Authentication-Driven Trunk Interface Setup for VLAN Propagation

Solution Overview

Problem

Manual configuration of network device interfaces to participate in VLAN information propagation protocols is tedious and error-prone, especially in dynamic network deployments.

Innovation Solution

Network devices dynamically configure interfaces to participate in VLAN information propagation protocols, simplifying the configuration process and enabling efficient VLAN information propagation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If manual configuration of network device interfaces is used to participate in VLAN information propagation protocols, then configuration control and precision are improved, but configuration time and operational complexity increase

Engineering Contradiction:

Improveconfiguration precisionVSAvoidconfiguration time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The network device automatically configures its own interface to participate in VLAN information propagation protocols by receiving authentication information from an authentication server. The device extracts configuration parameters from the authentication message and applies them locally without manual intervention, making the system self-configuring and eliminating time-consuming manual setup while maintaining accurate configuration through the authentication server's authorization

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The authentication server performs preliminary configuration preparation by including VLAN propagation interface configuration information in the authentication message before the device needs to use it. This pre-packaging of configuration data allows the device to immediately apply the correct settings upon receiving authentication, eliminating the need for separate manual configuration steps and reducing overall configuration time

Inventive Principle:

Principle #10Preliminary action

2Manufacturing precision

If manual configuration of network device interfaces is used to participate in VLAN information propagation protocols, then configuration accuracy is improved, but ease of operation deteriorates

Engineering Contradiction:

Improveconfiguration accuracyVSAvoidconfiguration ease

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The network device automatically configures its own interface to participate in VLAN information propagation protocols by receiving authentication information from an authentication server. The device extracts configuration parameters from the authentication message and applies them locally without manual intervention, making the system self-configuring and eliminating time-consuming manual setup while maintaining accurate configuration through the authentication server's authorization

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The authentication server acts as an intermediary that centrally manages and distributes configuration information to network devices. By including VLAN propagation interface configuration information in authentication messages, the server ensures accurate configuration delivery while simplifying the device's operational burden, as devices automatically process and apply the received configuration without manual intervention

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If dynamic configuration of network device interfaces is implemented for VLAN information propagation, then adaptability and automation are improved, but configuration reliability may worsen

Engineering Contradiction:

Improveconfiguration adaptabilityVSAvoidconfiguration reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The authentication server provides feedback by including configuration information in authentication messages, allowing the network device to dynamically adjust its interface configuration based on authentication results. This feedback mechanism ensures that dynamic configuration occurs only after successful authentication, maintaining reliability while enabling adaptability to different network conditions and devices

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The authentication server performs preliminary configuration preparation by including VLAN propagation interface configuration information in the authentication message before the device needs to use it. This pre-packaging of configuration data allows the device to immediately apply the correct settings upon receiving authentication, eliminating the need for separate manual configuration steps and reducing overall configuration time

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260081902A1Dynamic Configuration of Interfaces for VLAN Information Propagation

Publication Date: 2026.03.19 ARISTA NETWORKS INC

AI summary

A network device may have an interface configured as a trunk interface. The network device may receive information indicative of the state of the interface for enabling or disabling VLAN information propagation using the interface. Based on the received information, the network device may appropriately configure the interface to participate in a VLAN information propagation protocol.