FCoE Packet Transmission Without Switch Protocol Conversion
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Solution Overview
Problem
Current systems face network traffic bottlenecks when transmitting Fibre Channel over Ethernet (FCoE) packets due to the need for protocol conversion in switches, which can impact performance and require costly upgrades or changes in existing infrastructure.
Innovation Solution
The solution involves configuring host computers and target storage arrays to establish virtual links using unique VLAN IDs and Host IDs, allowing FCoE packets to be transmitted directly between hosts and storage arrays without protocol conversion in switches, utilizing Enhanced Ethernet networks and FCoE Storage Proxy logic for encapsulation and decapsulation, thereby maintaining Fibre Channel protocol integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If FCoE packets are transmitted through switches with protocol conversion, then network connectivity is maintained, but network latency increases and performance deteriorates
Solution Approach 1:
The patent extracts the protocol conversion function from the network switch and relocates it to the edge devices (hosts and storage arrays). This eliminates the performance bottleneck in the network core while maintaining protocol translation capability, directly resolving the contradiction between transmission speed and protocol conversion requirements.
Solution Approach 2:
The patent introduces FCoE encapsulation as an intermediary mechanism that allows Fibre Channel protocols to be transported over Ethernet networks without requiring switches to perform protocol conversion. The encapsulated FCoE frames traverse the Ethernet network transparently, maintaining high transmission speed while enabling protocol compatibility.
2Adaptability or versatility
If FCFs are deployed to enable FCoE communication, then protocol compatibility is achieved, but network bottleneck and performance limitation occur
Solution Approach 1:
The patent removes the FCF (Fibre Channel Forwarder) component from the network architecture and relocates its protocol conversion functions to the edge devices. This eliminates the single-point bottleneck created by FCFs while maintaining Fibre Channel protocol compatibility through direct encapsulation and decapsulation at the endpoints.
Solution Approach 2:
The patent segments the protocol conversion function from the network core and distributes it to individual hosts and storage arrays. Each endpoint independently performs encapsulation or decapsulation, eliminating the centralized bottleneck and enabling parallel processing that increases overall network throughput.
3Reliability
If multiple adapters and cables are used for FC and Ethernet networks, then protocol-specific performance is maintained, but system complexity and cable management difficulty increase
Solution Approach 1:
The patent merges Fibre Channel and Ethernet networks into a single converged network infrastructure using FCoE technology. Hosts and storage arrays communicate over a unified Ethernet network while maintaining Fibre Channel protocol semantics through encapsulation, eliminating the need for separate physical networks and reducing adapter and cable complexity.
Solution Approach 2:
The patent enables Ethernet network infrastructure to serve dual purposes: carrying both standard Ethernet traffic and encapsulated FCoE traffic. This multi-functionality allows a single network adapter and cable infrastructure to support both protocols, reducing hardware complexity while maintaining the performance characteristics of Fibre Channel.
Data Source
AI summary
A system and method for transmitting packets over two different network protocols without protocol conversion in any switches. A computer system comprises host computers and target storage arrays, or targets, coupled to one another through a Enhanced Ethernet network. Each of the host computers and the targets is configured to transmit encapsulated packets, such as a Fiber Channel over Ethernet (FCoE) packet. During system configuration, each of the targets is set to be the only target included in a virtual local area network (VLAN) with a corresponding unique VLAN identifier (ID). A given host computer logins to multiple assigned targets using a predefined Fiber Channel protocol. In response to a login request, a corresponding target assigns and conveys a N_Port ID that comprises a VLAN ID and a unique Host ID to the host computer in a reply message. A virtual link is established between the host computer and the target storage array.