DNS failover: Short TTL vs Multiple A Records?
1
Dec/080
Dec/080
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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