is that it seems to be a good idea to
recommend an increase of the present standard TTL for delegations
from the root zone from the present 48 hours to something
significantly longer. But, more importantly, the choice of TTL for
the referral from the parent should be a decision made by the
child, not the parent.

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