The recent outage resulting from
severe weather prompted us to develope a system whereby the DNS servers
actively monitor the health of the webservers and update the DNS
records during an outage to ensure that the webpage is always
available. This is subject to the caveat that DNS is a
distributed system with caching so there will be propagation
delays. The Time To Live has been set low (5 minutes) on the
to reduce this as much as possible.