CDRDYN start option

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   .-CDRDYN--=--YES-----.   
>>-+--------------------+--------------------------------------><
   '-CDRDYN--=--+-NO--+-'   
                '-YES-'     

Specifies whether the host is authorized to dynamically define CDRSC representations of cross-domain, cross-network, or APPN resources when a session request is received from or sent to an adjacent SSCP or CP.

You can change the value of CDRDYN with the MODIFY VTAMOPTS command while VTAM® is running.
Note:
  1. For information specific to cross-domain sessions, see CDRDYN.
  2. The CDRDYN start option applies only to the host CDRM. The CDRDYN start option value, or a MODIFY VTAMOPTS value, overrides only the CDRDYN value on the hosts' CDRM definition statement.
  3. Using the CDRDYN start option instead of the CDRDYN operand allows greater flexibility with the DYNLU start option.
CDRDYN=NO
Causes the failure of any cross-domain, cross-network, or APPN session request for a cross-domain, cross-network, or APPN resource that has no predefined CDRSC entry.
CDRDYN=YES
Authorizes dynamic definition of cross-domain, cross-network, or APPN resources by this host, eliminating the need to predefine certain CDRSCs. Both origin logical units and destination logical units can be dynamically defined.