GBP ID Tracing Across Gateways for Policy Mistranslation Diagnosis
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Solution Overview
Problem
In multi-domain network environments, incorrect or outdated GBP ID translations at gateway devices can lead to communication errors and security breaches due to misapplication of group-based policies, which are difficult to detect and identify.
Innovation Solution
Implementing GBP ID tracing using trace packets and response packets to track GBP IDs at various nodes in a virtual tunnel, creating a trace record to detect mistranslations and trigger remediation actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If GBP ID translation is performed at gateway devices to support different domains, then adaptability of group-based policies across domains is improved, but reliability of policy enforcement deteriorates due to mistranslation errors
Solution Approach 1:
The patent implements a feedback mechanism where trace packets are sent through the network path and response packets are received to verify GBP ID translations. The tracing system compares expected translations with actual translations at each gateway device, providing feedback that identifies mistranslations and enables correction of policy enforcement errors.
Solution Approach 2:
The patent introduces an intermediary tracing system that mediates between the GBP ID translation process and policy enforcement. This intermediary layer monitors translations without disrupting normal traffic flow, allowing detection and correction of translation errors while maintaining the adaptability benefits of cross-domain GBP ID translation.
2Difficulty of detecting and measuring
If traditional network monitoring is used, then device-level connectivity is detected, but detection precision of policy enforcement errors deteriorates due to inability to trace GBP ID translations
Solution Approach 1:
The patent segments the monitoring function into two layers: traditional connectivity monitoring at the device level and new GBP ID translation tracing at the policy level. The trace packets carry GBP ID information through each gateway, allowing segmentation of translation verification from general network monitoring and enabling precise detection of policy enforcement errors.
Solution Approach 2:
The patent adds another dimension to network monitoring by tracing GBP ID translations alongside traditional connectivity monitoring. This dimensional addition allows simultaneous observation of both physical network status and logical policy enforcement status, improving measurement precision without losing existing monitoring capabilities.
3Measurement precision
If manual verification of GBP ID translations is performed, then measurement precision of translation accuracy is improved, but productivity of network operations deteriorates due to time-consuming verification
Solution Approach 1:
The patent implements self-service verification where the network infrastructure automatically performs GBP ID translation tracing without requiring manual intervention. The tracing system autonomously sends trace packets, collects responses from gateway devices, analyzes translation accuracy, and generates reports, enabling continuous verification while maintaining high network operation productivity.
Data Source
AI summary
In some examples, a first network device in a first domain sends, to a first gateway device of the first domain, a trace packet targeted to a destination device in a second domain, the trace packet including a first virtual tunnel header and a probe request, the first virtual tunnel header containing a first policy identifier. The first network device receives a response packet including a second virtual tunnel header and probe information, the probe information containing a translated policy identifier field to store any translated policy identifier produced by a second gateway device of the second domain. The first network device initiates an update of a trace record by adding a policy identifier contained in the translated policy identifier field to support diagnostics relating to a policy identifier mistranslation.