[dnsext] Infinity and draft-andrews-dnsext-expire-00.txt

[Edward Lewis <Ed.Lewis@neustar.biz>]

Title: Infinity and draft-andrews-dnsext-expire-00.txt

http://tools.ietf.org/html/draft-andrews-dnsext-expire-00:

#   There are also zone transfer graphs in which the slave never talks to
#   the master, so the effective expiry period becomes multiplied the
#   length of the zone transfer graph--which when it contains loops is
#   infinite.

I think loops are easily handled - no server "reloads" a zone of the same TTL.

As far as the expiry clock not ticking down from server to server - is that any more than a nuisance?  Sure, it's possible that a slave learns the zone from another, possibly near the time of expiry there.  Working NOTIFY takes care of this, but without working NOTIFY, there are other problems.

Other than that, relative to the draft, the solution contained in it seems solid.

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Edward Lewis                                                +1-571-434-5468
NeuStar

Never confuse activity with progress.  Activity pays more.