DNS failover: Short TTL vs Multiple A Records? by jgn on Monday, December 1, 2008 in Technology

Note to self:

Apparently the reason people do round-robin DNS with multiple A records is because Internet Explorer retires a bad IP better when the A Record disappears vs. the TTL expiring (worse case for the latter: 28 minutes!).

http://www.netwidget.net/books/apress/dns/info/failover.html

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