HP Storage Mirroring Software - Manual (Page 228)

226 of 739
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 maximum TTL
of all the source’s A records. The recommended value is 300 seconds (5 minutes).
Note:
If the server that the Application Manager is running on has a problem
connecting to the DNS server through WMI, the TTL record will not be
updated. This will cause the Application Manager to return an error that the
RPC server is unavailable.
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
Application Manager Credentials .
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.
7. In the Password field, enter the password that will be used to access/modify DNS
records.
8. Click the Test button to validate that DNS failover is configured correctly for the
selected DNS server(s) and that the specified credentials are sufficient to update
DNS.
9. When the DNS configuration is complete, click OK to save your entries and return
to the Configure Protection window.
Note:
●
If you are running Windows Server 2000 on the primary DNS server
hosting zones or domains that contain source and/or target resource
records, you must have the DNS WMI Provider installed on that DNS
server.
●
The Dynamic updates setting for the DNS zone should be set to Secure
only. Otherwise, you must disable dynamic registration on the source
server in order to prevent the source from reclaiming its DNS record.
●
If a hosts file entry for the source server exists on the client machine,
errors may occur during a failover and failback.
●
Reverse lookup in DNS should be enabled. For more information about
enabling reverse lookup, refer to your Microsoft documentation.
●
DNS registration for the private (devoted to Storage Mirroring Recover)
NIC IP should be disabled.