> There's  no  such  thing  as propagation delay in DNS, no matter how
> many  times  unknowing,  misleading  people  repeat  the phrase "DNS
> propagation".

I  seem  to  recall  your involvement with these unknowing, misleading
people:  http://www.menandmice.com/2000/2330_enterprise_bind.html.  As
apparent  via  Google  search, "DNS propagation" has widely understood
meanings    in    both    public   (non-authoritative)   and   private
(authoritative) contexts.

Vis-a-vis  authoritative  servers, it refers to the "pull replication"
of  zones,  taking  up  to one refresh interval to take effect in toto
(barring use of NOTIFY).

Vis-a-vis  the public Internet, it refers to the "pull replication" of
records, taking up to the max TTL to take effect in toto.

I  agree  that  "propagation"  is  an slightly off-base term given the
dictionary  definition. It may seem to connote a "push replication" or
"broadcast"  to  some,  which  of  course  it is not. But the observed
effect  is  the same--gradual replication of the most-recently-entered
data.    Even   if,   yes,   the   TTL   concept   states   that   the
most-recently-entered  data  should  not be considered to "exist" in a
global sense until the TTL expires, there's nothing particularly wrong
with  the  impression  of propagation, as long as the person using the
term knows what's happening under the surface.

--Sandy


------------------------------------
Sanford Whiteman, Chief Technologist
Broadleaf Systems, a division of
Cypress Integrated Systems, Inc.
e-mail: [EMAIL PROTECTED]

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