Paula Wong
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DNS Mapping to two different IP for ISP Redundancy
Does anyone know how I can assign two different IP addresses to one DNS entry (say, mysite.com?)? The first IP would belong to ISP1 and second IP will belong to ISP2. The first IP would be active and the second IP will be active only when there is a failover from ISP1 to ISP2.
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You can have two A records pointing to two different IPs, but this will just "round robin", and offer then up alternately. This is good for load balancing, bit not so good for redundancy.
You COULD set a low TTL, then manually change the A record when needed.