Virtual Layer-2 Network with VLAN VNICs and VSRS Routing

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Solution Overview

Problem

Existing virtual networks in cloud computing environments have limitations that restrict their functionality and value, particularly in managing Layer-2 networks within virtualized environments.

Innovation Solution

Implementing a virtual Layer 3 network hosted by an underlying physical network and a virtual Layer 2 network, utilizing a VLAN with L2 VNICs and switches, and a VLAN switching and routing service (VSRS) to manage packet delivery and access control lists.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a virtual network is created in cloud computing, then on-demand availability of computing resources is provided, but functionality and value are limited

Engineering Contradiction:

ImprovefunctionalityVSAvoidnetwork structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the network into distinct virtual Layer 2 and virtual Layer 3 networks, each with separate switching and routing services. This segmentation allows independent optimization of Layer 2 connectivity (using VLANs and L2 VNICs) and Layer 3 routing (using virtual routers and gateways), thereby enhancing overall functionality while maintaining manageable complexity through modular architecture

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a new dimensional layer by implementing virtual network interfaces (VNICs) that operate between the physical network and virtual instances. This additional dimension enables virtual instances to communicate at Layer 2 while maintaining Layer 3 routing capabilities, expanding functionality without fundamentally redesigning the existing network structure

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If packet routing and access control are implemented, then secure and scalable delivery is enabled, but processing complexity increases

Engineering Contradiction:

Improvesecure deliveryVSAvoidprocessing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces virtual switching and routing services as intermediary components between physical network devices and virtual instances. These intermediaries handle packet processing, access control list (ACL) enforcement, and routing decisions, thereby securing packet delivery while distributing processing complexity across dedicated service functions rather than requiring complex processing at every individual node

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The virtual routing service automatically learns IP-to-MAC address mappings and maintains routing tables without manual configuration. This self-service capability reduces the operational complexity of managing secure delivery while maintaining reliable packet routing through automated protocol-based operations

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250260642A1Virtual layer-2 network

Publication Date: 2025.08.14 ORACLE INT CORP

AI summary

Systems and methods for a virtual layer-2 network are described herein. The method can include providing a virtual Layer 3 network in a virtualized cloud environment. The virtual Layer 3 network can be hosted by an underlying physical network. The method can include providing a virtual Layer 2 network in the virtualized cloud environment. The virtual Layer 2 network can be hosted by the underlying physical network.