HP StorageWorks Storage Mirroring DNS Failover Utility (DFO) release notes (T2558-96089, February 2008)

except in cases where the host OS is Windows 2003 Service Pack 1. Check the Hewlett-Packard
Support website for the latest information.
• When NAT or certain VPNs exist between the DNS server and the target, the Application
Managerwillbeunabletoconfigure protection due to limitations of WMI. Please contact
Hewlett-Packard Technical Support to obtain instructions for configuring protection manually.
Best Practices
The follow ing
guidelines present best practices for using the DNS Failover utility.
1. DFO.exe will
list all resource records for a given host name and/or IP address, but will only
modify the fo
llowing resource record types:
•A(host)type
•CNAME(alias)type
•MX(mailexc
hange) type
• PTR (reverse lookout) type
2. It is recommended that the administrator initially run DFO.exe to list all DNS resource records
associate
dwithspecific host names and/or host IP address(es) to determine if there are any
unsupported resource record types returned for the search criteria. If any unsupported resource
record types are identified and those resource records are required for proper failover, alternative
actions mu
st be taken to guarantee those records are changed upon failover.
3. Once the r
esource records have been listed and verified, it is then all right to configure D FO.exe
to failov
er/failback those resource records.
DNS Failover Utility (DFO) Usage
dfo [/dnssrvname <dnsservername>] [/srcname <sourceFQDN>]
[/srcip <sourceip>] [/tarip <targetip>]
[/tarname <targetFQDN>] [/recordtype <recordtype>]
[/username <username>] [/password <password>]
[/dnszone <dnszonename>] [/dnsdomain <dnsdomainname>]
[/logfile <logfilename>] [/failback [fbswitch]]
[/setpassword <username> <password> [machine] [file]] [/getpassword]
[/lock] [/unlock] [/trustee [trusteename]] [/verbose]
[[/flushdns] [/machine <macnineFQDN>] [/ttl <seconds>]
[/addomain <ADFQDN>] [/test] [/debug] [/?] [/help]
where
dnsserver-
name:
The name of the source domain/zone’s primary DNS server
(optional; local machine name used if missing)
sourceFQDN:
The source machine’s Fully Qualified Domain Name (required for
modify)
sourceip: The source machine’s IP address (required for modify)
targetip: The target machine’s IP address (required for modify)
targetFQDN:
The target machine’s Fully Qualified Domain Name (required for
modify)
recordtype:
The type of DNS resource records to modify or list. Values can be:
ALL (default)
MSEXCHANGE
A
CNAME
MX
PTR
STD
STANDARD (optional)
NOTE: STD and STANDARD are used to specify non-Exchange resource records.
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