We are looking to configure\fine tune our Exchange 2010 failover scheme. Currently we have a cas array (via a Kemp Load balancer) in production by the name of CAS00. CAS00 is the RPC server for all of our local Outlook clients.
We also have a CAS server in our disaster recovery site by the name of CAS03. We are thinking, when CAS00 in production goes down, we can manually change the DNS A record of CAS00 to point to the IP address of the DR Cas server. This way the clients still point to the CAS00 RPC server but the DR server is actually handling the exchange requests.
I was told something about creating a cname record that points record to tie into the failover scheme which would have a shorter TTL than the A record to create some sort of DNS redundancy and make the process more automated.
Can anybody shed any light as to how to accomplish this?
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