An engineer reviews a router's logs and discovers the following entry. What is the event's logging severity level? Router# *Jan 01 38:24:04.401: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed s

Question

Exhibit

Options

• Anotification
• Berror
• Cinformational
• Dwarning

• A
  2% (1)
• B
  88% (36)
• C
  7% (3)
• D
  2% (1)

Explanation

Explanation

Option B (error) is correct because the log entry contains LINK-3, where the number 3 directly corresponds to Syslog severity level 3, which is defined as "Error." Cisco's syslog system uses a numerical scale from 0 (Emergency) to 7 (Debug), and the digit embedded in the log message format (%FACILITY-SEVERITY-MNEMONIC) always indicates the severity level.

• Option A (notification) is incorrect because "notification" corresponds to severity level 5, not 3.
• Option C (informational) is incorrect because "informational" maps to severity level 6, which is even less severe.
• Option D (warning) is incorrect because "warning" corresponds to severity level 4, one step above error.

Memory Tip: Use the phrase "Every Awesome Cisco Engineer Will Notice Informational Debugging" to remember the 8 syslog levels in order (0–7): Emergency, Alert, Critical, Error, Warning, Notification, Informational, Debugging. When you see the number in the log message (%FACILITY-**3**-MNEMONIC), match it directly to this list - level 3 = Error.

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