242Table 14 Log levelsSeverityvalue Level Description0 Emergency The system is unusable. For example, the system authorization has expired.1 Alert Action must be taken immediately. For example, traffic on an interface exceedsthe upper limit.2 Critical Critical condition. For example, the device temperature exceeds the upper limit,the power module fails, or the fan tray fails.3 Error Error condition. For example, the link state changes or a storage card isunplugged.4 Warning Warning condition. For example, an interface is disconnected, or the memoryresources are used up.5 Notification Normal but significant condition. For example, a terminal logs in to the device,or the device reboots.6 Informational Informational message. For example, a command or a ping operation isexecuted.7 Debugging Debug message.Log destinationsThe system outputs logs to the following destinations: console, monitor terminal, log buffer, log host, andlog file. Log output destinations are independent and you can configure them after enabling theinformation center.Default output rules for logsA log output rule specifies the source modules and severity level of logs that can be output to adestination. Logs matching the output rule are output to the destination. Table 15 shows the default logoutput rules.Table 15 Default output rulesDestination Log source modules Output switch SeverityConsole All supported modules Enabled DebugMonitor terminal All supported modules Disabled DebugLog host All supported modules Enabled InformationalLog buffer All supported modules Enabled InformationalLog file All supported modules Enabled InformationalDefault output rules for diagnostic logsDiagnostic logs can only be output to the diagnostic log file, and cannot be filtered by source modulesand severity levels. Table 16 shows the default output rule for diagnostic logs.
