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Re: Multihoming an end user

On Sat, Sep 24, 2005 at 01:37:11PM -0400, Dan M. MacNeil wrote:
> With a tiny (< 100 connections per day) user base, you can pretty 
> comfortably set DNS TTL and negative TTL to 60 seconds, even with 
> caching 3 levels deep, it will take 3 minutes for the right IP# to be used.

Correctly working caches do not grow the TTL. If the original DNS server
says that the TTL is 60 seconds then all caches should obey it. In my
experience most caches work correctly with regards to TTL so that 60 seconds
will not be magically multiplied to three minutes.

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