Defining an adjacent SSCP list for CDRSCs

You can assign a list of adjacent SSCPs to a CDRSC as the route to use for cross-domain and cross-network session requests. The list defines the only routes available when establishing a session with this resource. If these routes are not available, the session fails. This function should be used when close control of route selection is desirable.

To define a list of adjacent SSCPs, code an ADJLIST definition statement in the adjacent SSCP table. VTAM® builds the adjacent SSCP list from the ADJCDRM definition statements which follow one or more ADJLIST statements.

The name of the ADJLIST definition statement defines the name of the adjacent SSCP list. This name is used by the ADJLIST operand on the CDRSC definition statement for a resource to specify which adjacent SSCPs should be used for all session setup requests for that resource. Only one adjacent list can be specified for a specific cross-domain resource.

The sample adjacent SSCP table that follows defines four adjacent SSCP lists: LIST1, LIST2, LIST3, and LIST4. LIST1 and LIST3 are identical. See Adjacent SSCP lists for CDRSCs for the corresponding CDRSC cross-domain resource major node. That cross-domain resource major node defines cross-domain resources that specify LIST1, LIST2, LIST3, and LIST4 as their adjacent SSCP lists.

The NETID operand is omitted from the NETWORK statement labeled NETB, indicating that the three ADJCDRM statements that follow define a default SSCP list for all networks.

For more information about implementation of adjacent SSCP lists, see the z/OS Communications Server: SNA Network Implementation Guide.

***********************************************************************
*        ADJSSCP DECK  =  ADJ7B      FOR HOST  SSCP7B                 *
***********************************************************************
*
ADJ7B    VBUILD  TYPE=ADJSSCP
*
LIST1    ADJLIST                  * list1 and List3 are identical lists
LIST3    ADJLIST
SSCP1A   ADJCDRM                  * sscp1a tried first
SSCP9C   ADJCDRM                  * sscp9c tried next if sscp1a fails
*                                 * no other sscps will be tried
*
LIST2    ADJLIST
SSCP9C   ADJCDRM
SSCP1A   ADJCDRM
*
LIST4    ADJLIST                  * use list4 if only sscp1a to be used
SSCP1A   ADJCDRM
*
NETB     NETWORK
*
SSCP1A   ADJCDRM
SSCP2A   ADJCDRM
SSCP9C   ADJCDRM
*
NETA     NETWORK NETID=NETA
*
SSCP2A   ADJCDRM
SSCP1A   ADJCDRM
*
NETC     NETWORK NETID=NETC
*
SSCP9C   ADJCDRM