Network Device Software Upgrade Rollback Mechanism
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Solution Overview
Problem
Current network operating system upgrades can lead to 'amnesiac mode' where devices become unreachable due to compatibility issues, consuming resources and causing traffic loss, as users often skip validation of active configurations, assuming backward compatibility.
Innovation Solution
Implementing a method for network devices to receive new software with an option to wait a predetermined period for confirmation of installation, allowing for automatic rollback to previous software if confirmation is not received, thus conserving resources and preventing resource consumption issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If network devices perform software upgrades without confirmation, then upgrade speed is improved, but device reliability deteriorates due to potential compatibility issues and amnesiac mode
Solution Approach 1:
The system performs preliminary validation of configuration compatibility before applying the software upgrade. The validation process checks whether the active configuration is compatible with the new software version, and only proceeds with installation if validation passes, preventing amnesiac mode and ensuring reliable operation.
Solution Approach 2:
The system implements a feedback mechanism where the user receives confirmation that the software installation was successful and the device is operational. This feedback loop ensures that only successful upgrades are completed, and provides visibility into the upgrade status while maintaining device reliability.
2Reliability
If network devices wait for confirmation of software installation, then device reliability is improved, but upgrade time increases due to waiting period
Solution Approach 1:
The system performs all necessary validation and preparation actions before the actual software installation begins. By validating configuration compatibility in advance and preparing the upgrade process, the system minimizes the time required during the confirmation waiting period while ensuring reliable installation.
3Loss of energy
If network devices automatically rollback on failure, then resource wastage is reduced, but device complexity increases due to rollback mechanism
Solution Approach 1:
The system implements self-service through automatic rollback functionality. When software installation fails or the device enters amnesiac mode, the system automatically rolls back to the previous software version without requiring manual intervention. This self-service mechanism prevents resource wastage by restoring operational devices while managing complexity through automated decision-making.
Data Source
AI summary
A network device may receive new network device software and may receive an option to wait a predetermined period of time for confirmation of installation of the new network device software. The network device may determine, based on the option, whether the confirmation of installation of the new network device software is received prior to expiration of the predetermined period of time. The network device may selectively perform an automatic rollback to previous network device software based on failing to receive the confirmation of installation of the new network device software prior to expiration of the predetermined period of time, or utilize the new network device software based on receiving the confirmation of installation of the new network device software prior to expiration of the predetermined period of time.