The connection of an independent LU (CDRSC) to an adjacent link station is only for the duration of the independent LU's sessions. In addition, the independent LU can have multiple concurrent sessions using different adjacent link stations.
The rules for multiple definition of resources are presented in Table 1. This table assumes that a CDRSC is currently defined to VTAM® (existing resource). It also assumes that the operator issues a command to activate a major node that contains new definition statements (input resource). Multiple definition of resources occurs when the name of an input resource matches the name of an existing resource.
Existing resource | Input resource | Major node after integration | Notes |
---|---|---|---|
Dynamic CDRSC | Dynamic CDRSC | Not applicable | 1 |
Dynamic CDRSC | Predefined Independent LU | ISTPDILU | 2, 5 |
Dynamic CDRSC | Predefined CDRSC | CDRSC major node | 2, 5 |
Predefined Independent LU | Dynamic CDRSC | Not applicable | 1 |
Predefined Independent LU | Predefined Independent LU | Not applicable | 4 |
Predefined Independent LU | Predefined CDRSC | ISTPDILU | 2, 6 |
Predefined CDRSC | Dynamic CDRSC | Not applicable | 1 |
Predefined CDRSC | Predefined Independent LU | ISTPDILU | 3, 7 |
Predefined CDRSC | Predefined CDRSC | Not applicable | 4 |
Predefined APPL | Predefined CDRSC | CDRSC major node | 5 |
Predefined LU | Predefined CDRSC | CDRSC major node | 5 |
MNPS application | Predefined CDRSC | Not applicable | 8 |
If the two resource definitions have different NETID values and at least one is specified with NQNMODE=NQNAME, either by definition or start option, the resource definitions are not merged.
If the two resource definitions have different NETID values and at least one is specified with NQNMODE=NQNAME, either by definition or start option, the resource definitions are not merged.
If the two resource definitions have different NETID values and at least one is specified with NQNMODE=NQNAME, either by definition or start option, the resource definitions are not merged.
Exceptions to the merging of multiple resource definitions might occur. These exceptions occur because of different NETID values for the existing and new resource definition, which are both specified with NQNMODE=NAME (either by definition or start option). Changes in the NETID of a given resource can occur only if the resource does not have any existing or pending sessions.
If either the existing resource or the input resource is specified with NQNMODE=NQNAME and they have different NETID values, the resource definitions are not merged.
Merging multiple resource definitions causes operands from the input resource to overlay values in the existing resource only in cases where the operands of the existing resource are default values. Defined values on operands of the existing resource are not overlaid with default values on operands of the input resource. Default values and sifted values from the input resource apply to the existing resource definition as well, so long as they do not override defined values on operands of the existing resource. However, not all operands are necessarily integrated as a result of the second resource definition.
If the two resource definitions have different NETID values and at least one is specified with NQNMODE=NQNAME, either by definition or start option, the resource definitions are not merged.
If the two resource definitions have different NETID values and at least one is specified with NQNMODE=NQNAME, either by definition or start option, the resource definitions are not merged.
When multiple resource definitions are merged, the resulting values for LUALIAS and NQNMODE are determined by several factors. The following tables show when LUALIAS and NQNMODE values are integrated.