A network administrator is conducting a logging audit on a Cisco IOS router to ensure accurate event classification. Arrange the following syslog event descriptions in order from the LOWEST numerical severity level code to the HIGHEST numerical severity level code.
- 1Emergency level message (%SYS-0): System is unusable due to an unrecoverable operating system crash
- 2Alert level message (%ENVIRO-1): Immediate action required due to a critical hardware thermal threshold breach
- 3Error level message (%LINK-3): An interface failure condition that degrades physical link operation
- 4Notification level message (%SYS-5): Normal but significant condition generated when entering configuration mode
Cevap
The correct sequence from lowest numerical code (0) to highest numerical code (5) is: Emergency (%SYS-0), Alert (%ENVIRO-1), Error (%LINK-3), and Notification (%SYS-5).
Cisco IOS syslog uses standardized numerical severity codes from 0 to 7: 0-Emergency, 1-Alert, 2-Critical, 3-Error, 4-Warning, 5-Notification, 6-Informational, and 7-Debugging. Arranging the given events from lowest numerical code to highest numerical code places Emergency (%SYS-0, code 0) first, followed by Alert (%ENVIRO-1, code 1), Error (%LINK-3, code 3), and Notification (%SYS-5, code 5).
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Anahtar Kavram
Cisco IOS Syslog Severity Levels and Numerical Hierarchy