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Difficulty: Very hardSyslog Operations, Severity Levels, and Log Destination Configuration

A network operations center engineer is reviewing syslog messages emitted by a Cisco IOS router. Arrange the following syslog events in order from HIGHEST severity (lowest numerical severity level) to LOWEST severity (highest numerical severity level).

  1. 1Hardware watchdog failure causing complete system instability and unresponsiveness (%SYS-0-POWR_FAIL)
  2. 2Duplex mismatch on a GigabitEthernet interface resulting in frame collisions (%ETHINT-3-DUPLEX_MISMATCH)
  3. 3Execution of a write memory command that commits changes to NVRAM (%SYS-5-CONFIG_I)
  4. 4Initialization message emitted when establishing connection to a syslog server (%SYS-6-LOGGINGHOST_STARTSTOP)
  5. 5Packet header detail generated during an active execution of the debug ip packet command (%IP-7-UDP_PKT)

Answer

The correct sequence from highest severity (lowest numeric value) to lowest severity (highest numeric value) is: 1) Hardware watchdog system failure (Level 0 - Emergency), 2) Duplex mismatch error (Level 3 - Error), 3) Configuration commit notice (Level 5 - Notice), 4) Syslog server initialization message (Level 6 - Informational), and 5) Debug packet trace output (Level 7 - Debugging).
The correct ordering aligns with the standard Cisco IOS Syslog numerical severity scale: 0 (Emergency), 1 (Alert), 2 (Critical), 3 (Error), 4 (Warning), 5 (Notice), 6 (Informational), and 7 (Debugging). The hardware failure message is Emergency (Level 0), followed by interface error (Level 3), configuration change (Level 5), syslog service initialization (Level 6), and debug packet trace output (Level 7).

Step-by-Step Solution

1
Determine the numerical severity code assigned to each Cisco IOS event category in the Syslog standard.
System failure = Level 0 (Emergency); Duplex mismatch = Level 3 (Error); Configuration commit = Level 5 (Notice); Syslog host initialization = Level 6 (Informational); Debug packet trace = Level 7 (Debugging).
Cisco IOS categorizes log severity from Level 0 (most critical) through Level 7 (least critical).
2
Order the identified events in ascending numerical order of their severity levels.
The numerical order is 0 -> 3 -> 5 -> 6 -> 7.
A lower numerical severity level corresponds to a higher criticality event in Syslog architecture.

Key Concept

Cisco IOS Syslog severity level taxonomy (0-Emergency to 7-Debugging)
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Topics

Syslog Operations, Severity Levels, and Log Destination Configuration

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