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dhcp_modules(5)       Standards, Environments, and Macros      dhcp_modules(5)



NAME
       dhcp_modules - data storage modules for the DHCP service

DESCRIPTION
       This  man  page  describes  the characteristics of data storage modules
       (public modules) for use by the Solaris Dynamic Host Configuration Pro-
       tocol (DHCP) service.

       Public  modules  are  the  part  of  the DHCP service architecture that
       encapsulate the details of storing DHCP service data in a data  storage
       service.  Examples  of  data storage services are NIS+, Oracle, and ufs
       file systems.

       Public modules are dynamic objects which can be shipped separately from
       the Solaris DHCP service. Once installed, a public module is visible to
       the DHCP service, and can be selected for use by  the  service  through
       the  DHCP  service  management interfaces (dhcpmgr(1M), dhcpconfig(1M),
       dhtadm(1M), and pntadm(1M)).

       Public modules may be provided by Sun Microsystems,  Inc  or  by  third
       parties.

       The  Solaris  DHCP service management architecture provides a mechanism
       for plugging in  public  module-specific  administration  functionality
       into  the  dhcpmgr(1M) and dhcpconfig(1M) utilities. This functionality
       is in the form of a Java Bean, which is provided by the  public  module
       vendor.  This  Java  Bean collects public module-specific configuration
       from the user (you) and provides it to the Solaris DHCP service.

       The Solaris DHCP service bundles three modules with the service,  which
       are  described below. There are three dhcpsvc.conf(4) DHCP service con-
       figuration parameters pertaining to public modules: RESOURCE, PATH, and
       RESOURCE_CONFIG.  See  dhcpsvc.conf(4) for more information about these
       parameters.

   SUNWfiles
       This module stores its data in ASCII  files.  Although  the  format  is
       ASCII, hand-editing is discouraged. It is useful for DHCP service envi-
       ronments that support several hundred to a couple thousand  of  clients
       and lease times are a few hours or more.

       This  module's  data may be shared between DHCP servers through the use
       of NFS.

   SUNWbinfiles
       This module stores its data in binary files. It is useful for DHCP ser-
       vice  environments  with  many  networks and many thousands of clients.
       This module provides an order of magnitude increase in performance  and
       capacity over SUNWfiles.

       This module's data cannot be shared between DHCP servers.

   SUNWnisplus
       This module stores its data within a NIS+ domain. It is useful in envi-
       ronments where NIS+ is already deployed and facilitates  sharing  among
       multiple  DHCP  servers.  This  module suports several hundred to a few
       thousand clients with lease times of several hours or more.

       The NIS+ service should be hosted on a machine with  ample  CPU  power,
       memory,  and  disk space, as the load on NIS+ is significant when it is
       used to store DHCP data. Periodic checkpointing of the NIS+ service  is
       necessary  in order to roll the transaction logs and keep the NIS+ ser-
       vice  operating  at  its  highest  efficiency.  See   nisping(1M)   and
       crontab(1) for more information.

SEE ALSO
       crontab(1),   dhcpconfig(1M),   dhcpmgr(1M),  dhtadm(1M),  nisping(1M),
       pntadm(1M), dhcpsvc.conf(4), dhcp(5)

       Solaris DHCP Service Developer's Guide



SunOS 5.10                        24 Jan 2003                  dhcp_modules(5)