Library /sys$common/syshlp/nclhelp.hlb Network Management, Logical Names (OpenVMS)  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    System logical names can be defined in SYS$MANAGER:
    NET$LOGICALS.COM which allow you to modify certain network
    defaults.  If you don't have a net$logicals procedure on
    your node, you can create one by copying the SYS$MANAGER:
    NET$LOGICALS.TEMPLATE file.  Here are some of those logicals:

    NET$entity_name_STARTUP Specifies a logical name that points to an
                            alternate file location for that entity's
                            startup script.

    NET$IGNORE_DECNET       If set to true, the network is not started.
                            If not defined or set to false, the network
                            starts normally.

    NET$IGNORE_EVD          If set to true, the event dispatcher is not
                            started.  Use of this logical is unsupported.

    NET$STARTUP_MOP         If set to true, MOP starts.  If not defined
                            or set to false, MOP is not started.  Note
                            that in order for MOP to start correctly,
                            the MOP startup scripts must exist on the
                            system, so MOP must have been configured
                            using net$configure.   Simply defining this
                            logical is not enough to create the MOP
                            entity.

    NET$STARTUP_QUIET_NCL   If defined to false, NCL output is maximized
                            during network startup.

    NET$NOISY_SHUTDOWN      If defined to true, NCL output is displayed
                            during shutdown.

    NCL$ENVIRONMENT         Defining to "NoBackTrans" prevents NCL from
                            translating addresses to fullnames.

    In addition, logicals can be defined in NET$LOGICALS.COM to modify
    default quotas for the NET$ACP, NET$EVD or NET$MOP processes or to
    assign the output for those processes to certain files.  Care must
    be taken in modifying these defaults.

    Please refer to the .TEMPLATE file for more information.