Network Device Discovery via CDP and LLDP Protocol Activation
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Solution Overview
Problem
Network discovery in large networks is challenging due to resource-intensive methods like ping sweeps and the inability of older devices to support Layer 2 protocols like LLDP, leading to incomplete device detection.
Innovation Solution
A method that identifies devices expected to be CDP-enabled but not turned on, sends notifications to the NMS to enable CDP or LLDP, allowing network management systems to activate these protocols and discover all devices within the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ping sweep method is used to discover devices in a network, then substantially all devices can be discovered, but significant network resources are consumed and load on the network increases
Solution Approach 1:
The patent introduces an intermediary mechanism where CDP/LLDP protocols act as mediators between devices for automatic discovery. Instead of the network management system directly pinging every device, CDP/LLDP enable devices to autonomously advertise and discover each other, significantly reducing the resource burden on the network while maintaining comprehensive discovery capability.
Solution Approach 2:
The patent applies preliminary action by pre-enabling CDP or LLDP on devices before network operation. This allows devices to automatically perform discovery functions without requiring reactive ping sweeps, thereby reducing ongoing network resource consumption while maintaining complete device visibility.
2Productivity
If LLDP protocol is used for device discovery, then devices can advertise identity and capabilities on local network, but older devices that do not support LLDP cannot be discovered
Solution Approach 1:
The patent implements universality by supporting multiple discovery protocols (both CDP and LLDP) within the same network management system. This multi-functional approach ensures that the system can work with both modern devices supporting LLDP and older devices using CDP, thereby maintaining broad protocol compatibility while preserving high discovery efficiency through automated protocol operation.
3Speed
If CDP or LLDP is turned on for automatic device advertisement, then real-time discovery is achieved, but devices that do not have these protocols enabled cannot be discovered
Solution Approach 1:
The patent implements feedback mechanisms where the network management system continuously monitors for devices that should be advertising via CDP/LLDP but are not doing so. When such devices are detected through alternative means or reporting gaps, the system can trigger notifications or investigations to ensure complete device detection, thereby maintaining both real-time discovery speed and comprehensive detection accuracy.
Data Source
AI summary
In one embodiment, a method includes identifying whether there is a first device in a network that is expected to be associated with a discovery protocol but does not have the discovery protocol turned on. The method also includes providing a notification to a management arrangement when the first device is identified. The management arrangement manages the network, and the notification indicates that the first device is expected to be associated with the discovery protocol but does not have the discovery protocol turned on.