dcs man page on Solaris

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dcs(1M)			System Administration Commands		       dcs(1M)

NAME
       dcs - domain configuration server

SYNOPSIS
       /usr/lib/dcs [-s sessions] [ [-a auth] [-e encr] [-u esp_auth]  ] [-l]

DESCRIPTION
       The  Domain Configuration Server (DCS) is a daemon process that runs on
       Sun servers that support remote Dynamic Reconfiguration	(DR)  clients.
       It  is started by the Service Management Facility (see smf(5)) when the
       first DR request is received from a client connecting  to  the  network
       service	sun-dr. After the DCS accepts a DR request, it uses the libcf‐
       gadm(3LIB) interface to execute the DR operation. After	the  operation
       is performed, the results are returned to the client.

       The  DCS	 listens on the network service labeled sun-dr. Its underlying
       protocol is TCP. It is invoked as a server program by the SMF using the
       TCP  transport. The fault management resource identifier (FMRI) for DCS
       is:

       svc:/platform/sun4u/dcs:default

       If you disable this service, DR operations initiated from a remote host
       fail. There is no negative impact on the server.

       Security	 for the DCS connection is provided differently based upon the
       architecture of the system. The SMF specifies the correct options  when
       invoking	 the  DCS daemon, based upon the current architecture. For all
       architectures, security is provided on a per-connection basis.

       The DCS daemon has no security options that are applicable when used on
       a  Sun  Enterprise  10000 system. So there are no options applicable to
       that architecture.

       The security options for Sun Fire high-end systems are based  on	 IPsec
       options	defined	 as SMF properties. These options include the -a auth,
       -e encr, and -u esp_auth options, and can be set using  the  svccfg(1M)
       command. These options must match the IPsec policies defined for DCS on
       the system controller. Refer to the kmd(1M) man page in the System Man‐
       agement	Services  (SMS)	 Reference Manual. The kmd(1M) man page is not
       part of the SunOS man page collection.

       Security on SPARC Enterprise Servers is not configurable. The DCS  dae‐
       mon  uses a platform-specific library to configure its security options
       when running on such systems. The -l option is provided by the SMF when
       invoking	 the DCS daemon on SPARC Enterprise Servers. No other security
       options to the DCS daemon should be used on SPARC Enterprise Servers.

OPTIONS
       The following options are supported:

       -a auth

	   Controls the IPsec Authentication Header (AH) algorithm.  auth  can
	   be one of none, md5, or sha1.

       -e encr

	   Controls  the IPsec Encapsulating Security Payload (ESP) encryption
	   algorithm. encr can be one of none, des, or 3des.

       -l

	   Enables the use of  platform-specific  security  options  on	 SPARC
	   Enterprise Servers.

       -s sessions

	   Sets	 the  number of active sessions that the DCS allows at any one
	   time. When the limit is reached, the DCS  stops  accepting  connec‐
	   tions  until	 active	 sessions  complete  the execution of their DR
	   operation. If this option is not specified, a default value of  128
	   is used.

       -u esp_auth

	   Controls the IPsec Encapsulating Security Payload (ESP) authentica‐
	   tion algorithm. esp_auth can be one of none, md5, or sha1.

EXAMPLES
       Example 1: Setting an IPSec Option

       The following command sets the Authentication Header algorithm for  the
       DCS daemon to use the HMAC-MD5 authentication algorithm. These settings
       are only applicable for using the DCS daemon on	a  Sun	Fire  high-end
       system.

       # svccfg -s svc:/platform/sun4u/dcs setprop dcs/ah_auth = "md5"
       # svccfg -s svc:/platform/sun4u/dcs setprop dcs/esp_encr = "none"
       # svccfg -s svc:/platform/sun4u/dcs setprop dcs/esp_auth = "none"
       # svcadm refresh svc:/platform/sun4u/dcs

ERRORS
       The DCS uses syslog(3C) to report status and error messages. All of the
       messages are logged with the LOG_DAEMON facility.  Error	 messages  are
       logged  with  the  LOG_ERR and LOG_NOTICE priorities, and informational
       messages are logged with the LOG_INFO priority. The default entries  in
       the  /etc/syslog.conf  file  log	 all  of the DCS error messages to the
       /var/adm/messages log.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌─────────────────────────────┬─────────────────────────────┐
       │      ATTRIBUTE TYPE	     │	    ATTRIBUTE VALUE	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Availability		     │SUNWdcsu, SUNWdcsr	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Interface Stability	     │Evolving			   │
       └─────────────────────────────┴─────────────────────────────┘

SEE ALSO
       svcs(1),	 cfgadm_sbd(1M),  svcadm(1M),  svccfg(1M),  syslog(3C),	  con‐
       fig_admin(3CFGADM),   libcfgadm(3LIB),  syslog.conf(4),	attributes(5),
       smf(5), dr(7D)

NOTES
       The dcs service is managed by the service management facility,  smf(5),
       under the fault management resource identifier (FMRI):

       svc:/platform/sun4u/dcs:default

       Administrative actions on this service, such as enabling, disabling, or
       requesting restart, can be performed using  svcadm(1M).	The  service's
       status can be queried using the svcs(1) command.

SunOS 5.10			  25 Apr 2006			       dcs(1M)
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