If you set a syslog level, only those messages whose severity is equal to or less than that level are sent to the syslog servers. For example, if you set the syslog level to Notifications (severity level 5), only those messages whose severity is betwen 0 and 5 are sent to the syslog servers. https://www.cisco.com/c/en/us/support/docs/wireless/4100-series-wireless-lan- controllers/107252-WLC-Syslog-Server.html