This sets the lowest syslog severity level that will be delivered to the syslog server, where all logs at that severity or higher, which corresponds to a numerically lower or equal value, get sent. It lets an admin filter out noisy low-severity messages from flooding the syslog server while still receiving important alerts. An admin who only wants error-and-above messages forwarded would set els100SysLowestSyslogSeverity to the error level, filtering out warning and informational messages.