HP StorageWorks Storage Mirroring user's guide (T2558-96073, February 2008)

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5. Add the appropriate DFO command to your failover script using the following command syntax.
DFO Utility Command Syntax
Command
dfo
Description Used in script files to failover the DNS server name
Syntax
dfo [/DNSSRVNAME <dns_server_name>] /SRCNAME <source_fqd_name> /SRCIP <source_ip>
/TARIP <target_ip> /TARNAME <target_fqd_name> [/RECORDTYPE <rec_type>]
[/USERNAME <user_name> /PASSWORD <password>] [/DNSZONE <zone_name>]
[/DNSDOMAIN <domain_name>] [/LOGFILE <file_name>] /FAILBACK [fb_switch]
[/SETPASSWORD <user_name> <password>] [/GETPASSWORD] /TRUSTEE <trustee_name>
[/VERBOSE] [/TEST] [/DEBUG] [/HELP]
Options  DNSSRVNAME dns_server_name—The name of the source domain/zone's primary DNS server. If
not specified, the local machine will be used.
 SRCNAME source_fqd_name—The source machine's fully qualified domain name
 SRCIP source_ip—The source machine's IP address
 TARIP target_ip—The target machine's IP address
 TARNAME target_fqd_name—The target machine's fully qualified domain name (required only for
failback)
 RECORDTYPE rec_type—The type of DNS resource records to modify or list. Values record types
are
ALL, MSEXCHANGE, A, CNAME, MX, or PTR. By default, all record types are included.
 USERNAME user_name—The domain name of the user account. If not specified, the account
running the utility will be used.
 PASSWORD password—The password associated with the user account
 DNSZONE zone_name—The name of the DNS zone or DNS container, used to refine queries
 DNSDOMAIN domain_name—The name of the DNS domain, used to refine queries
 LOGFILE file_name—The name of the log file
 /FAILBACK—Denotes a failback procedure, performed after a failed source is recovered or
restored (required for failback)
 <fb_switch>—By default, the DFO will only failback records in the dfo_failback_config.dat
file. This option allows you to enter search criteria to identify the records to change back, even if
they are not in the configuration file. This option is also used if the
dfo_failback_config.dat
file is missing.
 SETPASSWORD user_name password—Stores user credentials in an encrypted file for later use. This
option must be run separately from a modify or list activity.
 GETPASSWORD—Retrieves previously stored user credentials. This option can only be used if the
credentials were previously stored with the setpassword option.
 TRUSTEE trustee_name—The domain account for the source machine (domain\machine$). DFO
attempts to deny write permissions to the DNS A record on failover for the account identified as
the trustee. “Deny write permissions” is then removed from the DNS A record on failback. This
keeps the source server from reclaiming its DNS A record if it comes back online prior to
failback.
 VERBOSE—Logging and display level set to maximum detail
 TEST—Runs in test mode so that modifications are not made, only listed
 DEBUG—Forces DFO to write the DNS resource record as-is to the dfolog.log file prior to
any DFO modify or list activity.
 HELP—Displays the syntax of the DNS Failover utility
Examples
 dfo /dnssrvname gamma.domain.com /srcname alpha.domain.com /srcip
206.31.4.10 /verbose
(Lists all resource records on the specified DNS server that match
the source criteria)
 dfo /dnssrvname gamma.domain.com /srcname alpha.domain.com /srcip
206.31.4.10 /tarip 210.11.12.13 /verbose
(Modifies all resource records on the
specified DNS server that match the source criteria, using the credentials of the account running
the utility to connect to the DNS server)