Oracle ZFS Storage Appliance Administration Manual page 312

Flushing Mappings from the Cache (CLI)
Related Topics
"Active Directory and DNS" on page 312
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Active Directory and DNS
If you plan to use Active Directory, the servers must be able to resolve hostname and
server records in the Active Directory portion of the domain namespace. For example, if
your appliance resides in the domain example.com and the Active Directory portion of the
namespace is redmond.example.com, your nameservers must be able to reach an authoritative
server for example.com, and they must provide delegation for the domain redmond.example.
com to one or more Active Directory servers serving that domain. These are requirements
imposed by Active Directory, not the appliance itself. If they are not satisfied, you will be
unable to join an Active Directory domain.
Related Topics
"DNS Configuration" on page 310
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"Active Directory Configuration" on page 293
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Non-DNS Resolution
DNS is a standard, enterprise-grade, highly-scalable and reliable mechanism for mapping
between hostnames and IP addresses. Use of working DNS servers is a best practice and will
generally yield the best results. In some environments, there may be a subset of hosts that can
be resolved only in NIS or LDAP maps. If this is the case in your environment, enable non-
DNS host resolution and configure the appropriate directory service(s). If LDAP is used for
host resolution, the hosts map must be located at the standard DN in your database: ou=Hosts,
(Base DN), and must use the standard schema. When this mode is used with NFS sharing
by netgroups, it may be necessary for client systems to use the same hostname resolution
mechanism configured on the appliance, or NFS sharing exceptions may not work correctly.
When non-DNS host resolution is enabled, DNS will still be used. Only if an address or
hostname cannot be resolved using DNS will NIS (if enabled) and then LDAP (if enabled)
be used to resolve the name or address. This can have confusing and seemingly inconsistent
results. You can validate host resolution results using the getent CLI command described
above.
Use of these options is strongly discouraged.
312 Oracle ZFS Storage Appliance Administration Guide, Release OS8.6.x • September 2016