Re: [DNSOP] Fwd: New Version Notification for draft-pan-dnsop-swild-rr-type-00.txt

Vernon Schryver <vjs@rhyolite.com> Tue, 15 August 2017 13:41 UTC

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Date: Tue, 15 Aug 2017 13:41:23 +0000
From: Vernon Schryver <vjs@rhyolite.com>
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Subject: Re: [DNSOP] Fwd: New Version Notification for draft-pan-dnsop-swild-rr-type-00.txt
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] From: Lanlan Pan <abbypan@gmail.com>

] Give the choice to operators, time is the best witness, like IP surpassed
] ATM.

That is backwards.  IP did not surpass ATM, because IP came long before
ATM.  Instead, end-to-end ATM was the last gasp of the end-to-end
circuit switching point of view.  End-to-end ATM was supposed to replace
IP, but instead the new virtual circuits of ATM came far too late and
did not solve the problems that packet switching had already solved.

ATM has not yet died and is still common for some uses.  For example,
ATM  is used as x.25 was used under IP in the early days of IP; many
DSL installations use AMT VCs.

A better and more relevant history is that of the SPF RR.  The SPF RR
was supposed to replace the use of the TXT rtype for SPF.  The SPF RR
was widely available in deployed DNS authoritative servers (via BIND).
I think it was in milter modules for sendmail and postfix.  Nevertheless,
it died because it came late, was only a modest improvement, and required
operators to do something more than they were doing.


Vernon Schryver    vjs@rhyolite.com