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VTAM start options Networking on z/OS |
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Start options provide information about the conditions under which VTAM runs. Start options also enable you to tailor VTAM to meet your needs each time VTAM is started. Many options can have defaults specified as start options, thus reducing the amount of coding required. Many start options can be dynamically modified and also displayed. You should be aware that some start options cannot be dynamically modified and require that VTAM be recycled. A complete description of start options is in z/OS Communications Server: SNA Resource Definition Reference. For a brief listing of the start options, see z/OS Communications Server: SNA Operation. To use a start option list, create a data set member named ATCSTRyy and put it in the VTAMLST partitioned data set. The yy value can be any two alphanumeric characters and allows you to create different versions of the option list (ATCSTR00, ATCSTR01, ATCSTR02, and so forth) and therefore different versions of VTAM start options. VTAM is started from the z/OS console or during z/OS system startup
with the following command:
START NET,,,(LIST=yy)
When VTAM initializes,
LIST=yy determines which option list to use.
For example, if you specify LIST=01, VTAM uses ATCSTR01.VTAM always attempts to locate ATCSTR00 first, regardless of the option list chosen. If ATCSTR00 does not exist, VTAM sends a warning message to the operator. To avoid receiving this message, create an ATCSTR00 file that contains only comments or start options that are always used for that particular VTAM. Required VTAM start options Some start options
are required:
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