SNMP Protocol Extension for Error Code Compatibility
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Solution Overview
Problem
The SNMP protocol, particularly in versions 1 and 3, lacks the ability to expand error codes, leading to compatibility issues between network management stations and devices from different manufacturers, and often results in timeouts due to insufficient processing time for SET requests.
Innovation Solution
An extension to the SNMP protocol is introduced that allows for the transmission of additional data content, including error codes, using Object Identifiers (OIDs), enabling compatibility and expanded functionality while maintaining standard compliance, and allowing agents to process requests within specified times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the SNMP protocol uses standardized predefined error codes, then compatibility between different manufacturers is maintained, but the ability to transmit manufacturer-specific error codes is lost
Solution Approach 1:
The error code transmission is segmented into two parts: a standardized error code field for basic error types (maintaining compatibility) and an additional manufacturer-specific data field for extended error information (enabling versatility). This segmentation allows both standardized and customized error codes to coexist without conflict.
Solution Approach 2:
An intermediary data structure is introduced that includes both the standardized error code and an additional manufacturer-specific field. This intermediary structure acts as a bridge between the standardized SNMP protocol and manufacturer-specific error code requirements, allowing both to function together.
2Speed
If the network management station specifies a short processing time for SET requests, then response time is improved, but the agent cannot complete internal processes leading to timeouts
Solution Approach 1:
The agent performs preliminary actions by preparing and sending a preliminary response within the specified time frame, indicating that the request is being processed. This preliminary response prevents timeout errors while allowing the agent additional time to complete its internal processes and send the final result.
Solution Approach 2:
The response is sent in periodic stages: first a preliminary response within the specified time frame to acknowledge receipt and prevent timeout, then a subsequent response when processing is complete. This periodic action pattern ensures both timely acknowledgment and complete processing.
3Measurement precision
If manufacturer-specific error codes are transmitted using extended data packets, then error detection capability is improved, but compatibility between different manufacturers' network management stations and devices is lost
Solution Approach 1:
The data packet structure is designed to be universal by including both standardized error code fields (for broad compatibility) and manufacturer-specific extension fields (for precise error detection). This multi-functional structure allows the same packet format to serve both standardized and customized error reporting needs across different manufacturers.
Data Source
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AI summary
The invention relates to a method for operating a network management station that exchanges data with the network devices connected to said station via bus connections by means of the SNMP protocol. An agent is integrated in each network device, said agent detecting the state of the network device and also being able to carry out adjustments or trigger actions in said device, wherein said agent communicates with the network management station via SET and GET commands. Furthermore, an error detection and/or an error notification between the network management station and the respective agents is carried out via the SNMP protocol. The method is characterized in that a further data exchange between the network management station and the respective agents is carried in addition to the data exchange provided according to the SNMP protocol in order to exchange further data content between the network management station and the respective agents using said further data exchange.