Do many ISP's cache A records with TTL of 0 ?

[Brad Knowles]

At 10:45 AM +0100 9/1/01, Mark van Kerkwyk wrote:

>  I was told that a while back AOL used to cache all records for a number of
>  days, irrespective of whether it had a TTL of 0 or anything (eg over 1
>  day).

	I used to work at AOL, and indeed I was the primary person who 
set up their system-wide caching nameserver farm (capable of handling 
32,000-64,000 DNS queries per second), and I continue to maintain 
contacts there within the DNS Admin group.  I've never heard of them 
doing anything like this in my life.

>  Does anyone know of any ISP's perform this practice and in turn screw up
>  any global server load balancing which utilises a TTL of 0, if so, where
>  might one find a list of who does this ?

	I'm not aware of any ISPs that do this, and if I did, I would 
make sure that they are published on a "page of shame".

-- 
Brad Knowles, <brad.knowles at skynet.be>

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