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Difficulty: HardConfiguration and Change Management

A network administrator is executing a planned change during a maintenance window to implement new quality of service (QoS) dynamic bandwidth allocation rules on a primary distribution switch pair. Ten minutes into the post-implementation validation phase, automated network monitoring system alerts indicate that real-time telemetry traffic has breached defined latency and packet loss thresholds, failing the pre-established change success metrics. Which of the following is the most appropriate action for the administrator to take next?

  1. Initiate the documented rollback plan to restore the switch pair to its pre-change configuration baseline.Answer
  2. B
    Troubleshoot and modify the QoS queuing parameters directly on the live production switches to fix the latency issue before the maintenance window closes.
  3. C
    Restore the system using the last differential configuration backup restored in sequence after the latest full backup.
  4. D
    Reassign affected voice and video endpoints to use physical interface IP addresses directly instead of the active Virtual Router Redundancy Protocol (VRRP) VIP.

Answer

Initiate the documented rollback plan to restore the switch pair to its pre-change configuration baseline.
According to standard IT service management andCompTIA change management practices, every Request for Change (RFC) must include explicit post-implementation testing criteria and a rollback plan. When automated checks reveal that a change has breached SLA metrics or failed validation during the maintenance window, the administrator must immediately execute the pre-approved rollback plan to restore the network to its known, stable configuration baseline.

Step-by-Step Solution

1
Evaluate post-implementation validation metrics against established change plan acceptance criteria.
Validation fails because telemetry traffic latency and loss exceed acceptable SLA thresholds.
Changes must meet defined acceptance criteria during the maintenance window to be considered successful.
2
Identify the mandatory standard operational procedure when change validation criteria fail.
Determine that unapproved troubleshooting during a live maintenance window is forbidden.
Ad-hoc live changes violate change management guidelines and risk widespread outage.
3
Select the correct change management action.
Execute the pre-approved rollback procedure to return devices to the pre-change baseline.
Executing the rollback plan guarantees network stability and restores services to a known good state.

Key Concept

Change Management Rollback Execution and Validation Criteria
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Topics

Configuration and Change Management

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