Resource registration in an APPN network

Resource registration places information about the location of resources in a directory services database. This registration reduces broadcast searches by ensuring that a resource will be found in the directory services database. Resources can be registered to a directory database on a network node server or to a central directory server.

For an application in an APPN network, the REGISTER operand on the GROUP or APPL statement specifies how it should be registered.

REGISTER=CDSERVR: An end node resource should be registered to its network node server and central directory resource registration should be requested for it. A network node resource is registered at the central directory server. This is the default for non-TSO applications because they are likely to be the object of a search.
REGISTER=NETSRVR: An end node resource should be registered to its network node server, but central directory registration should not be requested for it.
REGISTER=NO: The resource should not be registered.

For more information about how applications are registered, see the z/OS Communications Server: SNA Network Implementation Guide.

The sample application program major node that follows illustrates the specification of resource registration.

*********************************************************************
**
** APPL1A  - APPL DECK FOR SSCP1A
**
*********************************************************************
REGAPPL1 APPL  AUTH=(PASS,ACQ),                                        X
               REGISTER=NETSRVR      NETWORK NODE SERVER REGISTRATION
REGAPPL2 APPL  AUTH=(PASS,ACQ),                                        X
               REGISTER=CDSERVR      CENTRAL DIRECTORY REGISTRATION
REGAPPL3 APPL  AUTH=(PASS,ACQ),                                        X
               REGISTER=NO           NO REGISTRATION
REGAPPL4 APPL  AUTH=(PASS,ACQ)

While VTAM® is running, you can change the registration of VTAM applications in an APPN network by using the MODIFY RESOURCE command. For more information, see the z/OS Communications Server: SNA Operation.