Failover settings, Failover type, Dns failover – HP Storage Mirroring V4.5 Software User Manual
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Failover settings
The Failover tab includes options that will be applied during Exchange failover.
Failover type
Failover Type indicates what name resolution method will be used to redirect users to the target
Exchange server in the event of a source failure. By default, DNS Failover is selected.
DNS failover
DNS Failover is the recommended method for failover. Use this option if you want to failover by
updating the DNS records associated with the source. This will modify all source server A, MX, and
PTR-type DNS resource records to point to the target.
In DNS Failover, the DNS records for the source server are modified to point to the target server’s IP
address. This allows clients to resolve the source Exchange server name to the target server’s
network name and IP address at failover time. DNS Failover eliminates duplicate server name and IP
addresses on your network.
NOTE:
For clustered environments, only DNS failover is supported.