Virtual Switch Fabric Extension via VX ID Encoding
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Solution Overview
Problem
Current network configurations, such as Fibre Channel (FC) and Fibre Channel over Ethernet (FCoE), require complex and costly Domain ID assignment processes for network expansion and management, especially when adding new switches, which increases infrastructure costs and administrative burdens.
Innovation Solution
The solution simplifies virtual fabric configuration by eliminating the need for Domain ID assignment and using a virtual fabric extension identifier (vX ID) encoded in the FCID, allowing switches to forward frames based on vX ID instead of Domain ID, thereby reducing the complexity and cost of network expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Domain ID assignment process is used for FC network expansion, then network security and reliable message delivery are improved, but infrastructure cost and device complexity increase
Solution Approach 1:
The patent extracts the Domain ID assignment process from the network expansion procedure by using pre-assigned Domain IDs that are already embedded in the FCID of end station ports. This eliminates the need for complex E-port communication and discovery processes when adding new switches, while still maintaining the security and reliability benefits of Domain ID-based forwarding.
Solution Approach 2:
The patent applies preliminary action by pre-assigning Domain IDs to switches before they are added to the network. Each switch is configured with a Domain ID in advance, so when the switch is deployed, it can immediately participate in the FC network without requiring complex runtime discovery and assignment processes.
2Reliability
If Domain ID assignment process is used for FC network expansion, then network security is improved, but infrastructure cost increases
Solution Approach 1:
The patent removes the expensive E-port communication infrastructure requirement by extracting the Domain ID assignment function from the switch fabric. Instead of requiring full E-port functionality for discovery and assignment, the system uses simpler ports that forward frames based on pre-configured Domain IDs, reducing hardware and operational costs.
3Adaptability or versatility
If E-port communication is used for Domain ID assignment, then network expansion capability is improved, but loss of time increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring Domain IDs on switches before deployment. When a new switch is added to the network, it already has its Domain ID assigned, eliminating the time-consuming E-port communication and discovery process that would otherwise be required to assign Domain IDs dynamically.
4Ease of operation
If MAC address forwarding is used in Ethernet switches, then ease of operation is improved, but network security and reliable message delivery deteriorate
Solution Approach 1:
The patent merges the simplicity of MAC address forwarding with the security and reliability of Domain ID-based forwarding. The Ethernet switch forwards frames based on MAC addresses as usual, while the FC switch receives these frames, extracts the embedded FCID containing the Domain ID, and forwards them accordingly. This combination maintains operational simplicity while achieving FC-level security and reliability.
Data Source
AI summary
A Fibre Channel over Ethernet (FCoE) network can be inexpensively extended by additional switches (220x) that do not have a full FCoE functionality, e.g. do not have full E-port functionality. The additional switches may or may not have unique Domain IDs. A virtual switch fabric can be extended by such additional switches.