SD-WAN Module Integrating Ethernet OAM for Real-Time Fault Detection
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Solution Overview
Problem
Existing SD-WAN solutions lack visibility and responsiveness to Ethernet level events, such as service failures and misconfigurations, due to their operation at IP and upper layers of the OSI model, leading to delayed or manual interventions by carriers, which can impact service level agreements and user experience.
Innovation Solution
Integration of Ethernet level intelligence into SD-WAN solutions through Operation, Administration, and Maintenance (OAM) protocols, enabling SD-WAN modules to receive and respond to OAM-related events, update routing information, and detect Ethernet level issues, thereby enhancing application routing and carrier SLAs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If SD-WAN solutions operate at IP and upper layers of the OSI model, then they can manage and control WAN traffic effectively, but they lack visibility into Ethernet level information such as service failures and quality-related conditions
Solution Approach 1:
The patent combines SD-WAN control plane functionality with Ethernet OAM (Operations, Administration, and Maintenance) protocols to create a unified system that operates at both IP and Ethernet layers. This merging allows the SD-WAN solution to simultaneously manage WAN traffic at the IP layer while monitoring Ethernet-level events through OAM frames, thereby gaining visibility into service failures and quality conditions without requiring separate independent systems.
Solution Approach 2:
The patent introduces an intermediary component that translates Ethernet OAM events into SD-WAN recognizable formats. This intermediary layer receives OAM frames at the Ethernet layer, extracts relevant information about service failures and quality conditions, and presents this information to the SD-WAN control plane, enabling cross-layer visibility without direct complex integration between Ethernet and IP layers.
2Reliability
If SD-WAN solutions use monitoring mechanisms at IP and upper layers, then they can measure availability and performance of applications, but they cannot detect Ethernet level events in real-time
Solution Approach 1:
The patent implements preliminary monitoring at the Ethernet layer by continuously capturing OAM frames before traffic reaches the IP layer. This preliminary action at the lower layer allows the system to detect Ethernet-level events such as service failures and quality degradations in real-time, before they impact upper-layer applications, enabling faster response and potential preventive routing decisions.
Solution Approach 2:
The patent establishes a feedback mechanism where Ethernet OAM event detection triggers immediate routing decisions in the SD-WAN control plane. When OAM frames indicate Ethernet-level issues, the system provides real-time feedback to update routing tables and switch traffic to alternative paths, creating a closed-loop system that continuously monitors and responds to Ethernet events without manual intervention.
3Productivity
If SD-WAN solutions lack Ethernet level visibility, then their architecture remains simpler, but carriers experience delayed or manual interventions that impact service level agreements
Solution Approach 1:
The patent enables the SD-WAN system to automatically detect Ethernet-level events through OAM frame monitoring and self-adjust routing decisions without requiring carrier intervention. The system serves itself by continuously monitoring OAM events, automatically updating routing tables, and switching traffic paths in response to detected issues, thereby eliminating manual carrier intervention and improving response speed while maintaining operational simplicity.
Data Source
AI summary
System and methods for enabling SD-WAN functionality to respond to Ethernet level OAM-related events are provided. According to an embodiment, a Software-Defined Network Wide Area Network (SD-WAN) module of a network device operating as both an SD-WAN node and a Maintenance Entity Group Endpoint (MEP) receives Operation, Administration and Maintenance (OAM) information via one of multiple OAM-enabled links of the network device. The SD-WAN module determines based on the OAM information, an event associated with the OAM network relating to one or more of service availability, Quality of Service (QoS), and service configuration, and based on the determined event, updates routing information to determine how to route application traffic over the OAM-enabled links.