Installing a message-flooding prevention table

Store the set of macroinstructions as a member of SYS1.VTAMLST. Use the member name as the name of the table.

No assembly or link-edit is required to install this table. The table is dynamically built when:
  • VTAM® is initialized, if the FLDTAB start option has been specified
  • An operator issues a MODIFY TABLE command specifying the table name

The MODIFY TABLE command lets you replace or modify the message-flooding prevention table without affecting VTAM operations. See z/OS Communications Server: SNA Operation for more information about this command.

To change the IBM®-supplied message-flooding prevention table:
  1. Copy the IBM-supplied table (ISTMSFLD).
  2. Rename the copy.
  3. Modify the copy.
VTAM uses the internal version of the IBM-supplied message-flooding prevention table if either of the following conditions is true:
  • No table has been specified (FLDTAB start option not specified)
  • The specified table (on the FLDTAB start option) has failed

You can display the name of the message-flooding prevention table by specifying ISTNOP, the name of the application program that represents the network operator, on the DISPLAY ID command. See z/OS Communications Server: SNA Operation.

Parent topic: Message-flooding prevention table