HP Storage Mirroring V4.5 Software User Manual
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After you select the DNS Failover option, click Configure. The Configure DNS Failover window will
appear.
Configure the following information for DNS failover:
1.
To add additional DNS server IP addresses, type the IP address into the DNS Server field, then
click Add.
2.
The list box under the DNS Server field contains all DNS IP addresses for the source and target
servers. The label after the DNS IP address indicates whether the DNS IP address belongs to the
source, target, or both.
3.
In the Source IP column, select the checkbox next to the source IP address(es) to be monitored
for failover.
4.
In the Target IP column, select the target IP address to be used when failover occurs.
5.
To specify the value the Application Manager will establish for Time to Live (TTL) on the source’s
affected DNS records, select the Update TTL checkbox, then enter the desired update interval
(in seconds). The default is the current TTL of the source’s A records. The recommended value is
300 seconds (5 minutes) or less.
6.
In the Username field, enter the user name that will be used to access/modify DNS records.
The login account MUST be a member of the DNSAdmins group for the domain in which the DNS
server resides. For more information about permissions, see
Recommended Credentials
on
page A-1.
You may enter a user name for a different domain by entering a fully-qualified user name. The
fully-qualified user name must be in the format domain\username or username@domain. If
you enter a non-qualified name, the DNS domain will be used by default. The domain name is
obtained from the DNS server name, provided that reverse lookup in DNS is enabled. For more
information about enabling reverse lookup, refer to your Microsoft documentation.
NOTE:
To remove an IP address from the DNS server list, select the IP address, then click
the Delete button.
NOTE:
If one or more IP addresses are configured for the SMTP virtual server on the target,
the first IP address will be the default target IP address for all source IP addresses.
If the target is monitoring multiple source IP addresses for failover, each monitored
source IP address must be mapped to a unique target IP address.