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Difficulty: MediumConfiguration and Change Management

Following an unannounced configuration drift incident, a network engineer submits a formal Request for Change (RFC) to deploy a standardized configuration baseline across all datacenter access switches. The RFC details the proposed technical modifications, maintenance window timing, and post-deployment verification procedures. However, the Change Advisory Board (CAB) defers authorization because the proposal fails to specify the exact performance thresholds (such as interface error spikes or packet loss rates) that would mandate immediately reversing the deployment. Which critical component of the RFC requires revision before approval can be granted?

  1. The rollback plan and its activation triggersAnswer
  2. B
    The disaster recovery full system restoration sequence
  3. C
    The post-implementation review and auditing framework
  4. D
    The initial troubleshooting methodology and hypothesis testing plan

Answer

The rollback plan and its activation triggers
A comprehensive Request for Change (RFC) must include a explicit rollback (backout) plan that specifies both the technical steps to revert to the previous baseline and the measurable abort criteria (such as packet loss or interface error thresholds). Without clear rollback triggers, engineers cannot determine when a deployment has failed and must be aborted to protect production services.

Step-by-Step Solution

1
Identify the missing requirement in the CAB evaluation scenario.
The CAB noted the absence of defined thresholds for aborting and reversing the deployment if network issues occur during implementation.
CAB approval requires risk mitigation controls that specify when and how to revert modifications to protect operational continuity.
2
Map the missing requirement to standard RFC documentation components.
Definite threshold criteria for reversing a change belong directly within the rollback (or backout) plan section of an RFC.
A robust rollback plan must detail both the technical steps to restore the prior configuration baseline and the explicit trigger conditions that mandate rolling back.

Key Concept

Request for Change (RFC) Essential Elements and Rollback Triggers
Estimated Time:1m 30s
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Topics

Configuration and Change Management

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