Automated Maintenance Mode for Network Devices
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Solution Overview
Problem
In data centers, maintenance mode operations such as software upgrades on network devices often disrupt services and result in packet loss due to the need for manual intervention and reliance on proprietary vendor-specific procedures, which can be time-consuming and inefficient.
Innovation Solution
A network controller is configured to selectively initiate maintenance mode operations on network devices in a strategic, ordered manner, verifying traffic diversion to other devices before and after maintenance, using vendor-agnostic information translated into vendor-specific configurations to manage network devices without disrupting services or losing traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If manual maintenance operations are performed on network devices, then maintenance tasks can be completed, but service disruption and packet loss occur
Solution Approach 1:
The system performs preliminary actions by automatically diverting network traffic to alternative paths or devices before maintenance operations begin. This ensures that the network device can be maintained without causing service disruption or packet loss, as the traffic diversion is already in place before the maintenance starts.
Solution Approach 2:
The system introduces an intermediary mechanism (traffic diversion routing) between the network device and the network traffic. This intermediary allows maintenance to be performed on the device while traffic is routed through alternative paths, preventing direct interference between maintenance operations and active network services.
2Reliability
If proprietary vendor-specific procedures are used for maintenance, then device-specific requirements are met, but maintenance time and complexity increase
Solution Approach 1:
The system implements a universal maintenance framework that can handle multiple vendor-specific device types through a single automated interface. By maintaining a database of vendor-specific procedures and automatically selecting the appropriate ones, the system achieves vendor-agnostic operation while still meeting device-specific requirements, significantly reducing maintenance time and complexity.
Solution Approach 2:
The system dynamically changes operational parameters based on device type and maintenance requirements. It automatically adjusts maintenance procedures, traffic diversion strategies, and operational parameters according to the specific vendor and device model, optimizing the maintenance process for each device while maintaining overall system-wide automation.
3Reliability
If traffic is diverted during maintenance, then packet loss is prevented, but network topology complexity increases
Solution Approach 1:
The system implements self-service automation where the network controller automatically performs traffic diversion, monitors maintenance status, and restores normal traffic flow without manual intervention. This automation handles the complexity of network topology changes dynamically, preventing packet loss while eliminating the need for operators to manually manage complex routing configurations.
Solution Approach 2:
The system employs continuous feedback mechanisms to monitor network traffic patterns, device status, and maintenance progress. Based on this feedback, the controller dynamically adjusts traffic diversion strategies and routing configurations, automatically optimizing the network topology during maintenance operations to prevent packet loss while minimizing configuration complexity.
Data Source
AI summary
An example method includes determining, by a network controller, based on a high-level data model, vendor-agnostic device information for a first network device, translating the vendor-agnostic device information into vendor-specific device information, sending, to the first network device, first configuration information included in the vendor-specific device information to cause the first network device to switch into a maintenance mode and enable diversion of network traffic from the first network device to a second network device, responsive to verifying that the first network device has diverted the traffic, initiating maintenance procedures on the first network device while the first network device is in the maintenance mode, and sending, to the first network device, second configuration information included in the vendor-specific device information to cause the first network device to switch out of the maintenance mode and enable reversion of network traffic from the second device to the first network device.