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From: bergum@SRC.Honeywell.COM (David Bergum)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: Is the DNS "working"?
Message-ID: <1991Apr19.150032.24304@src.honeywell.com>
Date: 19 Apr 91 15:00:32 GMT
Article-I.D.: src.1991Apr19.150032.24304
References: <NELSON.91Apr18230637@sun.clarkson.edu>
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In-Reply-To: nelson@sun.soe.clarkson.edu's message of 18 Apr 91 23:06:37
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In article <NELSON.91Apr18230637@sun.clarkson.edu> nelson@sun.soe.clarkson.edu (Russ Nelson) writes:


>Russ> In the past six days, we have had 287 FTP sessions initiated at the
>Russ> OLD IP address.  This, to me, is evidence that users have learned to
>Russ> avoid using host names, preferring to use IP addresses.

Not neccessarily.  It takes time for the old IP address to age out of local
cache, so the users may be using the host name and dns, but getting some
old data from their local server.  A good thing to do when you are going to
change an IP address is to set a short TTL for the A RR some time in
advance of the change, so ti will age out more quickly and the old data
will be replaced with the new RR with a normal TTL.
      A
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